PVP16 - 12 Service PM1620 - 12

Bulletin PM 1620-12-M1/USA
LSHT-120A
Hydraulics
Parker Pumps
Parts & Service
Effective
Revised: November
May 1998 30,1992
PVP Series
Variable Volume
Piston Pump
Service Bulletin
Model PVP16 **** 12

Bulletin PM 1620-12-M1/USA Parker Pumps Parts & Service
Model PVP16 **** 12
WARNING
FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS AND/OR SYSTEMS DESCRIBED
HEREIN OR RELATED ITEMS CAN CAUSE DEATH, PERSONAL INJURY AND PROPERTY DAMAGE.
This document and other information from Parker Hannifin Corporation, its subsidiaries and authorized distributors
provide product and/or system options for further investigation by users having technical expertise. It is important that
you analyze all aspects of your application and review the information concerning the product or system in the current
product catalog. Due to the variety of operating conditions and applications for these products or systems, the user,
through its own analysis and testing, is solely responsible for making the final selection of the products and systems and
assuring that all performance, safety and warning requirements of the application are met.
The products described herein, including without limitation, product features, specifications, designs, availability and
pricing, are subject to change by Parker Hannifin Corporation and its subsidiaries at any time without notice.
Offer of Sale
The items described in this document are hereby offered for sale by Parker Hannifin Corporation, its subsidiaries or its authorized
distributors. This offer and its acceptance are governed by the provisions stated on the separate page of this document entitled "Offer
of Sale".
C
Copyright 1998, Parker Hannifin Corporation, All Rights Reserved
2 Parker Hannifin Corporation

Hydraulic Pump/Motor Division
Greeneville, TN 37745 USA
Table of Contents Model PVP16 **** 12
Pump Cut-A-Way .................................................................................. 4 - 5
Control Options .......................................................................................... 6
Thru Shaft Options ..................................................................................... 7
Exploded View ..................................................................................... 8 - 9
Parts List ................................................................................. 10 - 11
Service Notes ........................................................................................ 12
Basic Troubleshooting .............................................................................. 12
Offer of Sale ........................................................................................ 15
Introduction:
The PVP16 **** 12 series piston pumps are designed to provide long life while operating with Hydraulic
Oil. Refer to catalog 1550/USA for limits. However, should maintenance be required, the following
instructions should be used for disassembly, replacement of parts, cleaning and assembly.
Note:
Prior to any pump disassembly, plug the open ports and clean all dirt from the outside of
the pump.
Prior to assembly all parts should be cleaned and then lightly coated with oil.
Warning:
Protective eye wear should be worn during all maintenance procedures.

Pump Cut-A-Way Model PVP16 **** 12
Notes:
1. Make sure "R" or "L" stamped on port plate (corresponding to rotation) is by antirotation pin.
2. Installed depth of item 2 (trunnion pin) below surface of item 35 (housing) to be .050/.100 with swashplate clearance
removed by pressing "in" on pin.
3. Installed height of item 14 (servo post) above item 45 (rear cover) to be 1.538/1.534.
4. Installed height of item 29 (needle bearing) above item 45 (rear cover) to be .150/.130.
5. Illustration shows righthand (CW) rotation pump. Lefthand (CCW) pumps will have inlet and outlet ports reversed with
compensator on outlet side.

Pump Cut-A-Way Model PVP16 **** 12

Control Options Model PVP16 **** 12
Notes:
1. Must be used with proper compensator assembly. Horsepower (torque) control assembly does not include pressure
compensator assembly. For "H" option use "M" compensator, for "C" option use "A" compensator.

Thru Shaft Options Model PVP16 **** 12
Notes:
1. Shaft and cover assemblies not included in kits. They must be ordered separately.
2. Later designs incorporate a gasket, P/N 801209 rather than an O-ring.

Pump Exploded View Model PVP16 **** 12
Notes:
1. Illustration shows righthand (CW) rotation pump. Lefthand (CCW) pumps will have the compensator on opposite side,
and port plate kidneys reversed.
2. Seal kit (SKPVP16 - 12) consists of all O-rings, gaskets and shaft seal.

Pump Exploded View Model PVP16 **** 12

Parts List Model PVP16 **** 12
CAUTION
These service parts are intended for use in hydraulic
pumps. Incorrect installation or assembly of these
parts could cause the pump or pumps being repaired
to fail in subsequent use or to operate incorrectly.
The following precautions should be followed:
1. All parts should be cleaned and then lightly
coated with mineral oil, or another lubricating
fluid compatible with the system fluid being used,
prior to assembly.
2. The pump should be disassembled, repaired and
reassembled in a clean environment.
3. Use proper tools to disassemble and reassemble
the pump.
4. If you are uncertain at how to install these parts,
you should obtain assistance either from a
Parker Hannifin distributor, or from the Hydraulic
Pump/Motor Division.

Parts List Model PVP16 **** 12
Notes:
1. O-Ring compound designation =Nitrile, V = Viton.

2. For proper operation of "H" control, it must be used with a remote compensator assembly.
3. For proper operation of "C" control, it must be used with a load sense compensator assembly.
4. Seal Kit P/N SKPVP 16 12
Rotation Group Kit P/N: RRKPVP16 12
R - CW
L - CCW

Service Notes & Basic Troubleshooting Model PVP16 **** 12
Service Notes:
l Use a clean lubricant (compatible with the working
fluid) on all pump components during assembly.
l Most premature pump failures occur when
contaminants from a previous failure have not been
removed from the system, or cause for previous
failure is still present (i.e. water in oil, filter
bypassing, etc.)
l Thoroughly clean the reservoir, suction lines, suction
strainer, drain lines, etc. before re-installing the
pump.
l Always fill the pump case with clean fluid before
starting a new or serviced pump for flooded suction,
purge air from suction lines by cracking the inlet
fitting or vent plug on pump. This should prevent an
airlock condition and allow for faster priming.
l Starting the pump slowly by jogging (or turning over
engine without allowing it to start) will help the pump
prime and make it easier to determine when priming
has occurred.
l Start pump with an open circuit whenever possible.
Reduce the compensator to it's minimum setting
during start-up. Cycle the pump on and off stroke
while increasing the compensator to its required
setting.
This will assist in break-in of new components and
help purge air from the case.
Basic Troubleshooting:
Pump Will Not Prime Can Only Build A Few Hundred PSI
∆ Pump should prime within 30 seconds. If it does not, ∆ Compensator is backed all the way out.
STOP. ∆ The remote or load sense line is vented.
∆ Check for proper drive rotation. ∆ Control orifice or spool is plugged.
∆ Make sure pump shaft is turning (i.e. key at coupling ∆ Incorrect compensator spool (PVP).
hubs is engaged). ∆ Pressure control dart is lodged open.
∆ Make sure reservoir is full. ∆ Torque control plug is missing (PAVC).
∆ Check for major sources of a suction leak (vent plug
open, shaft seal missing (PAVC), flange not tight, Pump Will Not Compensate
pinched O-Ring at flange or pump housing. ∆ Differential spring over-compressed (i.e. spring
guide dislocated).
Cannot Build Any Pressure ∆ Control drain line blocked (PAVC).
∆ Make sure pump is primed. ∆ Pressure control stem vent hole is plugged.
∆ Check alignment, especially on PAVC pumps ∆ Control spool travel is hindered.
without "9" option. ∆ Control orifice is missing (PAVC).
∆ Make sure systems is not an open circuit. ∆ Saturation orifice is missing in load sense circuit.
A pump produces flow, not pressure. It can only
limit pressure when the system requirement is higher
than the pump compensator setting.

Model PVP16 **** 12
Notes:

Model PVP16 **** 12
Notes:

Offer of Sale Model PVP16 **** 12
The items described in this document and other documents or descriptions provided by Parker Hannifin Corporation, its subsidiaries and its authorized distributors are
hereby offered for sale at prices to be established by Parker Hannifin Corporation, its subsidiaries and its authorized distributors. This offer and its acceptance by any
customer (“Buyer”) shall be governed by all of the following Terms and Conditions. Buyer’s order for any such item, when communicated to Parker Hannifin Corpora-
tion, its subsidiary or an authorized distributor (“Seller”) verbally or in writing, shall constitute acceptance of this offer.
1. Terms and Conditions of Sale: All descriptions, quotations, 8. Buyer’s property: Any designs, tools, patterns, materials,
proposals, offers, acknowledgments, acceptances and sales of Seller’s drawings. Confidential information or equipment furnished by buyer, or
products are subject to and shall be governed exclusively by the terms and any other items which become Buyer’s property, may be considered
conditions stated herein. Buyer’s acceptance of any offer to sell is limited to obsolete and may be destroyed by Seller after two (2) consecutive years
these terms and conditions. Any terms or conditions in addition to, or have elapsed without Buyer placing an order for the items which are
inconsistent with those stated herein, proposed by Buyer in any acceptance manufactured using such property. Seller shall not be responsible for any
of an offer by Seller, are hereby objected to. No such additional, different or loss or damage to such property while it is in Seller‘s possession or
inconsistent terms and conditions shall become part of the contract between control.
Buyer and Seller unless expressly accepted in writing by Seller. Seller’s 9. Taxes: Unless otherwise indicated on the face hereof, all prices
acceptance of any offer to purchase by Buyer is expressly conditional upon and charges are exclusive of excise, sales, use, property, occupational or
Buyer’s assent to all the terms and conditions stated herein, including any like taxes which may be imposed by any taxing authority upon the
terms in addition to, or inconsistent with those contained in Buyer’s offer. manufacture, sale or delivery of the items sold hereunder. If any such taxes
Acceptance of Seller’s products shall in all events constitute such assent. must be paid by Seller or if Seller is liable for the collection of such tax, the
2. Payment: Payment shall be made by Buyer net 30 days from the amount hereof shall be in addition to amounts for the items sold. Buyer
date of delivery of the items purchased hereunder. Amounts not timely paid agrees to pay all such taxes or to reimburse Seller therefore upon receipt of
shall bear interest at the maximum rate permitted by law for each month or its invoice. If Buyer claims exemption from any sales, use or other tax
portion thereof that the Buyer is late in making payment. Any claims by imposed by any taxing authority, Buyer shall save Seller harmless from and
Buyer for omissions or shortages in a shipment shall be waived unless Seller against any such tax together with any interest or penalties thereon which
receives notice thereof within 30 days after Buyer’s receipt of the shipment. may be assessed if the items are held to be taxable.
3. Delivery: Unless otherwise provided on the face hereof, delivery 10. Indemnity For Infringement of Intellectual Property Rights:
shall be made F.O.B. Seller’s plant. Regardless of the method of delivery, Seller shall have no liability for infringement of any patents, trademarks,
however, risk of loss shall pass to Buyer upon Seller’s delivery to a carrier. copyrights, trade dress, trade secrets or similar rights except as provided in
Any delivery dates shown are approximate only and Seller shall have no this Part 10. Seller will defend and indemnify Buyer against allegations of
liability for any delays in delivery. infringement of U.S. patents, U.S. Trademarks, copyrights, trade dress
4. Warranty: Seller warrants that the items sold hereunder shall be and trade secrets (hereinafter “Intellectual Property Rights). Seller will
free from defects in material or workmanship for a period of 18 months from defend at its expense and will pay the cost of any settlement or damages
date of shipment from Parker Hannifin Corporation. THIS WARRANTY awarded in an action brought against Buyer based on an allegation that an
COMPROMISES THE SOLE AND ENTIRE WARRANTY PERTAINING TO item sold pursuant to this contract infringes the Intellectual Property Rights
ITEMS PROVIDED HEREUNDER. SELLER MAKES NO OTHER WAR- of a third party. Seller’s obligation to defend and indemnify Buyer is
RANTY, GUARANTEE, OR REPRESENTATION OF ANY KIND WHATSO- contingent on Buyer notifying Seller within ten (10) days after Buyer
EVER. ALL OTHER WARRANTIES, INCLUDING BUT NOT LIMITED TO, becomes aware of such allegations of infringement, and Seller having sole
MERCHANTABILITY AND FITNESS FOR PURPOSE, WHETHER control over the defense of any allegations or actions including all
EXPRESS, IMPLIED, OR ARISING BY OPERATION OF LAW. TRADE negotiations for settlement or compromise. If an item sold hereunder is
USAGE, OR COURSE OF DEALING ARE HEREBY DISCLAIMED. subject to a claim that it infringes the Intellectual Property Rights of a third
party, Seller may, at its sole expense and option, procure for Buyer the
NOTWITHSTANDING THE FOREGOING, THERE ARE NO
right to continue using said item, replace or modify said item so as to
WARRANTIES WHATSOEVER ON ITEMS BUILT OR ACQUIRED WHOLLY
make it noninfringing, or offer to accept return of said item and return the
OR PARTIALLY, TO BUYER’S DESIGNS OR SPECIFICATIONS.
purchase price less a reasonable allowance for depreciation. Notwith-
5. Limitation of Remedy: SELLER’S LIABILITY ARISING FROM standing the foregoing, Seller shall have no liability for claims of
OR IN ANY WAY CONNECTED WITH THE ITEMS SOLD OR THIS infringement based on information provided by Buyer, or directed to items
CONTRACT SHALL BE LIMITED EXCLUSIVELY TO REPAIR OR delivered hereunder for which the designs are specified in whole or part by
REPLACEMENT OF THE ITEMS SOLD OR REFUND OF THE PURCHASE Buyer, or infringements resulting from the modification, combination or use
PRICE PAID BY BUYER, AT SELLER’S SOLE OPTION. IN NO EVENT in a system of any item sold hereunder. The foregoing provisions of this
SHALL SELLER BE LIABLE FOR ANY INCIDENTAL, CONSEQUENTIAL Part 10 shall constitute Seller’s sole and exclusive liability and buyer’s sole
OR SPECIAL DAMAGES OF ANY KIND OR NATURE WHATSOEVER. and exclusive remedy for infringement of Intellectual Property Rights.
INCLUDING BUT NOT LIMITED TO LOST PROFITS ARISING FROM OR
If a claim is based on information provided by Buyer or if the
IN ANY WAY CONNECTED WITH THIS AGREEMENT OR ITEMS SOLD
design for an item delivered hereunder is specified in whole or in part by
HEREUNDER, WHETHER ALLEGED TO ARISE FROM BREACH OF
Buyer, buyer shall defend and indemnify Seller for all costs, expenses of
CONTRACT, EXPRESS OR IMPLIED WARRANTY, OR IN TORT,
or judgments resulting from any claim that such item infringes any patent,
INCLUDING WITHOUT LIMITATION, NEGLIGENCE, FAILURE TO WARN
trademark, copyright, trade dress, trade secret or any similar right.
OR STRICT LIABILITY.
11. Force Majeure: Seller does not assume the risk of and shall
6. Changes, Reschedules and Cancellations: Buyer may request
not be liable for delay or failure to perform any of Seller’s obligations by
to modify the designs or specification for items sold hereunder as well as the
reason of circumstances beyond the reasonable control of Seller (hereinaf-
quantities and delivery dates thereof, or may request to cancel all or part of
ter “Events of Force Majeure”). Events of Force Majeure shall include
this order, however, no such requested modification or cancellation shall
without limitation, accidents, acts of god, strikes or labor disputes, acts,
become part of the contract between buyer and Seller unless accepted by
laws, rules or regulations of any government or government agency, fires,
Seller in written amendment to this Agreement. Acceptance of any such
floods, delays or failures in delivery of carries or suppliers, shortages of
requested modification or cancellation shall be at Seller’s discretion, and
materials and any other cause beyond Seller’s control.
shall be upon such terms and conditions as Seller may require.
12. Entire Agreement/Governing Law: The terms and conditions
7. Special Tooling: A tooling charge may be imposed for any special
set forth herein, together with any amendments, modifications and any
tooling, including without limitation, dies, fixtures, molds and patterns,
different terms or conditions expressly accepted by Seller in writing, shall
acquired to manufacture items sold pursuant to this contract. Such special
constitute the entire Agreement concerning the items sold, and there are no
tooling shall be and remain Seller’s property notwithstanding payment of any
oral or other representation or agreements which pertain thereto. This
charges byBuyer, in no event will Buyer acquire any interest in apparatus
Agreement shall be governed in all respects by the law of the State of Ohio.
belonging to Seller which is utilized in the manufacture of the items sold
No actions arising out of the sale of the items sold hereunder or this
hereunder, even if such apparatus has been specially converted or adapted
Agreement may be brought by either party more than two (2) years after the
for such manufacture and notwithstanding any charges paid by Buyer.
cause of action accrues.
Unless otherwise agreed, Seller shall have the right to alter, discard or
otherwise dispose of any special tooling or other property in its sole
discretion at any time. FPG 9-91-P

Parker Hannifin Corporation
2745 Snapps Ferry Road
Tel. (423) 639-8151
FAX (423) 787-2418
Web site: http://www.parker.com
5/98 DBHESS 5000

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Bulletin PM 1620-12-M1/USA

Model PVP16 **** 12

2 Parker Hannifin Corporation

Pump Cut-A-Way .................................................................................. 4 - 5

Control Options .......................................................................................... 6

Thru Shaft Options ..................................................................................... 7

Exploded View ..................................................................................... 8 - 9

Parts List ................................................................................. 10 - 11

Service Notes ........................................................................................ 12

Basic Troubleshooting .............................................................................. 12

Offer of Sale ........................................................................................ 15

3 Parker Hannifin Corporation

4 Parker Hannifin Corporation

5 Parker Hannifin Corporation

6 Parker Hannifin Corporation

7 Parker Hannifin Corporation

8 Parker Hannifin Corporation

9 Parker Hannifin Corporation

10 Parker Hannifin Corporation

1. O-Ring compound designation =Nitrile, V = Viton.

11 Parker Hannifin Corporation

12 Parker Hannifin Corporation

13 Parker Hannifin Corporation

14 Parker Hannifin Corporation

15 Parker Hannifin Corporation

5/98 DBHESS 5000

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