Replacing The Castor Wheel Fork Bushings - Toro 78478 Operator's Manual

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Figure 38
1. Locknut
2. Pulley
3. Bearing
4. Spindle Shaft
5. Spindle Housing
Replacing the Castor Wheel
Fork Bushings
The castor wheel forks are mounted in bushings pressed
into the top and bottom of the carrier frame mounting
tubes. To check the bushings, move the castor forks back
and forth and side-to-side. If a castor fork is loose, the
bushings are worn and must be replaced.
1. Raise the cutting unit so the castor wheels are off the
floor, then block up the front of the mower with jack
stands.
2. Remove the retaining ring and thrust washer(s) from the
top of the castor wheel fork (Fig. 39).
3. Pull the castor wheel fork out of the mounting tube,
leaving the thrust washers on the bottom of the fork.
Remember the location of thrust washers on each fork
to ensure correct installation, and to maintain a level
deck.
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6. Housing bolts
7. Spindle cup
8. Washer
9. Blade
10. Blade bolt
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Figure 39
1. Retaining ring
2. Thrust Washer (4)
4. Insert a pin punch into the mounting tube and carefully
drive out the bushings (Fig. 40). Clean the inside of the
mounting tube.
5. Grease the inside and outside of the new bushings. Use
a hammer and flat plate to carefully drive the bushings
into the mounting tube (Fig. 40).
6. Inspect the castor wheel fork for wear and replace if
necessary (Fig. 39).
7. Slide the castor wheel fork through the bushings in the
mounting tube. Replace the thrust washer(s) onto the
fork and secure with the lynch pin (Fig 39).
Important The inside diameter of the bushings may
collapse slightly when installed. If the castor wheel fork
does not slide into the new bushings, ream both bushings to
an inside diameter of 1.126 in. (28.6mm).
8. Grease the fitting on the carrier frame mounting tube
using No. 2 general purpose lithium base or
molybdenum base grease (Fig. 40).
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3. Carrier Frame Mounting
Tube
4. Castor Wheel Fork