Manual Brake; Adjustment Of Brake Pedal; Maintenance - Yale A7S1 Service Manual

Brake System

MANUAL BRAKE

The manual brake uses a pull handle. With the foot
brake, it employs an automatic power brake that stops
the front wheels. Only when the truck has been
parked, can the manual parking brake be used.
Before adjusting the parking brake, test to confirm the
drive axle braking system functions properly:
1. Adjust the lock nut (item 5, Figure 29) so the
length is equal to 68 mm (2.7 in.). Tighten the
lock nut.
2. Turn the nut (item 7, Figure 29) to adjust the
parking brake's pulling force to
147-196 N•m (108.4-144.6 lbf ft).
3. After the manual brake lever is correctly adjusted,
release the lever to release the brake.
4. Ensure that the parking brake is functioning
properly.
NOTE: Coat appropriate amount of lithium base
grease onto the guide rail (item 6, Figure 29) and
apply regularly.
1. BRAKE CABLE
2. BRAKING ROPE
3. DISPLAY
BRACKET
4. PARKING BRAKE
LEVER
Figure 29. Parking Brake
32
5. LOCK NUT
6. GUIDE RAIL
7. NUT

ADJUSTMENT OF BRAKE PEDAL

1. Adjust the limit bolts to the pedal location shown
in Figure 30. Confirm the distance between the
front floor and the brake pedal is 113 mm (4.4 in.)
and the pedal stroke is 20 mm (0.8 in.). Tighten
the limit bolts.
1. OIL TANK
2. LIMIT BOLT
3. PEDAL
Figure 30. Adjustment of Brake Pedal

MAINTENANCE

This section covers brake disassembly, reassembly,
and adjustment. The following procedures describe
steps for servicing a 2-2.5T brake. Brakes for 3-3.5T
are similar.
8000 YRM 2199
4. INCHING VALVE
5. BRAKE MASTER
PUMP