Service Brake Master Cylinder

(4) If above steps do not provide proper braking

(6) Remove nut and clevis from master cylinder.

action, adjust cable.

(5) Refer to figure 3-51 and remove cotter pin,

washer, and clevis pin securing clevis to cam lever.

(6) Loosen clevis locknut and turn clevis three

or four turns clockwise on cable. Install clevis on

cam lever and engage brake.

(7) Check braking action and adjust cable (6

above) until action is correct.

(8) Tighten locknut to secure adjustment.

3-62. Service Brake Pedal and Linkage

a. General. The service brake pedal (fig. 2-2) and

inching pedal are mounted on a common shaft. De-

pressing the brake pedal actuates the master

cylinder. Depressing the inching pedal operates the

inching valve in the transmission control. Further

depression of inching pedal will depress the brake

pedal and operate the service brakes.

b. Brake Pedal Adjustment. Refer to figure 3-52

Figure 3-52. Service brake pedal

and adjust the brake pedal travel as follows:

adjustment

(1) Pedal free play should be adjusted to one-

b. Installation. Refer to figure 3-53 and install

half inch travel to allow master cylinder piston to re-

the master cylinder.

turn to off position and reduce unusable length of

(1) Install clevis and nut on master cylinder push

stroke in the master cylinder.

rod.

(2) Remove the floor plate.

(3) Slowly depress the brake pedal and check

free travel. Observe push rod action at master cylin-

der.

(4) If free travel is more or less than one-half

inch, loosen locknut on clevis at master cylinder and

turn adjusting nut to adjust travel in direction re-

quired.

(5) After adjustment, check travel. When travel

is within limits, tighten locknut.

(6) Depress inching pedal. At lower end of travel,

inching pedal should contact brake pedal and apply

brakes.

(7) If inching pedal adjustment is required refer

to direct and general support personnel.

3-63. Service Brake Master Cylinder

a. Removal. Refer to figure 3-53 and remove the

brake master cylinder as follows:

(1) Remove the floor plate.

(2) Disconnect wires and remove stop light

switch from master cylinder.

(3) Disconnect hydraulic oil line from master

cylinder.

(4) Remove cotter pin and clevis pin and dis-

connect clevis from brake pedal push rod.

(5) Remove two screws and lock washers securing

Figure 3-53. Service brake master

master cylinder to frame and remove master cylinder.

cylinder, installed view.

3-46