Troubleshooting - Hydro-Gear ZT-3600 Service And Repair Manual

TROUBLESHOOTING

WARNING
Do not attempt any servicing or ad-
justments with the engine running.
Use extreme caution while inspecting
the drive belt assembly and all vehicle
linkage!
Follow all safety procedures outlined in
the vehicle owner's manual.
Possible Cause
Control linkage bent or out of adjustment
Drive belt slipping or pulley damaged
Vehicle tires improperly inflated
Control linkage bent or out of adjustment
Bypass assembly sticking
Brake Partially Engaged
Oil level low or contaminated oil
Excessive loading
Loose parts
Bypass assembly sticking
Air trapped in hydraulic system
Brake Partially Engaged
Engine speed low
Control linkage bent or out of adjustment
Drive belt slipping or pulley damaged
Oil level low or contaminated oil
Excessive loading
Bypass assembly sticking
Air trapped in hydraulic system
Brake Partially Engaged
Debris buildup around transaxle
Cooling fan damaged
Oil level low or contaminated oil
Excessive loading
Air trapped in hydraulic system
Brake Partially Engaged
Damaged seals, housing, or gaskets
Air trapped in hydraulic system
8
TROUBLE S HOOTI NG CHECKLIST
Unit Oper at e s In One Dir ection Onl y
Vehicle Does No t Drive/Tr ack St r aight
Un it Is Noisy
Un it Ha s No/Low Power
Un it Is Op er ating Hot
Tr a ns a xle Leaks Oil
In many cases, problems with a transaxle are
not related to a defective transaxle, but are
caused by slipping drive belts, partially engaged
bypass valves, and loose or damaged control
linkages. Be sure to perform all operational
checks and adjustments outlined in Service and
Maintenance, before assuming the transaxle
is malfunctioning. The table below provides a
troubleshooting checklist to help determine the
cause of operational problems.
Cor r ective Action
Repair or replace linkage, Page 9
Repair or replace drive belt or pulley, Page 9
Refer to vehicle manufacturer suggested pressure
Repair or replace linkage, Pages 9 and 13
Repair or replace bypass, Page 29
Disengage Brake, Replace Broken or Missing Brake Return Spring
Fill to proper level or change oil, Page 11
Reduce vehicle loading, Page 9
Repair or replace loose parts
Repair or replace linkage, Page 9
Purge hydraulic system, Page 12
Disengage Brake, Replace Broken or Missing Brake Return Spring
Adjust to correct setting
Repair or replace linkage, Page 9
Repair or replace drive belt or pulley, Page 9
Fill to proper level or change oil, Page 11
Reduce vehicle loading, Page 9
Repair or replace linkage, Page 9
Purge hydraulic system, Page 12
Disengage Brake, Replace Broken or Missing Brake Return Spring
Clean off debris, Page 20
Repair or replace cooling fan, Pages 22-24
Fill to proper level or change oil, Page 11
Reduce vehicle loading, Page 9
Purge hydraulic system, Page 12
Disengage Brake, Replace Broken or Missing Brake Return Spring
Replace damaged components
Purge hydraulic system, Page 12
ZT-2800 /ZT-3100 /ZT-3200 /ZT-3400
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