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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 37).
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 38). Clean the inside of
the mounting tube.
Figure 37
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 37).
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 37).
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 39).
29
Figure 38
2. Bushing
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