TOPIC 1. GENERAL DESCRIPTION - TM-10-3930-644-14-P0020

TM 10-3930-644-14&P

TOPIC 1. GENERAL DESCRIPTION

Allis-Chalmers Lift Trucks are designed to function in a

located in each drive wheel. The parking brake is

variety of heavy-duty industrial applications. Power

mounted on the differential case, and the brake drum is

requirements are met by a gasoline, 4- or 6- cylinder,

mounted on the differential drive pinion flange. The

4-stroke cycle, naturally aspirated engine.

Engine

parking brake handle is located within easy reach of the

cooling is accomplished by a belt-driven centrifugal

operator's left hand.

pump that forces coolant through the head, block and

fin-type radiator. The engines are pressure lubricated to

A power steering control unit located at the lower end of

the rocker arms, main bearings, and connecting rods by

the steering column diverts hydraulic oil, under pressure,

a gear type oil pump driven by the camshaft. The oil is

to the appropriate power steering part. Hydraulic oil

cleaned by a replaceable oil filter. An oil filler cap is

lines connect the steering unit to the power steering

located on a filler tube assembly on the side of the

cylinder to give the lift truck a full power steering system.

cylinder block or on the valve cover. Oil level is easily

The power steering system provides maximum control of

checked by a conveniently located dipstick.

the lift truck with minimum steering effort.

The power shift transmission consists of three major

The lift assembly utilizes special rolled steel channel

components

constant-mesh

transmission,

sections, and/or "I" beams, and cross braces, all welded

hydraulically actuated clutch pack, and a torque

to form a rigid permanent structure. Due to construction

converter. A single-lever shift control on the right side of

features of the inner mast and carriage rollers, sliding

the steering column controls the direction of travel

friction is virtually eliminated.

Two independent lift

through a control valve mounted on the transmission

chains are used for safety; each has sufficient strength

housing.

to safely handle a full load. A special seat at the bottom

of the mast permits self-alignment of the lift cylinder

The drive unit incorporates a double-reduction gear train

within the mast channels, thus reducing off center

using the latest advancements in gear design. All parts

stresses.

of the unit are bearing mounted for the greatest possible

efficiency and quietness. The first reduction is through a

The heavy-duty welded steel fork carriage provides the

heavy-duty spiral bevel ring gear and pinion drive gear.

ultimate in strength and visibility. The forks are identical

Final reduction is obtained through a pinion (Jackshaft)

and interchangeable. Notches spaced along the upper

and Internal tooth gear (bull gear). This method greatly

edge of the carriage act in conjunction with latches on

reduces torque stress on the axle shaft.

the forks to position and secure then to the carriage.

The truck is equipped with hydraulic brakes designed for

Hydraulic Pressure, used to actuate the cylinders or

long life and minimum maintenance. They have a large

accessory equipment, is supplied by a positive-

braking area and give smooth braking and positive

displacement gear pump coupled

control under all operating conditions. Brakes are

Figure 1-1. Lift Truck - Typical

1-1E