Gravely 989003, Руководство по обслуживанию

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4.7 BRAKES
After each use of unit, wash dirt from brakes with water.
Each day before operation, inspect all parts and
fasteners. Repair or replace any missing, worn or
damaged brake or linkage parts. Tighten all nuts and
bolts.
Brake service is required if brakes do not stop and hold
unit effectively. Brakes should activated with 1/2"-3/4"
of foot pedal travel.
As necessary to compensate for brake lining wear,
adjust brake linkage as follows (Figure 8):
1. Stop unit on a level surface.
2. Stop engine and block wheels so unit cannot roll.
3. Remove cotter pin and clevis pin holding brake
control rod clevis to cam lever arm on the right
individual wheel brake. Loosen jam nut.
4. Turn clevis on brake control rod until correct
adjustment is achieved.
5. Fasten brake control rod clevis to cam lever arm
with clevis pin and cotter pin. Tighten jam nut.
6. Carefully test operation of right individual wheel
brake. If necessary, repeat above procedures to
get correct braking action.
7. Adjust left individual wheel brake as above so that
pedal travel is equal for both brakes.
IMPORTANT: Replace brake shoes before lining is
worn to rivet heads.
If correct braking action cannot be achieved after
performing these procedures, do the following:
1. Loosen the 5/16-24" nut and bolt which fasten cam
lever arm to brake cam.
2. Remove cam lever arm from brake cam. Rotate
cam lever arm one spine to the rear and put it back
on brake cam.
3. Tighten nut and bolt.
4. Repeat above steps if necessary.
4.8 PTO CLUTCH ADJUSTMENT
The PTO clutch adjustment should be checked every
100 hours.
To check adjustment, move PTO control lever forward
until the gaps in the clutch pac are closed (light forward
pressure on control). The PTO control lever should be
vertical (Figure 10).
NOTE: In extreme mowing conditions, it may be neces-
sary to adjust clutch tighter. If a tighter adjustment is
necessary, the PTO control lever should be approxi-
mately 10
o
from vertical when gaps in the clutch pac
are closed (Figure 10).
To adjust (Figure 11):
1. Remove access panel and push back on end of
bar spring that loads the PTO clutch until the clutch
gaps are closed. Bar spring should be straight
across frame and PTO control lever should be
vertical.
2. If bar spring does not line up with two flanges on
clutch trunnion, loosen jam nut at end of stud bolt
from PTO gearbox, turn bushing until bar is straight
across, and tighten jam nut.
3. Loosen jam nut on the PTO slide rod (which loads
bar spring), turn bushing until bar spring is straight
across, and tighten jam nut.
4. Install access panel and check the clutch
adjustment as above.
Figure 8
OF0461
1. Brake
2. Clevis Pin
3. Cotter Pin
4. Brake Control Rod
Clevis
5. Jam Nut
6. Brake Control Rod
7. Cam Lever Arm
1
2
3
4
5
6
7
Figure 9
1. Cam Lever Arm
2. Brake Cam
1
2
PF1161