Adjusting The Caster Pivot Bearing; Servicing The Caster Wheel And Bearings - Toro 74538 Operator's Manual

Figure 59
Adjusting the Caster Pivot
Bearing
Service Interval: Every 500 hours/Yearly (whichever
comes first)
1. Disengage the blade control switch (PTO), move the
motion control levers to the neutral locked position
and set the parking brake.
2. Stop the engine, remove the key, and wait for all
moving parts to stop before leaving the operating
position.
3. Remove the dust cap from caster and tighten lock
nut (Figure 60).
4. Tighten the locknut until the spring washers are flat
and then back off a 1/4 turn to properly set the
pre-load on the bearings (Figure 60).
Important: Make sure spring washers are
installed correctly as shown in Figure 60.
5. Install the dust cap (Figure 60).
1. Spring Washers
2. Lock Nut
Servicing the Caster Wheel
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 will cause 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 (Figure 61).
1. Locknut
2. Wheel Bolt
3. Bushing
42
Figure 60
3. Dust Cap
Figure 61
4. Spanner Bushing
5. Roller Bearing