Parker Hydraulics TK Series Manual

HY13-1518-M1/USA
TK Series
Service Procedure
Hydraulics
Effective: July, 2001
Low Speed High Torque,
Hydraulic Motors

HY13-1518-M1/USA Low Speed High Torque, Hydraulic Motors
TK Series
Parker Hannifin Corporation
Hydraulic Pump/Motor Division
Greeneville, TN 37745 USA
Hydraulics
2
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.
WARNING
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 in the "Offer of Sale".


Copyright 2001 Parker Hannifin Corporation, All Rights Reserved
OfferofSale

HY13-1518-M1/USA Low Speed High Torque, Hydraulic Motors
TK Series
Parker Hannifin Corporation
Hydraulic Pump/Motor Division
Greeneville, TN 37745 USA
Hydraulics
3
Definitions...............................................................................................................................................................3
DesignFeatures......................................................................................................................................................4
Introduction .............................................................................................................................................................5
TroubleshootingGuide .............................................................................................................................................6
TroubleshootingChecklist .......................................................................................................................................7
Toolsand MaterialRequired forServicing................................................................................................................8
BoltTorque ..............................................................................................................................................................9
ExplodedAssembly View......................................................................................................................................10
TK Service Parts List Chart ..................................................................................................................................11
Disassembly & Inspection ............................................................................................................................... 12-19
TorqmotorAssembly ........................................................................................................................................ 20-27
FinalChecks.........................................................................................................................................................28
HydraulicFluid ......................................................................................................................................................28
Filtration................................................................................................................................................................28
OilTemperature .....................................................................................................................................................28
Tips for Maintaining the System............................................................................................................................29
Offer of Sale .........................................................................................................................................................31
Definitions
NOTE: A NOTE provides key information to make a procedure easier or quicker to complete.
CAUTION: A CAUTION refers to procedure that must be followed to avoid damaging the Torqmotor or other system
components.
WARNING: AWARNING REFERS TO PROCEDURETHAT MUST BE FOLLOWED FORTHE SAFETY OF THE
EQUIPMENT OPERATORANDTHE PERSON INSPECTING OR REPAIRING THE TORQMOTOR.
Disclaimer
This Service Manual has been prepared by Parker Hannifin for reference and use by mechanics who have been trained to
repair and service hydraulic motors and systems on commercial and non-commercial equipment applications. Parker
Hannifin has exercised reasonable care and diligence to present accurate, clear and complete information and instructions
regarding the techniques and tools required for maintaining, repairing and servicing the complete line of Parker TK
Torqmotor Units. However, despite the care and effort taken in preparing this general Service Manual, Parker makes no
warranties that (a) the Service Manual or any explanations, illustrations, information, techniques or tools described herein
are either accurate, complete or correct as applied to a specific Torqmotor unit, or (b) any repairs or service of a particular
Torqmotor unit will result in a properly functioning Torqmotor unit.
If inspection or testing reveals evidence of abnormal wear or damage to the Torqmotor unit or if you encounter circumstances
not covered in the Manual, STOP – CONSULT THE EQUIPMENT MANUFACTURER’S SERVICE MANUALAND WAR-
RANTY. DO NOTTRY TO REPAIR OR SERVICEATORQMOTOR UNIT WHICH HAS BEEN DAMAGED OR INCLUDESANY
PART THAT SHOWS EXCESSIVE WEAR UNLESS THE DAMAGEDAND WORN PARTSARE REPLACED WITH ORIGINAL
PARKER REPLACEMENT AND SERVICE PARTSAND THE UNIT IS RESTORED TO PARKER SPECIFICATIONS FOR THE
TORQMOTORUNIT.
It is the responsibility of the mechanic performing the maintenance, repairs or service on a particular Torqmotor unit to (a)
inspect the unit for abnormal wear and damage, (b) choose a repair procedure which will not endanger his/her safety, the
safety of others, the equipment, or the safe operation of the Torqmotor, and (c) fully inspect and test the Torqmotor unit and
the hydraulic system to insure that the repair or service of the Torqmotor unit has been properly performed and that the
Torqmotor and hydraulic system will function properly.
Table of Contents

HY13-1518-M1/USA Low Speed High Torque, Hydraulic Motors
TK Series
Parker Hannifin Corporation
Hydraulic Pump/Motor Division
Greeneville, TN 37745 USA
Hydraulics
4
Torqmotor Design Features
TK Series features include:
•The roller vane rotor set design offers low-friction and wear compensation which maximizes the useful performance
life of the motor.
•Zero leak commutation valve provides greater, more consistent volumetric efficiency.
•Heavy duty spline geometry.
•Flow thru lubrication provides cooling extending motor life.
•Full interchangeability with other motors which are designed according to industry standards.
•Compatible with most hydraulic systems with regard to pressure, torque and speed.
•A unique high-pressure shaft seal that eliminates the need for case drains.
•Up to 73 horsepower output.
•Heavy duty roller bearings for high side loads.
COUPLINGSHAFT
HIGHPRESSURESEAL
HOUSING
HEAVYDUTY
DRIVELINK
TOOTHSPLINE
DIRT&WATER SEAL
HEAVYDUTY
BEARING
MATCHEDROTORSET
HIGHSPEEDCOMMUTATOR

HY13-1518-M1/USA Low Speed High Torque, Hydraulic Motors
TK Series
Parker Hannifin Corporation
Hydraulic Pump/Motor Division
Greeneville, TN 37745 USA
Hydraulics
5
Introduction
This service manual has one purpose: to guide you in
maintaining,troubleshooting, andservicing theTK
Torqmotor(low-speed,high-torquehydraulic motor).
Material in this manual is organized so you can work on
theTorqmotorand get resultswithout wastingtime or
beingconfused.To get theseresults, you shouldread
this entire manual before you begin any work on the
Torqmotor.
Thismanual alsocontains troubleshootinginformation
and checklist. If you must service the Torqmotor, the
checklist will help you to determine where the problem
may be.
Thethree-column format of theDisassembly and
Inspection, and Assembly sections will make it easier
foryou toconduct major workon theTorqmotor.Column
1 gives a brief key for each procedure. Column 2
explainsin detailthe procedure youshould follow.
Column3 illustratesthis procedurewith photographs.
Read all material carefully and pay special attention to
the notes, cautions, and warnings.
Apage with the Torqmotor exploded assembly view is
providedseveral placesin this manual.The component
part names and item numbers assigned on this ex-
plodedassembly view correspondwith namesand item
numbers(in parentheses) usedin thedisassembly and
assembly procedures set forth in this manual.
Service part list charts are also provided in this manual
with the part names and exploded view item numbers
cross referenced to Parker service part numbers.
Serviceparts are available through theOriginal Equip-
mentManufacturer orParker approvedTKDistributors.
Asyou gainexperience inservicing theTorqmotor,you
may find that some information in this manual could be
clearer or more complete. If so, let us know about it. Do
not try to second guess the manual. If you are stuck,
contactus. ServicingtheTorqmotor should bea safeand
productiveprocedure, in orderfor theunit todeliver the
reliable,long-lifeoperationengineeredintoit.

HY13-1518-M1/USA Low Speed High Torque, Hydraulic Motors
TK Series
Parker Hannifin Corporation
Hydraulic Pump/Motor Division
Greeneville, TN 37745 USA
Hydraulics
6
NOTE:Before troubleshooting any system problem,check service literature published bythe equipment and/or
componentmanufacturers. Follow their instructions, ifgiven, for checkingany component other than theTorqmotor
unit.
Preparation
Makeyour troubleshootingeasier bypreparing as
follows:
•work in a clean, well-lighted place;
•haveproper toolsand materials nearby;
•havean adequatesupply ofclean petroleum-based
solvent.
WARNING: SINCE SOLVENTSARE FLAMMABLE, BE
EXTREMELYCAREFULWHEN USINGANYSOL-
VENT, EVENASMALL EXPLOSION OR FIRE COULD
CAUSEINJURYORDEATH.
WARNING:WEAR EYEPROTECTIONAND BESURE
TOCOMPLYWITH OSHAAND OTHER MAXIMUMAIR
PRESSUREREQUIREMENTS.
Preliminary Checks
Hydraulicsystems are often trouble-free. Hence,the
problem an operator complains of could be cause by
somethingother thanthe hydraulic components.
Thus, once you have determined that a problem exists,
start with the easy-to-check items, such as:
•parts damaged from impact that were not properly
repaired,or thatshould havebeen replaced; and
•improperreplacement partsused in previous
servicing
•mechanicallinkage problems such as binding,
broken, or loose parts or slipping belts
Hydraulic Components
If you think the problem is caused by a hydraulic
component, start by checking the easy-to-reach items.
Check all hoses and lines for cracks, hardening, or
othersigns of wear. Reroute any usable hosesthat are
kinked, severely bent, or that rest against hot engine
parts. Look for leaks, especially at couplings and
fittings. Replace any hoses or lines that don’t meet
system flow and pressure ratings.
Next, go to the reservoir and filter or filters. Check fluid
level and look for air bubbles. Check the filter(s). A filter
with a maximum 50 micron filtration is recommended for
theTorqmotorsystem.
Visually check other components to see if they are
loosely mounted, show signs of leaks, or other damage
orwear.
Excessive heat in a hydraulic system can create
problems that can easily be overlooked. Every system
has its limitation for the maximum amount of tempera-
ture. After the temperature is attained and passed, the
followingcan occur:
•oil seal leaks
•loss of efficiency such as speed and torque
•pump loss of efficiency
•pumpfailure
•hosesbecome hardand brittle
•hosefailure
Anormal temperaturerange meansan efficienthydrau-
lic system. Consult the manuals published by equip-
mentand/or componentmanufacturers formaximum
allowabletemperature and hydraulictests that may be
necessary to run on the performance of the hydraulic
components.TheTorqmotor isnot recommended for
hydraulic systems with maximum temperatures above
200°F(93.3°C).
Troubleshooting Guide

HY13-1518-M1/USA Low Speed High Torque, Hydraulic Motors
TK Series
Parker Hannifin Corporation
Hydraulic Pump/Motor Division
Greeneville, TN 37745 USA
Hydraulics
7
Troubleshooting Checklist
1.Hose fittings loose, worn or
damaged.
2.Oil seal rings(5) deteriorated by
excess heat.
3.Special bolt (1)
loose or its sealing area
deterioratedbycorrosion.
4.Internal shaft seal(18) worn or
damaged.
5.Worncoupling shaft(14) and
internalseal (18).
Oil Leakage Check& replacedamaged
fittingsor “O”Rings.Torqueto
manufacturersspecifications.
Replace oil seal rings by disassembling
Torqmotorunit.
(a) Loosen then tighten single bolt to
torquespecification.
(b) Replace bolt.
Replaceseal. DisassemblyofTorqmotor unit
necessary.
Replace coupling shaft and seal by
disassemblingTorqmotor unit.
Significant loss of
speed under load 1.Lack of sufficient oil supply
2.Highinternal motorleakage
3.Severelyworn ordamaged
internalsplines.
4.Excessive heat.
(a) Check for faulty relief valve and
adjustor replaceas required.
(b) Check forand repairworn pump.
(c) Check for and use correct oil for
temperatureofoperation.
Replaceworn rotor set by disassembling
Torqmotorunit.
Replace rotor set, drive link and coupling
shaftby disassemblingTorqmotor unit.
Locate excessive heat source (usually a
restriction) in the system and correct the
condition.
Low mechanical
efficiency or undue
high pressure
required to operate
Torqmotor unit
1.Lineblockage
2.Internalinterference
3.Lackof pumpingpressure
4.Excessive binding or loading in
systemexternal toTorqmotor
unit.
Locateblockage sourceand repairor
replace.
DisassembleTorqmotorunit, identifyand
remedycause and repair,replacing parts as
necessary.
Checkfor andrepair wornpump.
Locatesource and eliminatecause.
CAUTION: If the hydraulic system fluid becomes overheated [in excess of 200°F (93.3°C)], seals in the system
can shrink, harden or crack, thus losing their sealing ability.
Trouble Cause Remedy

HY13-1518-M1/USA Low Speed High Torque, Hydraulic Motors
TK Series
Parker Hannifin Corporation
Hydraulic Pump/Motor Division
Greeneville, TN 37745 USA
Hydraulics
8
•Clean,petroleum-basedsolvent
•Emerypaper
•Vise with soft jaws
•Airpressure source
•Arborpress
•Screwdriver
•Maskingtape
•Breakerbar
•Torquewrench-ft.lbs.(N m)
•Sockets: 1/2 or 9/16 inch thin wall, 1 inch
•Allen Sockets: 3/16, 3/8 inch
•Adjustablecrescent wrench or hose fitting wrenches
•SAE 10W40 SE or SF oil
•Specialbearing mandrelforTKTorqmotor (SEEFIGURE 1)
•Feelergage .005 inch (.13 mm)
•TKTorqmotor requiresblind hole bearing puller fora 1.750inch dia. (44.45 mm) and2.750 inchdia. (69.85 mm)
bearings.
•Cleancorrosion resistant grease. Part #406018is included in each sealkit. Recommended grease is Parker
Specification#045236 orMobil Mobilith SHC®460
NOTE: The available service seal kits include the recommended grease as a grease pack #406018
CAUTION: Mixing greases that have different bases can be detrimental to bearing life.
Tools and Materials Required for Servicing

HY13-1518-M1/USA Low Speed High Torque, Hydraulic Motors
TK Series
Parker Hannifin Corporation
Hydraulic Pump/Motor Division
Greeneville, TN 37745 USA
Hydraulics
9
CONVERSIONS
INCHES mm INCHES mm
.020 .51 1.060 26.92
.021 .53 1.295 32.89
.029 .74 1.297 32.94
.030 .76 1.396 35.46
.111 2.81 1.398 35.51
.119 3.02 1.620 41.15
.152 3.86 1.622 41.20
.160 4.06 1.983 50.37
.296 7.52 1.985 50.42
.304 7.72 2.120 53.85
.460 11.68 2.122 53.90
.470 11.94 2.233 56.72
.500 12.70 2.235 56.77
.585 14.86 2.483 63.07
.595 15.11 2.485 63.12
.660 16.76 2.500 63.5
.675 17.15 2.88 73.2
1.058 26.87
Torque Chart
Part Name Item Number Torque
bolt 3/8 24 UNF 2A 1 45-55ft. lbs.(60-76 N m)
nut 1-1/4 18 UNEF 2B 14b 350-450 ft.lbs. (475-610Nm)
(Fabricateif considerednecessary)
Figure1
Technical Information
3.60
3.122
3.120
2.748
2.746
1.748
1.746
2.988
2.986
.150
.130
.420"
.410"

HY13-1518-M1/USA Low Speed High Torque, Hydraulic Motors
TK Series
Parker Hannifin Corporation
Hydraulic Pump/Motor Division
Greeneville, TN 37745 USA
Hydraulics
10
14a 14b
23 22 21
20 19 18 16 17 16 15
14 13 12 5
11
9a
9b
9c
9
Matched
Set
10 5
875
1
2
3
4
5
6
Exploded View
Typical Assembly
Item No. Description
1 Special Bolt
2 Endcover
3 Seal Ring - Commutator
4 Commutator
5 Seal Ring
6 Manifold
7 Retaining Ring
8 Rotor Washer
9 Rotor Set
9a Rotor
9b Stator
9c Vane (9)
10 Wear Plate
11 Drive Link
12 Retaining Washer
13 Thrust Bearing
14 Coupling Shaft
14a Key
14b Nut
15 Radial Bearing
16 Thrust Washer
17 Thrust Bearing
18 Shaft Seal
19 Back Up Washer
20 Back Up Ring
21 Housing
22 Radial Bearing
23 Dirt & Water Seal
Note: See “Service Parts List Chart”page 11 for all part numbers.