Service manual

Groundsmaster 3280−D/3320 Page 7 − 15 Chassis
Rear Wheel Bearings (2 Wheel Drive)
NOTE: For repair information regarding the rear axle
on 4 wheel drive machines, refer to Chapter 8 − Drive
Axles.
Disassembly (Fig. 7)
1. Jack up the rear of the machine until the tire is off the
floor. Support the machine with jack stands or blocks to
prevent it from falling.
2. Remove the rear wheel (see Wheels in this section).
3. Remove the dust cap from the wheel hub.
4. Remove the cotter pin, retainer, jam nut and tab
washer. Slide the wheel hub from the spindle shaft.
5. Pull the seal out of the wheel hub. Discard seal.
6. Remove the bearing cones from both sides of the
wheel hub. Clean the bearings in solvent. Make sure the
bearings are in good operating condition. Clean the in-
side of the wheel hub. Check the bearing cups for wear,
pitting or other noticeable damage. Replace worn or
damaged parts.
Assembly (Fig. 7)
1. If bearing cups were removed from the wheel hub,
press them into the hub until they seat against the shoul-
der of the hub.
IMPORTANT: The seal must be pressed in so it is
flush with the end of the wheel hub. The lip of the
seal must be toward the bearing.
2. Pack both bearings with grease. Install one bearing
into the cup on inboard side of the wheel hub. Lubricate
the inside of the new seal and press it into the wheel hub.
3. Pack inside of wheel hub with some grease (not full).
Position remaining bearing into the outer bearing cup.
4. Slide the wheel hub assembly onto the spindle shaft
and secure it in place with the tab washer and jam nut.
DO NOT tighten the nut or install the cotter pin.
5. Rotate the wheel hub by hand and tighten the jam nut
from 75 to 100 in-lb (8.5 to 11.3 N−m) to set the bearings.
Then, loosen the nut until the hub has endplay.
6. Rotate the wheel hub by hand and tighten the jam nut
from 15 to 20 in-lb (1.7 to 2.3 N−m). After final tightening,
make sure that the wheel hub does not have any free
play.
7. Install retainer with slot aligned to cotter pin hole in
spindle. Install cotter pin.
8. Install dust cap.
9. Install rear wheel (see Wheels in this section).
10.Remove jack stands or blocks and lower machine to
floor.
1. Dust cap
2. Cotter pin
3. Retainer
4. Jam nut
5. Tab washer
6. Bearing cone
7. Bearing cup (2 used)
8. Wheel hub
9. Seal
Figure 7
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Chassis