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Replacing the Castor Wheel
Fork Bushings
The castor wheel forks are mounted in bushings
pressed into the top and bottom of the carrier frame
mounting tubes. To check the bushings, move the
castor forks back and forth and side-to-side. If a
castor fork is loose, the bushings are worn and must
be replaced.
1.
Raise the cutting unit to the vertical position.
2.
Remove the retaining ring and thrust washer(s)
from the top of the castor wheel fork (Fig. 36).
3.
Pull the castor wheel fork out of the mounting
tube, leaving the spacer and thrust washers on
the bottom of the fork. Remember the location of
thrust washers on each fork to ensure correct
installation, and to maintain a level deck.
1
3
4
5
Figure 36
1. Retaining ring
2. Thrust Washer (4)
3. Carrier Frame Mounting
Tube
2
2
4. Spacer
5. Castor Wheel Fork
4.
Insert a pin punch into the mounting tube and
carefully drive out the bushings (Fig. 37). Clean
the inside of the 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 mounting
tube (Fig. 37).
6.
Inspect the castor wheel fork for wear and
replace if necessary (Fig. 36).
7.
Slide the castor wheel fork through the bushings
in the mounting tube. Replace the thrust
washer(s) onto the fork and secure with the
lynch pin (Fig 36).
IMPORTANT: The inside diameter of the
bushings may collapse slightly when installed.
If the castor wheel fork does not slide into the
new bushings, ream both bushings to an
inside diameter of 1.126 in. (28.6mm).
8.
Grease the fitting on the carrier frame mounting
tube using No. 2 general purpose lithium base or
molybdenum base grease.
2
1
2
Figure 37
1. Carrier Frame Mounting
Tube
Maintenance
2. Bushing
19
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