Servicing The Castor Wheels And Bearings - Toro 74191 Operator's Manual

4. Insert a pin punch into the mounting tube and
carefully drive out the bushings (Fig. 34). 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. 34).
6. Inspect the castor wheel fork for wear and
replace if necessary (Fig. 33).
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 33).
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 34
1. Carrier Frame Mounting
Tube
2. Bushing
Servicing the Castor Wheels
and Bearings
The castor 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 castor wheel usually indicates a worn
bearing.
1. Remove the locknut and wheel bolt holding the
castor wheel to the castor fork (Fig. 35).
2. Remove the washer and bushing, then pull the
spanner bushing and roller bearing out of the
wheel hub (Fig. 35).
3. Remove the other bushing from the wheel hub
and clean any grease and dirt from the wheel hub
(Fig. 35).
4. Inspect the roller bearing, bushings, spanner
bushing and inside of the wheel hub for wear.
Replace any defective or worn parts (Fig. 35).
Maintenance
39