Checking The Tire Pressure; Adjusting The Caster-Pivot Bearing; Servicing The Caster Wheels And Bearings - Toro GrandStand 74549 Operator's Manual

Checking the Tire Pressure

Service Interval: Every 50 hours/Monthly (whichever
comes first)
Maintain the air pressure in the rear tires at 83 to 97 kPa (12
to 14 psi).
Important: Uneven tire pressure can cause an uneven
cut.
Note: The front tires are semi-pneumatic tires and do not
require air-pressure maintenance.
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 the caster and tighten the
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 preload
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).
Figure 59
1. Spring washers
2. Locknut
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
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