Servicing Castor Wheel And Bearing; Alignment Tool - Toro 30425 Groundsmaster 4000–D Operator's Manual

4. Insert pin punch into top or bottom of bumper and drive
bushing out of tube (Fig. 19). Also drive other bushing
out of bumper. Clean inside of bumper to remove any
dirt.
Figure 19
1. Bumper
5. Apply grease to inside and outside of new bushings.
Using a hammer and flat plate, drive bushings into
bumper.
6. Inspect castor shaft for wear and replace if damaged.
7. Push castor shaft through bushings and bumper. Slide
spacers onto shaft and secure with locking cap.
Servicing Castor Wheel And
Bearing
The castor wheel rotates on a high–quality roller bearing
and is supported by a spanner bushing. Even after many
hours of use, provided that the bearing was kept well
lubricated, bearing wear will be minimal. However, failure
to keep bearing lubricated will cause rapid wear. A wobbly
castor wheel usually indicates a worn bearing.
1. Remove locknut from capscrew holding castor wheel
assembly in castor fork. Grasp castor wheel and slide
capscrew out of fork.
2. Remove outer bearing from wheel hub and allow inner
bearing to fall out (Fig. 20). Remove outer bearing from
opposite side of wheel hub.
3. Check the bearings and inside of wheel hub for wear.
Replace defective parts as required.
4. To assemble the castor wheel, push outer bearing into
wheel hub. Slide inner bearing into wheel hub. Push
other bearing into open end of wheel hub to captivate
the inner bearing inside the wheel hub.
5. Install castor wheel assembly between castor forks and
secure in place with capscrew and locknut.
2
1
2
2. Bushing
15
1
Figure 20
1. Outer bearing

Alignment Tool

If motor mount components are ever disassembled and
have to be realigned, proceed as follows:
• Loosen (4) screws and nuts securing motor mount to
mount bracket (Fig. 21).
• Loosen (4) screws, washers and nuts securing mount
bracket to bearing mount bracket (Fig. 21).
• Insert alignment tool into motor mount and secure
with (2) socket head screws and flange nuts
(Fig. 21).
• Tighten all fasteners securing motor mount, mount
bracket and bearing mount bracket.
4
3
1
2
Figure 21
1. Alignment tool
2. Motor mount
2
1
2. Inner bearing
3. Mount bracket
4. Bearing mount bracket