Transaxle Troubleshooting - Gravely Promaster 400 Service Manual

6.12 TRANSAXLE TROUBLESHOOTING

CAUSE
Unit Cannot Be Shifted (Or Difficult To Shift)
Gears improperly installed
Forks and rod assembly incorrectly installed
Axle Housing not installed or not tightened
Same items covered under heading, "Axles
cannot be turned (same direction) while unit is
in neutral gear:
Shifting lever improperly positioned
Shift lever housing misaligned to case
Parts missing
Equipment clutch not disengaged
Shifter stop assembled backwards
Chamfer on shift gears on wrong side
Improper fit of case to cover
Dowel pins not installed
Gears improperly installed
Input shaft not properly installed
Differential installed improperly
Seal retainers improperly positioned
Unit Is Noisy
Gearing is overly noisy - chatter, etc.
Metallic pieces and/or other foreign objects in
unit
Worn gears
Worn bearings - mainly input shaft ball bearing
Unit Jumps Out Of Gear
Shifting lever improperly assembled in housing
Teeth of gears are worn beyond tolerances
Spring in shifter fork weak or broken
Attaching screws for shift lever and housing
assembly not properly torqued
Review positioning of gearing.
Remove assembly. Recheck and correctly position parts.
Seal retainers are not properly sealed. Tighten axle housing bolts.
Review remedy listed
Determine if finger of shifting lever is correct for the unit and is correctly
installed. Make sure shift lever housing has required gasket.
Check if alignment marks on the unit are correctly positioned. Also,
determine if bend on shaft is in correct position.
Install missing parts
Adjust clutch according to equipment instruction.
Determine that notch in STOP aligns with shifter forks in NEUTRAL
position.
Check that bevels on shifter gears are correct (fork flanges should be
toward each other). On 3 gear cluster, small gear and medium gear
chamfers go down toward big gear.
Recheck positioning of thrust washers. A misplacement or omission of
washer can cause binding.
Check unit for correct assembly of parts.
Check unit for correct assembly of parts.
Input shaft spline must be fitted into gear and must be tapped completely
into the case.
Re-check positioning of bolts in differential - must be opposite output shaft
gear
Check that seals are correctly installed
Check oil level.
Remove bits of broken metal, loose washers, etc.
Remove and replace with new gears.
Replace bearing.
Disassemble shifting lever and check for proper assembly.
Replace worn gears.
Replace spring.
Torque screws to 10 ft-lbs (44.5 Nm).
6 - 30
REMEDY