CHAPTER 4 REPAIR OF BRAKES

TM 10-3930-631-34

CHAPTER 4

REPAIR OF BRAKES

Section I. PARKING BRAKE

and the truck circuits are closed, allowing the truck to be

4-1. Description

operated.

a. The parking brake on the lift truck is of the disk

4-2. Parking Brake Repair

and caliper type. The disk is attached to the rear of the

a. Removal.

drive motor shaft. A caliper assembly containing the

(1) Remove the floor and toe plates and sheet

brake pads is mounted on the motor frame, with the disk

metal cover from below seat.

rotating between the pads. Actuation of the brake is

accomplished through linkage attached to the hinged

CAUTION

operator's seat.

Before

performing

removal

procedure,

b. The brake is set through the action of a large

disconnect battery receptacle and discharge

spring mounted at the lower end of the linkage. When

capacitors.

the seat is not occupied the spring forces the linkage

(2) Use a suitable hoist to lift the front end of the

down and the cam action of the actuating lever forces

truck and raise truck sufficiently to allow access to

the pad against the disk, locking the drive train.

parking brake. Remove drip pan.

c. A seat switch, normally open, is actuated by the

(3) Remove lock nut, washer, and shoulder

linkage. The switch, when open, prevents operation of

screw (1, fig. 4-1). to disconnect linkage from caliper

electrical circuits on the truck. When the seat is

actuating lever.

occupied the parking brake is released

4-1