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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
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.
Note: 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
Note: Clean the inside of the mounting tube.
(Figure
37).
Figure 37
3. Carrier-frame-pivot tube
4. Caster wheel
(Figure
38).
1. Mounting tube
5. Grease the inside and outside of the new bushings.
Note: 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
7. Slide the caster wheel fork through the bushings in the
mounting tube.
Note: Replace the spacer(s) onto the fork and secure
with the retaining ring
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 29
mm (1.126 inch).
8. Grease the fitting on the carrier frame pivot tubes
using No. 2 general-purpose, lithium-based or
molybdenum-based grease.
Servicing the Caster Wheels
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
29
Figure 38
2. Bushing
37).
(Figure
37).
(Figure
39).
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