Service Manual
HTG Series Integrated Hydrostatic Transmission
4
Parker Hannifin Corporation
Hydraulic Pump/Motor Division
Greeneville, Tennessee USA
HY13-1524-002-M1/US
General Information
Introduction
The three-column format used in this Service Manual will help make it easy for you to service a HTG Series
Integrated Hydrostatic Transmission. Column one illustrates the procedure, column two gives a brief key for each
step, and column three explains in detail the procedure you should follow. Pay special attention to the notes,
cautions and warnings.
This manual contains troubleshooting information and checklists. With them you can potentially diagnose a hy-
draulic system problem without removing the HTG Transmission, the checklists will help you to determine where
the problem may be.
Item numbers on the exploded view correspond with item numbers used throughout the Service Manual. As you
gain experience in servicing HTG Transmission, you may find that some information in this Service Manual could
be clearer and more complete. If so, please contact your local dealer or OEM manufacturer's technical service
department. Don’t try to second-guess the Service Manual; if problems occur that you cannot solve, please con-
tact your local dealer or OEM manufacturer's technical service department.
Design Features
HTG Transmission
• High efficiency results in a cooler running system
• Top housing is sturdy, lightweight aluminum, excellent at dispersing heat, resulting in an overall cooler system
• High capacity thrust bearing provides longer transmission life
Torqmotor
• Roller vane to reduce friction and internal leakage and to maintain efficiency
• A patented orbiting commutator system for less wear and longer life
• A unique high-pressure shaft seal
• Manifold designed to improve operating efficiency
• Roller vane and sealed commutation assure high volumetric efficiency and smooth low speed operation
Conversions
INCHES
mm
INCHES
mm
.020
.511
1.060
26.92
.021
.531
1.295
32.89
.029
741
1.297
32.94
.030
.760
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
