Servicing The Caster Wheels And Bearings; Using The Clutch Shim - Toro 74523 Operator's Manual

Servicing the Caster Wheels
and Bearings
The caster wheels rotate on a roller bearing supported by a
spanner bushing. If the bearing is kept well lubricated, wear
will be minimal. Failure to keep the bearing well lubricated
causes rapid wear. A wobbly caster wheel usually indicates a
worn bearing.
1. Remove the locknut and wheel bolt holding the caster
wheel to the caster fork
1. Locknut
2. Bushing
3. Spanner bushing
2. Remove 1 bushing, then pull the spanner bushing and
roller bearing out of the wheel hub
3. Remove the other bushing from the wheel hub and
clean any grease and dirt from the wheel hub
57).
4. Inspect the roller bearing, bushings, spanner bushing
and the inside of the wheel hub for wear.
Note: Replace any damaged or worn parts
5. Place 1 bushing into the wheel hub
6. Grease the roller bearing and spanner bushing, and
slide them into the wheel hub
7. Place the second bushing into the wheel hub
57).
8. Install the caster wheel into the caster fork and secure
it with the wheel bolt and locknut
9. Tighten the locknut until the spanner bushing bottoms
against the inside of the caster forks
10. Grease the fitting on the caster wheel.
(Figure 57).
Figure 57
4. Roller bearing
5. Caster wheel
6. Wheel bolt
(Figure 57).
(Figure
(Figure 57).
(Figure 57).
(Figure 57).
(Figure

Using the Clutch Shim

Some later model year units have been built with clutches that
contain a brake shim. When the clutch brake has worn to the
point where the clutch no longer engages consistently, you
can remove the shim to extend the clutch life.
1. Armature
2. Field shell
3. Rotor
4. Brake-mounting bolt
Removing the Clutch Shim
1. Shut off the engine, wait for all moving parts to stop,
and remove the key.
2. Engage the parking brake and wait for machine to cool
completely.
3. Using an air compressor, blow out any debris under the
brake pole and around the brake spacers.
(Figure
57).
(Figure
4. Check the condition of the wire-harness leads,
connectors, and terminals. Clean or repair them as
necessary.
5. Verify that 12 V is present at the clutch connector
when the you engage the blade-control switch (PTO).
57).
6. Measure the gap between the rotor and armature. If
the gap is greater than 1 mm (0.04 inch), proceed with
the following steps:
41
Figure 58
5. Brake spacer
6. Regap the shim.
7. Brake pole
Figure 59