Figure 10. Adjustment at Brake Shoes

TM 10-3930-644-14&P

b. Remove toe and floor plates.

c. Remove cotter pin and clevis pin securing

brake cable to brake lever d. Remove

universal joint e.

Remove lockwire,

capscrews, and lockwashers and remove

brake drum from differential pinion flange.

f. Remove cotter pin and nut, then remove

hub from pinion shaft.

g. Remove brake lever and rollers from

backing plate h. Remove brake shoe

return springs and slide shoe and lining

assembly off backing plate.

i. Remove capscrews, lockwasher.

and

backing plate from differential carrier

housing assembly

2. Inspection

Figure 10. Adjustment at Brake Shoes

a. Check backing pate for distortion, loose or

sheared rivets, and worn pawls.

1. Remove adjusting knob lockscrew from parking

brake handle and back off knob four or five

turns. Brake must be in OFF position during

b. Check brake lining for wear or grease

saturation.

adjustment.

2. Remove floor plate.

c. Check brake shoes for worn pawl holes,

lever contact areas, or wear pads.

3. Remove clevis pin from yoke and loosen yoke

locknut.

d. Check brake drum for cracks, scoring, or

other damage. Replace damaged parts e.

Always replace shoe return springs during

4. Turn yoke la clockwise direction to shorten

length of cable Generally three or four turns will

reassembly

be sufficient.

3. Reassembly and Installation

5. Install yoke on brake lever and check

Reassembly and installation is the reverse of

adjustment by engaging hand brake handle. If

removal .and disassembly with the exception of

necessary, make further adjustment to yoke to

make certain brake shoes do not drag when

lightly coating the wear pans and pawls on the

backing plate, the lever, and the brake shoe

disengaged.

wear points with lubricant. Avoid excessive

6. After satisfactory, adjustments made, tighten

lubricant as grease soaked linings are

dangerous.

yoke locknut;: install cotter pin in yoke clevis

pin. Install locking screw in adjusting knob of

parking brake handle.

a. Replace backing plate, lockwashers

and

capscrews on differential carrier housing.

D. BRAKE SHOE REPLACEMENT

b. Slide shoe and lining assembly on backing plate

and replace brake shoe return springs.

When excessive adjustment is needed on parking brake

linkage, or when parking brake becomes ineffective in

holding truck securely, the brake shoes should be

c. Install brake rollers and brake lever on backing

plate.

checked and, if necessary, replaced. To check or

replace parking brake shoes the following procedure is

recommended:

d. Replace hub on pinion shaft and install nut and

cotter pin.

1. Removal and Disassembly

a. Place blocks ;a front and behind one of

the list truck wheels

3-154