SECTION II DESCRIPTION AND LEADING PARTICULARS

TM 55-1740-200-14

SECTION II DESCRIPTION AND LEADING PARTICULARS

provides a direct line of vision from the operator to the

19. GENERAL DESCRIPTION.

rear pintle hook. The deck has a non-skid coating and

provides space for a crew and their tool boxes.

110. The tractor is a four-wheel-drive towing tractor

118. SIDE DECK SEATS. The side deck seats also

output is transferred through the hydraulic transmission,

serve as rear wheel fenders. A guard rail, on the side and

mechanical transmission, and transfer case to the front

rear of these seats, is provided for personnel safety and

and rear axles to provide four-wheel-drive at all times.

serves as a back rest.

The hydraulic steering system consists of front and rear

steering systems controlled independently to provide

two-wheel or four-wheel steering control. The hydraulic

119. RUNNING BOARDS. The running boards consist

of a wide step on each side and supporting panels on the

brake system provides braking on all four wheels. The

rear of the steps. The steps are made of heavy gage,

electrical system powers all electrical components. All

self-cleaning, non-skid steel. The supporting panels provide

systems and components are operated by controls located

a rigid installation and serve as a protection for chassis

within the cab.

components.

111. COMPONENT DESCRIPTION.

120. FENDERS. The front wheel fenders are made of

112. CAB INSTALLATION.

heavy gage steel to support personnel. A non-skid coating

is provided for personnel safety.

113. The cab (2, figure 1-2) is constructed in two

121. STEERING SYSTEM.

halves, which enables the using activity to remove the

upper half cab and the doors during hot weather

122. The tractor is equipped with two types of steering

operation, Both upper and lower half cabs are insulated.

systems (4, figure 1-2) which provide allwheel steering to

The cab is a two-man type with two doors. The door

allow maximum maneuverability in towing operations.

windows are roll-down type, the upper half cab rear

(See figure 1-3.)

window is a sliding type and the windshield is a two-piece

123. FRONT WHEEL STEERING SYSTEM. The front

stationary type. A plexiglass window is located in the

upper front corner above the operator to enable the

wheel steering system utilizes a conventional steering

operator to see above the normal line of vision. The lower

wheel and column, steering gears, hydraulic assist valve,

half cab is constructed of medium gage steel side panels

cylinder, and connecting linkage. This system is a

and heavy gage steel floor plates. The cab floor plates are

hydraulic, power-assist type with a manual override.

flush with the door opening and are treated with a

124. REAR WHEEL STEERING SYSTEM. The rear

non-skid coating. An adjustable, contour seat is provided

wheels are steered by a hydraulic control lever located

for the driver; a non-adjustable contour seat is provided

forward and to the left of the operator. This lever

for a passenger.

actuates the rear-steer valve and cam assembly and allows

the operator to select rear-wheel steering only,

114. ENGINE COMPARTMENT HOOD.

coordinated all-wheel steering, or oblique steering. When

the lever is released, the rear wheels automatically return

115. The hood for the engine compartment (1) is

to the straight-ahead position.

constructed of heavy gage steel. It is provided with a

non-skid coating for safety purposes. Quick release

125 . ELECTRICAL SYSTEM.

catches are provided on both sides for easy access. Both

side panels are louvered to provide engine ventilation.

126. The tractor electrical system (5, figure 1-2) is a

twelve-volt system. All tractors use a single battery. An

116. DECK, FENDER AND RUNNING BOARD

engine mounted, belt driven generator charges the battery

INSTALLATION.

and has a charge rate, at engine idle speed, adequate to

keep the battery charged when all electrical components

117. REAR DECK. The rear deck (3) is made of heavy

are in operation. The electrical system on all tractors is

gage steel plate for adequate support. A cutout at the rear

radio suppressed in accordance with Military Specification

of the deck serves as an access step to the rear deck and

MIL-S-10379. (See figure 1-4 for tractor wiring diagram.)

1-4