Toro Groundsmaster 5900 Series Service Manual page 425

Rear Axle Removal
Rear Axle Installation
Groundsmaster ® 5900 & 5910
16227SL Rev B
(Figure 294)
1. Park machine on a level surface, lower cutting decks, stop engine and
remove key from the key switch.
2. Chock front wheels to prevent machine from shifting.
3. Safely raise the machine and remove rear wheels (see
4. Thoroughly clean hydraulic hose ends at fittings on steering cylinders and
the hydraulic hose ends at the frame hard lines for the rear wheel motors to
prevent hydraulic system contamination.
Note: To ease assembly, label hydraulic hoses to indicate their correct
locations.
5. Disconnect the hydraulic hoses from the steering cylinders and the hydraulic
hoses at the frame hard lines for the rear wheel motors. Put caps and plugs
on all fittings and hoses to prevent contamination.
6. Remove the lock nut (item 13) and thrust washer that secures the axle pivot
shaft to the frame.
The rear axle assembly weighs approximately 136 kg (300 lbs). Use
an appropriate lifting device to safely lift the rear axle assembly.
7. Support rear axle to prevent it from falling.
8. Pull the axle pivot shaft (item 10) from frame and rear axle. Carefully lower
the entire axle assembly and remove it from under the machine. Locate
and retrieve the two (2) thrust washers (item 12) from between the machine
frame and rear axle.
Note: If service to the rear wheel motors or steering cylinders is required,
see Chapter 5: Hydraulic System (page
(Figure 294)
1. Thoroughly clean the rear axle pivot shaft. Inspect the shaft for wear or
damage and replace if necessary.
2. Position the rear axle assembly to the frame. Install a thrust washer (item
12) between each side of the axle assembly and the machine frame. Raise
axle assembly to frame and slide pivot shaft through frame, thrust washers
and axle. Make sure that roll pin on pivot shaft is in good condition and
positioned in frame reliefs.
3. Install thrust washer and lock nut (item 13) onto pivot shaft. Tighten lock nut
to eliminate any axial (front to back) movement of rear axle. Make sure that
axle can still pivot freely after lock nut is tightened.
4. Install the hydraulic hoses to the steering cylinders and the rear wheel motors.
Failure to maintain proper wheel lug nut torque could result in failure
or loss of wheel and may result in personal injury.
5. Install rear wheels. Tighten wheel lug nuts evenly in a crossing pattern from
124 to 145 N·m (92 to 108 ft−lb).
6. Lower the machine to the ground.
CAUTION
5–1).
WARNING
Page 7–11
Wheels (page 7–3)).
Chassis: Service and Repairs