Troubleshooting - Hydro-Gear ZT-5400 Powertrain Service And Repair Manual

Hydro Gear Parts or New Units Call 606-678-9623 or 606-561-4983

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.
Po s s ibl e Ca use
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 Engage
Oil level low or contaminated oil
Excessive loading
Loose parts
Bypass assembly sticking
Air trapped in hydraulic system
Brake Partially Engage
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 Engage
Debris buildup around transaxle
Cooling fan damaged
Oil level low or contaminated oil
Excessive loading
Air trapped in hydraulic system
Brake Partially Engage
Damaged seals, housing, or gaskets
Air trapped in hydraulic system
8
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Vehi cl e Do e s no t Dr i ve /Tr a ck str aig ht
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Tr a n sa x le l e a ks oil
www.mymowerparts.com
In many cases, problems with the ZT-5400
Powertrain ™ 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 ec tive Ac tio n
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 12
Repair or replace bypass, Page 23
Disengage Brake, Replace Broken or Missing Brake Return Spring
Fill to proper level or change oil, Page 10
Reduce vehicle loading, Page 9
Repair or replace loose parts
Repair or replace linkage, Page 9
Purge hydraulic system, Page 11
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 10
Reduce vehicle loading, Page 9
Repair or replace linkage, Page 9
Purge hydraulic system, Page 11
Disengage Brake, Replace Broken or Missing Brake Return Spring
Clean off debris, Page 9
Repair or replace cooling fan, Pages 17
Fill to proper level or change oil, Page 10
Reduce vehicle loading, Page 9
Purge hydraulic system, Page 11
Disengage Brake, Replace Broken or Missing Brake Return Spring
Replace damaged components
Purge hydraulic system, Page 11
ZT-5400 Powertrain