Section XIII. AXLE ASSEMBLIES

TM 10-3930-631-12

(2) Install seat cushion (6) and secure with

(2) Refer to paragraph 4-31 and connect

screws (5).

seat brake linkage to brake link.

(3) Install back cushion (4) on frame and

(3) Install seat assembly (12) on plate and

secure with screws (1), washer (2) and nuts (3).

secure with lock nuts (1) and washers (2).

d. Installation.

(4) Refer to paragraph 4-31 and adjust seat

brake linkage if necessary.

(1) Install plate (4, fig. 4-33) on frame and

(5) Refer to paragraph 4-24 and install and

install shaft (10) through plate and brake link (11).

connect taillight on rear of seat.

Secure shaft with retaining rings (9).

Section XIII. AXLE ASSEMBLIES

Oil should be to level of plug hole. Add lubricant as

4-47. General

required. Install plug.

a. The front or driving axle is connected to the

d. The drain plug is located at the bottom of the

drive motor shaft. The shaft drives the differential in the

differential housing. Remove level plug. Place a suitable

center of the axle. Torque is transmitted to the axles or

container beneath axle, remove plug, and drain lubricant.

jackshafts. The pinion on the axle is meshed with a ring

Install plug and tighten securely. Fill differential through

or bull gear in the wheel assembly. Rotation of the axles

level plug opening to level of hole. Install level plug.

rotates the wheels providing motive power from the

e. Lubrication of axle pinion and ring or bull gear is

truck.

accomplished by removing the front wheel. Refer to

b. The rear or steering axle is mounted on

paragraph 4-37 and remove the front wheels. Clean the

brackets at the front and rear. The spindles pivot on king

pinion and ring or bull gears with solvent and dry

pins and are actuated by the tie rods extending from a

thoroughly with compressed air. Lubricate gears with

pivot arm mounted at the center of the axle. A power

grease (GAA). Fill gear spaces to three-fourths height of

steering unit, controlled by the steering wheel, rotates the

teeth with grease. Install front wheels. Check ring or bull

pivot arm, through the steering cylinder drag link, in the

gear mounting screws for tighteness.

Tighten if

direction required to turn the wheels.

necessary.

4-48. Front Axle

4-49. Rear Axle

a. Service points on the front axle include the

a. The rear, or steering axle, requires very little

breather and drain and level plugs.

service. Lubricate according to the lubrication order.

b. The breather is located on the right top of the

b. Check tie rods, axle, steering cylinder and drag

differential housing. Remove breather and clean with

link for damage.

cleaning compound, solvent (Fed. Spec. P-D-680) and

c. Check steering action and adjust if necessary

dry thoroughly. Install breather and tighten securely.

(para 4-40).

c. The level plug is located at the right front of the

axle housing. Remove plug and check level of lubricant.

Section XIV. HYDRAULIC LIFT COMPONENTS

tilt the mast and side shift the carriage.

4-50. General

b. The main components of the hydraulic lift

a. Power to raise, lower and tilt the mast and

system as illustrated on figure 4-35 are the hydraulic oil

carriage is supplied by the hydraulic system (fig. 4-35).

reservoir, motor-driven dual hydraulic pump, control

The carriage can be shifted from side to side

valve, filter, lift, tilt and side shift cylinders and hoses and

hydraulically. Included in the system is a power steering

tubes.

pump and motor, valve and cylinder to steer the lift truck.

c. Power steering components consist of the

Hydraulic oil is stored in the reservoir and pumped by the

motor-driven single pump, steering unit valve and

hydraulic pumps to the control valve and steering unit.

steering cylinder. Oil for the steering system is also

Manipulation of the control valve levers opens and closes

supplied by the hydraulic reservoir.

ports to various cylinders providing the motion to lift and

4-42