Service Manual

8 ZT-2800
®
/ZT-3100™/ZT-3400™
TROUBLESHOOTING
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.
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.
TROUBLESHOOTING CHECKLIST
Possible Cause Corrective Action
Unit Operates In One Direction Only
Control linkage bent or out of adjustment Repair or replace linkage, Page 9
Drive belt slipping or pulley damaged Repair or replace drive belt or pulley, Page 9
Vehicle Does Not Drive/Track Straight
Vehicle tires improperly inated Refer to vehicle manufacturer suggested pressure
Control linkage bent or out of adjustment Repair or replace linkage, Pages 9 and 13
Bypass assembly sticking Repair or replace bypass, Page 29
Brake Partially Engaged Disengage Brake, Replace Broken or Missing Brake Return Spring
Unit Is Noisy
Oil level low or contaminated oil Fill to proper level or change oil, Page 11
Excessive loading Reduce vehicle loading, Page 9
Loose parts Repair or replace loose parts
Bypass assembly sticking Repair or replace linkage, Page 9
Air trapped in hydraulic system Purge hydraulic system, Page 12
Brake Partially Engaged Disengage Brake, Replace Broken or Missing Brake Return Spring
Unit Has No/Low Power
Engine speed low Adjust to correct setting
Control linkage bent or out of adjustment Repair or replace linkage, Page 9
Drive belt slipping or pulley damaged Repair or replace drive belt or pulley, Page 9
Oil level low or contaminated oil Fill to proper level or change oil, Page 11
Excessive loading Reduce vehicle loading, Page 9
Bypass assembly sticking Repair or replace linkage, Page 9
Air trapped in hydraulic system Purge hydraulic system, Page 12
Brake Partially Engaged Disengage Brake, Replace Broken or Missing Brake Return Spring
Unit Is Operating Hot
Debris buildup around transaxle Clean off debris, Page 20
Cooling fan damaged Repair or replace cooling fan, Pages 22-24
Oil level low or contaminated oil Fill to proper level or change oil, Page 11
Excessive loading Reduce vehicle loading, Page 9
Air trapped in hydraulic system Purge hydraulic system, Page 12
Brake Partially Engaged Disengage Brake, Replace Broken or Missing Brake Return Spring
Transaxle Leaks Oil
Damaged seals, housing, or gaskets Replace damaged components
Air trapped in hydraulic system Purge hydraulic system, Page 12