BRAKE ADJUSTMENT

TM 55-1740-200-14

b. Inspect all bearings for burrs, nicks, binding or

b. Inspect pistons (17 and 45) and valve ball (15) for

excessive wear.

nicks, burrs and excessive wear.

c. Inspect all bushings for out-of-round or excessive

c. Inspect springs (4, 14, 29, 37, and 52) for breaks or

wear.

distortion.

d. Inspect springs (34 and 47) for breaks or distortion.

d. Inspect all oil passages for obstructions.

e. Inspect brake linings (35) for excessive wear.

e. Inspect shell (64) for dents.

f. Inspect brake drum (18) for deep scores or excessive

4-186. CHECKOUT. Start engine and apply and release

wear.

brakes to verify proper and prompt operation. Apply

brakes and verify no leakage from vacuum booster.

4-195. CHECKOUT. Test operate the hub assembly

while installed in tractor.

4-187. ADJUSTMENT. None required

4-196. PIVOT BEARING ADJUSTMENT. Adjust the

4-188. BRAKE ADJUSTMENT. Adjust the wheel brakes

as follows:

axle assembly pivot bearings as follows: (See figure

4-47).

a. Jack up each tractor wheel to be adjusted.

a. Jack up the wheel to be adjusted.

b. Adjust cam nut until slight drag can be felt while

NOTE

revolving wheel.

Centerline of pivot bearings should be kept as

c. Turn cam nut back until no drag can be felt while

close to perpendicular as possible to eliminate

revolving wheel.

the off-center weight effect of the wheel.

4-189. AXLE DIFFERENTIAL.

b. Remove the rim and wheel cover (1) from hub (25)

and remove the axle shaft (2). Disconnect the tie rod.

4-190. INSPECTION. See figure 4-45 and inspect the

axle differential as follows:

c. Drive wedge (77) with drift pin until a light drag

can be felt when turning hub (22) as in steering action

a. Inspect all bearings for nicks, burrs, binding or

and no play can be felt when holding the top and bottom

excessive wear.

of hub (22) and alternately pushing and pulling in

opposite directions with each hand.

b. Inspect all gears for cracked, broken or excessively

worn teeth.

d. Attach a spring scale to steering arm (66) and

simulate steering action in both directions by pulling on

c. Inspect gear (35), shaft (20) and yoke (4) for bent,

scale. Lock wedge (77) by tightening screw (73). Scale

broken or worn spline teeth.

reading should not exceed 14 pounds of even pull.

d. Inspect seal (5) for deterioration or excessive wear.

4-197. FRAME AND BRACKETS ASSEMBLY.

4-191. CHECKOUT. Test operate the axle differential

4-198. INSPECTION. See figure 4-49 and inspect the

while installed in tractor.

frame and brackets as follows:

4-192. ADJUSTMENT. Adjustment of axle differential

a. Inspect spring assembly for cracked or damaged leaf

is accomplished during reassembly.

springs (63 through 73), bushings (62) and rollers (54).

4-193. HUB ASSEMBLY.

b. Inspect frame rails and all brackets, bushings and

braces for cracks, breaks or distortion.

4-194. INSPECTION. Refer to figure 4-47 and inspect

the hub assembly as follows:

c. Inspect entire assembly for loose or missing

attaching hardware.

a. Inspect axle shaft for cracked or twisted spline.

4-15