STEERING AND BRAKE SYSTEM - TM-10-3930-673-20-10034

TM 10-3930-673-20-1

1-20. STEERING AND BRAKE SYSTEM

PARKING BRAKE VALVE

STEERING CONTROL VALVE

PARKING

BRAKE

STEER

BRAKE

FRONT STEERING CYLINDER

REAR STEERING CYLINDER

SELECT

CONTROL

AND SERVICE BRAKE

VALVE

TR00011

Item

Description

Steering Cylinders

A steering cylinder is mounted at both ends of each axle and controlled by the steering

wheel.

Steering Control Valve

Connected directly to the steering wheel and located behind the instrument access panel.

Controls the steering function by directing the flow of hydraulic fluid to the cylinders.

Steer Select Valve

Mounted in the frame. Allows the selection of two wheel, four wheel, or crab steering

through the steer select control, a three position switch.

Brake Control Valve

Located under the cab. Provides a priority flow to the brake system. Excess flow is

directed by the priority valve to the frame tilt system.

Service Brakes

Dry disc, caliper type brakes are mounted on all four wheels. Brakes are hydraulically

actuated by pressing the brake or transmission disconnect pedals. An accumulator in the

braking system enables a limited number of stops without engine power.

Parking Brake

A spring applied and hydraulically released dry disc brake mounted on the input shaft at

the front axle. A switch in the cab engages and disengages the parking brake.

Parking Brake Valve

Mounted on frame cross piece. Controls application/release of hydraulic fluid pressure

to the parking brake.