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Drive System
Maintenance
Adjusting the Tracking
If the machine does not track straight, adjustment is required.
1. Check the rear tire pressure. Refer to
Pressure (page
26).
2. Loosen the wing nuts on the right control rod and
rotate the turnbuckle in or out to ensure the right
control lever is centered in the Neutral-Lock position.
3. Secure the turnbuckle in position with the wing nuts
(Figure
30).
Figure 30
1. Turnbuckle
2. Bottom wing nut
4. Loosen the wing nuts on the left control rod and rotate
the turnbuckle in or out to change the tracking.
5. Secure the turnbuckle in position with the wing nuts
(Figure
30).
6. Check for proper tracking.
7. Adjust the left control rod if a change is needed.
Checking the Tire Pressure
Service Interval: Every 50 hours or monthly, whichever
occurs first.
Check the pressure at the valve stem
Maintain the air pressure in the rear tires at 83 to 97 kPa (12
to 14 psi). Uneven tire pressure can cause an uneven cut.
Note: The front tires are semi-pneumatic tires and do not
require air pressure maintenance.
Checking the Tire
3. Top wing nut (left hand
threaded)
(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 pivot
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. Raise the cutting unit so the caster wheels are off the
floor, then support the front of the mower with jack
stands.
2. Remove the locking pin and spacer(s) from the top of
the caster wheel fork
1. Locking pin
2. Spacers
3. Pull the caster wheel fork out of the mounting tube,
leaving the spacer(s) on the bottom of the fork.
4. Note the location of the spacers on each fork to ensure
correct installation, and to maintain a level deck.
26
Figure 31
(Figure
32).
Figure 32
3. Carrier-frame pivot tube
4. Caster-wheel fork
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