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Replacing the Caster Wheel
Fork Bushings
The caster wheel forks are mounted in bushings pressed
into the top and bottom of the carrier frame mounting
pivot tubes. To check the bushings, move the caster
forks back and forth and side-to-side. If a caster fork is
loose, the bushings are worn and must be replaced.
1. Raise the cutting unit so the caster wheels are off
the floor, then support the front of the mower with
jack stands.
2. Remove the locking pin and spacer(s) from the top
of the caster wheel fork (Figure 43).
1. Locking Pin
2. Spacers
3. Pull the caster wheel fork out of the mounting tube,
leaving the spacer(s) on the bottom of the fork.
Remember the location of the spacers on each fork
to ensure correct installation, and to maintain a level
deck.
4. Insert a pin punch into the mounting tube and
carefully drive out the bushings (Figure 44). Clean
the inside of the mounting tube.
Figure 43
3. Carrier frame pivot tube
4. Caster wheel
1. Mounting Tube
5. Grease the inside and outside of the new bushings.
Use a hammer and flat plate to carefully drive the
bushings into the pivot tubes.
6. Inspect the caster wheel fork for wear and replace
if necessary (Figure 43).
7. Slide the caster wheel fork through the bushings in
the mounting tube. Replace the spacer(s) onto the
fork and secure with the retaining ring (Figure 43).
Important: The inside diameter of the bushings
may collapse slightly when installed. If the
caster wheel fork does not slide into the new
bushings, ream both bushings to an inside
diameter of 1.126 inch (29 mm).
8. Grease the fitting on the carrier frame pivot tubes
using No. 2 general purpose lithium base or
molybdenum base grease.
Servicing the Caster Wheel
and Bearings
The caster wheels rotate on a roller bearing supported by
a spanner bushing. If the bearing is kept well lubricated,
wear will be minimal. Failure to keep the bearing well
lubricated will cause rapid wear. A wobbly caster wheel
usually indicates a worn bearing.
1. Remove the locknut and wheel bolt holding the
caster wheel to the caster fork (Figure 45).
31
Figure 44
2. Bushing
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