Lycoming Aircraft Engines

Parts Catalog

O-540-A Series
Standard Cylinder Flange Crankcase Models

652 Oliver Street

Part No. PC-115-1 Williamsport, PA 17701
 WilliamsportPlant 652 Oliver Street
Textron Lycoming/Subsidiary of Textron Inc Williamsport. PA 17701 U.S.A
717/323-6181

TECHNICAL
PUBLICATION REVISION
REVISION No. ENGINE MODEL PUBLICATION No. PUBLICATION DATE
PC-115-1A 0-540-A Series PC-115-1 March, 1991
Std. Cyl. Flange Crankcase

The page(s) furnished herewith are intended to replace the corresponding

page(s) of the publication indicated above.

Remove Insert
I
March, 1991 October, 1991

6-1, 6-2 5-9, 5-10, 6-1, 6-2

 Lycoming Aircraft Engines
Parts Catalog

O-540-A Series
Standard Cylinder Flange Crankcase Models

652 Oliver Street

Part No. PC-115-1 Williamsport, PA 17701
 TEXTRON Lycoming 0-540-A SERIES PARTS CATALOG
STANDARD CYLINDER FLANGE CRANKCASE MODEL ENGINES
Williamsport Plant
INTRODUCTION
This illustrated parts catalog contains a complete parts listing for the Lycoming 0-540-A Series standard cylinder
flange crankcase model aircraft engines.

Major assembly and sub-assembly parts of the engines are listed in the Group Assembly sections in the general
sequence of engine build up.

A Service Kits section and Oversize and Undersize Parts List are included to aid in ordering parts as necessary
during overhaul.

The Numerical Index is provided for convenience in finding parts when only the part number is known.

Parts coverage of Vendor Accessories used on Lycoming engines may be found in the appropriate Vendor's
Parts Catalog. A list of addresses of where to obtain these publications appears in the latest edition of Service
Letter No. L114.

NOTE
The illustrations, pictures and drawings shown in this publication are typical of the subject matter they
portray.

This catalog, when used in conjunction with the appropriate overhaul manual, shall be used for parts identification only.
Under no circumstances shall this catalog be used as an assembly or installation document.

Any reference in this document to a suppliers/parts manufacturers' product, by name, trademark, part number or
other description is solely for the purposes of identification and does not indicate or infer that Lycoming accepts
responsibility for quality control and/or airworthiness of parts which do not pass through the Lycoming quality
control system.

All Lycoming publications will bear the copyright notice Lycoming 1986,
"All Rights Reserved", and all Lycoming publications are to be considered
copyrighted and may not be reproduced without permission of the
company.

SERVICE BULLETINS, INSTRUCTIONS AND LETTERS

Although the information contained in this parts catalog is up-to-date at time of publication, users are advised to
procure current information through all Lycoming distributors or from the factory by subscription. Consult the latest
edition of Service Letter No. L114 for subscription information.

HOW TO ORDER PARTS

In ordering parts for your engine, observe the following instructions which will expedite shipment of correct parts
required without delay.

a. Always specify the model and serial number of your engine.

b. Always specify Part Number, Nomenclature and quantity required.

i
TEXTRON Lycoming 0.540-A SERIES PARTS CATALOG
STANDARD CYLINDER FLANGE CRANKCASE MODEL ENGINES
Williamsport Plant
TABLE OF CONTENTS
SECTION PAGE
Introduction................................................................................................................................................................................
Table of Contents ....................................................................................................................................................................... ii
Oversize and Undersize Parts Listing ..................................................................................................................................... iii
1. CRANKCASE, CRANKSHAFT AND CAMSHAFT GROUP
Crankcase Assembly ........................................................................................................................................................... 1-1
Oil Level Gages and Engine Mounting Brackets ............................................................................................................. 1-3
Crankcase Related Parts .................................................................................................................................................... 1-5
Crankshaft and Related Parts ........................................................................................................................................... 1-7
Camshaft and Related Parts .............................................................................................................................................. 1-9
Propeller Governor Drive Assembly ............................................................................................................................... 1-10
Crankshaft Idler Gears .................................................................................................................................................... 1-11
Crankcase Attaching Parts .............................................................................................................................................. 1-13
2. ACCESSORY HOUSING AND RELATED PARTS
Accessory Housing Assembly ............................................................................................................................................. 2-1
Oil Pump Assembly and Accessory Housing Attaching Parts ........................................................................................ 2-2
Fuel Pump Assembly and Attachments ............................................................................................................................ 2-3
Oil Pressure Screen, Oil Filter and Oil Cooler Bypass Valve ......................................................................................... 2-4
Vacuum Pump Drive, Oil Cooler and Breather Fittings ................................................................................................. 2-6
Hydraulic Pump Drive, Cover and Attachments ............................................................................................................. 2-8
3. CYLINDER, PISTON AND VALVE TRAIN
Connecting Rods, Pistons and Ring Assemblies............................................................................................................... 3-1
Cylinder Assembly ............................................................................................................................................................. 3-3
Valve Assembly and Related Parts.................................................................................................................................... 3-5
Cylinder Related Parts ....................................................................................................................................................... 3-7
Cylinder Head Drain Tubes, Intercylinder Cooling Baffles and Related Parts ............................................................ 3-9
4. IGNITION SYSTEM
Bendix Magnetos and Magneto Drives ............................................................................................................................. 4-1
Ignition Harnesses and Attachments For Bendix Magnetos ........................................................................................... 4-3
Slick Magnetos, Harnesses, Drives and Spark Plugs ....................................................................................................... 4-5
Bag - Magneto Harness Attaching .................................................................................................................................... 4-7
Bag - Magneto Harness Attaching .................................................................................................................................... 4-8
5. ELECTRICAL COMPONENTS
Prestolite Starters and Attaching Parts ............................................................................................................................ 5-1
Lycoming Light Weight Starter and Attaching Parts ..................................................................................................... 5-2
Alternator Assemblies and Belts ....................................................................................................................................... 5-3
Alternator Mounting and Attaching Parts ....................................................................................................................... 5-5
Alternator Mounting and Attaching Parts ....................................................................................................................... 5-7
6. OIL SUMP AND INDUCTION SYSTEM
Oil Sump Assembly and Attachments............................................................................................................................... 6-1
Intake Pipes and Attachments ........................................................................................................................................... 6-3
Priming System ................................................................................................................................................................... 6-4

7. SERVICE KIT SECTION ................................................................................................................................................ ,7-1

8. NUMERICAL INDEX ....................................................................................................................................................... 8-1

ii
TEXTRONLycoming SERIES
0-540-A CATALOG
PARTS
STANDARD FLANGE
CYLINDER MODEL
CRANKCASE ENGINES
WilliamsportPlant
Oversize and UndersizeParts Listing
PART NO. DESCRIPTION OVERSIZE UNDERSIZE
P02 P05 P10 P15 P20 P30 P40 P50 M03 M06 M10
.002 .005 .010 .015 .020 .030 .040 .050 .003 .006 .010
61681 GUIDE SEELATEST
EDITION
OFSERVICE
INSTRUCTION
NO.1256
FOR
APPLICATION.
66610 BUSHING
66796 INSERT
69796 DOWEL
71903-A,-B BUSHING SEELATEST
EDITION INSTRUCTION
OFSERVICE NO.1143 APPLICATION.
FOR
72057 SEAT
72058 SEAT
72060-S BUSHING
72061-S BUSHING
72062-S BUSHING
72074-S BUSHING
73810 BUSHING SEELATEST OFSERVICE
EDITION INSTRUCTION FOR
NO.1142 APPLICATION.
74230 GUIDE SEELATEST OFSERVICE
EDITION NO.1256
INSTRUCTION APPLICATION.
FOR
LW-10647 DOWEL
LW-11021 BEARING
LW-11997 SEAL SEELATEST
EDITION INSTRUCTION
OFSERVICE NO.1324 APPLICATION.
FOR
LW-13521 BEARING
LW-13522 BEARING
LW-13792 SEAL SEELATEST
EDITION
OFSERVICE
INSTRUCTION
NO.1324
FOR
APPLICATION.
LW-13884 BEARING
LW-16047 BEARING
LW-16048 BEARING
STD-1065 DOWEL
18A19441 BEARING
18D19394 BEARING

*Also availablein P10oversize.

In additionto theabove,studsareavailablein P01,P02,P03,P05,P07,P10& P12.

NOTE

Whenorderingoversizeand undersize parts,besureto specifytherequiredoversize dimension

and undersize alongwiththeproperpart
number.Forexample, toorderbearingLW-13884 in.003undersize,orderpartnumberLW-13884-M3. codeletteris "P" whileundersize
Oversize
codeletteris "M". Theselettersarethenfollowedby the numberdesignating of an inch.
the sizein thousandths

iii
 Lycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport Plant CRANKCASE,
CRANKSHAFT
ANDCAMSHAFT
GROUP
CRANKCASE
ASSEMBLY

FIG.
REF. PART
I NUMBER DESCRIPTION

1 LW-11033 CRANKCASE ASSEMBLY (Seenote)

2 STD-557 DOWEL,1/2dia.x 11/16long,hollow
3 66734 STUD,1/2-13x 9-7/8long
4 50-15 STUD,1/2-13x 1-7/8long
5 69679 STUD,5/16-18x 10-21/32long
6 38-13 STUD,3/8-16x 1-5/8long
7 1102 PLUG,1/8pipex 3/8long,socket
8 65007 RETAINER,Shroudtube seal
9 38-15 STUD,3/8-16x 1-7/8 long
10 38-22 STUD,3/8-16x 2-3/4long
11 STD-1339 PLUG,1/16-27pipe,Allenhead
12 31C-12 STUD,5/16-18Nat'l.Formx 1-1/2long
13 31C-13 STUD,5/16-18Nat'l.Formx 1-5/8long
14 69796 DOWEL,Crankshaft bearing
15 LW-10647 DOWEL,Crankshaft bearing
16 STD-514 DOWEL,5/16dia.x 1/2long
17 31C-16* STUD,5/16-18x 2.00long,drivenheight(1.27-1.31)
31C-14* STUD,5/16-18x 1-3/4long,drivenheight(.96-1.00)
* Checkcrankcase
for heightof studsrequired.

NOTE

Thispartis notavailable
as a serviceitem.Referto ServiceKit Section7 for applicable
Crankcase
Assy.andgover-
norstudkit partnumber.

1-1
 Lycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport Plant

Figure 1. CRANKCASEASSEMBLY
1-2
TEXTRONLycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
WilliamsportPlant CRANKCASE,CRANKSHAFT
ANDCAMSHAFT GROUP
OILLEVELGAGESANDENGINEMOUNTING
BRACKETS

FIG.
REF. PART
2 NUMBER DESCRIPTION

1 70457 GASKET, Oil fillerextension

2 75761 EXTENSION, Oil filler,long(4-1/2")
77770 EXTENSION, Oil filler,long(6-5/16")
3 75737 EXTENSION, Oil filler,short(2-11/16")
77527 EXTENSION, Oil filler,short(2-3/16")
74313 EXTENSION, Oil filler,short(2-3/16")alternate
75675 EXTENSION, Oil filler,short(2-3/16")
4 74065 "O" RING,Oil levelgage
5 72312 RING,Oil seal,1.00I.D. x 1/8section
6 LW-14779 GAGEASSY.,Oil level(threadedplug)
LW-14774 GAGEASSY.,Oil level(threadedplug)
LW-14756 GAGEASSY.,Oil level(threadedplug)
LW-14771 GAGEASSY.,Oil level(threadedplug)
LW-14762 GAGEASSY.,Oil level(threadedplug)
LW-14732 GAGEASSY.,Oil level(camaction)
LW-14734 GAGEASSY.,Oil level(camaction)
7 70456 BRACKET, Enginemounting(Dynafocal)
12A19770 BRACKET, Enginemounting(Dynafocal)
8 STD-33 WASHER, 3/8 plain
9 STD-678 WASHER, 3/8 lock,internalteeth
10 STD-596 NUT,318-24 plain,21164 thick

1-3
TEXTRONLycoming SERIES
0-540-A PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport Plant

-6

Figure 2. OIL LEVELGAGESAND ENGINE MOUNTING BRACKETS

1-4
TEXTRONLycoming 0-540-ASERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
WilliamsportPlant
CRANKCASE,CRANKSHAFTAND CAMSHAFTGROUP
CRANKCASERELATEDPARTS

FIG.
REF. PART
3 NUMBER DESCRIPTION
1 1028-B BALL,11/16diameter
2 68668* SPRING,Oil pressurereliefvalve
LW-18085
* SPRING,Oil pressurereliefvalve
77467* SPRING,Oil pressurereliefvalve
LW-11713* SPRING,Oil pressurereliefvalve
61084* SPRING,Oil pressurereliefvalve
3 STD-425 WASHER, No. 10 plain(max.9)
4 06E19769-1.25 GASKET,1-1/4I.D. x 1-1/2O.D.x 3/32annular
5 76529 PLUG,Oil reliefvalve
6 18D19394 BEARING, Crankshaft
LW-16047 BEARING, Crankshaft (alternate)
LW-11021 BEARING, Crankshaft (alternate)
7 LW-13884 BEARING, Crankshaft, front
18A19441 BEARING, Crankshaft, front(alternate)
8 LW-13792
* SEAL,Crankshaft oil, solid
LW-11997* * SEAL,Crankshaft oil, split
9 72075 SEAL,Oil, 3/32sectionx 15/32I.D.
10 72091 RING,Oil seal,23/64I.D.x 7/64dia.
11 72877 BODY,Hydraulictappet
12 78290 PLUNGER ASSY.,Hydraulictappet
13 78524 SOCKET, Pushrod,hydraulictappet
* Selectspringto givea minimumof threethreadsexposedon adjustingscrewto allowfield adjustment.
Reference
latesteditionof
SSP-1775, Part1 for springidentification.
* * Seelatesteditionof ServiceInstructionNo. 1324for application.

1-5
 Lycoming SERIES
0-540-A PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport Plant

Figure 3. CRANKCASERELATEDPARTS
1-6
TEXTRONLycoming SERIES
0-540-A PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
WilliamsportPlant
CRANKCASE,CRANKSHAFTAND CAMSHAFTGROUP
CRANKSHAFTAND RELATEDPARTS

FIG.
REF. PART
4 NUMBER DESCRIPTION
1 13E17674 CRANKSHAFT ANDCOUNTERWEIGHT ASSEMBLY
13E17675 CRANKSHAFT ANDCOUNTERWEIGHT ASSEMBLY
13E17677 CRANKSHAFT ANDCOUNTERWEIGHT ASSEMBLY
2 13E17648 CRANKSHAFT ANDPLUGASSEMBLY
13E17649 CRANKSHAFT ANDPLUGASSEMBLY
3 STD-1211 PLUG,2.00dia.expansion
4 73810* BUSHING, Crankshaft dynamiccounterweight
5 71640 PLUG,1-3/8diameter
6 72062-S BUSHING, Propellerflange, long
7 72061-S BUSHING, Propellerflange,short
8 72060-S BUSHING, Propellerflange,indexing
72074-S BUSHING, Propellerflange,indexing
9 STD-1065 DOWEL,Stepped,5/16x 1/4dia. x 35/64long
10 LW-19225** COUNTERWEIGHT ASSEMBLY
11 71903* BUSHING, Dynamiccounterweight
12 70416** ROLLER,Dynamiccounterweight, 6.3order
13 72022** ROLLER, Dynamiccounterweight, 5.1order
14 LW-14820 RING,Internalretaining
15 71907 WASHER, Dynamiccounterweight
16 13S19647 GEAR,Crankshaft
17 LW-18638 LOCKPLATE, Crankshaft gear
18 STD-2209 BOLT,5/16-24x 1-3/4long,hex.head
19 LW-16064 SUPPORT ASSY.,Starterringgear,12/14pitch
78446 SUPPORT ASSY.,Starterringgear,12/14pitch
75221 SUPPORT ASSY.,Starterringgear,12/14pitch
77579 SUPPORT ASSY.,Starterringgear,12/14pitch
77236 SUPPORT ASSY.,Starterringgear,12/14pitch
LW-11151 SUPPORT ASSY.,Starterring gear,12/14pitch
75030 SUPPORT ASSY.,Starterringgear,12/14pitch
20 72566 GEAR,Starterring
* Seelatesteditionof ServiceInstruction No. 1142for application.
* *See latesteditionof ServiceInstructionNo. 1012for application.
* Seelatesteditionof ServiceInstruction No. 1143for application.
* Seelatesteditionof ServiceBulletinNo.475 for application.
for 1.91:1drive.
Provision
Provision
for 3.25:1drivefor alternators
w/de-icerholesfor 3 bladedprop.
§ Provision for 2.50:1drivewithde-icingprovision.
Provision
for 3.25:1drivefor alternators
w/node-icing.
Provision
for 1.91:1drivewithelectricde-icingprovision.
for 3.25:1drivewith3 pointliquidde-icing.
Provision
Provision
for 3.25:1drivefor alternators
w/de-icingprovision.

1-7
 Lycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport Plant

NO. 1

A1A
A1A5
A1B5
A1C5
A1D
A1D5
A3D5

A2B

Figure 4. CRANKSHAFTAND RELATEDPARTS

1-8
 Lycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD FLANGE
CYLINDER MODEL
CRANKCASE ENGINES
Williamsport Plant CRANKCASE,
CRANKSHAFT
ANDCAMSHAFTGROUP
CAMSHAFT
ANDRELATED
PARTS

FIG.
REF. PART
5 NUMBER DESCRIPTION

1 LW-19340* CAMSHAFTASSEMBLY
2 76118 SPACER,Tachometershaft centering
3 76155 SHAFTASSEMBLY,Tachometer
4 LW-18667 PIN, 3/16 dia. x 2-21/64long
5 MS16625-1081 RING,Internalretaining

* Incorporates
integralgear.

0
O

Figure 5. CAMSHAFTAND RELATEDPARTS

1-9
TEXTRONLycoming SERIES
0-540-A PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
WilliamsportPlant CRANKCASE,CRANKSHAFTAND CAMSHAFTGROUP
PROPELLERGOVERNORDRIVE ASSEMBLY

FIG.
REF. PART
6 NUMBER DESCRIPTION

1 70389 GEAR,Propellergovernordriven
2 70384 SHAFT,Propellergovernoridlergear
3 70388 GEAR,Propellergovernoridler
4 STD-737 KEY,3/32x 1/2,Woodruff
5 73249 WASHER, Thrust
73250 WASHER, Thrust
73251 WASHER, Thrust
73252 WASHER, Thrust
01L21418 WASHER, Thrust
6 70455 GASKET, 25/32I.D.x 1-1/8O.D.x 1/32to 3/64thick
7 LW-13896 PLUG,3/4-16hex.head
8 72053 GASKET, Governor
9 72378 COVER,Governor drive
10 STD-35 WASHER, 5/16plain(Woodward governor)
STD-35 WASHER, 5/16plain(ANgovernor)
11 STD-475 WASHER, 5/16lock,internalteeth
12 STD-1410 NUT,5/16-18plain

12-

Figure6. PROPELLER
GOVERNORDRIVEASSEMBLY
1-10
TEXTRONLycoming SERIES
0-540-A PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport
Plant ANDCAMSHAFT
CRANKSHAFT
CRANKCASE, GROUP
CRANKSHAFT
IDLERGEARS

FIG.
REF. PART
7 NUMBER DESCRIPTION

1 71652 GEARASSEMBLY,Crankshaftidler
2 67530 BUSHING,Crankshaftidler gear
3 71668 GEARASSEMBLY,Crankshaftidler, plain
4 67530 BUSHING,Crankshaftidler gear
5 61544 PLUNGER,Fuel pump,long
6 LW-13795 SHAFT,Crankshaftidler gear
7 STD-2167 SCREW,5/16-18x 7/8 long, hex. hd. dr.

1-11
TEXTRONLycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
WilliamsportPlant

7
1

Figure7. CRANKSHAFT
IDLERGEARS
1-12
TEXTRONLycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport Plant CRANKCASE,CRANKSHAFTAND CAMSHAFTGROUP
CRANKCASEATTACHINGPARTS

FIG.
REF. PART
8 NUMBER DESCRIPTIOIN
1 60803 STRAP,Lifting
2 AN6-34A BOLT,3/8-24 x 3-37/64long, hex. head
3 STD-33 WASHER,3/8 plain
4 STD-678 WASHER,3/8 lock, internalteeth
5 STD-596 NUT, 3/8-24 plain
6 LW-25-1.50 BOLT, 1/4-20x 1-1/2 long, hex. head
7 LW-25-1.75 BOLT, 1/4-20x 1-3/4 long, hex. head
8 STD-8 WASHER,1/4 plain
9 LW-25-1.13 BOLT, 1/4-20x 1-1/8 long, hex. head
10 STD-160 WASHER,1/4 lock, internalteeth
11 STD-1411 NUT, 1/4-20plain
12 LW-25S1.50 BOLT,1/4-20x 1-1/2 long, hex. headdr. end
13 STD-8 WASHER,1/4 plain (18 max.)
14 STD-1409 NUT, 1/4-20slottedshear
15 AN6-21 BOLT,3/8-24 x 2-13/64long, hex. head drilled
16 STD-33 WASHER,3/8 plain
17 STD-872 NUT,3/8-24 slotted

1-13
TEXTRONLycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER CRANKCASE
FLANGE ENGINES
MODEL
Williamsport Plant

6,8,10,11 6,10,11 6,8,10,11

1 1
7,10,11
,13/

15,16,17

8,9,10 d

8,9,10 12,13,14

Figure 8. CRANKCASEATTACHING PARTS

1-14
TEXTRONLycoming STANDARD
0-540-ASERIES
CYLINDER
FLANGE
PARTS
CATALOG
CRANKCASE
MODEL
ENGINES
Williamsport Plant ACCESSORYHOUSINGAND RELATEDPARTS
ACCESSORYHOUSINGASSEMBLY

FIG.
REF. PART
9 NUMBER DESCRIPTION
1 73818 GASKET,Accessoryhousing
2 76152 HOUSINGASSEMBLY, Accessory
3 31C-12 STUD,5/16-18x 1-1/2long
4 31CD-17 STUD,5/16-18x 2-1/8long,drilled
5 31C-21 STUD,5/16-18x 2-5/8long
6 25C-21 STUD,1/4-20x 2-5/8long
7 STD-784 PLUG,3/8 pipe,Allenhead
8 1102 PLUG,1/8-27NPT,Allenhead

5-

Figure9. ACCESSORYHOUSING ASSEMBLY

2-1
 Lycoming 0-540-ASERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport Plant ACCESSORYHOUSINGAND RELATEDPARTS
OIL PUMPASSEMBLYAND ACCESSORYHOUSINGATTACHINGPARTS

FIG.
REF. PART
10 NUMBER DESCRIPTION

1 78531 BODY,Oil pump

2 LW-18110 IMPELLER ASSY.,Oil pumpdriven
3 74641 SHAFT,Oil pumpdrive
4 LW-18109 IMPELLER, Oil pumpdriving
5 STD-35 WASHER,5/16 plain
6 STD-1420 NUT, 5/16-18slotted
7 LW-14260 SEAL,Oil, tachometerdrive
8 STD-8 WASHER, 1/4plain
9 STD-160 WASHER, 1/4lock,internalteeth
10 LW-25-0.94 BOLT,1/4-20x 15/16long,hex.head
11 LW-25-1.13 BOLT,1/4-20x 1-1/8long,hex.head
12 LW-25-1.88 BOLT,1/4-20x 1-7/8long,hex.head

Figure 10. OIL PUMP ASSEMBLYAND ACCESSORYHOUSING ATTACHING PARTS

2-2
Intentionally
Left
Blank
 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
WilliamsportPlant ACC
ACCESSORY
HOUSINGAND RELATEDPARTS
FUE
FUEL
PUMPASSEMBLYAND ATTACHMENTS

FIG.
REF. PART
11 NIUMBER DESCRIPTION

1 60096 GASKET,Fuel pump

2 LW-15472 FUEL PUMP(6441271)
3 STD-33 WASHER,3/8 plain
4 STD-1882 SCREW,3/8-16x 1-9/32long, socket hd. dr. hd.

Figure 11. FUEL PUMP ASSEMBLYAND ATTACHMENTS

2-3
TEXTRON Lycoming 0-540-A SERIES PARTS CATALOG
STANDARD CYLINDER FLANGE CRANKCASE MODEL ENGINES

ACCESSORY HOUSING AND RELATED PARTS

OIL PRESSURE SCREEN, OIL FILTER AND OIL COOLER BYPASS VALVE

O QUANTITY PER
FIG. N ASSEMBLY
REF. PART A A A A A A A A A
12 NUMBER DESCRIPTION L 1 1 1 1 1 1 2 3
L A A B C D D B D
5 5 5 5 5
1 62817 SCREEN ASSY., Oil pressure 1
2 61173 GASKET, Oil pressure housing 1
3 68974 HOUSING, Oil pressure screen 1 1
69510 HOUSING, Oil pressure screen & thermostatic valve 1
4 STD-8 WASHER, 1/4 plain 4
5 STD-1856 SCREW, 1/4-20 x 31/32 to 1.00 long, hex. hd. slotted 4
6 06E19769-0.63 GASKET, 7/8 O.D. x 5/8 I.D. x 3/32 annular 1
7 53E19600 VALVE ASSY., Temp. control, oil cooler bypass 1
8 76510 GASKET, Valve 1
9 LW-12795 assembly
GASKET, Oil filter adapter 1 1
10 77853* HOUSING ASSEMBLY, Oil filter 1 1
11 77852 BASE ASSEMBLY, Oil filter 1 1
12 LW-13215* * OIL FILTER, Short (spin on type) 1
13 STD-8 WASHER, 1/4 plain 4 4
14 STD-160 WASHER, 1/4 lock, internal teeth 1 1
15 STD-1411 NUT, 1/4-20 plain 1 1
16 STD-1856 SCREW, 1/4-20 x 1.00 long, hex. hd. self-locking 3 3
17 56E19600 VALVE ASSY., Temp. control, oil cooler bypass 1 1
18 76510 GASKET, Valve 1 1
19 25C-10 STUD, 1/4-20 x assembly
1-1/4 long 1 1

* This complete Oil Filter Housing Assy. is no longer available. Lycoming will continue to supply a Filter Element Kit P/N
LW-14089 which includes (1) element, (1) square gasket, (1) copper gasket and (1) flat gasket.
** Reference latest edition of SSP-885 for oil filter kits and replacement filters
.

2-4
 SERIES
O-540-A PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport Plant

Figure 12. OIL PRESSURE

SCREEN,OIL FILTERAND OIL COOLER BYPASSVALVE
2-5
TEXTRONLycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
WilliamsportPlant ACCESSORYHOUSINGAND RELATEDPARTS
VACUUM PUMPDRIVE,OIL COOLERAND BREATHERFITTINGS

FIG.
REF. PART
13 NUMBER DESCRIPTION
1 61183 GASKET,Accessoryadapter
2 67536 ADAPTERASSEMBLY,Vacuumpump
3 STD-1774 DOWEL,1/8 dia. x 1/4 long
4 06A19956 SEAL, Oil, 7/8 I.D. x 1-1/2O.D. x 5/16 wide
5 72974 GEARASSY.,Vacuum pump driven
6 71596 WASHER,Accessorydriven gear
7 8313 GASKET,Vacuum pump
8 60430 COVER,Vacuumpump
9 68593 SPACER,Vacuumpump stud
10 STD-8 WASHER,1/4 plain
11 STD-160 WASHER,1/4 lock, internalteeth
12 STD-1411 NUT, 1/4-20plain
13 69436* SPRING,Oil cooler bypass
14 62415* PLUNGER,Oil cooler bypass
15 06E19769-0.63 GASKET,7/8 O.D. x 5/8 I.D. x 3/32
16 62417 PLUG,Oil cooler bypass
17 STD-784 PLUG,3/8-18 NPTAllen pipe, slotted
18 71651 FITTING,Breather (assemblein accessoryhousing)
19 69675 CONNECTOR,Acc. hsg. to oil cooler inlet hose
20 71600 ADAPTER,Oil cooler connection
21 78948 ELBOW,45

* Not used if TemperatureControl BypassValve P/N 56E19600is installed.

2-6
TEXTRONLycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLIINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport Plant

6
7

11
12

Figure 13. VACUUM PUMP DRIVE, OIL COOLERAND BREATHERFITTINGS

2-7
TEXTRONLycoming 0-540-ASERIES
PARTS
CATALOG
CYLINDER
STANDARD FLANGE MODEL
CRANKCASE ENGINES
WilliamsportPlant ACCESSORYHOUSINGAND RELATEDPARTS
HYDRAULICPUMP DRIVE,COVERAND ATTACHMENTS

FIG.
REF. PART
14 NUMBER DESCRIPTION

1 72964 GEARASSY.,Hydraulicpumpdriven
2 71596 WASHER,Accessory drivengear
3 68315 GASKET,Accessory driveadapter
4 71675 ADAPTERASSY.,Hydraulicpump
5 06A19956 SEAL,Oil, 7/8I.D.x 1-1/2O.D.x 5/16wide
6 25C-12 STUD,1/4-20x 1-1/2 long
7 STD-1774 PIN,1/8dia. x 1/4long
8 STD-35 WASHER, 5/16plain
9 STD-475 WASHER, 5/16lock,internalteeth
10 STD-1410 NUT,5/16-18plain
11 8313 GASKET, Pump
12 60430 COVER,Pump
13 STD-8 WASHER, 1/4plain
14 STD-160 WASHER, 1/4lock,internalteeth
15 STD-1411 NUT,1/4-20plain
16 69551 GASKET, Hydraulicpumpadapterpad
17 69106 COVER,Hydraulicpumpadapterpad
18 STD-35 WASHER, 5/16plain
19 STD-475 WASHER, 5/16lock,internalteeth
20 STD-1410 NUT,5/16-18plain

2-8
 SERIES
0-540-A PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport Plant

18
1

-2

6
5
-12
13
14
15

Figure 14. HYDRAULIC PUMP DRIVE, COVERAND ATTACHMENTS

2-9
TEXTRONLycoming STANDARD
0-540-ASERIES
CYLINDER
FLANGE
PARTS
CRANKCASE
CATALOG
MODEL
ENGINES
Williamsport Plant CYLINDER,PISTONAND VALVETRAIN
CONNECTINGRODS, PISTONSAND RINGASSEMBLIES

FIG.
REF. PART
15 NUMBER DESCRIPTION

1 LW-11750 CONNECTINGRODASSEMBLY
2 LW-13923 BUSHING,Connectingrod, upper
3 75061 BOLT,Connectingrod
4 LW-12186 NUT, Connectingrod bolt
5 LW-13521 BEARING,Connectingrod
LW-16048 BEARING,Connectingrod (alternate)
LW-13522 BEARING,Connectingrod (alternate)
6 75089 PISTON,Compressionratio 8.50:1
7 LW-14078 PIN, Piston
8 60828 PLUG, Pistonpin
9 74241 RING, Piston,top compression
10 73857 RING, Piston,oil regulating(expandertype)

3-1
TEXTRONLycoming 0-540-A
SERIES
PARTS
CATALOG
CYLINDER
STANDARD FLANGE MODEL
CRANKCASE ENGINES
Williamsport Plant

Figure 15. CONNECTING RODS, PISTONSAND RING ASSEMBLIES

3-2
TEXTRONLycoming STANDARD
0-540-A
CYLINDER
SERIES
FLANGE
PARTS
CATALOG
CRANKCASE
MODEL
ENGINES
WilliamsportPlant CYLINDER,PISTONAND VALVE TRAIN
CYLINDERASSEMBLY

FIG.
REF. PART
16 NUMBER DESCRIPTION

1 LW-12425 CYLINDERANDHEADASSEMBLY (Nitrided)

2 72057 SEAT,Intakevalve
3 72058 SEAT,Exhaustvalve
4 61681 GUIDE,Intakevalve
5 74230 GUIDE,Exhaustvalve
6 66796 INSERT,Sparkplug,18-1.5MM
7 31C-12 STUD,5/16-18x 1-1/2long
8 25C-9 STUD,1/4-20x 1-1/8long
9 MS20823-6D ELBOW,3/8flaredtube
10 66610 BUSHING, Rockershaft
11 STD-1872 INSERT,1/8-27Heli-coil,taperpipethread
12 1102* PLUG,1/8pipex 3/8long
* Assemblein cylinderhead.

3-3
TEXTRONLycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport Plant

Figure 16. CYLINDERASSEMBLY

3-4
TEXTRONLycoming 0-540-ASERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport Plant
CYLINDER,PISTONAND VALVETRAIN
ALVEASSEMBLY
ANDRELATED
PARTS

FIG.
REF. PART
17 NUMBER DESCRIPTION

1 73938 VALVE,Intake
2 LW-19001 VALVE,Exhaust(rotatortype)
3 65441 SEAT,Valvespring,lowerintake
4 LW-13323 SEAT,Valvespring,lowerexhaust
5 LW-10077 SEAT,Valvespring,upperintake
6 LW-16475 SEAT,Valvespring,upperexhaust(rotatortype)
7 60009 KEY,Valve,intake
8 17C21191 KEY,Valve,exhaust(rotatortype)
9 17C19386 CAP,Valvestem,exhaust(rotatortype)
10 LW-11795 SPRING,Valve,auxiliary
11 LW-11800 SPRING,ValVe,outer
12 1102 PLUG,1/8pipex 3/8long
13 LW-18661 SEAL,Shroudtube
14 70310 SEAL,Shroudtube
15 LW-11485 TUBE,Pushrod shroud
16 LW-14995 SPRING,Shroudtube
17 LW-12272 LOCKPLATE, Shroudtube
18 STD-1411 NUT,1/4-20plain

3-5
TEXTRONLycoming SERIES
0-540-A PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport Plant

16
17

11

6
9

1
11
13
10

Figure 17. VALVEASSEMBLYAND RELATEDPARTS

3-6
TEXTRONLycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport Plant CYLINDER,PISTONAND VALVE TRAIN
CYLINDERRELATEDPARTS

FIG.
REF. PART
18 NUMBER DESCRIPTION

1 73434* RODASSEMBLY,Push (totalof 12 required)

15F19957-35* RODASSEMBLY,Push (totalof 12 required)
15F19957-36* RODASSEMBLY,Push (totalof 12 required)
73437* RODASSEMBLY,Push (totalof 12 required)
2 71481 RING,Oil seal, 3/32 dia. section x 4-27/32I.D.
3 69531 PLATE,Cylinderhold down nut
4 71133 NUT, 1/2-20NF-3,cylinder hold down
5 71134 NUT,3/8-24 NF-3,cylinder hold down
6 17F19353 ROCKERASSEMBLY,Valve
7 74637 BUSHING,Valve rocker
8 LW-13790 SHAFT,Valve,rocker
9 LW-12892 THRUSTBUTTON,Rocker shaft

* See latest edition of Textron LycomingServiceInstructionNo. 1060for completepush rod application.

3-7
 Lycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport Plant

3-

-9

-7

-8

Figure 18. CYLINDER RELATEDPARTS

3-8
TEXTRONLycoming STANDARD
0-540-A
SERIES
PARTS
CATALOG
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
WilliamsportPlant CYLINDER,PISTONAND VALVETRAIN
CYLINDERHEADDRAINTUBES, INTERCYLINDERCOOLINGBAFFLESAND RELATEDPARTS

FIG.
REF. PART
19 NUMBER DESCRIPTION

1 75906 GASKET,Rockerbox cover

2 61247 COVER,Rocker box
3 STD-1925 SCREW,1/4-20x 5/8 long, pan hd., self-locking
4 STD-35 WASHER,5/16 plain
5 STD-475 WASHER,5/16 lock, internal teeth
6 STD-1410 NUT, 5/16 plain
7 STD-684 NIPPLE,Straight, 3/8 I.D. hose
8 STD-1821 HOSE,3/8 I.D. x 2-1/2 long
9 LW-15592-5-05 CLAMP,Hose
10 68759 TUBE ASSY.,Cylinderhead oil drain, cyl. no. 1
71737 TUBE ASSY.,Cylinderhead oil drain, cyl. no. 2
68761 TUBE ASSY.,Cylinderhead oil drain, cyl. nos. 3, 4, 5, 6
11 72152 BAFFLEASSY.,Intercylinder
12 71611 RETAINER,Intercylinderbaffle
13 71610 HOOK, Intercylinderbaffle retainer

3-9
 TEXTRONLycoming SERIES
0-540-A PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport Plant

12

10

4 1
5
2
6

00

Figure19.CYLINDERHEADDRAINTUBES,INTERCYLINDER
COOLINGBAFFLES
AND RELATED
PARTS
3-10
TEXTRONLycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
WilliamsportPlant IGNITIONSYSTEM
BENDIX
BE MAGNETOSAND MAGNETODRIVES

FIG.
REF. PART
20 NUMBER DESCRIPTION

1 LW-13641 CUSHION,Magnetodrive
2 62224 GASKET,Magnetoadapter
62224 GASKET,Magnetoadapter
3 LW-12707 ADAPTER, Magneto
4 LW-12681 GASKET,Magneto
5 73000 COUPLING, Magnetodrive
73013 COUPLING, Magnetodrive(retard)
6 LW-19096 GEARRETAINER ASSEMBLY
7 67542 BEARING, Ball
8 LW-19096* GEARRETAINER ASSEMBLY
9 67542* BEARING, Ball
10 LW-19100* GEARRETAINER ASSEMBLY
11 67542* BEARING, Ball
12 LW-51365-47 MAGNETO, Bendix,impulsecoupling(S6LN-21)
LW-163050-9 MAGNETO, Bendix(S6LN-204)
LW-163010-10 MAGNETO, Bendix,retardbreaker(S6LN-200)
LW-51365-46 MAGNETO, Bendix(S6LN-20)
LW-51365-47 MAGNETO, Bendix,impulsecoupling(S6LN-21)
LW-349290-1 MAGNETO, Bendix(S6LN-1208)
LW-349310-1 MAGNETO, Bendix(S6LN-1209)
13 STD-1727 WASHER, 3/4O.D.x 21/64I.D. x 1/8
14 STD-475 WASHER, 5/16lock,internalteeth
15 STD-1410 NUT,5/16-18plain
16 66M19385 CLAMP,Magneto
* Usedwithtwo S6LN-21ImpulseMagnetos.

4-1
 SERIES
0-540-A PARTS
CATALOG
CYLINDER
STANDARD FLANGE MODEL
CRANKCASE ENGINES
WilliamsportPlant

3-16
1
1

7,9,11-

Figure20. BENDIXMAGNETOS
AND MAGNETODRIVES
4-2
TEXTRONLycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport Plant IGNITIONSYSTEM
IGNITIONHARNESSESAND ATTACHMENTSFOR BENDIXMAGNETOS

FIG.
REF. PART
21 NUMBER DESCRIPTION

1 LW-M-2469* HARNESSASSY., Magneto,left

LW-M-2470* HARNESSASSY., Magneto,right
LW-M-2457 HARNESSASSY., Magneto,left (1200series)
LW-M-2458 HARNESSASSY., Magneto,right (1200series)
LW-M-2463 HARNESSASSY., Magneto,left
LW-M-2464 HARNESSASSY., Magneto,right
2 LW-M-2376 PLATE,Spark plug cable
3 72351 SCREW,No. 10-32self-locking
4 LW-18959-175-25 CLAMP,1-3/4 I.D., offset
5 LW-16266-25-25 CLIP, One wire for 1/4 screw
6 LW-14060 CLIP, Two wire for 1/4 screw
7 LW-16266-10-63 CLIP, Six wire for no. 10 screw
8 LW-16266-25-44 CLAMP,Three wire
9 STD-553 SCREW,No. 6-32x 1/2 long
10 AN365-632A NUT, No. 6-32 self-locking
11 STD-692 SCREW,No. 10-32x 1/2 long
12 STD-670 NUT, No. 10-32self-locking
13 72815 BRACKET,Twist
14 STD-8 WASHER,1/4 plain
15 STD-160 WASHER,1/4 lock
16 STD-696 WASHER,1/4 plain
17 STD-1874 SCREW,1/4-20
18 76734 ZIP STRAP
19 1182-B3** SPARKPLUG (ChampionREM-40E)
1182-Q5* * SPARKPLUG (AuburnSR93)

* Usedfor parallelvalve and Piper long top leads.

* * See latest edition of Textron LycomingServiceInstructionNo. 1042for complete listing of all approvedspark plugs.

4-3
TEXTRONLycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport Plant

7,11,12,13

18 8,11,12,13

8,11,12,13
8,11,12,13
1

Figure21. IGNITION HARNESSES

AND ATTACHMENTS
FORBENDIXMAGNETOS
4-4
TEXTRONLycoming STANDARD
CYLINDER
0-540-A
FLANGE
SERIES
CRANKCASE
PARTS
MODEL
CATALOG
ENGINES
Williamsport Plant IGNITIONSYSTEM
SLICK MAGNETOS,HARNESSES,DRIVESAND SPARKPLUGS

FIG.
REF. PART
22 NUMBER DESCRIPTION

1 73000 COUPLING, Magnetodrive

2 LW-13641 CUSHION, Magnetodrive
3 62224 GASKET, Magnetoadapter
4 LW-12707 ADAPTER, Magneto,impulsecoupling
5 LW-12681 GASKET, Magneto
6 STD-713 PIN,Cotter,3/32x 3/4 long
7 66JC45SDNN* MAGNETO, RightandLeft (6255)impulsecoupling
66JP-OSCNN
* MAGNETO, Right(6250)plain
66JC45SDNN* MAGNETO, Left(6255)impulsecoupling
66JR37SCNN MAGNETO, Left(6293)retard
8 67U20612 HARNESS ASSY.,Ignition,right(M-2956)
67U20608 HARNESS ASSY.,Ignition,right(M-2878)
67U20630 HARNESS ASSY.,Ignition,right(M-6026)
9 67U20609 HARNESS ASSY.,Ignition,left(M-2877)
67U20613 HARNESS ASSY.,Ignition,left(M-6027)
67U20631 HARNESS ASSY.,Ignition,left(M-6025)
10 76734 ZIP STRAP
11 66M21195 CLAMP,Magneto
12 STD-475 WASHER, 5/16lock,internalteeth
13 STD-1727 WASHER, Plain,3/4 O.D.x 11/32I.D.x 1/8thick
14 STD-1410 NUT,5/16-18plain
15 1182-B3* SPARKPLUG(ChampionREM-40E)
1182-Q5* SPARKPLUG(AuburnSR93)
16 LW-19096 GEARRETAINER ASSEMBLY
17 67542 BEARING,
Ball
18 LW-19096** GEARRETAINER ASSEMBLY
19 67542** BEARING,
Ball
20 LW-19100 ** GEARRETAINER ASSEMBLY
21 67542* * BEARING,
Ball
* Seelatesteditionof TextronLycomingServiceInstruction No. 1042for completelistingof all approved
sparkplugs.
* * Usedwhentwo S6LN-21 ImpulseMagnetos are installed.
* Seelatesteditionof ServiceInstruction
No. 1443for completelistingof approvedSlickMagnetos.

4-5
TEXTRONLycoming STANDARD
CYLINDER
0-540-A
SERIES
PARTS
CATALOG
FLANGE
CRANKCASE
MODEL
ENGINES
WilliamsportPlant

13
12
14

15

Figure 22. SLICK MAGNETOS,HARNESSES,

DRIVES AND SPARKPLUGS
4-6
TEXTRONLycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Plant
Williamsport
BAG - MAGNETO HARNESS ATTACHING
PART NO. 01P19762-3
0-540-A1A, -A1A5, -A1B5, -A1C5, -A1D, -A1D5, -A2B, -A3D5

Part No. Part Name Qty.

01P19762-3 BAG - MAGNETO HARNESS ATTACHING 1
LW-16266-25-25 CLIP, 1 wire 2
LW-14060 CLIP, 2 wire, 1/4 screw 3
STD-8 WASHER, 1/4 plain 10
STD-160 WASHER, 1/4 lock 10
AN500-416-12 SCREW, 1/4 x 3/4 long 2
STD-1874 SCREW, Rocker box 6
76734 ZIP STRAP 8
LW-16266-25-44 CLIP, 4 wire 3
STD-1411 NUT, 1/4 plain 4
STD-696 WASHER, 1/4 thin 6
LW-M-2376 PLATE, 3 wire 2

4-7
 Lycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
WilliamsportPlant
BAG - MAGNETO HARNESS ATTACHING
PART NO. 01P19762-4
0-540-A1D5

Part No. Part Name Qty.

01P19762-4 BAG - MAGNETO HARNESS ATTACHING 1
LW-16266-25-25 CLIP, 1 wire 4
LW-14060 CLIP, 2 wire, 1/4 screw 4
STD-8 WASHER, 1/4 plain 12
STD-160 WASHER, 1/4 lock 10
STD-1874 SCREW, Rocker box 6
76734 ZIP STRAP 12
LW-16266-10-75 CLIP, 6 wire 2
LW-16266-25-44 CLIP, 4 wire 5
STD-696 WASHER, 1/4 thin 6
AN500-416-18 SCREW, 1/4 x 1-1/8 long 2
STD-1925 SCREW, 1/4 x 5/8 long 4
72815 BRACKET, Twist 4
STD-692 SCREW, No. 10 (bracket to clip) 4
STD-425 WASHER, No. 10 (bracket to clip) 4
STD-670 NUT, No. 10 (bracket to clip) 4
LW-M-2376 PLATE, 3 wire 2

4-8
TEXTRONLycoming 0-540-ASERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
WilliamsportPlant ELECTRICALCOMPONENTS
PRESTOLITE
STARTERSAND ATTACHINGPARTS
PRESTOLITE

FIG.
REF. PART
23 NUMBER DESCRIPTION

1 LW-15571 STARTER,12volt (3.38:1internalreduction,12/14pitch)(MZ-4222)

LW-15577* STARTER,24volt (3.38:1internalreduction,12/14pitch)(MHB-4018)
LW-15572 STARTER,24volt (3.38:1internalreduction,12/14pitch)(MHB-4016)
2 STD-35 WASHER, 5/16plain
3 STD-475 WASHER, 5/16lock,internalteeth
4 LW-31-1.16 BOLT,5/16-18x 1-5/32long,hex.head
5 STD-1410 NUT,5/16-18plain
* Usedif YorkCompressor
is installed.

NOTE

Seelatesteditionof ServiceInstruction
No. 1154for completelistingof FAAapproved
starters,generators,
alter-
nators,regulators
andrelays.

Figure 23. PRESTOLITE

STARTERS
AND ATTACHING PARTS
5-1
TEXTRONLycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
WilliamsportPlant ELECTRICALCOMPONENTS
TEXTRON
LYCOMING
LIGHTWEIGHTSTARTER
ANDATTACHING
PARTS

FIG.
REF. PART
24 NUMBER DESCRIPTION

1 31B21064* STARTER ASSEMBLY, 12/14pitch,24volt

31A21198* STARTER ASSEMBLY, 12/14pitch,12volt
2 31E21143 MOTOR ANDSOLENOID ASSEMBLY (24volt)
31E21199 MOTOR ANDSOLENOID ASSEMBLY (12volt)
3 31D21088 HOUSING ASSY.,Startersupport
4 STD-514 DOWEL
5 LW-25-1.75 BOLT,1/4-20x 1-3/4long,hex.head
6 LW-25-2.00 BOLT,1/4-20x 2.00long,hex.head
7 STD-160 WASHER, 1/4lock,internalteeth
8 STD-8 WASHER, 1/4plain
9 STD-35 WASHER, 5/16plain
10 STD-475 WASHER, 5/16lock,internalteeth
11 LW-31-1.16 BOLT,5/16-18x 1-5/32long,hex.head
12 STD-1410 NUT,5/16-18plain
13 01L21158** SHIM,Starter(housingshaped)
14 01L21159** SHIM,Starter
* Referto latesteditionof StarterMaintenance ManualSSP-490 for completepartsbreakdown.
* * Referto latesteditionof ServiceInstruction
No. 1447for shimapplication.

NOTE

Seelatesteditionof ServiceInstruction
No. 1154for completelistingof FAAapproved
starters,generators,
alter-
nators,regulators
and relays.

Figure 24. TEXTRON LYCOMING LIGHT WEIGHT STARTERAND ATTACHING PARTS

5-2
TEXTRONLycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
WilliamsportPlant ELECTRICALCOMPONENTS
ALTERNATORASSEMBLIESAND BELTS

FIG.
REF. PART
25 NUMBER DESCRIPTION

1 32C19553 ALTERNATOR ASSY.,24 volt, 70 amp.

2 LW-14326 ALTERNATOR,24 volt, 70 amp. (ALU-8421-LS)
3 36B19484 PULLEY,Alternator
4 32B19549 ALTERNATORASSY., 12 volt, 70 amp.
5 LW-14318 ALTERNATOR,12 volt, 70 amp. (ALX-8421-LS)
6 36B19484 PULLEY,Alternator
7 37A19773-376 BELT,Alternatordrive,3/8 in. wide
37A19773-367 BELT,Alternatordrive,3/8 in. wide (Piper)
71579 BELT,Generatordrive, 1.91:1drive
72000 BELT,Generatordrive, 2.50:1drive
73275 BELT,Generatordrive, 1.91:1drive

NOTE

Seelatest edition of ServiceInstructionNo. 1154for completelisting of FAA approvedstarters,generators,alter-

nators,regulatorsand relays.

5-3
 Lycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport
Plant

Figure 25. ALTERNATORASSEMBLIESAND BELTS

5-4
TEXTRONLycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport Plant ELECTRICALCOMPONENTS
ALTERNATORMOUNTINGAND ATTACHINGPARTS

FIG.
REF. PART
26 NUMBER DESCRIPTION

1 07A19474 BRACKET, Alternator

2 73383 LOCKPLATE, 5/16bolt x 1.00spacing
3 LW-31-0.94 BOLT,5/16-18x 15/16long,hex.head
4 75380 LINK,Alternatoradjusting
5 STD-35 WASHER, 5/16plain
6 LW-31
H0.75 BOLT,5/16-18x 3/4 long,hex.hd.dr.
7 STD-1727 WASHER, Plain,3/4O.D.x 11/32I.D. x 1/8thick
8 LW-31H0.75 BOLT,5/16-18x 3/4 long,hex.hd.dr.
9 74323 STRUT,Alternatorsupport
10 LW-31H0.75 BOLT,5/16-18x 3/4long,hex.hd.dr.
11 STD-690 WASHER, 13/16O.D.x 25/64I.D.x 1/16thick
12 AN6-17 BOLT,3/8-24x 1-61/64long,hex.hd.drilledend
13 STD-690 WASHER, 13/16O.D.x 25/64I.D.x 1/16thick
14 STD-872 NUT,3/8-24slotted
15 STD-713 PIN,Cotter,3/32dia.x 3/4 long
16 AN6-16 BOLT,3/8-24x 1-53/64long,hex.hd.drilledend
17 76534 SHIM,1-1/8O.D.x 13/32I.D.x 1/64thick
18 STD-690 WASHER, 13/16O.D.x 25/64I.D.x 1/16thick
19 STD-872 NUT,3/8-24slotted
20 STD-713 PIN,Cotter,3/32dia.x 3/4 long

5-5
 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport Plant

A1D
A1D5

Figure 26. ALTERNATORMOUNTING AND ATTACHING PARTS

5-6
TEXTRON Lycoming 0-540-A
SERIES CATALOG
PARTS
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
WilliamsportPlant ELECTRICALCOMPONENTS
ALTERNATORMOUNTINGAND ATTACHINGPARTS

FIG.
REF. PART
27 NUMBER DESCRIPTION

1 77756* BRACKET, Alternator

2 73383 LOCKPLATE, 5/16boltx 1.00spacing
3 LW-31-0.94 BOLT,5/16-18x 15/16long,hex.head
4 LW-10091
* LINK,Alternatoradjusting
5 STD-35 WASHER, 5/16plain
6 LW-31H0.75 BOLT,5/16-18x 3/4 long,hex.hd.dr.
7 STD-1727 WASHER, Plain,3/4O.D.x 11/32I.D.x 1/8thick
8 LW-31H0.75 BOLT,5/16-18x 3/4 long,hex.hd.dr.
9 AN6-12 BOLT,3/8-24x 1-21/64long,hex.hd., drilledend
10 STD-690 WASHER, 13/16O.D.x 25/64I.D.x 1/16thick
11 STD-872 NUT,3/8-24slotted
12 STD-713 PIN,Cotter,3/32dia.x 3/4 long
13 76534 SHIM,1-1/8O.D.x 13/32I.D.x .005thick
14 AN6-16 BOLT,3/8-24x 1-53/64long,hex.hd., drilledend
15 STD-690 WASHER, 13/16O.D.x 25/64I.D.x 1/16thick
16 STD-872 NUT,3/8-24slotted
17 STD-713 PIN,Cotter,3/32dia.x 3/4 long
* Specialinstallation
for PiperAircraftCorp.

5-7
TEXTRONLycoming 0-540-ASERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
WilliamsportPlant

A1C5
A1D5

Figure 27. ALTERNATOR

MOUNTING AND ATTACHINGPARTS
5-8
 TEXTRONLycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
WilliamsportPlant ELECTRICALCOMPONENTS
GENERATOR
GENERATOR
MOUNTING
ANDATTACHING
PARTS

FIG.
REF. PART
27A NUMBER DESCRIPTION
1 70419 BRACKET, Generator
2 LW-31-0.94 BOLT,5/16-18x 15/16long,hex.head
3 73383 LOCKPLATE, 5/16boltx 1.00spacing
4 76028 LINK,Generatoradjusting
75380 LINK,Generatoradjusting(Piper)
5 STD-35 WASHER, 5/16plain
6 LW-31H0.75 BOLT,5/16-18x 3/4 long,hex.hd.dr.
7 LW-31S1.16 BOLT,5/16-18x 1-5/32long,dr. end
8 STD-35 WASHER, 5/16plain
9 STD-1420 NUT,5/16-18slotted
10 STD-68 PIN,Cotter
11 STD-1727 WASHER, Plain,3/4O.D.x 11/32I.D.x 1/8thick
12 LW-31H0.75 BOLT,5/16-18x 3/4long,hex.hd.dr.

AddedOctober,1991 5-9
 0-540-ASERIES
PARTS
CATALOG
TEXTRONLycoming STANDARD FLANGE
CYLINDER MODEL
CRANKCASE ENGINES
Williamsport Plant

Figure 27A. GENERATORMOUNTING AND ATTACHING PARTS

5-10 Added October, 1991
TEXTRONLycoming PARTS
SERIES
0-540-A CATALOG
STANDARD
CYLINDER CRANKCASE
FLANGE ENGINES
MODEL
Williamsport Plant OIL SUMPAND INDUCTIONSYSTEM
OIL SUMPASSEMBLY,CARBURETORSAND ATTACHMENTS

FIG.
REF. PART
28 NUMBER DESCRIPTION

1 06B21236 GASKET,Oil sump

2 LW-13901 SUMPASSEMBLY,Oil
3 71699 CONNECTION,Intake pipe
4 25C-11 STUD, 1/4-20x 1-3/8 long
5 31C-15 STUD,5/16-18x 1-7/8long
6 38-15 STUD,3/8-16x 1-7/8 long
7 STD-1173 INSERT,1/4-20Heli-Coilx 1/2 long
8 STD-8 WASHER,1/4 plain
9 STD-160 WASHER,1/4 lock, internal teeth
10 LW-25-1.13 BOLT,1/4-20x 1-1/8long, hex. head
11 LW-25-1.00 BOLT,1/4-20x 1.00 long, hex. head
12 STD-1411 NUT, 1/4-20plain
13 STD-551 PLUG,1/2-14 NPT,sq. hd.,drilled
14 70484 SCREEN,Oil suction
15 06E19769-1.00 GASKET,1.00 i.D. x 1-1/4O.D. x 3/2 thick
16 LW-12545 PLUG, 1.00-20thread x 5/8 hex. head
17 STD-2229 PLUG, 1/2-14NPT, Alien head
18 66224 GASKET,Carburetor
19 72740 CARBURETOR, (10-4404)(Model MA-4-5)
74121 CARBURETOR, (10-4404-1)(ModelMA-A-5)
20 STD-35 WASHER,5/16 plain
21 STD-1410 NUT, 5/16-18plain
22 STD-36 LOCKNUT,5/16, Palnut

RevisedOctober, 1991 6-1

 Lycoming SERIES
0-540-A CATALOG
PARTS
STANDARD FLANGE
CYLINDER MODEL
CRANKCASE ENGINES
WilliamsportPlant

-1

12
9 4

11

16
19

20-
21
22-

CARBURETORS
Figure 28. OIL SUMP ASSEMBLY, AND ATTACHMENTS
6-2 Revised October, 1991
 0-540-A
SERIES
PARTS
CATALOG
CYLINDER
STANDARD CRANKCASE
FLANGE MODEL
ENGINES
Williamsport Plant OIL SUMP AND INDUCTIONSYSTEM
INTAKEPIPESAND ATTACHMENTS

FIG.
REF. PART
29 NUMBER DESCRIPTION

1 70485 PIPE,Intake
2 69603 HOSE,1-3/4I.D.x 2-3/16O.D.x 1-3/4long
3 LW-15592-8-28 CLAMP,Hose
4 71973 GASKET, 2 boltflange,1-7/8I.D.
5 73346 FLANGE, Intakepipe,upper
6 STD-8 WASHER, 1/4plain
7 STD-160 WASHER,1/4 lock, internal teeth
8 LW-25-1.25 BOLT,1/4-20x 1-1/4long, hex. head

3-

Figure 29. INTAKE PIPESAND ATTACHMENTS

6-3
TEXTRONLycoming SERIES
0-540-A PARTS
CATALOG
CYLINDER
STANDARD CRANKCASE
FLANGE MODEL
ENGINES
Williamsport Plant OIL SUMPAND INDUCTIONSYSTEM
PRIMINGSYSTEM

FIG.
REF. PART
30 NUMBER DESCRIPTION

1 LW-12098-0-160 TUBE ASSEMBLY,Primer,cyl. no. 3

2 LW-12098-0-190 TUBE ASSEMBLY,Primer,cyl. no. 4
3 LW-12098-0-120 TUBEASSEMBLY,Primer,cyls. no. 5 and 6
4 LW-12098-0-100 TUBE ASSEMBLY,Primer, intermediate,right
5 LW-12098-0-120 TUBEASSEMBLY,Primer, intermediate,left
6 LW-12598 SLEEVE,Primer line
7 LW-16266-25-13 CLAMP,Primer line
8 LW-18959-175-25 CLAMP,Primer line
9 STD-553 SCREW,No. 6-32 x 1/2 long, round head
10 AN365-632A NUT, No. 6-32, self-locking
11 STD-853 TEE, Union, 1/8 tube
12 63D21408 NIPPLEASSY., Primer

Figure 30. PRIMING SYSTEM

6-4
TEXTRONLycoming STANDARD
0-540-A
CYLIINDER
FLANGE
SERIES
PARTS
CATALOG
CRANKCASE
MODEL
ENGINES
Williamsport
Plant
SERVICE KIT SECTION
SEAL AND GASKET SET
Part No. Part Name Qty.
71569-1 SEAL AND GASKET SET 1
LW-12272 LOCKPLATE, Shroud tube 6
LW-12681 GASKET, Magneto 2
LW-12795 GASKET, Oil filter adapter 1
06B21326 GASKET, Oil sump 1
LW-13792 SEAL, Crankshaft oil 1
LW-14260 SEAL, Tachometer drive oil 1
LW-14995 SPRING, Shroud tube 6
LW-15628 SEAL, Crankshaft 1
LW-18638 LOCKPLATE, Crankshaft gear 1
LW-18661 SEAL, Shroud tube 12
MS16625-1081 RING, Internal retaining 1
06E19769-1.00 GASKET, Oil suction screen 1
STD-213 SEAL, Oil 1
06E19769-0.63 GASKET, Annular 2
06E19769-1.25 GASKET, Annular 1
06A19956 SEAL, Oil 2
1691-C GASKET, Fuel pump 1
8313 GASKET, Vacuum pump
60096 GASKET, Fuel pump 1
61173 GASKET, Oil pressure housing 1
61183 GASKET, Accessory adapter 1
62224 GASKET, Magneto adapter 1
LW-19296 GASKET, Exhaust flange 6
66224 GASKET, Carburetor 1
68315 GASKET, Accessory drive adapter 1
69164 GASKET, Fuel pump adapter 1
69345 SPACER 6
69551 GASKET, Accessory drive adapter 1
70310 SEAL, Shroud tube 12
70455 GASKET 1
70457 GASKET 1
71481 RING, Oil seal 6
71667 LOCKPLATE, Fuel pump idler gear 1
71973 GASKET, 2 Bolt flange
72053 GASKET, Governor 1
72059 GASKET, Oil filler extension 1
72075 RING, Oil seal 8
72078 LOCKPLATE, Cam gear 2
72091 RING, Oil seal 2
72210 GASKET 1
72312 RING, Oil seal 1
73383 LOCKPLATE, Generator bracket 2
73818 GASKET, Accessory housing 1
74065 "O" Ring, Oil level gage 1
74068 "O" Ring 1
74305 SEAL 1
75906 GASKET, Rocker box cover 6
76510 GASKET 1
76940 SEAL, Crankshaft oil 1

7-1
TEXTRONLycoming 0-540-A
CATALOG
PARTS
SERIES
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport
Plant
SERVICE KIT SECTION
CYLINDER, PISTON AND RING ASSEMBLY
Part No. Part Name Qty.
05K21102 CYLINDER, PISTON AND RING ASSEMBLY 1
LW-12425 CYLINDER AND HEAD ASSEMBLY 1
LW-19001 VALVE, Exhaust 1
73938 VALVE, Intake 1
LW-11800 SPRING, Valve, outer 2
LW-11795 SPRING, Valve, inner 2
LW-10077 SEAT, Valve spring, upper, intake 1
LW-16475 SEAT, Valve spring, upper, exhaust 1
LW-13323 SEAT, Valve spring, lower, exhaust 1
60009 KEY, Valve, intake 2
17C21191 KEY, Valve, exhaust 2
17C19386 CAP, Valve stem, exhaust 1
75089 PISTON 1
74241 RING, Piston, compression 2
73857 RING, Piston, oil regulating 1
LW-14077 PIN, Piston 1
LW-11775 PLUG, Piston pin 2
60828 PLUG, Piston pin 2
71481 RING, Cylinder base seal 1
LW-18661 SEAL, Shroud tube 2
70310 SEAL, Shroud tube 2
75906 GASKET, Rocker box cover 1
SSP-2272 TAG 1
SSP-2472 TAG 1
65441 SEAT, Valve spring, lower, intake 1

7-2
TEXTRONLycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
WilliamsportPlant
SERVICE KIT SECTION
CRANKCASE ASSY. AND GOVERNOR STUD KIT
Part No. Part Name Qty.

LW-11033-S CRANKCASE ASSY. AND GOVERNOR STUD KIT 1

LW-11033* CRANKCASE ASSEMBLY 1
31C-14 STUD, AN governor 4
31C-16 STUD, Woodward governor 4

* See Figure 1, Page 1-1 for component parts.

7-3
TEXTRONLycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
WilliamsportPlant
NUMERICAL INDEX
PART NO. PART NAME PAGE NO. PART NO. PART NAME PAGE NO.

AN6-12 Bolt 5-7 LW-12425 Cylinder Assy. 3-3

AN6-16 Bolt 5-5 LW-12545 Plug 6-1
AN6-16 Bolt 5-7 LW-12598 Sleeve 6-4
AN6-17 Bolt 5-5 LW-12681 Gasket 4-1
AN6-21 Bolt 1-13 LW-12681 Gasket 4-5
AN6-34A Bolt 1-13 LW-12707 Adapter 4-1
AN365-632A Nut 4-3 LW-12707 Adapter 4-5
AN365-632A Nut 6-4 LW-12795 Gasket 2-4
LW-M-2376 Plate 4-3 LW-12892 Thrust Button 3-7
LW-M-2457 HarnessAssy. 4-3 LW-13215 Oil Filter 2-4
LW-M-2458 HarnessAssy. 4-3 LW-13323 Seat 3-5
LW-M-2463 HarnessAssy. 4-3 LW-13521 Bearing 3-1
LW-M-2464 HarnessAssy. 4-3 LW-13522 Bearing 3-1
LW-M-2469 HarnessAssy. 4-3 LW-13641 Cushion 4-1
LW-M-2470 HarnessAssy. 4-3 LW-13641 Cushion 4-5
LW-25-0.94 Bolt 2-2 LW-13790 Shaft 3-7
LW-25-1.00 Bolt 6-1 LW-13792 Seal 1-5
LW-25-1.13 Bolt 1-13 LW-13795 Shaft 1-11
LW-25-1.13 Bolt 2-2 LW-13884 Bearing 1-5
LW-25-1.13 Bolt 6-1 LW-13896 Plug 1-10
LW-25-1.25 Bolt 6-3 LW-13901 Sump Assy. 6-1
LW-25-1.50 Bolt 1-13 LW-13923 Bushing 3-1
LW-25-1.75 Bolt 1-13 LW-14060 Clip 4-3
LW-25-1.75 Bolt 5-2 LW-14078 Pin 3-1
LW-25-1.88 Bolt 2-2 LW-14260 Seal 2-2
LW-25-2.00 Bolt 5-2 LW-14318 Alternator 5-3
LW-31H0.75 Bolt 5-5 LW-14326 Alternator 5-3
LW-31H0.75 Bolt 5-7 LW-14732 Gage Assy. 1-3
LW-31-0.94 Bolt 5-5 LW-14734 Gage Assy. 1-3
LW-31-0.94 Bolt 5-7 LW-14756 Gage Assy. 1-3
LW-31-1.16 Bolt 5-1 LW-14762 Gage Assy. 1-3
LW-31-1.16 Bolt 5-2 LW-14771 Gage Assy. 1-3
LW-10077 Seat 3-5 LW-14774 Gage Assy. 1-3
LW-10091 Link 5-7 LW-14779 Gage Assy. 1-3
LW-10647 Dowel 1-1 LW-14820 Ring 1-7
LW-11021 Bearing 1-5 LW-14995 Spring 3-5
LW-11033 CrankcaseAssy. 1-1 LW-15472 Fuel Pump 2-3
LW-11151 Support Assy. 1-7 LW-15571 Starter 5-1
LW-11485 Tube 3-5 LW-15572 Starter 5-1
LW-11713 Spring 1-5 LW-15577 Starter 5-1
LW-11750 Rod Assy. 3-1 LW-15592-5-05 Clamp 3-9
LW-11795 Spring 3-5 LW-15592-8-28 Clamp 6-3
LW-11800 Spring 3-5 LW-16047 Bearing 1-5
LW-11997 Seal 1-5 LW-16048 Bearing 3-1
LW-12098-0-100 Tube Assy. 6-4 LW-16064 Support Assy. 1-7
LW-12098-0-120 Tube Assy. 6-4 LW-16266-10-63 Clip 4-3
LW-12098-0-160 Tube Assy. 6-4 LW-16266-25-13 Clamp 6-4
LW-12098-0-190 Tube Assy. 6-4 LW-16266-25-25 Clip 4-3
LW-12186 Nut 3-1 LW-16266-25-44 Clamp 4-3
LW-12272 Lockplate 3-5 LW-163010-10 Magneto 4-1

8-1
TEXTRONLycoming 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
Williamsport Plant
NUMERICAL INDEX (Cont.)
PART NO. PART NAME PAGE NO. PART NO. PART NAME PAGE NO.

LW-163050-9 Magneto 4-1 STD-160 Washer 4-3

LW-16475 Seat 3-5 STD-160 Washer 5-2
LW-18085 Spring 1-5 STD-160 Washer 6-1
LW-18109 Impeller 2-2 STD-160 Washer 6-3
LW-18110 Impeller Assy. 2-2 STD-425 Washer 1-5
LW-18638 Lockplate 1-7 STD-475 Washer 1-10
LW-18661 Seal 3-5 STD-475 Washer 2-8
LW-18667 Pin 1-9 STD-475 Washer 3-9
LW-18959-175-25 Clamp 4-3 STD-475 Washer 4-1
LW-18959-175-25 Clamp 6-4 STD-475 Washer 4-5
LW-19001 Valve 3-5 STD-475 Washer 5-1
LW-19096 RetainerAssy. 4-1 STD-475 Washer 5-2
LW-19096 Gear RetainerAssy. 4-5 STD-514 Dowel 1-1
LW-19100 RetainerAssy. 4-1 STD-514 Dowel 5-2
LW-19100 Gear RetainerAssy. 4-5 STD-551 Plug 6-1
LW-19225 Counterweight Assy. 1-7 STD-553 Screw 4-3
LW-19298 Ring 3-3 STD-553 Screw 6-4
LW-19299 Ring 3-3 STD-557 Dowel 1-1
LW-19340 CamshaftAssy. 1-9 STD-596 Nut 1-3
LW-349290-1 Magneto 4-1 STD-596 Nut 1-13
LW-349310-1 Magneto 4-1 STD-670 Nut 4-3
LW-51365-46 Magneto 4-1 STD-678 Washer 1-3
LW-51365-47 Magneto 4-1 STD-678 Washer 1-13
MS-16625-1081 Ring 1-9 STD-684 Nipple 3-9
MS20823-6D Elbow 3-3 STD-690 Washer 5-5
STD-8 Washer 1-13 STD-690 Washer 5-7
STD-8 Washer 2-2 STD-692 Screw 4-3
STD-8 Washer 2-4 STD-696 Washer 4-3
STD-8 Washer 2-6 STD-713 Pin 4-5
STD-8 Washer 2-8 STD-713 Pin 5-5
STD-8 Washer 4-3 STD-713 Pin 5-7
STD-8 Washer 5-2 STD-737 Key 1-10
STD-8 Washer 6-1 STD-784 Plug 2-1
STD-8 Washer 6-3 STD-784 Plug 2-6
STD-33 Washer 1-3 STD-853 Tee 6-4
STD-33 Washer 1-13 STD-872 Nut 1-13
STD-33 Washer 2-3 STD-872 Nut 5-5
STD-35 Washer 1-10 STD-872 Nut 5-7
STD-35 Washer 2-2 STD-1065 Dowel 1-7
STD-35 Washer 2-8 STD-1173 Insert 6-1
STD-35 Washer 3-9 STD-1211 Plug 1-7
STD-35 Washer 5-1 STD-1339 Plug 1-1
STD-35 Washer 5-2 STD-1409 Nut 1-13
STD-35 Washer 5-5 STD-1410 Nut 1-10
STD-35 Washer 5-7 STD-1410 Nut 2-8
STD-160 Washer 1-13 STD-1410 Nut 3-9
STD-160 Washer 2-2 STD-1410 Nut 4-1
STD-160 Washer 2-4 STD-1410 Nut 4-5
STD-160 Washer 2-6 STD-1410 Nut 5-1
STD-160 Washer 2-8 STD-1410 Nut 5-2

8-2
TEXTRON Lycoming CATALOG
PARTS
SERIES
0-540-A
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
WilliamsportPlant
NUMERICAL INDEX (Cont.)
PART NO. PART NAME PAGE NO. PART NO. PART NAME PAGE NO.

STD-1411 Nut 1-13 8313 Gasket 2-6

STD-1411 Nut 2-4 8313 Gasket 2-8
STD-1411 Nut 2-6 60009 Key 3-5
STD-1411 Nut 2-8 60096 Gasket 2-3
STD-1411 Nut 3-5 60430 Cover 2-6
STD-1411 Nut 6-1 60430 Cover 2-8
STD-1420 Nut 2-2 60803 Strap 1-13
STD-1727 Washer 4-1 60828 Plug 3-1
STD-1727 Washer 4-5 61084 Spring 1-5
STD-1727 Washer 5-5 61173 Gasket 2-4
STD-1727 Washer 5-7 61183 Gasket 2-6
STD-1774 Dowel 2-6 61247 Cover 3-9
STD-1774 Dowel 2-8 61544 Plunger 1-11
STD-1821 Hose 3-9 61681 Guide 3-3
STD-1856 Screw 2-4 62224 Gasket 4-1
STD-1872 Insert 3-3 62224 Gasket 4-5
STD-1874 Screw 4-3 62415 Plunger 2-6
STD-1882 Screw 2-3 62417 Plug 2-6
STD-1925 Screw 3-9 62817 ScreenAssy. 2-4
STD-2167 Screw 1-11 65007 Retainer 1-1
STD-2209 Bolt 1-7 65441 Seat 3-5
STD-2229 Plug 6-1 66610 Bushing 3-3
25C-9 Stud 3-3 66734 Stud 1-1
25C-10 Stud 2-4 66796 Insert 3-3
25C-11 Stud 6-1 67530 Bushing 1-11
25C-12 Stud 2-8 67536 Adapter Assy. 2-6
25C-21 Stud 2-1 67542 Bearing 4-1
31C-12 Stud 1-1 67542 Bearing 4-5
31C-12 Stud 2-1 68315 Gasket 2-8
31C-12 Stud 3-3 68593 Spacer 2-6
31C-13 Stud 1-1 68668 Spring 1-5
31C-14 Stud 1-1 68759 Tube Assy. 3-9
31C-15 Stud 6-1 68761 Tube Assy. 3-9
31C-16 Stud 1-1 68974 Housing 2-4
31C-21 Stud 2-1 69106 Cover 2-8
31CD-17 Stud 2-1 69436 Spring 2-6
38-13 Stud 1-1 69510 Housing 2-4
38-15 Stud 1-1 69531 Plate 3-7
38-15 Stud 6-1 69551 Gasket 2-8
38-22 Stud 1-1 69603 Hose 6-3
50-15 Stud 1-1 69675 Connector 2-6
1028-B Ball 1-5 69679 Stud 1-1
1102 Plug 1-1 69796 Dowel 1-1
1102 Plug 2-1 70310 Seal 3-5
1102 Plug 3-3 70384 Shaft 1-10
1102 Plug 3-5 70388 Gear 1-10
1182-B3 Spark Plug 4-3 70389 Gear 1-10
1182-B3 Spark Plug 4-5 70416 Roller 1-7
1182-Q5 Spark Plug 4-3 70455 Gasket 1-10
1182-Q5 Spark Plug 4-5 70456 Bracket 1-3

8-3
 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODELENGINES
WilliamsportPlant
NUMERICAL INDEX (Cont.)
PART NO. PART NAME PAGE NO. PART NO. PART NAME PAGE NO.

70457 Gasket 1-3 73346 Flange 6-3

70484 Screen 6-1 73383 Lockplate 5-5
70485 Pipe 6-3 73383 Lockplate 5-7
71133 Nut 3-7 73434 Rod Assy. 3-7
71134 Nut 3-7 73437 Rod Assy. 3-7
71481 Ring 3-7 73810 Bushing 1-7
71579 Belt 5-3 73818 Gasket 2-1
71596 Washer 2-6 73857 Ring 3-1
71596 Washer 2-8 73938 Valve 3-5
71600 Adapter 2-6 74065 "O" Ring 1-3
71610 Hook 3-9 74230 Guide 3-3
71611 Retainer 3-9 74241 Ring 3-1
71640 Plug 1-7 74313 Extension 1-3
71651 Fitting 2-6 74323 Strut 5-5
71652 Gear Assy. 1-11 74637 Bushing 3-7
71668 Gear Assy. 1-11 74641 Shaft 2-2
71675 Adapter Assy. 2-8 75030 Support Assy. 1-7
71699 Connection 6-1 75061 Bolt 3-1
71737 Tube Assy. 3-9 75089 Piston 3-1
71903 Bushing 1-7 75221 Support Assy. 1-7
71907 Washer 1-7 75380 Link 5-5
71973 Gasket 6-3 75675 Extension 1-3
72000 Belt 5-3 75737 Extension 1-3
72022 Roller 1-7 75761 Extension 1-3
72053 Gasket 1-10 75906 Gasket 3-9
72057 Seat 3-3 76118 Spacer 1-9
72058 Seat 3-3 76152 Housing Assy. 2-1
72060-S Bushing 1-7 76155 Shaft Assy. 1-9
72061-S Bushing 1-7 76510 Gasket 2-4
72062-S Bushing 1-7 76529 Plug 1-5
72074-S Bushing 1-7 76534 Shim 5-5
72075 Seal 1-5 76534 Shim 5-7
72091 Ring 1-5 76734 Zip Strap 4-3
72152 Baffle Assy. 3-9 76734 Zip Strap 4-5
72312 Ring 1-3 77236 Support Assy. 1-7
72351 Screw 4-3 77467 Spring 1-5
72378 Cover 1-10 77527 Extension 1-3
72566 Gear 1-7 77579 Support Assy. 1-7
72815 Bracket 4-3 77756 Bracket 5-7
72877 Body 1-5 77770 Extension 1-3
72964 GearAssy. 2-8 77852 BaseAssy. 2-4
72974 GearAssv. 2-6 77853 Housing Assy. 2-4
73000 Coupling 4-1 78290 PlungerAssy. 1-5
73000 Coupling 4-5 78446 Support Assy. 1-7
73013 Coupling 4-1 78524 Socket 1-5
73249 Washer 1-10 78531 Body 2-2
73250 Washer 1-10 78948 Elbow 2-6
73251 Washer 1-10 01L21158 Shim 5-2
73252 Washer 1-10 01L21159 Shim 5-2
73275 Belt 5-3 01L21418 Washer 1-10

8-4
 0-540-A
SERIES
PARTS
CATALOG
STANDARD
CYLINDER
FLANGE
CRANKCASE
MODEL
ENGINES
WilliamsportPlant
NUMERICAL INDEX (Cont.)
PART NO. PART NAME PAGE NO. PART NO. PART NAME PAGE NO.

06A19956 Seal 2-6 31B21064 Starter Assy. 5-2

06A19956 Seal 2-8 31D21088 HousingAssy. 5-2
06B21236 Gasket 6-1 31E21143 Motor& SolenoidAssy. 5-2
06E19769-0.63 Gasket 2-4 31E21199 Motor& SolenoidAssy. 5-2
06E19769-0.63 Gasket 2-6 32B19549 Alternator Assy. 5-3
06E19769-1.00 Gasket 6-1 32C19553 Alternator Assy. 5-3
06E19769-1.25 Gasket 1-5 36B19484 Pulley 5-3
07A19474 Bracket 5-5 37A19773-367 Belt 5-3
12A19770 Bracket 1-3 37A19773-376 Belt 5-3
13E17648 CrankshaftAssy. 1-7 53E19600 Valve Assy. 2-4
13E17649 CrankshaftAssy. 1-7 63D21408 Nipple Assy. 6-4
13E17674 CrankshaftAssy. 1-7 66JC45SDNN Magneto 4-5
13E17675 CrankshaftAssy. 1-7 66JP-OSCNN Magneto 4-5
13E17677 CrankshaftAssy. 1-7 66JR37SCNN Magneto 4-5
13S19647 Gear 1-7 66M19385 Clamp 4-1
15F19957-35 Rod Assy. 3-7 66M21195 Clamp 4-5
15F19957-36 Rod Assy. 3-7 67U20608 Harness Assy. 4-5
17C19386 Cap 3-5 67U20609 Harness Assy. 4-5
17C21191 Key 3-5 67U20612 Harness Assy. 4-5
17F19353 Rocker Assy. 3-7 67U20613 Harness Assy. 4-5
18A19441 Bearing 1-5 67U20630 Harness Assy. 4-5
18D19394 Bearing 1-5 67U20631 Harness Assy. 4-5
31A21198 Starter Assy. 5-2

8-5