Service Manual
HTG Series Integrated Hydrostatic Transmission
8
Parker Hannin Corporation
Hydraulic Pump/Motor Division
Greeneville, Tennessee USA
HY13-1524-002-M1/US
General Information
Problem/ Symptom What to Check/ Look For/ Look At Potential Repair Fix Dealer Fix
If In Warranty
Replace
Transmission
Lack of control/jerky
control
Proper tire pressure Refer to OEM owners manual- Verify proper
tire inflation, adjust as necessary
X
NOTE: Refer to owners manual
for proper transmission fluid
and fill volume.
Inspect control linkage dampeners Inspect dampener for smooth and proper
range of motion, replace as necessary
X
Loose control lever/ linkage Verify linkage connections, repair as
necessary
X
RTN function Verify RTN bolt torque, RTN adjustment,
repair as necessary
X
Belt tension Refer to OEM owners manual- verify proper
tension, adjust as necessary
X
Proper engine governor speed control
(fluctuating RPM)
Refer to OEM owners manual- verify RPM,
adjust as necessary
X
Brake Drag Refer to OEM owners manual- for proper
specified brake adjustment
X
Loose lug nuts Refer to OEM owners manual- for proper
torque specification
X
Output axle shaft castle nut is loose Inspect shaft, threads, and hub for dam-
age, repair as necessary, and re-torque to
proper torque specification
X
Internal components of transmission are
damaged
Remove transmission, dis-assemble,
repair/ replace as necessary
X
Noisy Unit
Low fluid level Refer to OEM owners manual- Check and fill
as necessary
X
NOTE: Verify location of
the noise- engine/ deck/
transmission
Contaminated fluid/ filter clog Drain fluid, remove transmission, dis-
assemble and inspect components for
damage, re-assemble, install new filter,
re-fill oil
X
NOTE: Refer to owners manual
for proper transmission fluid
and fill volume.
Internal components of transmission are
damaged
Remove transmission, dis-assemble,
repair/ replace as necessary
X
Miscellaneous
Lack of brake holding power Refer to OEM owners manual- for proper
specified brake adjustment
X
Troubleshooting Checklist (page 3 of 3)