TM-9-2320-387-10
TRUCK, UTILITY: S250 SHELTER CARRIER, 4X4, M1113
OPERATOR’S MANUAL
OCTOBER 2001
CHANGE 1
TM-9-2320-387-10 - Page 39 of 277
TM
9-2320-387-10
l-23.
SERVICE BRAKE SYSTEM OPERATION
The service
brake system is an inboard-mounted, four-wheel, disc brake,
hydraulically-assisted system. Major components of the braking system are:
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A
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B
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C
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D
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E
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F
0
G
HYDRO-BOOSTER
- Converts hydraulic power from the steering pump to
mechanical power to the master cylinder, providing power assist during
braking.
MASTER CYLINDER/RESERVOIR
- Stores brake fluid, and converts
mechanical pedal pressure to hydraulic pressure.
PROPORTIONING
VALVE - Provides balanced front-to-rear braking and
activates brake warning lamp in case of brake system malfunction.
ACCUMULATOR
- Stores hydraulic pressure for additional power-assisted
braking in case of loss of pressure in steering system.
BRAKE PEDAL - Provides operator control for stopping vehicle.
BRAKE LINKAGE - Directs brake pedal pressure to hydra-booster.
BRAKE PRESSURE
prevent brake lockup.
LIMITER - Limits front brake line pressure to
1-25
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