Figure 83
1. Castor wheel 4. Shims
2. Tensioning cap
5. Axle mounting holes
3. Spacers
Servicing the Castor Arm
Bushings
T he castor ar ms ha v e bushings pressed into the
top and bottom of the tube and after many hours
of operation, the bushings will w ear . T o c hec k the
bushings , mo v e the castor fork bac k and for th and
from side to side . If the castor spindle is loose
inside the bushings , the bushings are w or n and
m ust be re placed.
1. Raise the cutting unit so that the wheels are off
of the floor . Bloc k the cutting unit so that it
cannot accidentally fall.
2. R emo v e the tensioning cap , spacer(s), and
thr ust w asher from the top of the castor
spindle .
3. Pull the castor spindle out of the mounting
tube . Allo w the thr ust w asher and spacer(s) to
remain on the bottom of the spindle .
4. Inser t a pin punc h into the top or bottom of
the mounting tube and dri v e the bushing out
of the tube ( Figure 84 ). Also dri v e the other
bushing out of the tube . Clean the inside of
the tubes to remo v e dir t.
Figure 84
1. Castor arm tube 2. Bushings
5. Apply g rease to the inside and outside of the
new bushings . Using a hammer and flat plate ,
dri v e the bushings into the mounting tube .
6. Inspect the castor spindle for w ear and re place
it if it is damag ed.
7. Push the castor spindle through the bushings
and mounting tube . Slide the thr ust w asher
and spacer(s) onto the spindle . Install the
tensioning cap on the castor spindle to retain
all par ts in place .
Servicing the Castor Wheels
and Bearings
1. R emo v e the loc kn ut from the bolt holding the
castor wheel assembly betw een the castor fork
( Figure 85 ) or the castor pi v ot ar m ( Figure 86 ).
Grasp the castor wheel and slide the bolt out
of the fork or pi v ot ar m.
Figure 85
1. Castor wheel
3. Bearing
2. Castor fork
4. Bearing spacer
53
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