Front Axle Group

TM 55-1740-202-13&P

b. Front Axle Group. The front axle group includes the following parts:

(1) Wheel suspension frame.

(2) Two wheel mount shock-absorbing spring assemblies.

(3) Two tie-rod assemblies.

(4) Towbar.

(5) Safety chain.

c. Rear Axle Group. The rear axle group includes the following parts:

(1) Wheel suspension frame.

(2) Two banjo suspension spring assemblies.

(3) Pintle hook.

d. Brake Group. The brake group, located on the front transporter assembly, consists of the following parts:

(1) Mechanical parking brake lever and linkage (linked to hydraulic brake shoes and lining).

(2) Hydraulic brake actuator assembly (located on towbar).

(3) Wheel cylinders and brake shoes.

e. Wheel Group. The wheel group consists of the following parts:

(1) Tires and tubes.

(2) Wheels.

(3) Hub assemblies (rear) or drum and hub assemblies (front).

(4) Two seals.

(5) Two inner bearings.

(6) Two outer bearings.

f. Wheel Suspension and Braking. The rear wheels are mounted on banjo spring assemblies. Each banjo spring

assembly contains seven springs that absorb road shock at the rear wheels. The front wheels are mounted on wheel

mount shock-absorbing spring assemblies. Each wheel mount shock-absorbing spring assembly contains six springs that

absorb road shock at the front wheels. Each front assembly includes a kingpin as the steering pivot point. The brakes at

the front wheels are actuated by the hand parking brake linkage or by hydraulic pressure. When connected to a tow

vehicle, the hydraulic brake system is controlled by an actuator on the towbar. When the brakes on the tow vehicle are

applied, the trailer pushes against the tow vehicle, causing the actuator to compress and exert a force on the master

cylinder that supplies hydraulic pressure to the front brakes.

g. Steering. The steering center arm assembly is connected to the front axle by the center arm pin. Tie rods

connect the steering arm assembly to the wheel mount shock-absorbing spring assemblies. The maximum turning radius

is limited by safety chains connecting the front wheel suspension frame and towbar. Incorporated in the center arm pivot

is a hydraulic brake hose tee fitting.

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