20
MAINTENANCE
Figure 31
1. Spring tensioning rod (3)
1
REPLACING DRIVE BELTS
The blade drive belts, tensioned by the spring loaded
idlers, are very durable. However, after many hours of
use, the belts will show signs of wear. Signs of a worn
belt are: squealing when belt is rotating, blades
slipping when cutting grass, frayed edges, burn marks
and cracks. Replace the belt if any of these conditions
are evident.
1. Lower cutting unit to the shop floor. Remove belt
covers from top of cutting unit and set covers aside.
2. To replace gear box belt, loosen spring tension rod
and remove belt. Retention new belt to 30 lbs. Refer to
Figure 32 for belt routing.
Figure 32
3. To replace wing belts, loosen spring tension rod
and remove gear box belt.
4. Pull spring loaded idler pulley away from belt, with
hand, to relieve belt tension and remove belt. Retention
new belts to 10 lbs. Refer to Figure 32 for belt routing.
8. Reinstall belt covers.
SERVICING FRONT BUSHINGS IN
CASTOR ARMS
The castor arms have bushings pressed into the top
and bottom of the tube and after many hours of
operation, the bushings will wear. To check the
bushings, move castor fork back and forth and from
side to side. If castor spindle is loose inside the
bushings, bushings are worn and must be replaced.
1. Raise cutting unit so wheels are off floor and block
it so it cannot fall accidentally.
2. Remove tensioning cap, spacer(s) and thrust
washer from top of castor spindle.
3. Pull castor spindle out of mounting tube. Allow
thrust washer and spacer(s) to remain on bottom of
spindle.
4. Insert pin punch into top or bottom of mounting
tube and drive bushing out of tube. Also drive other
bushing out of tube. Clean inside of tubes to remove
dirt.
Figure 33
1. Front Castor Arm Tube
2. Bushings
1
2
5. Apply grease to inside and outside of new
bushings. Using a hammer and flat plate, drive
bushings into mounting tube.
6. Inspect castor spindle for wear and replace it if
damaged.
7. Push castor spindle through bushings and
mounting tube. Slide thrust washer and spacer(s) onto
spindle. Install tensioning cap on castor spindle to
retain all parts in place.
SERVICING CASTOR WHEELS AND
BEARINGS
The castor wheel rotates on a high-quality roller
bearing and is supported by a spanner bushing. Even
after many hours of use, provided that the bearing was
kept well-lubricated, bearing wear will be minimal.
However, failure to keep bearing lubricated will cause
rapid wear. A wobbly castor wheel usually indicates a
worn bearing.
To Next Page
Loading...
