TOPIC 5. BLEEDING THE BRAKE SYSTEM

TM 10-3930-644-14&P

Figure 11. Brake Shoe Components

e. Replace brake drum on differential pinion

h. Replace clevis pin and cotter pin which

shaft, then install lockwashers, capscrews

secure parking brake cable to brake lever.

and lockwire

h. Ensure that parking brake unit has been

f. Install universal joint.

completely reassembled, then replace

floor and toe plates.

TOPIC 5. BLEEDING THE BRAKE SYSTEM

A. REASON FOR BLEEDING BRAKES

5. Overheating of brakes caused under severe

operating conditions could cause gassing or

Brakes must be bled after any of the following

boiling of fluid, thereby creating a vapor lock and

occurrences:

giving a spongy pedal.

1. Brake system is drained and refilled with new

B. BLEEDING SEQUENCE

fluid.

1. Fill master cylinder to proper level (3/8" to 1/2"

2. Some part of

the

system

has

been

from reservoir top).

disconnected.

CAUTION

3. Neglect in maintaini ng proper fluid level in

Due to importance of fluid used in

master cylinder has allowed air to enter system.

brake system, use only premium

quality, heavy duty brake fluid with

4. Air leakage past master cylinder secondary cup

an extreme heat-cold range that

or wheel cylinder cups due to wear, or to a

conforms

SAE

specification

vacuum maintained within the cylinder by a

J1703C.

plugged filler cap vent.

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