Adjusting The Brakes - Gravely Pro 150 Owner's/Operator's Manual

ADJUSTING THE BRAKES

NOTE: The traction belt must disengage as the brake
starts to engage.
1. Turn off the engine, remove the key and allow unit
to cool.
2. If brakes do not disengage fully when traction belt
is engaged, the brakes are too tight. Loosen the
locknut.
3. If brakes do not engage fully when traction belt is
disengaged, the brakes are too loose. Tighten the
locknut.
4. Start engine and test in low gear for proper brake
engagement.
ADJUSTING PTO CLUTCH
1. Turn off engine, remove key and allow hot parts to
cool.
2. Move the PTO lever to On.
3. Loosen the two jam nuts on the rear end of the
PTO actuating rod.
4. Turn the two jam nuts forward until the gap in the
coils of the spring is approximately .030" (.76
mm).
2
3
1. PTO Actuating Rod
2. Jam Nuts
5. Lock the two jam nuts on the PTO actuating rod.
REPLACING THE TRACTION BELTS
1. Turn off the engine, remove the key and allow unit
to cool.
Brake Rod
Lock Nut
Brake Band
1
3. Spring OG0790
2. Release the steering levers.
3. Raise the rear of the unit so that the drive wheels
are off the ground.
4. Remove traction belt guard.
5. Remove clutch idler pulley spring.
WARNING: AVOID INJURY. An extension
spring, when extended, stores energy and
can be dangerous. Always use tools
specifically designed for installing or
removing an extension spring. Always
compress or extend springs slowly.
6. Remove hair pin and clevis pin holding steering
control rod to wheel clutch arm weldment.
1
2
6
1. Handlebar
2. Steering Lever
3. Steering Control Rod
4. Wheel Clutch Arm
Weldment
5. Brake Rod
7. While slowly turning the drive wheel, work the
traction belts off the transmission shaft pulley and
drive wheel.
8. Install new traction belts.
IMPORTANT: Always replace belts in sets.
9. Connect steering control rod to wheel clutch arm
weldment with clevis pin and hair pin.
10. Reinstall clutch idler pulley spring.
11. Reinstall traction belt cover.
12. Lower the unit.
13. Check adjustment of steering levers. See
Steering Lever Adjustment.
GB - 14
3
4
5
7
8
9
OG0751
6. Transmission Shaft
Pulley
7. Clutch Idler Pulley
Spring
8. Traction Belt
9. Drive Wheel