Servicing The Caster-Arm Bushings - Toro Groundsmaster 4000 Operator's Manual

Figure 121
1. Height-of-cut chain
Adjusting the Side Cutting Unit
Pitch
Service Interval: Every 800 hours
1. Remove the tensioning cap from the spindle
shaft and slide the spindle out of the caster arm
(Figure 122).
Note:
Position the shims, as required, to raise
or lower the caster wheel until the cutting unit
has the correct pitch.
Figure 122
1. Tensioning cap
2. Spacers
3. Shims
2. Install the tensioning cap.
g011490
2. U-bolt
g008866
4. Axle-mounting holes
5. Caster wheel
Servicing the Caster-Arm
Bushings
The caster arms have bushings pressed into the
top and bottom of the tube and after many hours of
operation, the bushings develop wear. To check the
bushings, move the caster fork back and forth and
from side to side. If the caster spindle is loose inside
the bushings, the bushings are worn and must be
replaced.
1. Raise the cutting unit so the wheels are off the
floor and block the cutting unit so it cannot fall.
2. Remove the tensioning cap, spacer(s), and
thrust washer from the top of the caster spindle.
3. Pull the caster spindle out of the mounting tube.
Note:
Keep the thrust washer and spacer(s) on
the bottom of the spindle.
4. Insert a pin punch into the top or bottom of the
mounting tube and drive the bushing out of the
tube (Figure 123).
Note:
Also drive the other bushing out of the
tube. Clean the inside of the tubes to remove
dirt.
1. Caster-arm tube
5. Apply grease to the inside and outside of the
new bushings.
6. Using a hammer and flat plate, drive the
bushings into the mounting tube.
7. Inspect the caster spindle for wear and replace
it if it is damaged.
8. Push the caster spindle through the bushings
and mounting tube.
9. Slide the thrust washer and spacer(s) onto the
spindle and install the tensioning cap on the
caster spindle to retain all parts in place.
77
Figure 123
2. Bushings
g004737