Section X. WHEELS

TM 10-3930-628-12

(1) Refer to figure 4-21 and assemble adjuster

(4) Refer to paragraph 4-39 and install front

assembly as follows:

drive wheels.

(a) Install slide assemblies (I) with nylon

4-37. Service Brake Wheel Cylinder

washers (2) between slides.

a. Removal.

(b) Secure slides with screws (5), nuts (6) and

(1) Refer to paragraph 4-36 and remove brake

washers (3 and 4). Tighten only finger tight.

shoes.

(2) Refer to figure 4-18 and remove wheel

center distance of holes in ends of slides is 51/4 inches.

cylinder as follows:

(d) Tighten screws (5) to a torque of 14 to 16

(a) Disconnect brake line from fitting in wheel

pound-inches.

cylinder.

(e) Hold screws in position and tighten nuts (61

(b) Remove two screws and lock washers

to a torque of 29 pound-inches.

securing cylinder to backing plate and remove wheel

(f) Check slip resistance of slide assemblies.

cylinder.

Resistance must be 250 to 300 pounds.

b. Installation.

(2) Refer to figure 4-20 and install brake shoes

(1) Refer to figure 4-18 and install wheel

as follows:

cylinder on brake backing plate as follows:

(a) Install wheel cylinder links on bottom of

(a) Install wheel cylinder on backing plate and

brake shoes and-secure links with pins.

secure with two screws and lock washers.

(b) Install adjuster assembly on brake shoes

(b) Connect brake line to fitting in wheel

and secure to brake shoes with spring pins.

cylinder.

(2) Refer to paragraph 4-36 and install service

links installed in ends of wheel cylinder. Hold shoes in

brake shoes.

position with three return springs.

(3) Refer to paragraph 4-35 and bleed brake

(3) Refer to figure 4-19 and install dust shield

system hydraulic lines.

and secure with four screws and lock washers.

Section X. WHEELS

4-38.

General

steering wheel assemblies consist of the wheel, tire, and

a. The front drive wheels are mounted on

wheel bearings.

spindles attached to the axles. Jackshafts, with pinion

b. Front Wheel Removal.

gears, extend through the brake assemblies and mesh

(1) Raise the front of the truck until the wheel

with the ring or bull gears in the wheels. Rotation of the

clears the floor. Tilt mast to full backward position. Place

pinions cause the ring gears to rotate around the

a wooden block under the mast assembly and tilt mast

spindles, driving the truck.

forward to vertical position. Movement of mast will

b. The rear steering wheels (fig. 4-24) mount

elevate drive wheel clear of the floor.

on spindle attached to the steering axle. Action of the

(2) Refer to figure 4-22 and remove front drive

steering gear and drag link moves the pivot arm

wheel as follows:

assembly. Tie rods, extending to the spindles, are

(a) Remove

three screws (9) and lock

connected to the pivot arm. As the pivot arm moves, the

washers (8) and remove hub cap (7).

tie rods move the spindles, turning the ,.heels in the

(b) Remove cotter pin (1) from wheel nut (6)

direction of travel desired.

and remove wheel nut and washer (5) from axle.

c. Both pairs of wheels are mounted on

tapered roller bearings. The bearings must be greased

and axle.

and adjusted as described in paragraph 4-39.

(d) Remove wheel assembly (3). Remove

wheel carefully to prevent damage to brake shoes or

4-39. Wheels and Tires

drums.

a. General.

The front or drive wheel

(e) Remove inner wheel gearing (2).

assemblies consist of the wheel and brake drum, tire,

wheel bearings, and a ring or bull gear. The rear or

4-22