Maintenance
21
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 washers 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).
5.
To assemble, place one (1) bushing into the
wheel hub. Grease the roller bearing and spanner
bushing and slide them into the wheel hub. Place
the second bushing into the wheel hub (Fig. 35).
6.
Install wheel bolt, (2) washers per side, and
castor wheel into the castor fork. Secure with
locknut and tighten until the spanner bushing
bottoms against the inside of the castor forks
(Fig. 35).
7.
Grease the fitting on the castor wheel.
1
2
3
4
5
6
4
3
Figure 35
1.
Locknut
2.
Wheel Bolt
3.
Washer (4)
4.
Bushing
5.
Spanner Bushing
6.
Roller Bearing
