Eaton D170 Service

Dana® Spicer ® Steer Axles
D170 Series
D190 Series
D590 Series
Service Manual AXSM-0057 April 2005
For the most current information, visit the Roadranger web site at www.roadranger.com
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General Information
General Information
General Inspection
The description and specifications contained in this service publication are current at the time of printing.
Dana Corporation reserves the right to discontinue or to modify its models and/or procedures and to change specifications at any
time without notice.
Any reference to brand names in this publication is made simply as an example of the types of tools and materials recommended
for use and should not be considered an endorsement. Equivalents, if available, may be used.
Important Notice
This symbol is used throughout this WARNING: Failure to follow indicated

manual to call attention to procedures procedures creates a high risk of personal
where carelessness or failure to follow injury to the servicing technician.
specific instructions may result in
personal injury and/or component CAUTION: Failure to follow indicated
damage. procedures may cause component
damage or malfunction.
Departure from the instructions, choice
of tools, materials and recommended IMPORTANT: Highly recommended
parts mentioned in this publication procedures for proper service of this unit.
may jeopardize the personal safety
of the service technician or vehicle Note: Additional service information not
operator. covered in the service procedures.
Tip: Helpful removal and installation

procedures to aid in the service of this unit.
Always use genuine Dana replacement parts.
i
General Information
Table of Contents
Drive
Wheel Pinion
Differential page 25
Assembly
page 35 Power
Divider
Carrier page 12
Assembly
page 23
Seals
page 55
Inter-Axle
Lockout
page 11
Differential
Carrier
Wheel
Assembly
Differential
page 8
Lock
page 48 Housing
Wheel Breather
End Seal page 58
page 59 Output Shaft Lubrication
Assembly & page 66
Rear Cover
page 49
ii
Table of Contents
Introduction ........................................................1 Remove Output Shaft Assembly .......................50

Model Identification ............................................2 Overhaul and Assemble Output Shaft Assembly 52
Parts Identification ...................................................... 2 Measure ............................................................54
Failure Analysis ...................................................4 Replace Seal .....................................................55
Prepare the Parts for Inspection ................................. 5 Guidelines for Reusing Yoke...................................... 56
Inspection ...........................................................6 Service Kit .........................................................57
Endplay Procedure ...................................................... 7 Housing Breather ..............................................58
Check Input Shaft Endplay (Forward Axle) .................. 7
Wheel End Seal - Parts Exploded View .............59
Check Output Shaft Endplay (Forward Axle)................ 7
Remove and Overhaul Wheel End Seal .............60
Differential Carrier Assembly - Parts ...................8
Adjust Wheel Bearing ........................................61
Remove Differential Carrier -
Verify Wheel Endplay Procedure .......................63
(Forward and Rear) .............................................9
Readjust Wheel Endplay Procedure ........................... 63
Install Differential Carrier (Forward and Rear) ...10 Lubricate Wheel End .........................................64
IAD Differential Lock Disassembly ....................11 Wheel Ends with an Oil Fill Hole ................................ 64
Inter-Axle Lockout..................................................... 11 Wheel Ends Without Oil Fill Hole ............................... 65
Power Divider - Parts Exploded View ................12 General Lubrication Information .......................66
Power Divider Disassembly - Forward Approved Lubricants ................................................. 66
Carrier Assembly ...............................................13 Recommendations for Viscosity/Ambient
Pump Disassembly ...........................................15 Temperature .............................................................. 66
Lube Manifold Disassembly ...................................... 16 Lube Change Intervals ......................................67
Table of Contents
Manifold Assembly ...........................................17 Change Lube .....................................................68
Pump Assembly ................................................18 Drain.......................................................................... 68
Power Divider Assembly ...................................19 Fill.............................................................................. 68
Carrier Disassembly - Forward Carrier Standpipes ........................................................69
Final Check ................................................................ 70
Assembly ..........................................................23
Proper Vehicle Towing ......................................71
Pinion Removal .................................................25
Power Divider Operation (Power Flow
Forward Axle Pinion Assembly - Parts
and Torque Distribution) ...................................72
Exploded View ..................................................27
Rear Axle Pinion Assembly - Parts Exploded View.... 27 Operate Wheel Differential Assembly ................74
Control Systems for Differential Lock ........................ 74
Drive Pinion Overhaul and Assembly -
Wheel Differential Lock .....................................76
Forward and Rear Carrier Assembly ..................28
Wheel Differential - Parts Exploded View ..........35 Power Divider - Parts Exploded View ................78
Forward Axle Pinion Assembly -
Wheel Differential Disassembly .........................36
Parts Exploded View .........................................79
Wheel Differential Assembly .............................38
Rear Axle Pinion Assembly - Parts
Wheel Differential Assembly ............................40
Exploded View ..................................................80
Adjust Tooth Contact Position ..........................45
Wheel Differential Lock - Parts
Wheel Differential Lock -
Exploded View ..................................................81
Housing and Output Shaft Assembly -
Install and Adjust Wheel Differential Lock .........48
Housing and Output Shaft Assembly -
Fastener Torque Specifications .........................83
General Information
Introduction
Dana Corporation, Commercial Vehicle Systems Division, pre- Model Information
sents this publication to aid in maintenance and overhaul of
The following models are included in this publication:
Dana tandem drive axles.
Heavy Tandems
Instructions contained cover the models listed. Their design is
similar, with primarily differences in load capacity. Capacity D40-170 D46-590HP
variations are achieved by combining basic differential carrier D40-170(P) D50-170
assemblies with different axle housings, axle shafts and wheel
equipment. D40-170D(P) D52-190P
The suffix letter “P” in the model number indicates optional D46-170 D52-190DP
lube pump. The pump is designed to provide additional lubri- D46-170(P) D52-590P
cation to the inter-axle differential and related parts.
D46-170D(P) D60-190P
D46-170H D60-590P
D46-170H(P) D70-190P
D46-170DH(P)
Model Listing
D 46-1 7 0 D
Options
D - Dual Drive Forward Axle C - Controlled Traction
with Inter-Axle Differential D - Differential Lock
G - Single Rear Axle (Global) E - High Entry Single
R - Dual Drive Rear Axle H - Heavy Wall
S - Single Rear Axle (N.A.) I - Integral Brake
L - Limited-Slip
GAW Rating P - Lube Pump
x 1000 lbs. (N. America) "-" R - Retarder Ready
x 1 Tn. (Europe) "." W - Wide-Track
Gear Type Design Level

1 - Standard Single Reduction
2 - Dual Range Head Assembly Series
3 - Planetary Double Reduction
4 - Open
5 - Helical Reduction
1
General Information
General Information
Model Identification
Drive Axle
1 - Country or origin 4 - OEM part number assigned to the axle build

2 - Axle model identification 5 - Carrier assembly serial number assigned by the
3 - Specification number assigned to the axle built by Dana. manufacturing plant
Identifies all component parts of the axle including special 6 - Axle gear ratio
OEM requirements such as yokes or flanges. 7 - Carrier assembly production or service part number
Parts Identification
Axle Housing Axle Shaft
®
erLBS.
Spic
.
. NO
PT CAP. .
G. NO IN
HS I.D. DE
G. MA
HS ING
US
HO
1 - ID Tag 2 - Axle shaft part number
2
General Information
Ring Gear and Pinion

Note: Ring gear and drive pinion are matched parts and must
be replaced in sets.
8 3
38
L70
127381 OF 17 G
SPICER 41-8 NL2
4
1 6
7
5 2
8
8-41
12
6
70
SPICER
H
17
7
G
428
127
3
1
L7038
6-39
JD77
85405
86
N
TO
EA
4
1 - Part number
2 - Number of ring gear teeth
3 - Manufacturing numbers
4 - Matching gear set number
5 - Number of pinion teeth
6 - Date code
7 - Indicates genuine Spicer parts
8 - Heat code
3
Inspection
Failure Analysis
Failure analysis is the process of determining the original Document the Problem
cause of a component failure in order to keep it from
Here are some guidelines for starting to learn about a failure.
happening again. Too often, when a failed component is
replaced without determining its cause, there will be a recur- • Talk to the operator of the truck.
ring failure. If a carrier housing is opened, revealing a ring
• Look at the service records.
gear with a broken tooth, it is not enough to settle on the bro-
ken tooth as the cause of the carrier failure. Other parts of the • Find out when the truck was last serviced.
carrier must be examined. For a thorough understanding of
Ask the following questions:
the failure and possible insight into related problems, the
technician needs to observe the overall condition of the vehi- • In what type of service is the truck being used?
cle.
• Has this particular failure occurred before?
No one benefits when a failed component goes on the junk
Inspection
• How was the truck working prior to the failure?
pile with the cause unknown. Nothing is more disturbing to a
customer than a repeat failure. Systematically analyzing a fail- You need to be a good listener. Sometimes, insignificant or
ure to prevent a repeat occurrence assures quality service by unrelated symptoms can point to the cause of the failure.
avoiding unnecessary downtime and further expense to the
Ask the following questions:
customer.
• Was the vehicle operating at normal temperatures?
The true cause of a failure can be better determined by
knowing what to look for, determining how a piece of the • Were the gauges showing normal ranges of opera-
equipment was running, and learning about previous prob- tion?
lems. In the case of a rebuilt rear axle, mismatched gears may
• Was there any unusual noise or vibration?
have been installed.
After listening, review the previous repair and maintenance
The more successful shops prevent repeat equipment failures
records. If there is more than one driver, talk to all of them
by developing good failure analysis practices. Knowing how
and compare their observations for consistency with the
to diagnose the cause of a premature failure is one of the
service and maintenance records. Verify the chassis Vehicle
prerequisites of a good heavy-equipment technician.
Identification Number (VIN) number from the vehicle identifi-
How to Diagnose a Failure cation plate, as well as the mileage and hours on the vehicle.
The following five steps are an effective approach to good
failure diagnostics.
1. Document the problem.
2. Make a preliminary investigation.
3. Prepare the parts for inspection.
4. Find the cause of the failure.
5. Correct the cause of the problem.
4
Inspection
Make a Preliminary Investigation Find the Cause of the Failure

These steps consist of external inspections and observations Here begins the real challenge to determine the exact cause of
that will be valuable when combined with the results of the the failure. Keep in mind that there is no benefit to replacing a
parts examination. failed part without determining the cause of the failure. For
example, after examining a failed part and finding that the fail-
• Look for leaks, cracks or other damage that can
ure is caused by a lack of lubrication, you must determine if
point to the cause of the failure.
there was an external leak. Obviously, if there is an external
• Make note of obvious leaks around plugs and seals. leak, just replacing the failed gear is not going to correct the
A missing fill or drain plug would be an obvious situation.
cause for concern.
Another important consideration is to determine the specific
• Look for cracks in the carrier housing (harder to see, type of failure which can be a valuable indicator for the cause
but sometimes visible). of failure. The following pages show different types of failures
and possible causes. Use this as a guide in determining types
• Does the general mechanical condition of the vehicle
of failures and to correct problems.
indicate proper maintenance or are there signs of
neglect? Correct the Cause of the Problem
• Are the tires in good condition and do the sizes Once the cause of the problem has been determined, refer to
match? the appropriate service manual to perform the repairs.
• If equipped with a torque-limiting device, is it work-
ing properly?
During the preliminary investigation, write down anything
out of the ordinary for later reference. Items that appear
insignificant now may take on more importance when the
subassemblies are torn down.
Prepare the Parts for Inspection

After the preliminary investigation, locate the failure and pre-
pare the part for examination. In carrier failure analysis, it may
be necessary to disassemble the unit.
• When disassembling subassemblies and parts, do
not clean the parts immediately since cleaning may
destroy some of the evidence.
• When tearing down the drive axle, do it in the recom-
mended manner. Minimize any further damage to the
unit.
• Ask more questions when examining the interior of
the carrier. Does the lubricant meet the manufacturer
specifications regarding quality, quantity and viscos-
ity? As soon as you have located the failed part, take
time to analyze the data.
5
Inspection
Inspection
Clean Note: Replace conventional gaskets with silicone rubber
gasket compound (included in many repair kits). The
1. Wash steel parts with ground or polished surfaces
compound provides a more effective seal against lube
in solvent. There are many suitable commercial
seepage and is easier to remove from mating surfaces
solvents available. Kerosene and diesel fuel are
when replacing parts.
acceptable.
1
WARNING
Gasoline is not an acceptable solvent because of its
extreme combustibility. It is unsafe in the workshop envi-
ronment.
2. Wash castings or other rough parts in solvent or
clean in hot solution tanks using mild alkali solu- 2
tions.
Note: If a hot solution tank is used, make sure parts are
1 - Axle housing
heated thoroughly before rinsing.
2 - Machined surface
3. Rinse thoroughly to remove all traces of the cleaning
solution. Inspect Components
4. Dry parts immediately with clean rags. Inspect all steel parts for:
5. Oil parts. • Notches, visible steps or grooves created by wear.
Inspection
• If parts are to be reused immediately: Lightly oil. • Pitting or cracking along gear contact lines.
• If parts are to be stored: Coat with oil, wrap in • Scuffing, deformation, or discolorations. These are
corrosion resistant paper and store in a clean, signs of excessive heat in the axle and are usually
dry place. related to low lubrication levels or improper lubrica-
tion practices.
Inspect Axle Housing
In addition, inspect the following for damage:
Axle housing inspection and repairs are limited to the
following checks or repairs. • Differential gearing.
• Visually inspect axle housing for cracks, nicks, and • Bearings for loose fit on drive pinion, pilot bearing,
burrs on machined surfaces. and differential bearings.
• Check carrier bolt holes and studs for foreign • All fasteners for rounded heads, bends, cracks, or
material. damaged threads.
• Replace damaged fasteners. Look for loose studs or • Inspect machined surfaces of cast or malleable
cross threaded holes. parts. They must be free of nicks, burrs, cracks,
scoring, and wear.
• Look for elongation of drilled holes, wear on sur-
CAUTION faces machined for bearing fits and nicks or burrs in
mating surfaces.
Any damage which affects the alignment or structural integ-
rity of the housing requires housing replacement. Do not Inspect Primary Gearing
repair by bending or straightening. This process can affect Before reusing a primary gear set, inspect teeth for signs of
the material's properties and cause it to fail completely excessive wear. Check tooth contact pattern for evidence of
under load. incorrect adjustment.
• Check all seals and gaskets.
6
Inspection
Endplay Procedure Check Output Shaft Endplay (Forward Axle)

1. Position dial indicator at yoke end of output shaft.
Check Input Shaft Endplay (Forward Axle) 2. Push in on output shaft and zero the dial indicator.
Note: Before disassembling the power divider, measure and 3. Using a pry bar, move output shaft axially and mea-
record input shaft endplay. sure/record endplay.
1. Position dial indicator at yoke end of input shaft.
2. Push in on input shaft and zero the dial indicator.
3. Using a pry bar, move input shaft axially and mea-
sure/record endplay.
Adjustment
Correct endplay for a new assembly is 0.001" to 0.015". The
maximum endplay for a used assembly is no more than
0.015". If endplay is incorrect, contact Dana.
Adjustment
Correct endplay for a new assembly is 0.001" to 0.005". See
the "Input Shaft Endplay" procedure in the "Power Divider
Assembly" section for proper endplay adjustment procedure.
7
Differential Carrier Assembly
Differential Carrier Assembly - Parts
1
4 2
3
1
2
Differential Carrier
Assembly
1 - Carrier fasteners
2 - Carrier assembly
3 - Forward axle assembly
4 - Rear axle assembly
8
Remove Differential Carrier - (Forward and Rear)

Note: The removal of the forward carrier does not require dis-
connecting of the inter-axle driveline and removal of the
output shaft yoke assembly as most other Dana tan-
dems require.
Standard Differentials
1. Block the vehicle.
2. Drain axle lubricant.
3. Rear Only: Disconnect inter-axle driveline.
4. Front Only: Disconnect main driveline.
5. Front Only: Disconnect differential lockout air line.
6. Disconnect lead wires to the selector switch and air
line at shift cylinder.
7. Remove axle shafts.
WARNING
Do not lie under carrier after fasteners are removed. Use

transmission jack to support differential carrier assembly
prior to loosening fasteners.
8. To remove axle shaft, remove axle stud nuts.
(If used, remove lock washers and taper dowels.)
9. Remove axle shafts.
Note: All models in this publication use axle shafts with
unequal lengths. Axle shafts may also be location spe-
cific with various wheel equipment. Do not misplace axle
shafts from their intended location. Identify left and right
shafts for reference during reassembly.
TIP: If necessary, loosen dowels by holding a brass
drift in the center of the shaft head and striking drift
with a sharp blow with a hammer.
CAUTION
Do not strike the shaft head with a steel hammer. Do not
use chisels or wedges to loosen shaft or dowels.
10. Remove carrier capscrews, nuts, and lock washers.
11. Remove differential carrier assembly.
9
Install Differential Carrier (Forward and Rear)
IMPORTANT
Before installing carrier assembly, inspect and thoroughly

clean interior of axle housing using an appropriate solvent
and clean rag.
1. Apply Dana approved RTV compound on axle
housing mating surface as shown in the illustration.
Completely remove all old gasket material prior to
applying new material. Compound will set in
5 minutes. Install carrier before compound sets or
reapply.
Differential Carrier
Assembly
1 - Apply silicone gasket in this pattern
Tip: To assist in installing complete differential car-

rier use two pieces of threaded rod (M16 X 1.5)
threaded into carrier capscrew holes. Rod should be
approximately 6" long. Use these to pilot the carrier
into the housing.
2. Install carrier to housing, lock washers, capscrews
and nuts. Torque to proper specification. Torque to
250–290 lbs. ft. (339–393 N•m).
3. Install axle shafts and axle stud nuts. (If used, also
install lock washers and tapered dowels.)
4. Add axle lubricant. Fill to bottom of filler hole.
5. Rear Only: Connect inter-axle driveline, making sure
all yokes are in phase. Lubricate u-joints.
6. Front Only: Connect main driveline, making sure all
yokes are in phase. Lubricate u-joints.
7. Front Only: Connect differential lockout air line.
10
Inter-Axle Lockout
IAD Differential Lock Disassembly
Inter-Axle Lockout Disassembly

1. With the axle installed in vehicle, place differential
Integral Shift Cylinder with Welded Push Rod Assembly
lock selector valve in the disengaged or unlocked
position.
2. Disconnect the differential lockout air line.
3. Remove the piston cover.
2
3 4. Remove the piston and o-ring assembly with pliers.
4 1 Note: In order to remove the shift fork and push rod parts,
5 first remove the power divider cover. See the Power
Divider section.
Assembly
1. Assemble the o-ring onto the piston. Apply silicone
grease to the o-ring.
2. Gently push the piston o-ring assembly into the lock-
1 - Compression spring out cylinder bore. Make sure the piston assembly is
2 - Shift fork assembly pushed in all the way.
3 - Piston
4 - O-ring 3. Install the piston cover. Tighten by hand and then
5 - Piston cover torque from 50-75 lbs. ft. (68-102 N•m).
4. Connect the differential lock air line.
5. Cycle the lockout to make sure there are no leaks
and the system is operating properly.
11
Power Divider
Power Divider - Parts Exploded View
1
2
44
3
4
5
6
7 High Entry Input
8 Shaft Assembly
19
Power Divider
20
9
21
22 27
10
25
14
26 15 16
28 11 17
29
18
30 12
23 31 32
11
24
33 13
34
35
43 36
42 37
41 38
39
40
1 - Output shaft nut 16 - Pin 31 - Input cover

2 - Output yoke 17 - Output side gear 32 - Input cover capscrew
3 - Output seal 18 - Pump 33 - Bearing cup and cage
4 - Output shaft bearing snap ring 19 - Inter-axle differential 34 - Input seal
5 - Outer bearing cup 20 - Helical side gear 35 - Input yoke
6 - Outer bearing cone 21 - Thrust washer 36 - Input nut
7 - Inner bearing cone 22 - Lockout sliding clutch 37 - Piston
8 - Inner bearing cup 23 - Shift fork spring 38 - O-ring
9 - Output shaft 24 - Shift fork assembly 39 - Piston cover
10 - Seal manifold 25 - V-ring 40 - Pinion cover
11 - Clamp 26 - Input shaft 41 - Input cover capscrew
12 - Seal manifold feed tube 27 - Input shaft 42 - Input cover
13 - Sump screen 28 - Input shaft bearing cone 43 - Carrier housing
14 - Output side gear bearing cup 29 - Carrier housing
15 - Output side gear bearing cone 30 - Locking capscrew
12
Power Divider
Power Divider Disassembly - Forward Carrier Assembly

Use these instructions with the carrier assembly in or out of
the vehicle.
CAUTION
1. Disconnect the main driveline.
During removal of the power divider cover, the inter-axle
2. Disconnect the lockout airline. differential (IAD), input shaft assembly or IAD shift system
3. Drain the axle lubricant into a clean oil pan. may fall from the carrier if not careful. Use caution to pre-
vent injury or damage.
4. Remove the input yoke nut and yoke.
5. To de-stake the nut, use a chisel or drift with a round
tip. The flange of the nut must be pushed far enough
outward so that the staked area will not interfere with
the input shaft threads when the nut is removed. See
diagrams below.
CAUTION
8. For High Entry Applications Only:
Failure to de-stake the pinion nut will result in damage to Remove the input shaft and gear assembly. Proceed
the drive pinion threads when removed. The pinion nut to step 13.
should never be reused, always replace with new.
2
9. Remove the input shaft, sliding clutch, shift fork and
3
spring as an assembly.
1 - Round Tipped Chisel
2 - Machined Slot In Pinion
3 - Nuts Staking Flange
6. Remove the input seal.

Note: Do not reuse the seals after disassembly.
7. Remove the power divider cover assembly. Use the
tabs provided to free the cover from the carrier
assembly.
13
Power Divider
10. Remove the thrust washer and helical side gear. 13. To replace the input bearing cup, back off the
bearing cage locking fastener.
11. Remove the inter-axle differential assembly.
Power Divider
1 - Locking Fastener
14. Input cage is threaded into the PDU cover, use the
proper tool to remove the cage from the cover.
12. Remove the output side gear and pump assembly.
15. Use a suitable bearing puller to replace the input

bearing cup.
14
Power Divider
Pump Disassembly
For output side gear and/or pump replacement, follow the 3. Remove pump from the output side gear.
procedure below.
1. Remove the output side gear bearing cone, if
required.
4. Remove the output side gear bearing cup from the

carrier with the proper bearing puller tool.
1 - Press
2 - Press Tool
2. Remove pump locking dowel pin from the hole in the

output side gear hub.
15
Power Divider
Lube Manifold Disassembly

1. Disconnect the hose from the lube manifold.
2. Remove the manifold assembly by prying it out
around the inner diameter.
IMPORTANT
Once removed, the seal manifold assembly cannot be

reused. This component should always be replaced with
new. Use the same removal procedure for the output side
Power Divider
gear seal removal on the non-pump models.
Note: Seals are not sold separately from the manifold.
1 - Barbed Nipple
16
Power Divider
Manifold Assembly
1. Install the manifold assembly into the output side Note: For non-pump manifold installation, it is important to
gear bore in the carrier. Make sure the barbed nipple line up the oil inlet path hole in the manifold with the oil
is lined up with the opening in the carrier casting. path opening in the carrier manifold casting.
1 - Manifold Oil Inlet Hole
5. Attach the suction screen to the end of the hose.
1 - Barbed Nipple
2. Install the hose clamp on the hose, push the hose

onto the barbed fitting and slide the clamp over the
barbed nipple.
3. Route the suction end of the hose through the holes
in the carrier casting to the bottom of the carrier. If the unit does not have a pump, go to the Power Divider
Assembly section.
If the unit contains a pump, go to the Pump Assembly section.
4. Fully press the manifold assembly into position.

Note: Use care when pressing the manifold assembly to avoid
damaging the seals and barbed nipple. Do not over-
press plastic.
17
Power Divider
Pump Assembly
Use these instructions with the carrier assembly in or out of 2. Install the pump locking dowel pin into the hole in
the vehicle. the output side gear hub. Make sure the pin is lined
up with the machined slot in the pump body.
If the unit does not have a pump, go to the Power Divider
Assembly section.
Note: Keep work area clean. Dirt is an abrasive and will cause
premature wear of the otherwise serviceable parts.
Note: For non-pump models, see page 17 for output side gear
seal manifold installation.
Power Divider
Note: Only service the power divider if the differential carrier
is secured in a stand or while the axle is still attached to
the housing.
1 2
CAUTION
During installation of power divider cover, the inter-axle

differential (IAD), input shaft assembly or IAD shift system
parts may fall from the carrier if not careful. Use caution to
prevent injury or damage.
1. Install the pump into the output side gear so that the
pump shaft is facing toward the teeth end of the side
gear. 1 - Machined Slot
2 - Pin
18
Power Divider
Power Divider Assembly

1. Install output side gear bearing cone and press until Note: Install in the same direction as removed.
fully seated. Use proper press tools.
5. Install the helical side gear so that the clutch teeth

are facing upward in the carrier.
1 - Press
2 - Press Tool
2. Fully press the output side gear bearing cup into the
carrier seat.
6. Install helical side gear thrust washer.
IMPORTANT
When inserting the input shaft assembly through the IAD

components, turn the shaft as necessary to align the slot of
the input shaft with the pump drive shaft. The keyway on the
threaded end of the input shaft is aligned with the pump
driver slot. This can be used as a visual aid during assem-
bly.
3. Install the output side gear. Apply a thin layer of oil
to the output side gear boss before installing into the
seal.
Note: For non-pump models, fill bore of output side gear
models with synthetic grease.
4. Install the inter-axle differential.
19
Power Divider
Helical Gear Bushing Replacement: 9. Install the sliding clutch so that the teeth are facing
up.
a. If bushing removal is needed, the bushings
must exit from the thrust side of the helical side
gear.
Power Divider
1 - Tap out bushings 10. If removed, press the new input bearing cone in
place until seated using the proper press sleeve or
b. Install bushings in helical side gear. Bushing bearing installer.
must be installed from the thrust side of the
helical side gear. See illustration for installation
depth.
1 1
2
5
3 6 1.25 to 1.75 mm
4
1 - Press 1 - Press
2 - Sleeve 2 - Press Tool
3 - 1st bushing (press to shoulder) 3 - Bearing
4 - Shoulder 4 - Input shaft
5 - Sleeve
6 - 2nd bushing (recess 1.25 to 1.75 mm) 11. For High Entry Applications Only:
Install shaft/gear assembly. Proceed to step 13.
7. Install the helical side gear thrust washer.
8. Install the v-ring seal to the sliding clutch.
20
Power Divider
12. Assemble the sliding clutch, shift fork and fork 14. Install input cover and capscrews. Torque to the
spring to the input shaft and install assembly into proper specifications. See the Torque Chart on page
carrier. Make sure that the shift fork rod is piloted in D-1. Tighten fasteners in a criss cross pattern.
the carrier bore.
15. Install input shaft bearing adjuster, adjust inward

until snug against the bearing cone.
IMPORTANT
Before installing input cover, inspect and thoroughly clean
mating surfaces using an appropriate solvent and clean
rag.
Note: Completely remove all old gasket material prior to
Input Shaft Endplay
applying new Loctite.
16. Back off input bearing cage one notch and check
13. Apply a bead of Loctite 518 to the carrier surface as
endplay. Endplay should be between 0.001" to 0.005"
shown in the illustration.
(0.03 to 0.13 mm). Rotate cage in or out to get
proper setting.
190 Cover
1 - One Notch
170 Cover
21
Power Divider
17. Line up cage slot with locking fastener. Turn in Note: High entry models should be set to an endplay of 0.001"
input cage locking fastener and torque to the proper to 0.005".
specifications. See Torque Chart.
Power Divider
18. Install input seal using proper installation tool. 22. Use a punch with a round tip to stake the pinion nuts
flange into the machined slot in the pinion shaft. See
diagram below.
CAUTION
The stake must be deep enough to enter the machined slot
of the input shaft. See diagram below.
1
19. Install yoke and slinger assembly.
1 - Round Tipped Chisel 3

3 - Machined Slot In Pinion
20. Install input shaft flanged nut and torque to the

proper specifications. See Torque Chart. WARNING
Note: A torque multiplier is recommended. If difficulty achiev- Failure to stake the pinion nut properly may result in the nut
ing correct torque, torque the nut with the truck wheels coming loose during service. The pinion nut should never
on the ground and with the axle shaft installed. be reused, always replace with new.
21. Verify that the endplay is between 0.001" to 0.005"
(0.03 to 0.13 mm). If not, readjust until the proper
specification is achieved.
22
Carrier Assembly
Carrier Disassembly - Forward Carrier Assembly

For models having the wheel differential lock option, refer to 4. Remove the shift fork and sliding clutch assembly.
the following procedure. These parts must be removed first
Note: Do not disassemble the shift fork from the sliding
before further disassembly of the wheel differential can take
clutch unless parts are to be replaced. To disassemble,
place.
use a pin punch to remove spring pin from the fork leg.
1. For ease of service, mount differential carrier in head The sliding clutch can now be removed from the fork.
stand with the differential lock facing up.
2. Remove the threaded cylinder cap. 5. Remove the shift fork spring.
3. Remove the piston push rod from the shift fork.
Note: Omit this step if the ring gear is to be replaced. If the

ring gear is to be reused, check the tooth contact pattern
and ring gear backlash before disassembling the carrier
assembly. When checking the backlash, a yoke or helical
gear must be installed and torqued to the proper specifi-
cation to get an accurate reading. Best results are
obtained when tooth contact patterns are maintained in
used gearing.
23
Carrier Assembly
6. Mount the differential carrier in a head stand with the 8. Use Dana’s wheel diff. bearing adjustment tool (part
wheel differential facing upward. number 513061) to back off the threaded cups and
remove.
1 - Threaded bearing cup

2 - Adjustment plate
Note: For easier disassembly, loosen but do not remove the
pinion nut. 9. Use a chain hoist and the proper strap, lift the
ring gear and wheel differential assembly from
7. Remove the carrier differential bearing cap the carrier.
capscrews and bearing caps.
Carrier Assembly
24
Drive Pinion
Pinion Removal
1. For D170 assembly, remove the pinion cover. Use a
flat chisel to remove the cover from the carrier.
b. For S190 disassembly, use the pry slots pro-
vided at each end of the pilot web.
2. If a pilot web is used, remove the web capscrews.

a. For D190 disassembly, install a M10 x 1.5
bolt in the threaded jack holes found in-between
the pilot web capscrews.
1 1 - Slots
3. Before the pinion nut can be loosened, you must de-

stake the nut from the slot of the pinion.
1
4. To de-stake the nut, use a chisel or drift with a round

1 - Threaded Jack Holes tip. The flange of the nut must be pushed far enough
outward so that the staked area will not interfere with
the pinion threads when the nut is removed. See dia-
gram on next page.
25
Drive Pinion
7. Use the proper pressing tool to press the end of the

pinion until free from the pinion bearings.
Drive Pinion
CAUTION
1
Failure to de-stake the pinion nut will result in damage to
the drive pinion threads when removed. The pinion nut
should never be reused, always replace with new.
1
2
3
1 - Round Tipped Chisel
2 - Machined Slot In Pinion 1 - Press
8. Forward Axles Only: Remove the pinion spacer and

5. Remove the pinion nut. the helical gear.
6. Place carrier assembly into a press, place a 2" x 6" x
6" wood block under the pinion. This will ensure that
when the pinion is pressed free from the bearings
the pinion will not be damaged.
2
IMPORTANT
The bearing spacer will be reused or used as a starting

point when resetting the pinion bearing preload. Do not dis-
4 card this part.
1 - Carrier Assembly
2 - Press
3 - Pinion
4 - Wood Block
26
Drive Pinion
Forward Axle Pinion Assembly - Parts Exploded View
2
1
3
2 4
5
6
7
8
9
1 - Pinion pilot bearing 4 - Pinion bearing cup - inner 7- Pinion bearing cup - outer
2 - Pinion 5 - Pinion helical gear 8 - Pinion bearing cone - outer
3 - Pinion bearing cone - inner 6 - Pinion bearing spacer 9 - Pinion nut
Rear Axle Pinion Assembly - Parts Exploded View
2
3
4
1 5
6
2
7
8
9
10
1 - Pinion pilot bearing 5 - Pinion bearing spacer 9 - Yoke

2 - Pinion 6 - Pinion bearing cup - outer 10 - Pinion nut
3 - Pinion bearing cone - inner 7 - Pinion bearing cone - outer
4 - Pinion bearing cup - inner 8 - Oil seal
27
Drive Pinion
Drive Pinion Overhaul and Assembly - Forward and Rear Carrier Assembly
Drive Pinion
The preload of the bearings on the drive pinion is adjusted by 2. Remove the inner pinion bearing cone from the pin-
a spacer between the inner and outer bearing cones and the ion using a split-type puller. Use two procedure
helical gear. The preload is adjusted by changing the thick- steps to remove each bearing.
ness of the spacer. A thicker spacer will decrease the preload,
a. Mount the puller vertically to separate the
a thinner spacer will increase the bearing preload.
bearing from the pinion. This action will force
The following procedure covers both the forward and rear axle the puller halves behind the bearing race and
carrier overhaul and assembly. start moving the bearing from the pinion.
Note: See carrier disassembly for instructions on pinion and
yoke removal.
1. If the model of axle uses a pilot bearing, remove the
bearing using a split-type puller. Use two procedure
steps to remove each bearing.
a. Mount the puller vertically to separate the
bearing from the pinion. This action will force
the puller halves behind the bearing race and
start moving the bearing from the pinion.
b. Mount the puller horizontally to press the

bearing from the pinion.
1
b. Mount the puller horizontally to press the

bearing from the pinion.
1 - Press
28
Drive Pinion
IMPORTANT
Use the correctly sized spacer. Do not use shim stock or
grind spacers. These practices can lead to loss of bearing
preload and gear or bearing failure.
To prevent bearing damage, use suitable sleeve that only

contacts the inner race of bearing cone.
3. Use a press sleeve to install the inner bearing cone
and pilot bearing, if used, onto the pinion. Apply
pressure until the bottom of the cone touches the
shoulder of the pinion. Apply lubricant to the cone of
the bearing.
c. If replacement of the output shaft side gear
85405
N
TO
6-39
EA
86 JD77
bearing cup is necessary, use either of the fol-

lowing methods:
Weld: Place a weld bead around the inside of
the cup, when the weld cools the cup will fall
out.
L7038 Hammer: Use slipper to get under the cup and
with a hammer and drift from the back side of
carrier tap out bearing cup.
d. To install the outer bearing cup, place the car-
rier in a press with the top of the carrier facing
up.
e. Place the cup in the bore, use a sleeve or
4. If removed, install the inner and outer bearing cups bearing driver tool to press the cup until it is
into the carrier. fully seated. Use a feeler gage to make sure the
cup is fully seated.
a. To install the inner bearing cup, place the car-
rier in a press with the bottom of the carrier fac-
ing up.
b. Place the cup in the bore, use a sleeve or
bearing driver tool to press the cup until it is
fully seated. Use a feeler gage to make sure the
cup is fully seated.
Note: If a press is not available, use a sleeve or bearing driver

and a hammer to install the cups.
29
Drive Pinion
5. For Forward Carriers Only: Install the helical with 7. To align the splines of the helical gear to the
the larger boss side facing down in the carrier. Align pinion, use a old pinion nut with a metal ring welded
Drive Pinion
the helical gear between the inner and outer bearing to the top, thread onto the pinion. Then lift the pinion
cups. while aligning the two splined surfaces.
8. Install the pinion spacer.

Note: If you are using the same drive pinion, use the same
spacer that was originally installed in the assembly. If
the drive pinion is to be replaced, the original spacer will
be used as the starting point of adjustment.
1 - Large - Long Boss
6. Place the pinion on a 6 x 6 x 6 block of wood and

lower the carrier over the pinion.
30
Drive Pinion
9. Install the outer bearing cone. 11. Align a 6” x 6” x 6” wood block under the drive pin-
ion, then lower the carrier and pinion assembly into
a press so that it is supported by the block.
10. Install a pinion nut finger tight. This will hold the pin-
ion in place while it is positioned into the press.
12. Remove the pinion nut.
13. Place a press sleeve over the top of the outer bearing
cone. Use the press to apply 5 tons of force. It is
important to rotate the carrier slightly to make sure
that the rollers of the bearing are properly seated.
31
Drive Pinion
14. With 5 tons of force on the press, you should be able 16. Run the nut down with an impact gun. The pinion
to feel a small amount of drag from the bearing as should still have the same slight drag that was
Drive Pinion
you rotate the carrier. If the carrier turns with no obtained in the press.
drag at all, the pinion spacer thickness should be
decreased by using a thinner spacer. If the carrier is
hard to turn, the spacer thickness must be
increased.
17. Secure the carrier in a head stand, rotate carrier so

the pinion nut can be torqued.
15. Remove the carrier from the press and reinstall the
pinion nut.
32
Drive Pinion
TIP: A torquing wedge can be made to hold the heli- 20. Use an lbs. in. torque wrench and correct socket to
cal gear from turning while the nut is torqued. check the rolling torque of the pinion. Read torque
while rotating the assembly. Record the rotating
torque, not the breakaway torque. Torque must be
between 20 to 50 lbs. in. If the torque recorded is not
within the specified torque, the pinion spacer must
be changed. Repeat Steps 6-17.
18. Install the wedge between the carrier wall and the
teeth of the helical gear.
21. Once the proper rolling torque is achieved, use a

punch with a round head to stake the nut collar into
the slot in the pinion.
1 - Wedge
19. Torque the nut to 800-1000 lbs. ft.

(1084-1355 N•m).
Note: Always use a new nut and coat threads with Loctite 277
if not pre-coated.
TIP: If you are unable to torque the yoke nut cor-

rectly, try torquing the nut with the truck wheels on
the ground and with the axle shafts installed.
33
Drive Pinion
24. Use a dead blow mallet to seat the cover.
Drive Pinion
CAUTION
The stake must be deep enough to enter the machined slot

of the pinion. See diagram below.
1
25. If a pilot bearing web is used, lineup the web to

the locating sleeves and tap in place with a rubber
mallet.
1 - Round Tipped Chisel 3
3 - Machined Slot In Pinion 1
WARNING
1
Failure to stake the pinion nut properly may result in the nut
coming loose during service. The pinion nut should never
be reused, always replace with new.
22. For D170 assembly, install the pinion cover. Apply a
1 - Locating Sleeves
bead of Loctite 518 sealant to the outer flange of the
cover.
26. Install capscrews and torque to the proper specifica-
tions. See the Torque Chart.
23. Install the cover, making sure that the cover is paral-
lel to the carrier opening.
34
Wheel Differential
Wheel Differential - Parts Exploded View
1
2
3
7
6
8
6
9
11
12
10
1 - Threaded bearing adj. - flange half 6 - Side gear 10 - Differential case - plain half
2 - Bearing cone - flange half 7 - Side pinion wheel diff. lock
3 - Differential case - flange half 8 - Differential spider 11 - Bearing cone - plain half
4 - Ring gear 9 - Differential case - plain half 12 - Threaded bearing adj. - plain half
5 - Ring gear bolt
35
Wheel Differential
Wheel Differential Disassembly

3. Remove the side gears, side pinions and differential
spider from the plain half case.
IMPORTANT
During the following procedures, place the
differential assembly on a malleable surface to prevent
damage when removing components.
1. Remove the differential case capscrews.
Wheel Differential
4. Place a block under the plain half, use a rubber mal-
let to remove the ring gear.
2. Remove the flange half differential case and bearing 5. Remove the bearing cones from the case halves
assembly. Use a screwdriver at the spider arm using suitable pullers.
machined slots of the case to loosen the flange from
the ring gear.
1 - Spider Arm Slots
36
Wheel Differential
6. Remove the bearing cones from the plain and flange

halves in two steps:
a. Mount the puller vertically to split the bearing.
This action will start the bearing moving off the
differential case.
b. Mount the puller horizontally to remove the

cone.
37
Wheel Differential
Wheel Differential Assembly

4. Assemble the side pinions onto the wheel differential
spider. Apply a thin coat of oil to the mating surfaces
IMPORTANT of the side pinion and differential spider. Install the
To prevent bearing damage, use suitable sleeve that only wheel differential nest on top of the side gear.
contacts the inner race of the cone. A used bearing race
would be a suitable tool. This tool should have a slit cut if
the ID is the same as the flange OD.
1. Press the new bearing cone on the plain half and
flange half bearing boss using the proper press
sleeve or bearing installation tool.
Wheel Differential
5. Install the flange half side gear. Apply a thin coat of
oil to the mating surfaces.
2. Place the plain half side of the differential case on a 6. Install the ring gear. Align the capscrew holes.
malleable surface.
3. Install the side gear. Apply a thin coat of oil to the
mating surfaces of the side gear and plain half.
1 - Match spacing of holes on each side of

spider slots
38
Wheel Differential
7. Use a rubber mallet to seat the ring gear to the plain 9. Install the ring gear capscrews.
half.
8. Install the flange half of the case. Align the capscrew

holes. 10. Tighten the ring gear capscrews with an impact gun
and then use a torque wrench to torque to the proper
specifications. See the Torque Chart.
39
Wheel Differential
Wheel Differential Assembly

Set Backlash and Bearing Preload 2. Connect the adjuster plates using the threaded rod,
washers and nuts. Tighten the nuts on the rod to
Note: To install the wheel differential assembly, properly hold the threaded cups in place. Carefully lower the
setup the gear pattern and set the differential bearing wheel differential and ring gear assembly into the
preload. This will require the use of the following Dana carrier.
tools or equivalent. These tools will allow you to align
the bearing adjuster assembly to the carrier. This tool
(part number 513061) will also gage the adjustment for
the differential bearing preload and assist in setting the
backlash. Below you will find detailed instructions
explaining each procedure.
Wheel Differential
1. The bearing adjustment tool is made up of a
threaded rod, two nuts, two washers and two adjust-
ment plates. Fit one adjustment plate to the plain half
threaded cup. Fit the other adjustment plate to the
flange half cup. The adjustment rings will fit into
slots of the threaded bearing cups stamped adjust-
ment ring.
Note: There are two ways to make sure that the threaded cups
are seated properly. If there is a misalignment, reinstall
the differential assembly at a slightly different angle.
3. Make sure there is no gap between the carrier
threads and the cup threads.
2 1
1 - No gap
1 - Threaded bearing cup

2 - Adjustment plate
40
Wheel Differential
4. Make sure that the bearings cage is parallel to the 6. Turn the plain half adjuster ring until there is zero
edge of the threaded cup. preload on the bearings. This is done by turning the
adjuster plate clockwise until you feel the threaded
cup gain resistance. The threaded bearing cup
should only be slightly snugged to achieve a zero
1 preload condition.
1 2
1 - Parallel
1 - Flange Half
5. Use a ratchet or breaker bar and a 1 ¼" deep wall 2 - Plain Half
socket to turn the flange half threaded bearing cup in
until the ring gear contacts the pinion (zero back- 7. Obtain two notches of preload by tightening the plain
lash). Back the cup out two notches of the adjust- half adjustment plate two notches. Start with the
ment plate. notch at the top, count two notches counter-clock-
wise on the adjuster plate, turn the adjuster plate so
that the notch is facing straight up.
1 - Two Notches
8. Use a rubber mallet to fully seat the threaded bearing

cups.
41
Wheel Differential
9. With a dial indicator, check the ring and pinion back- Note: If you have too much backlash, move the ring gear
lash. Set the backlash from 0.010" to 0.012". This closer to the pinion. Count the number of notches you
will give you room to adjust the contact pattern, if back off the plain half threaded cup. Each notch equals
necessary. about 0.003" (0.08 mm) of backlash.
IMPORTANT
In order to maintain the differential bearing preload, you
will need to turn the flange half threaded cup the same
amount in the same direction. If you need more backlash,
reverse the procedure.
Wheel Differential
14. Measure the ring gear total radial runout. Indicator
reading should not exceed 0.010" (0.25 mm).
10. Remove the adjuster plates and threaded rod assem-
bly.
11. Install the carrier differential bearing caps and cap-
screws. Make certain there is no gap between the
carrier cap and the carrier surface.
15. Measure the ring gear total backface runout. Indica-

tor reading should not exceed 0.010" (0.25 mm).
12. Use an impact gun to snug all carrier cap fasteners.
16. Check the ring gear tooth pattern. Paint 5 or 6 ring

gear teeth 180 degrees apart on the ring gear.
13. Recheck the backlash. For new gearing, the backlash

should be between 0.008" and 0.018" (0.20 and 0.46
mm).
Note: For used gearing, the backlash should be reset to what
it was at the time of disassembly.
42
Wheel Differential
17. With the carrier mounted in a head stand, roll the 19. Connect the end of the strap to a hoist and apply
carrier on its side. pressure to the sling.
18. Make a sling out of a strap and position around the

plain half of the wheel differential.
20. Use the correct socket and a breaker bar to rotate the
differential. The differential should be hard to turn.
Rotate the pinion until the ring gear rotates 3 or 4
times in both directions. See page 45 for descrip-
tions of correct pattern position for new and used
gearing.
43
Wheel Differential
21. When contact pattern is correct. Use a punch with a

round head to stake the threaded bearing cups in
place. Stake the outer edge of the bearing adjust-
ment ring into the machined slots in the carrier bear-
ing bore on both sides. Must be staked at two
locations. Rotate cup if necessary to provide sur-
faces for staking.
1
Wheel Differential
1 - Two Stake Locations
1 - Machined slot
2 - Bearing Adjustment Ring
3 - Round Head Punch
44
Adjust Tooth Contact Pattern
Adjust Tooth Contact Position

Adjust Ring and Pinion Tooth Contact Used Gearing - Correct Pattern
Pattern Used gearing will not usually display the square, even contact
pattern found in new gear sets. The gear will normally have a
Note: Rear axle gearing is shown in the following instructions. "pocket" at the heal end of the gear tooth. The more use a gear
Correct tooth contact patterns and adjustments are the has had, the more the line becomes the dominant characteris-
same for forward and rear axles. tic of the pattern.
Adjust used gear sets to display the same contact pattern

2
observed before disassembly. A correct pattern is up off the
toe and centers evenly along the face width between the top
land and root. Otherwise, the length and shape of the pattern
are highly variable and is considered acceptable as long as it
1 does not run off the tooth at any point.
3
4
5
6
1 - Face width
2 - Tooth depth
3 - Heel
4 - Top land
5 - Root
6 - Toe
1 - Pattern along the face width could be longer
1. Identify if new or used gearing.
Adjust Contact Pattern
2. Check tooth contact pattern (new or used gearing).
If necessary, adjust the contact pattern by moving the ring
New Gearing - Correct Pattern gear and drive pinion.
Paint six ring gear teeth 180° apart with marking compound • Ring gear position controls the backlash. This
and roll the gear to obtain a contact pattern. The correct pat- adjustment moves the contact pattern along the face
tern is slightly below center on the ring gear tooth with length- width of the gear tooth.
wise contact up off the toe. The length of the pattern in an
• Pinion position is determined by the size of the pin-
unloaded condition is approximately one-half to two-thirds of
ion bearing cage shim pack. It controls contact on
the ring gear tooth in most models and ratios.
the tooth depth of the gear tooth.
The pattern could vary in length and should cover 1/2 tooth or
more (face width). The pattern should be evenly centered These adjustments are interrelated. As a result, they must be
between tooth top land and root and should be up off the considered together even though the pattern is altered by two
tooth toe. distinct operations. When making adjustments, first adjust the
pinion, then the backlash. Continue this sequence until the
pattern is satisfactory.
45
Adjust Tooth Contact Pattern
Adjust Ring Gear Position (Backlash)

If the gear pattern shows incorrect face width contact, change
backlash by adjusting the ring gear.
If the pattern is too close to the edge of the tooth toe, move
the ring gear away from the pinion to increase backlash.
1. Loosen the bearing adjuster on the teeth side of the

ring gear several notches.
2. Loosen the opposite adjuster one notch.
3. Return to adjuster on teeth side of ring gear and
tighten adjuster until it contacts the bearing cup.
4. Continue tightening the same adjuster 2 or 3 notches
and recheck backlash.
Adjust Tooth Contact

If the pattern is concentrated at the heel (too far up the tooth),
move the ring gear toward the pinion to decrease backlash.
Pattern
1. Loosen the bearing adjuster on the teeth side of the
ring gear several notches.
2. Tighten the opposite adjuster one notch.
3. Return to adjuster on teeth side of ring gear and
tighten adjuster until it contacts the bearing cup.
4. Continue tightening the same adjuster 2 or 3 notches
and recheck backlash.
46
Wheel Differential Lock
Wheel Differential Lock - Parts Exploded View
1
9
4
5 2
6
7
8
1 - Sliding clutch 4 - Piston and rod 7 -Washer

2 - Spring 5 - O-ring 8 - Switch
3 - Clutch fork 6- Piston cover 9 - Pin
47

Install and Adjust Wheel Differential Lock
Note: With differential carrier completely assembled and 4. Lubricate piston and o-ring with silicone grease.
adjusted, install differential lock as follows: Install shift piston assembly into cylinder. Position
piston with small diameter hub toward closed end of
1. If shift fork and sliding clutch are disassembled, cylinder.
engage fork with the clutch hub and install spring pin
in the fork leg. 5. Install piston cover o-ring.
2. Position spring, shift fork and clutch in shift open- 6. Install piston cover and torque to 50–75 lbs. ft.
ing of the carrier. Align pilot hole of shift fork with (68–102 N•m).
the pilot hole of carrier. 7. Install selector switch and torque to 10–12 lbs. ft.
3. Install pushrod through shift fork, spring and carrier (14–16 N•m).
pilot hole. 8. Check selector switch operation. Check switch
electrically with an ohmmeter. Switch should be
closed when clutches are engaged and open when
disengaged.
48
Output Shaft Assembly & Rear
Cover
Housing and Output Shaft Assembly - Parts Exploded View
1
2
3
4
5
6
7
8
10
11
21
12 19 20
13
14
15
22
17 18 25
24
16 23
26
Welded Rear Cover
27
1 - Output shaft nut 10 - Rear cover 19 - Axle housing

2 - Output yoke 11 - Rear cover capscrew 20 - Breather
3 - Output seal 12 - Fill plug 21 - Breather hose
4 - Snap ring 13 - Rear cover nut 22 - Carrier capscrew
5 - Outer bearing cup 14 - Washer 23 - Nut
6 - Outer bearing cone 15 - Stud 24 - Washer
7 - Inner bearing cone 16 - Spindle nut - Outer 25 - Stud
8 - Inner bearing cup 17 - Locking ring 26 - Drain plug
9 - Output shaft 18 - Spindle nut - Inner 27 - Axle shaft
49
Cover
Remove Output Shaft Assembly

Note: For forward axle rear covers that are removable the out- 6. Remove output shaft and outer bearing cup as an
put shaft may be removed when the cover is in or out of assembly.
the axle assembly.
6
1. Disconnect the inter-axle driveline at the forward
axle rear cover position. 1
2
2. Remove yoke nut (shoulder nut).
3. Remove yoke from output shaft using appropriate
tool. 3
Output Shaft Assembly &

Rear Cover
4
1 - Yoke Puller Tool

1 - Snap Ring
2 - Outer Bearing Cup
TIP: A yoke puller tool may be made from the center
3 - Output Shaft Assembly
section of most gear puller tools, or may be pur-
4 - Inner Bearing Cup
chased from your tool distributor.
5 - Rear Cover Assembly
4. Remove oil seal. 6 - Output Seal
5. Remove snap ring.
TIP: It may be helpful to loosely reinstall the yoke
and shoulder nut giving the technician more of an
area to grip when removing the output shaft.
7. Remove the inner bearing cup from rear cover
assembly. This may be removed from inside the axle
housing when the carrier is removed, or by removal
of the forward axle rear cover.
50
Cover
8. Remove both inner and outer bearing from output 9. Remove output shaft inner bearing cup.
shaft.
Note: Components such as the inter-axle driveline, yoke, oil
1 seal and output shaft assembly should have been
removed according to normal service procedures.
Removing the differential assembly from the axle
housing is not necessary, but would ease the removal
process of the inner bearing cup from the cover bore.
a. Using a bearing puller tool, remove the inner bearing
cup.
b. Visually inspect the inner-machined bore surface of
the welded-on cover for nicks and burrs. Repair if
necessary.
1 - Press
51
Cover
Overhaul and Assemble Output Shaft Assembly

Note: Lubricate the parts with gear lube during assembly. 7. Using a sleeve and driver (hammer), install the outer
bearing cup into the housing assembly over the out-
1. The output shaft bearings are assembled with both put shaft bearing cone.
bearing cones back to back. Use a press and a sleeve
to install one bearing at a time. 8. Using snap ring pliers, install the snap ring that fas-
tens the outer bearing cup into the welded-on cover
assembly.
CAUTION 9. Check the endplay of the output shaft. New assem-

blies should measure 0.001" to 0.015" (0.03 to 0.38

mm)
To prevent bearing damage, use a suitable sleeve that only
contacts the bearing race. Note: Use the bearing cup driver to insure seating of snap
ring after installation with snap ring pliers.
Rear Cover
2. Apply pressure until the inner bearing cone touches 1
the shoulder of the output shaft.
3. Apply pressure until the back of the outer bearing 2
cone touches the back of the inner bearing.
Note: Axle housings with welded-on covers procured through 3
service will include the inner bearing cup as part of the
"service" axle housing assembly. Go to Step 6 if the inner
cup has already been installed. 4
4. Lightly coat the output bore of the axle housing
cover with a 9.5 mm (.38") wide application of Loc- 5
tite 680 where the bore contacts the inner bearing
cup. Do not apply Loctite outside of this area—to the
bearing rollers or outboard of the inner cup bore.
Improper application of the Loctite could lock the
rollers or cause excessive pre-load. 6
CAUTION
7
Add Loctite adhesive to the inner bearing surface of the
housing and NOT to the bearing race itself. If added to the
race, excessive adhesive could get on the surface of the
outer bearing race journal during installation and cure the
outer cap in place with excessive pre-load. 1 - Press
2 - Plate
5. Using a sleeve and driver (hammer), install the inner
3 - Sleeve
bearing cup.
4 - Press Bearing on Second
6. Put the output shaft and bearing assembly into the 5 - Press Bearing on First
axle housing assembly. 6 - Output Shaft
7 - Plate
52
Cover
10. Bolted rear cover only: If removed, install cover and

fasten with nuts, capscrews and lock washers.
6 Tighten to proper torque specifications. See the
1 Torque Chart.
2 Note: Use Dana approved RTV compound on axle housing

mating surface. Completely remove all old gasket mate-
rial prior to applying new material. Compound will set in
3 20 minutes. Install axle housing cover and output shaft
assembly before compound sets or reapply.
11. Install the output seal.
4
12. Install output yoke.
5 Note: Use of a torque multiplier is recommended.
TIP: If you can't get the correct torque on yoke nut,
try torquing the nut with the truck wheels on the
ground and with the axle shafts installed.
13. Install axle shafts and axle stud nuts (If used, also
install lock washers and taper dowels).
14. Connect inter-axle driveline. Make sure driveline is
properly phased. Lubricate u-joints.
1 - Snap Ring 15. Add axle lubricant. Fill to bottom of filler hole.
2 - Bearing Cup
3 - Output Shaft Assembly
4 - Inner Bearing Cup
IMPORTANT
5 - Rear Cover Assembly
6 - Output Seal When axle has been disassembled or housing, axle shafts
or wheel equipment replaced, check axle assembly for
proper differential actions before operating vehicle. Wheels
must rotate freely and independently.
Road test vehicle to bring axle lubricant up to temperature.
Recheck joints, drain and fill plugs for leakage. Retighten as
necessary.
53
Cover
Measure
Correct endplay for a new assembly is 0.001" to 0.015" [0.03
to 0.38 mm]. The maximum endplay for a used assembly is
no more than 0.015" (0.38 mm). If endplay is incorrect, con-
tact Dana.
1. Install oil seal.
2. Install yoke.
3. Install yoke nut. One of the following options may be
utilized:

a. Install a new nut with the pre-applied thread
adhesive compound. Tighten the nut to the
Rear Cover
specified torque. See the Torque Chart.
b. If a new nut with pre-applied thread adhesive
compound is unavailable, apply Loctite 277 or
271 (available in 0.5 ml tube—Dana P/N
129293) to the nut along two threads, for at
least two flats (120°) of the nut midway through
the thickness (see illustration). Tighten the nut
to the specified torque. See the Torque Chart.
54
Seal - Replace
Replace Seal
Dana strongly recommends using seal drivers when installing
new seals. Use the proper driver to make sure that the seal is
square and installed to the proper depth. CAUTION
Do not use any silicone or permatex-type bore sealant with
this seal.
CAUTION
5. Remove the new seal from its package and install
Oil seals can be easily damaged prior to installation. Use
with the proper driver:
care when handling the new seal to prevent damage or con-
tamination. Leave the seal in its package until installation. D - Input Driver - 210749
On new yokes, leave the protector on the yoke until it is
D - Input Insert - 131472
installed on the shaft to prevent damage or contamination.
D - Output Driver - 131471
1. Inspect axle endplay at the yoke (see page 10). Ser-
vice if beyond specified limit. R - Pinion Driver - 210749
2. Remove the old yoke using appropriate tool. A yoke R - Pinion Insert - 131472
puller tool may be made from the center section of
most gear puller tools, or may be purchased from
your local tool distributor.
WARNING
Due to the resiliency of the plastic driver, hammer rebound
may occur when the seal is seated. Keep clear of the ham-
mer rebound path!
6. Handle the seal by its outside diameter avoiding any
contact with the seal lips. During installation, use the
proper driver to make sure that the seal is mounted
properly.
1 7. Use a rubber mallet to drive the seal tool in until the

flange bottoms on the housing cover bore face. The
flange will locate the seal at the proper depth.
1 - Yoke Puller Tool
3. Remove seal. Use care when removing the old seal

to prevent damage to the housing seal bore.
4. Inspect the seal bore area for any damage (nicks,
gouges, corrosion). Carefully remove any slight
damage with a crocus cloth. Clean the bore area to
remove any loose debris.
55
Seal - Replace
Guidelines for Reusing Yoke
CAUTION
Do not use the yoke if it has any damage on the seal surface
(nicks or scratches).
The surface of the yoke and the lips of the seal form a critical
interface which retains the axle's lubricant while sealing the
axle from outside contaminants. The condition of the yoke
hub's surface is a very important factor in determining seal
life.
Carefully inspect the seal surface area of the yoke hub for
signs of wear and damage. Do not reuse the yoke if there is
noticeable wear, such as heavy grooving, beyond normal pol-
ishing from the seal lips.
Note: Do not rework the yoke with abrasives such as emery
paper or crocus cloth. Clean the surface of the yoke as
necessary using chemical cleaners. Remove all trace of
the chemicals from the yoke after cleaning.
Seal - Replace
CAUTION
Do not use wear sleeves. Wear sleeves increase the yoke
hub surface diameter and cause premature seal wear and
repeat seal failure.
56
Seal - Replace
Service Kit
D-Input D-Output R-Pinion
Location
Tool
210749 210749
131471
131472 131472
57
Housing Breather
Housing Breather
Housing Breather
Dana has an axle breather that consists of a fitting, hose • Plastic only: Tighten until one thread is showing.
and clamp assembly. This breather design has improved
resistance to water ingestion, clogging caused by dirt, ice or
snow buildup around the base of the breather. See installation
instructions below (all views from rear).
1. Install fitting in breather hole.
4. Insert hose onto fitting, long end down.
2. Tighten fitting finger tight.
5. Push hose firmly against fitting. Rotate hose to point

down.
3. Using a 3/4” wrench:
• Metal only: Rotate the fitting at least 1/2 turn until
nipple points to rear.
58
Wheel End Seal
Wheel End Seal - Parts Exploded View
1 - Installation tool
2 - Seal
3 - Rear hub
59
Wheel End Seal
Remove and Overhaul Wheel End Seal

Install Wheel End Seal
WARNING 1. Before installation, lubricate the following with the

same lubricant used in the axle sump.
Never work under a vehicle supported by only a jack.
Always support vehicle with stands. Block the wheels and • Inner bearing
make sure the vehicle will not roll before releasing the • Wheel seal (follow the directions provided by
brakes. the seal supplier)
2. Place seal on installation tool.
IMPORTANT 3. Drive seal with installation tool onto hub.
Wheel End Seal

Wheel end seals can be easily damaged during handling.
Leave the seal in its package until installation to prevent
damage or contamination.
1. Remove outer bearing and wheel.
2. Remove oil seal.
3. Remove inner bearing.
4. Remove old wear sleeve (2-piece design only) with a
ball peen hammer and discard.
CAUTION
Do not cut through the old wear sleeve. Damage to the
housing may result.
5. Inspect spindle journal and hub bore for scratches or

burrs. Recondition with an emery cloth as required.
Note: Deep gouges can be repaired by filling gouge with hard-
ening gasket cement and smoothing with emery cloth.
6. Clean hub cavity and bearing bores before reassem-
bly. Be sure to remove contaminants from all
recesses and corners.
7. Clean bearings thoroughly with solvent and examine
for damage. Replace damaged or worn bearings.
IMPORTANT
Always use the seal installation tool specified by the seal
manufacturer. Using an improper tool can distort or dam-
age the seal and cause premature seal failure.
60
Wheel End Seal
Adjust Wheel Bearing
WARNING CAUTION
Do not mix spindle nuts and lock washers from different Never use an impact wrench to adjust wheel bearings. A
systems. Mixing spindle nuts and lock washers can cause torque wrench is required to assure that the nuts are prop-
wheel separation. erly tightened.
Note: The lock washer for a four-piece tang/dowel-type wheel 8. Back off the inner nut one full turn. Rotate the wheel
nut system is thinner than the lock washer for a three- hub.
piece tang-type wheel nut system and is not designed to
9. Retighten the inner nut to 50 lbs. ft. (68 N•m) while
bear against the inner nut.
rotating the wheel hub.
1. Inspect the spindle and nut threads for corrosion 10. Back off the inner nut exactly 1/4 turn.
and clean thoroughly or replace as required.
Note: This adjustment procedure allows the wheel to rotate
Note: Proper assembly and adjustment is not possible if the freely with 0.001"–0.005" (0.025 mm–0.127 mm)
spindle or nut threads are corroded. endplay.
2. Inspect the tang-type washer (if used). Replace the 11. Install the correct lock washer for the wheel nut sys-
washer the tangs are broken, cracked, or damaged. tem being used.
3. Install the hub and drum on the spindle with care to Three-piece Dowel-type Lock Washer System
prevent damage or distortion to the wheel seal.
CAUTION
A wheel dolly is recommended during installation to make
sure that the wheel seal is not damaged by the weight of the
hub and drum. Never support the hub on the spindle with
just the inner bearing and seal. This can damage the seal 1
2
and cause premature failure. 3
4. Completely fill the hub cavity between the inner and 4
outer bearing races with the same lubricant used in
the axle sump. 1 - Inner Nut
5. Before installation, lubricate the outer bearing with 2 - Dowel Pin
the same lubricant used in the axle sump. 3 - Dowel-type Lock Washer
4 - Outer Nut
Note: Lubricate only with clean axle lubricant of the same type
used in the axle sump. Do not pack the bearings with a. Install the Dowel-type lock washer on the
grease before installation. Grease will prevent the proper spindle.
circulation of axle lubricant and may cause wheel seal
failure. Note: If the dowel pin and washer are not aligned, remove
washer, turn it over and reinstall. If required, loosen the
6. Install the outer bearing on the spindle. inner nut just enough for alignment.
7. Install the inner nut on the spindle. Tighten the inner
nut to 200 ft. lbs. (271 N•m) while rotating the wheel
hub.
61
Wheel End Seal
Four-piece Tang/Dowel-type Lock Washer System
CAUTION
Never tighten the inner nut for alignment. This can preload
the bearing and cause premature failure.
3
b. Install the outer nut on the spindle and 4
tighten to 350 lbs. ft. (475 N•m). 5
c. Verify endplay, see “Verify Wheel Endplay
Procedure.”
2 1
Three-piece Tang-type Lock Washer System
Wheel End Seal

1 - Inner Nut
2 - Dowel Pin
3 - Dowel-type Lock Washer
4 - Tang-type Lock Washer
5 - Outer Nut
1
2 a. Install the Dowel-type lock washer on the
3 spindle.
1 - Inner Nut Note: If the dowel pin and washer are not aligned, remove
2 - Tang-type Lock Washer washer, turn it over and reinstall. If required, loosen the
3 - Outer Nut inner nut just enough for alignment.
a. Install the Tang-type lock washer on the spin-

IMPORTANT
dle.
the bearing and cause premature failure.
CAUTION b. Install the Tang-type lock washer on the spin-

dle.
the bearing and cause premature failure. c. Install the outer nut on the spindle and tighten
to 250 lbs. ft. (339 N•m).
b. Install the outer nut on the spindle and
tighten to 250 lbs. ft. (339 N•m). d. Verify endplay, see “Verify Wheel Endplay
Procedure.”
c. Verify endplay, see “Verify Wheel Endplay
Procedure.” e. After verifying endplay, secure the outer nut
by bending (180° apart) two opposing tangs of
d. After verifying endplay, secure wheel nuts by the locking washer over the outer nut.
bending one of the locking washer tangs over
the outer wheel nut and another tang over the 12. Install the following:
inner wheel nut. • New gasket at axle shaft flange
e. Go to step 12. • Axle shaft
• Axle flange nuts and tighten to specified torque
13. Lubricate axle wheel ends.
62
Wheel End Seal
Verify Wheel Endplay Procedure

Verify that endplay meets specification using a dial indicator. Readjust Wheel Endplay Procedure
An indicator with 0.001" (0.03 mm) resolution is required.
Wheel endplay is the free movement of the tire and wheel
Excessive Endplay—If end-play is greater than 0.005"
assembly along the spindle axis.
(.127 mm), remove the outer nut and pull the lock washer
Correct endplay is 0.001"–0.005" (0.025–0.125 mm). away from the inner nut, but not off the spindle. Tighten the
inner nut to the next alignment hole of the dowel-type washer
1. Attach a dial indicator with its magnetic base to the
(if used). Reassemble the washer and re-torque the outer nut.
hub or brake drum as shown below.
Verify endplay with a dial indicator.
2. Adjust the dial indicator so that its plunger or pointer
is against the end of the spindle with its line of action Insufficient Endplay—If endplay is not present, remove the
approximately parallel to the axis of the spindle. outer nut and pull the lock washer away from the inner nut,
but not off the spindle. Loosen the inner nut to the next
3. Grasp the wheel assembly at the 3 o’clock and
adjustment hole of the dowel-type washer (if used). Reassem-
9 o’clock positions. Push the wheel assembly in and
ble the washer and re-torque the outer nut. Verify endplay
out while oscillating it to seat the bearings. Read
with a dial indicator.
bearing endplay as the total indicator movement.
Fine Tuning the Endplay—If, after performing the readjust-
ment procedures, endplay is still not within the 0.001"–0.005"
CAUTION (0.025–0.127 mm) range, disassemble and inspect the com-
ponents. If parts are found to be defective, replace the defec-
If endplay is not within specification, readjustment is tive parts, reassemble and repeat wheel bearing adjustment
required. procedure. Verify endplay with a dial indicator.
63
Wheel End Seal
Lubricate Wheel End
Wheel Ends with an Oil Fill Hole

CAUTION 1. Rotate the wheel end hub until the oil fill hole is up.
Before operating the axle, the wheel hub cavities and bear- 2. Remove the oil fill plug.
ings must be lubricated to prevent failure.
3. Pour 1/2 pint of axle sump lubricant into each hub
When wheel ends are serviced, follow Dana’s wheel end through the wheel end fill hole.
lubrication procedure before operating the axle.
4. Install oil fill plug and tighten to specified torque.
Dana axles may be equipped with either of two wheel end
designs: 1
Wheel End Seal

• Wheel ends with an oil fill hole.
• Wheel ends without an oil fill hole.
1 - Wheel End Oil Fill Hole

2 - Proper Lubricant Level
3 - Lubricant Flow from Sump
64
Wheel End Seal
Wheel Ends Without Oil Fill Hole

5. Lower the left side.
1. With axle level and wheel ends assembled, add lubri-
cant through filler hole in axle housing cover until 6. With axle on a level surface, add lubricant through
fluid is level with the bottom of filler hole. housing cover oil filler hole until fluid is level with the
bottom of the hole.
2. Raise the right side of the axle 6 " or more. Hold axle
in this position for one minute. Note: Axles without wheel end fill holes will require approxi-
3. Lower the right side. mately 2.5 additional pints of lubricant to bring the lube
level even with the bottom of fill hole.
4. Raise the left side of the axle 6 " or more. Hold axle in
this position for one minute.
1 3 4
1 - With axle on level surface, fill housing with oil to bottom of plug
2 - Temperature sensor mounting hole
3 - Oil will run into wheel end
4 - Oil will run into wheel end
5 - Tilt housing side to side (1 minute per side)
6 - Recheck oil level in axle
65
Lubrication
General Lubrication Information

The ability of a drive axle to deliver quiet, trouble-free opera- Makeup Lube—Maximum amount of non-synthetic makeup
tion over a period of years is largely dependent upon the use lube is 10%. For additional lubrication information, see
of good quality gear lubrication in the correct quantity. The TCMT-0021.
most satisfactory results can be obtained by following the
directions contained in this manual.
Recommendations for Viscosity/Ambient
The following lubrication instructions represent the most cur-
rent recommendations from the Axle & Brake Division of Dana Temperature
Corporation.
The following chart lists the various SAE Grades covered by
MIL-L-2105D and the associated ambient temperature range
Approved Lubricants from each. Those SAE grades shown with an asterisk (*) are
available in the Roadranger family of synthetic gear lubri-
General—Gear lubrications acceptable under military specifi- cants.
cation (MILSPEC) MIL-L-2105D (Lubricating Oils, Gear,
Multipurpose) are approved for use in Dana Drive Axles. The The lowest ambient temperatures covered by this chart are
MIL-L-2105D specification defines performance and viscosity -40°F and -40°C. Lubrication recommendations for those
requirements for multigrade oils. It supersedes both applications which consistently operate below this tempera-
MIL-L-2105B, MIL-L-2105C and cold weather specification ture range, must be obtained through Dana Corporation by
MIL-L-10324A. This specification applies to both petroleum- contacting your local Dana representative.
based and synthetic based gear lubricants if they appear on
Grade Ambient Temperature Range
the most current “Qualified Products List” (QPL-2105) for
MIL-L-2105D. 75W -40°F to -15°F (-40°C to -26°C)
Note: The use of separate oil additives and/or friction modifi- 75W-90* -40°F to 100°F (-40°C to 38°C)
Lubrication
ers are not approved in Dana Drive Axles.
75W-80 -40°F to 80°F (-40°C to 21°C)
Synthetic based—Synthetic-based gear lubricants exhibit 75W-140 -40°F and above (-40°C and above)
superior thermal and oxidation stability, and generally
80W-90 -15°F to 100°F (-26°C to 38°C)
degrade at a lower rate when compared to petroleum-based
lubricants. The performance characteristics of these lubri- 80W-140* -15°F and above (-26°C and above)
cants include extended change intervals, improved fuel econ-
85W-140 10°F and above (-12°C and above)
omy, better extreme temperature operation, reduced wear and
cleaner component appearance. The family of Dana * Available in the Roadranger family of synthetic gear
Roadranger™ gear lubricants represents a premium quality lubricants.
synthetic lube which fully meets or exceeds the requirements
of MIL-L-2105D. These products, available in both 75W-90
and 80/W-140, have demonstrated superior performance in
comparison to others qualified under the MILSPEC, as dem-
onstrated by extensive laboratory and field testing. For a com-
plete list of Roadranger® approved synthetic lubricants
contact your local Dana representative. See back cover of this
manual for appropriate phone number.
66
Lubrication
Lube Change Intervals

This product combines the latest manufacturing and part Severe Service Lubrication Change Intervals—Severe ser-
washing technology. When filled with an Dana approved vice applications are those where the vehicle consistently
synthetic lubricant at the factory, the initial drain is not operates at or near its maximum GCW or GVW ratings, dusty
required. or wet environments, or consistent operation on grades
greater than 8%. For these applications, the ON/OFF HIGH-
Change the lubricant within the first 5,000 miles of opera- WAY portion of the chart should be used. Typical applications
tion when not using a Roadranger approved synthetic lubri- are construction, logging, mining and refuse removal.
cant in either a new axle or after a carrier head
Note: Clean metallic particles from the magnetic filler plug
replacement. Base subsequent lubricant changes on a com-
and drain plugs. Clean or replace the breather yearly to
bination of the following chart and user assessment of the
avoid lube contamination due to water ingestion.
application and operating environment.
GUIDELINES - LUBE CHANGE INTERVALS FOR DRIVE AXLES
Lubricant Type On Highway Maximum Change On/Off Highway Maximum Change
Miles Interval Severe Service Miles Interval
Mineral Based 100,000 Yearly 40,000 Yearly
Dana Approved Synthetic 250,000 3 Years 100,000 Yearly
For additional lubrication information, see TCMT-0021.
67
Lubrication
Change Lube
Drain Always use the filler hole as the final reference. If lube is level
with the bottom of the hole, the axle is properly filled.
Drain when the lube is at normal operating temperature Note: Lube fill capacities (see chart) are basic guidelines and
(150°–200°F). It will run freely and minimize the time neces- will vary based on the angle the axle is installed in a par-
sary to fully drain the axle, this insures the axle is flushed. ticular chassis. Torque fill plug to 40–60 lbs. ft.
(54–82 N•m).
Unscrew the magnetic drain plug on the underside of the axle
housing and allow the lube to drain into a suitable container. TIP: The axle can be filled through the axle housing breather
hole. Fill until lube level is even with the bottom of filler hole in
Note: Dispose of all used lubricants properly by following dis-
posal methods approved for mineral or synthetic based axle housing rear cover.
oils.
After initial oil change, inspect drain plug for large quantities
of metal particles. These are signs of damage or extreme wear
in the axle. Clean the drain plug and replace it after the lube
has drained completely. Inspect breather for clogging or cor-
rosion. Clean or replace as necessary.
Fill
1 - With axle on level surface, fill housing with oil to bottom
Front Axle of plug
2 - Temperature sensor mounting hole
Lubrication
a. With vehicle on level ground, remove the filler hole
plug from the axle housing cover and fill the axle
with approved lubricant until level with the bottom of
the hole.
Rear Axle
a. Remove the filler hole plug from the axle housing
cover and fill the axle with the approved lubricant
until level with the bottom of the hole.
b. If wheel ends were removed, follow instructions in
wheel end servicing section.
Correct lube level at bottom of filler hole.
68
Lubrication
Standpipes
Drive axles are lubricated with oil drawn from a large sump
integral to the assembly. Most axle designs attempt to posi-
tion vital components such as pinion bearings in close prox-
imity to this sump, keeping them bathed in a generous supply D190
of oil at all times. Axle Installation Axle Location Quantity
When drive axles are installed at severe angles in vehicle Angle (pints)
chassis, the position of these components is changed relative 12° Rear 29*
to the oil sump. The same effect is present when the vehicle
travels up a steep grade. Oil in the sump remains level while 10° Rear 30*
the axle itself tilts up or down. This makes it possible for bear- 8° Rear 31
ings and gears located well forward in the assembly to "starve"
for lubrication even though the axle is filled to the base of the 6° Forward 42.5
fill plug hole as recommended by the manufacturer. Rear 32
Axles should be modified with standpipes to raise lube levels 4° Forward 44.5
whenever chassis installation angles exceed 10° and when the Rear 33.5
vehicle must negotiate continuous or lengthy grades on a rou- 2° Forward 47
tine basis. Rear 35
The chart gives standpipe recommendations for vehicles 0° Forward 50
operating in consistently mountainous areas. Rear 36
*Does not allow for standpipe.

D170 Capacities do not include wheel equipment requirements.
Axle Installation Axle Location Quantity An additional 1-2 pints is required in each wheel hub.
Angle (pints)
12° Rear 29*
Tandem Forward Axles
10° Rear 30*
Installation 5-10% 10-15% 15-20%
8° Rear 31 Angle* Grade Grade Grade
6° Forward 39 0° – – –
Rear 32
3° – – 2.00"
4° Forward 41
Rear 33.5 5° – 1.00" 2.25"
2° Forward 43 7° – 1.25" 2.50"

Rear 35 10° 1.50" 1.75" 2.75"
0° Forward 45 13° 1.75" 2.00" 3.00"
Rear 36
15° 2.50" 2.50" 3.25"
*Does not allow for standpipe.
Capacities do not include wheel equipment requirements.
An additional 1-2 pints is required in each wheel hub.
69
Lubrication
12° Installation
Tandem Rear Axles

Installation 5-10% 10-15% 15-20%
Angle* Grade Grade Grade
0° – – –
3° – – 1.00" 2
1
5° – 1.00" 1.75"
7° – 1.75" 2.00"
1 - Oil Filler Hole
10° – 2.00" 2.25" 2 - Lost Oil Capacity
13° 1.00" 2.25" 2.75"
15° 2.00" 2.50" 3.25"
12° Installation with Standpipe
*Pinion pointing upward
Horizontal Mounting
Lubrication
2
1
1 - Oil Filler Hole

2 - Additional Oil Capacity
2
1
Note: Grades must be continuous or lengthy in nature. Moni-
tor oil temperatures before installing standpipes. Axles
should operate at approximately 100°F (38°C) over
1 - Oil Filler Hole
ambient temperature and not exceed 240°F (116°C).
2 - Lost Oil Capacity
Final Check
Prior to putting vehicle back into service, run the vehicle to
bring axle lube up to temperature. Check filler and drain plugs
and axle joint for leakage. Re-tighten to specifications as nec-
essary.
70
Towing Guide
Proper Vehicle Towing

Without Wheel Differential Lock With Wheel Differential Lock
Follow this procedure to remove all axle shafts preventing
Lift the drive wheels completely off of the ground or damage
gear rotation with the drive wheels and possible lubrication
will occur.
damage:
1. Engage the wheel differential lock, indicator light is
on (move vehicle to verify engagement).
WARNING
2. Shift transmission into neutral.
Do not lift the front wheels (non-drive wheels). This alters
the oil’s position in the drive axle, draining it away from the 3. With vehicle stationary, release the air pressure on
drive pinion and its bearings. If the pinion is rotated under the wheel differential lock shift system and apply the
these conditions for any period of time, bearings will over- parking brake.
heat resulting in axle damage or failure. 4. Disconnect the air supply and fitting at the shift
If it is impossible to lift the drive wheels, remove all axle cylinder.
shafts to prevent gear rotation and cap the wheel hubs to pre- 5. Remove the axle shafts.
vent loss of lubricant and a possible road hazard. See the fol-
lowing section Proper Vehicle Towing with Wheel Differential 6. Install temporary cover on hub to prevent contami-
Lock for removal procedure. nation entering and also to prevent the loss of lubri-
cant.
71
Theory of Operation
Power Divider Operation (Power Flow and Torque Distribution)

In operation, the power divider accepts torque from the vehi- The inter-axle differential compensates for minor variations in
cle driveline and distributes it equally to the two axles. speed between the two axles, the same way the wheel differ-
ential works between the two wheels of a single drive axle.
This assembly is of the two-gear design consisting of an input This unit also acts as a central point in distribution of torque
shaft, inter-axle differential, output shaft and two constant- to the two axles.
mesh helical gears.
The power divider also includes a driver-controlled, air-oper-
ated lockout. When lockout is engaged, it mechanically pre-
With Lockout Engaged vents inter-axle differentiation for better performance under
(Inter-Axle Differential is Operating) poor traction conditions.
Theory of Operation
1
2
5
3
1 - Input torque 4 - Rear axle torque is transmitted from the output shaft side
2 - Lockout disengaged gear through the output shaft, inter-axle driveline, drive
3 - Forward axle torque is transmitted from the helical side pinion, ring gear, wheel differential and axle shafts.
gear through the pinion helical gear, drive pinion, ring gear, 5 - Input torque (power flow) from the vehicle driveline is
wheel differential and axle shafts. transmitted to the input shaft and the inter-axle differential
spider. The differential distributes torque equally to both
axles.
72
Theory of Operation
With Lockout Engaged Note: Varied road surface conditions can result in unequal
(Inter-Axle Differential is Not Operating) torque distribution between the two axle assemblies.
Lockout should only be engaged when both axles are rotating
at the same speed. Operation should be limited to low-traction
situations and should be disengaged when normal traction CAUTION
returns. Failure to do so will result in poor handling and dam-
age to the axle components. Prolonged operation with the lockout engaged can damage
axle and driveline components.
1
2
5
3
1 - Input torque 4 - Rear axle torque is transmitted from the output shaft side
2 - Lockout engaged gear through the output shaft, inter-axle driveline, drive
3 - Forward axle torque is transmitted from the helical side pinion, ring gear, wheel differential and axle shafts.
gear through the pinion helical gear, drive pinion, ring gear, 5 - Input torque (power flow) from the vehicle driveline is
wheel differential and axle shafts. transmitted directly to the helical side gear and the output
shaft. A positive drive is provided to both axles for
maximum traction under adverse road conditions.
73
Theory of Operation
Operate Wheel Differential Assembly

The Dana wheel differential lock is driver-controlled and oper- Direct Driver-controlled System
ated by a carrier mounted air-actuated shift unit. In operation,
The driver manually locks and unlocks the wheel differential,
it positively locks the wheel differential to provide improved
using a cab-mounted electric switch (or air valve). The follow-
traction under adverse road conditions.
ing description assumes the system includes a cab-mounted
electric switch and a solenoid valve as shown in the illustra-
Control Systems for Differential Lock tion. An air valve may be substituted for these components.
Operation is as follows:
Two systems may be used to control the differential lock
operation. 1. With control switch in the “unlock” position, the
wheel differential functions normally.
Transmission Low Range Interlock Control System
Theory of Operation
2. When the control switch is placed in the “lock” posi-
The wheel differential is locked manually with the transmis-
tion, the air supply solenoid valve opens and air
sion in Low Range. It is unlocked by the driver or unlocked
pressure activates the shift cylinder. The shift fork is
when the transmission is shifted out of Low Range.
moved to engage the curvic clutches, which, in turn,
Note: The interlock system is preferred for vehicles equipped lock the wheel differential.
with an air-shifted, Low Range transmission. It is
3. When the control switch is placed in the “unlock”
designed to ensure the differential lock is not left
position, air pressure supply to the shift cylinder is
engaged (and to prevent accidental engagement) when
shut off and air pressure is released from the cylin-
transmission is in high range.
der. A compression spring moves the shift fork to
disengage the curvic clutch and unlock the wheel dif-
ferential.
74
Theory of Operation
Direct Driver-controlled System
2
10
6 5 5 6
4 3 4
7 7
9 8
1 - Cab-mounted control valve (plunger in—valve open) 7 - Wheel differential lock indicator switch
2 - Dry air supply tank 80–120 PSI (part of axle assembly)
3 - Preferably equal in length - Airline 8 - Rear axle wheel differential lock air shift cylinder
4 - Power supply 9 - Forward rear axle wheel differential lock air shift cylinder
5 - Fuse or circuit breaker 10 - 66468 Quick release valve (optional) located on frame rail
6 - Indicator light or audible signal and within 10 feet of tubing from control valve
75
Theory of Operation

The Dana Wheel Differential Lock is an optional feature for The wheel differential lock consists of three major assemblies.
Dana Axles. In operation, it positively locks the wheel differen-
• Shift Cylinder Assembly: Operates a shift fork and
tial, to provide improved traction under adverse road condi-
push rod assembly.
tions.
• Shift Fork and Push Rod Assembly: Engages and
The differential lock is driver-controlled through an electric
disengages the differential lock curvic clutch assem-
switch or air valve mounted in the cab. The locking mecha-
bly.
nism is air-operated to engage a mechanical clutch and lock
the wheel differential. It is spring-operated to disengage the • Curvic Clutch Assembly: Consists of a sliding clutch
lock and permit the wheel differential to function normally. splined to a axle shaft and a fixed clutch which is
splined to the differential case hub.
Theory of Operation
The differential lock also includes a selector switch (electric)
which senses clutch engagement and sends an electrical sig-
nal to a cab mounted indicator light (or an audible signal
device).
1
9
4
5 2
6
7
8
10
1 - Sliding clutch 5 - O-ring 9 - Pin

2 - Spring 6 - Piston cover 10 - Carrier
3 - Clutch fork 7 - Washer
4 - Piston and rod 8- Switch
76
Theory of Operation
Differential Lock Engaged Differential Lock Disengaged

Air pressure applied to the shift cylinder moves the piston, When air pressure at the shift cylinder is released, a compres-
push rod, shift fork and the sliding curvic clutch engages the sion spring (mounted on the push rod) moves the push rod,
fixed curvic clutch. shift fork and sliding clutch as an assembly. The sliding clutch
moves out of engagement with the fixed clutch. The wheel dif-
The sliding clutch is splined to the axle shaft. The fixed clutch
ferential is unlocked and operates normally.
is splined to the differential case hub. Engaging the two
clutches locks the wheel differential thus preventing wheel dif-
ferential action.
5
4
5 3
1 2
4
1 3
2
6 7
6 7 Differential Lock Disengaged

1 - Spring is decompressed
Differential Lock Engaged
2 - Shift fork
1 - Spring is compressed
3 - Piston and rod
2 - Shift fork
4 - Selector switch
3 - Piston and rod
5 - Air pressure released disengages clutches
4 - Selector switch
6 - Fixed clutch splined to differential case
5 - Air pressure applied engages clutches
7 - Sliding clutch splined to axle shaft
6 - Fixed clutch splined to differential case
7 - Sliding clutch splined to axle shaft and engaged with
Differential Lock Engagement Indicator
fixed clutch
Differential lock engagement is detected by a switch (electric)
mounted on the differential carrier. An actuator, mounted in
the piston cover, operates the switch.
When the shift fork moves to engage the differential lock, the
push rod actuator moves away from the switch, allows the
switch to close and send an electrical signal to turn on a cab-
mounted indicator light (or an audible signal).
When the shift fork moves to disengage the differential lock,
the compression spring also moves the push rod actuator to
contact the switch. The switch is opened and turns off the
cab-mounted indicator light (or the audible signal).
77
Power Divider - Parts Exploded View
1
2
44
3
4
5
6
7 High Entry Input
8 Shaft Assembly
19
20
9
21
22 27
10
25
14
26 15 16
28 11 17
29
18
30 12
23 31 32
11
24
33 13
34
35
43 36
42 37
41 38
39
40
1 - Output shaft nut 15 - Output side gear bearing cone 29 - Carrier housing
2 - Output yoke 16 - Pin 30 - Locking capscrew
3 - Output seal 17 - Output side gear 31 - Input cover
4 - Output shaft bearing snap ring 18 - Pump 32 - Input cover capscrew
5 - Outer bearing cup 19 - Inter-axle differential 33 - Bearing cup and cage
6 - Outer bearing cone 20 - Helical side gear 34 - Input seal
7 - Inner bearing cone 21 - Thrust washer 35 - Input yoke
8 - Inner bearing cup 22 - Lockout sliding clutch 36 - Input nut
9 - Output shaft 23 - Shift fork spring 37 - Piston
10 - Seal manifold 24 - Shift fork assembly 38 - O-ring
11 - Clamp 25 - V-ring 39 - Piston cover
12 - Seal manifold feed tube 26 - Input shaft 40 - Pinion cover
13 - Sump screen 27 - Input shaft 41 - Input cover capscrew
14 - Output side gear bearing cup 28 - Input shaft bearing cone 42 - Input cover
43 - Carrier housing
78
Forward Axle Pinion Assembly - Parts Exploded View
2
1
3
2 4
5
6
7
8
9
1 - Pinion pilot bearing 4 - Pinion bearing cup - inner 7- Pinion bearing cup - outer
2 - Pinion 5 - Pinion helical gear 8 - Pinion bearing cone - outer
3 - Pinion bearing cone - inner 6 - Pinion bearing spacer 9 - Pinion nut
79
Rear Axle Pinion Assembly - Parts Exploded View
2
3
4
1 5
6
2
7
8
9
10
1 - Pinion pilot bearing 5 - Pinion bearing spacer 9 - Yoke

2 - Pinion 6 - Pinion bearing cup - outer 10 - Pinion nut
3 - Pinion bearing cone - inner 7 - Pinion bearing cone - outer
4 - Pinion bearing cup - inner 8 - Oil seal
80
Wheel Differential Lock - Parts Exploded View
1
9
4
5 2
6
7
8
1 - Sliding clutch 4 - Piston and rod 7 - Washer

2 - Spring 5 - O-ring 8 - Switch
3 - Clutch fork 6 - Piston cover 9 - Pin
81
Housing and Output Shaft Assembly - Parts Exploded View
1
2
3
4
5
6
7
8
10
11
21
12 19 20
13
14
15
22
17 18 25
24
16 23
26
Welded Rear Cover
27
1 - Output shaft nut 10 - Rear cover 19 - Axle housing

2 - Output yoke 11 - Rear cover capscrew 20 - Breather
3 - Output seal 12 - Fill plug 21 - Breather hose
4 - Snap ring 13 - Rear cover nut 22 - Carrier capscrew
5 - Outer bearing cup 14 - Washer 23 - Nut
6 - Outer bearing cone 15 - Stud 24 - Washer
7 - Inner bearing cone 16 - Spindle nut - Outer 25 - Stud
8 - Inner bearing cup 17 - Locking ring 26 - Drain plug
9 - Output shaft 18 - Spindle nut - Inner 27 - Axle shaft
82
Fastener Torque Specifications
Fastener Torque Specifications

Location Size Lbs. Ft. N•m
POWER DIVIDER
Input Cage Locking Bolt M8 x 1.0 x 30 20 + 5 25 + 5
IAD Shift End Cap 2.375 - 16 UN-2A 65 + 10 85 + 15
Power Divider Cover Capscrews M14 x 1.5 x 45 175 + 10 235 + 10
Input Shaft Nut M48 x 1.5 900 + 100 1220 + 135
WHEEL DIFFERENTIAL AND GEARING
Front Pinion Helical Nut M48 x 1.5 900 + 100 1220 + 135
Output Shaft Nut M42 x 1.5 900 + 100 1220 + 135
Rear Pinion Nut M48 x 1.5 900 + 100 1220 + 135
Ring Gear, Diff. Case Bolts M20 x 1.5 x 55 500 + 25 675 + 30
CARRIER
Carrier Diff. Bearing Cap M18 x 1.5 x 85 265 + 15 360 + 20
Carrier to Housing Capscrews M16 x 1.5 x 85 250 + 15 335 + 20
M16 x 1.5 x 55 250 + 15 335 + 20
Carrier to Housing Nuts M16 x 1.5 250 + 15 335 + 20
Pilot Bearing Web M16 x 1.5 x 70 210 + 10 285 + 15
Differential Lock Switch M14 x 1.5 10 + 1 15 + 3
Differential Lock End Cap 2.375 - 16 UN-2A 65 + 10 85 + 15
HOUSING
Rear Cover Capscrews M16 x 1.5 x 70 250 + 15 335 + 20
M16 x 1.5 x 55 250 + 15 335 + 20
Rear Cover Nuts M16 x 1.5 250 + 15 335 + 20
Magnetic Plug (Fill) 1 x 11.5 NPTF 50 + 5 72 + 5
Drain Plug 0.750 - 14 NPTF 50 + 5 72 + 5
Housing Breather 0.375 - 18 NPTF 20 - 26 27 - 35
Temperature Sending Plug 0.500 - 20 NPTF 50 + 5 72 + 5
Axle Shaft to Wheel Hub Nut 0.625 - 18 180 + 10 245 + 15
0.750 - 16 315 + 30 425 + 40
Wheel Diff. Lock Caps 2.37-16UN 2A 65 + 10 85 + 15
83
This page intentionally left blank.
Copyright Eaton and Dana Corporation,
2004. EATON AND DANA CORPORATION
hereby grants its customers, vendors, or
distributors permission to freely copy,
reproduce and/or distribute this document
in printed format. THIS INFORMATION IS
The Roadranger® System is an unbeatable combination of the best
NOT INTENDED FOR SALE OR products from Eaton and Dana – partnering to provide you the most
RE-SALE, AND THIS NOTICE MUST advanced, most trouble-free drivetrain in the industry. And it's
backed by the Roadrangers – the most experienced, most expert,
most accessible drivetrain consultants in the business. Visit our web
site at www.roadranger.com. For spec'ing or service assistance,
call 1-800-826-HELP (4357) 24 hours a day, 7 days a week,
(Mexico: 01-800-826-HELP (4357)) for more time on the road.
AXSM-0057
Printed in USA

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Dana® Spicer ® Steer Axles

This symbol is used throughout this WARNING: Failure to follow indicated

Tip: Helpful removal and installation

Always use genuine Dana replacement parts.

Introduction ........................................................1 Remove Output Shaft Assembly .......................50

Gear Type Design Level

1 - Country or origin 4 - OEM part number assigned to the axle build

1 - ID Tag 2 - Axle shaft part number

Ring Gear and Pinion

Make a Preliminary Investigation Find the Cause of the Failure

Prepare the Parts for Inspection

Endplay Procedure Check Output Shaft Endplay (Forward Axle)

Differential Carrier Assembly - Parts

Remove Differential Carrier - (Forward and Rear)

Do not lie under carrier after fasteners are removed. Use

Install Differential Carrier (Forward and Rear)

Before installing carrier assembly, inspect and thoroughly

Tip: To assist in installing complete differential car-

IAD Differential Lock Disassembly

Inter-Axle Lockout Disassembly

Power Divider - Parts Exploded View

1 - Output shaft nut 16 - Pin 31 - Input cover

Power Divider Disassembly - Forward Carrier Assembly

6. Remove the input seal.

11. Remove the inter-axle differential assembly.

12. Remove the output side gear and pump assembly.

15. Use a suitable bearing puller to replace the input

4. Remove the output side gear bearing cup from the

2. Remove pump locking dowel pin from the hole in the

Lube Manifold Disassembly

Once removed, the seal manifold assembly cannot be

Note: Seals are not sold separately from the manifold.

1 - Manifold Oil Inlet Hole

5. Attach the suction screen to the end of the hose.

2. Install the hose clamp on the hose, push the hose

If the unit contains a pump, go to the Pump Assembly section.

4. Fully press the manifold assembly into position.

During installation of power divider cover, the inter-axle

Power Divider Assembly

5. Install the helical side gear so that the clutch teeth

When inserting the input shaft assembly through the IAD

4. Install the inter-axle differential.

15. Install input shaft bearing adjuster, adjust inward

1 - Round Tipped Chisel 3

20. Install input shaft flanged nut and torque to the

Carrier Disassembly - Forward Carrier Assembly

3. Remove the piston push rod from the shift fork.

Note: Omit this step if the ring gear is to be replaced. If the

1 - Threaded bearing cup

2. If a pilot web is used, remove the web capscrews.

3. Before the pinion nut can be loosened, you must de-

4. To de-stake the nut, use a chisel or drift with a round

7. Use the proper pressing tool to press the end of the

8. Forward Axles Only: Remove the pinion spacer and

The bearing spacer will be reused or used as a starting

Forward Axle Pinion Assembly - Parts Exploded View

Rear Axle Pinion Assembly - Parts Exploded View

1 - Pinion pilot bearing 5 - Pinion bearing spacer 9 - Yoke

b. Mount the puller horizontally to press the