John Deere stx38 - Manual (Page 194)

5 - 30
3/21/97
DIAGNOSIS POWER TRAIN
DIAGNOSIS
Continued on page 5-32
Test Conditions:
• Tractor on level surface • Front wheels blocked
• Engine OFF • Rear wheels raised off surface with axle housings
on jack stands
Test/Check Point Normal If Not Normal
1. Drive belt. Belt in good condition, not glazed,
split, unraveled, or stretched.
Minimum width 11 mm (0.43 in.). Replace drive belt.
2. Sheaves, idlers, and belt
guides.
Sheaves, idlers and guides in good
condition.
Guides installed, properly adjusted
and tight. Replace any loose, worn, or
damaged components.
Adjust and tighten.
3. Clutch/brake pedal linkage. Clutch/brake pedal linkage adjusted
properly.
Clutch spring measurement
adjusted properly.
Adjust clutch/brake pedal linkage.
Repair or replace clutch/brake
pedal components.
Adjust rear belt idler for correct
clutch spring measurement.
4. Shift linkage. Shift linkage adjusted properly, shifts
smoothly, and obtains all gears. Adjust linkage.
Repair or replace as needed.
5. Brake assembly. Disk and pads not worn or binding. Repair or replace as needed.
6. Internal transaxle
components.
Shifts smoothly, and obtains all
gears. Repair or replace components as
needed.
7. Exterior of transaxle housing. No cracks, leaks, or loose hardware. Tighten hardware.
Repair or replace as needed.
8. Tires, wheels and axles. Tire pressure equal.
Driving tires have same radii.
Wheels not bent or out of round.
Keys, keyways and E-rings in good
shape and seated correctly.
Adjust air pressure.
Match tires for same radii.
Replace wheels.
Repair or replace as needed.