Toro 30072, Руководство оператора, Страница: 28 / 44

Drive System
Maintenance
Checking the Tire Pressure
Service Interval: Every 50 hours/Monthly (whichever
comes first)
Check the pressure at the valve stem (Figure 31).
Maintain the air pressure in the rear tires at 12-14 psi
(83-97 kPa). Uneven tire pressure can cause an uneven
cut.
Note:
The front tires are semi-pneumatic tires and do
not require air pressure maintenance.
Figure 31
Replacing the Caster Wheel
Fork Bushings
The caster wheel forks are mounted in bushings pressed
into the top and bottom of the carrier frame mounting
tubes. To check the bushings, move the caster forks
back and forth and side-to-side. If a caster fork is loose,
the bushings are worn and must be replaced.
1. Disengage the blade control (PTO), set the parking
brake, stop the engine, remove the key, and
disconnect the spark plug wire from the spark plug.
2. Raise the cutting unit so the castor wheels are off
the floor, then block up the front of the mower with
jack stands.
3. Remove the retaining ring and thrust washer(s) from
the top of the castor wheel fork (Figure 32).
4. Pull the castor wheel fork out of the mounting
tube, leaving the spacer and thrust washer(s) on the
bottom of the fork.
Remember the location of the thrust washers and
spacer on each fork to ensure correct installation and
to maintain a level mower.
Figure 32
1. Retaining ring 4. Spacer
2. Thrust washer (locate as
required) 5. Caster wheel fork
3. Carrier frame mounting
tube
5. Insert a pin punch into the mounting tube and
carefully drive out the bushings (Figure 33). Clean
the inside of the mounting tube.
Figure 33
1. Mounting Tube 2. Bushing
6. Clean the inside of the mounting tube.
7. Grease the inside and outside of the new bushings.
8. Use a hammer and flat plate to carefully drive the
bushings into the mounting tube.
9. Inspect the caster wheel fork for wear and replace
if necessary (Figure 32).
10. Slide the caster wheel fork through the bushings in
the mounting tube. Replace the spacer(s) onto the
fork and secure with the retaining ring (Figure 32).
28