DIAGNOSIS GEAR POWER TRAIN
2/12/97 5 - 13
DIAGNOSIS
Test Conditions:
• Mower on level surface
• Mower deck removed
• Engine OFF
• Front wheels blocked
• Rear wheels raised off ground with axle housings on jack stands.
• Park brake ON
Test/Check Point Normal If Not Normal
1. Inspect traction drive belt. Belt in good condition, not glazed, split,
unraveled, or stretched.
Minimum width 11 mm (0.43 in.).
Replace traction drive belt
See Repair section for removal/
installation instructions
2. Inspect engine and transaxle
sheaves, idlers and idler
bearings, and belt guides.
Sheaves, idlers and guides in good
condition.
Replace any loose, worn, or
damaged components.
(See Repair section for removal/
installation instructions)
Guides installed, properly adjusted and
tight.
3. Test drive mower up 17° slope
in first, second, third and
reverse gears.
Mower pulls up slope with no clutch
slippage (traction drive belt adjusted
properly).
Adjust traction drive belt rear idler
(See clutch actuating spring
adjustment)
4. Shift linkage adjustment. Linkage shifts smoothly, obtains all
gears & neutral (See shift linkage
adjustment section for test)
Adjust linkage. (See shift linkage
adjustment section for procedure)
5. Inspect exterior of transaxle
housing.
No cracks, leaks, or loose hardware. Repair or replace as necessary. If
case seal is leaking, reseal case
6. Perform brake test (See tests
and adjustments)
Mower holds on 17° slope, and stops in
0.9-1.5 M (3-5 ft) or less.
Go to step 7 and 8
7. Inspect brake pads & disk Pads and disks not worn beyond
specifications. Disc not rubbing on
transaxle case.
Replace pad & disk as needed. If
disk is rubbing case, rebuild
transaxle
8. Inspect brake linkage Brake spring adjustment is 7.5-8 mm
(0.30-0.32 in.)(See tests & adjustments
section)
Adjust brakes (See tests &
adjustments section)
9. Inspect rear tires Tire pressures are equal Adjust air pressure.
Tire outside diameters are equal Match tires for same size.
10. Inspect rear wheels Wheels not bent or out of round. Replace wheels.
11. Remove rear wheels and
inspect axles.
Keys, keyways and E-rings in good
shape and seated correctly.
Repair or replace as needed.
Test Conditions:
• Mower on level surface
• Front wheels blocked
• Park brake OFF
• Rear wheels raised off ground with axle housings on jack stands.
• Operator on seat, engine running at operating temperature.
1. Depress clutch pedal and shift
into all 5 speeds and reverse
Rear wheels remain still with no axle
rotation (Clutch pedal down)
Adjust clutch actuating spring.
2. Shift transaxle through gears,
using clutch to shift
Shifts smoothly, and obtains all forward
and reverse gears (both rear wheels are
being driven)
Adjust shift linkage
If still no drive, check transaxle
drive sheave shaft key, or remove
transaxle for internal inspection.
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