Servicing The Castor Arm Bushings - Toro 31598 Operator's Manual

6. Adjust the other set of nuts to raise or lower the rear
of the cutting unit and attain the correct cutting unit
pitch.
7. Tighten the jam nuts.
Figure 95
1. Height-of-cut chain
2. U-bolt
Adjusting the Side Cutting Units
1. Remove the tensioning cap from the castor spindle
shaft and slide the spindle out of the castor arm
(Figure 96). Reposition the shims, as required, to
raise or lower the castor wheel until the cutting unit
has the correct pitch.
2. Install the tensioning cap.
3. Nut (2)
1. Tensioning cap
2. Spacers
3. Shims
Servicing the Castor Arm
Bushings
The castor arms have bushings pressed into the top and
bottom of the tube and after many hours of operation,
the bushings will wear. To check the bushings, move the
castor fork back and forth and from side to side. If the
castor spindle is loose inside the bushings, the bushings
are worn and must be replaced.
1. Raise the cutting unit so that the wheels are off of
the floor. Block the cutting unit so that it cannot
accidentally fall.
2. Remove the tensioning cap, spacer(s), and thrust
washer from the top of the castor spindle.
Note: Record the position of the washers and
spacers before removal so the deck pitch does not
have to be readjusted.
3. Pull the castor spindle out of the mounting tube.
Allow the thrust washer and spacer(s) to remain 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 97). Also drive the other bushing out of the
tube. Clean the inside of the tubes to remove dirt.
63
Figure 96
4. Top axle mounting hole
5. Castor wheel