TM-9-2320-361-20
2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)
TECHNICAL MANUAL; UNIT MAINTENANCE
OCTOBER 1991
TM-9-2320-361-20 - Page 75 of 1207
TM 9-2320-361-20
1-21. COMPRESSED AIR AND BRAKE SYSTEM OPERATION (Contd)
1-62
b. Brake System Operation.
HYDRAULIC BRAKE LINES
- Directs brake fluid under hydraulic pressure to all six wheel
cylinders.
BRAKE PEDAL
- Operator control for slowing or stopping vehicle. Applies force through brake
linkage to master cylinder to actuate vehicle brakes.
BRAKE LINKAGE
- Transmits brake pedal force to master cylinder.
HAND CONTROL VALVE
(M275A2 only) - Controls semi-trailer brake system. Allows brakes to
be applied and released manually.
MASTER CYLINDER
- Stores brake fluid and is the filling location for addition of brake fluid.
Converts force from brake linkage into hydraulic pressure.
AIR-HYDRAULIC UNIT
- Combines hydraulic pressure from master cylinder and air pressure
from compressed air system to supply increased hydraulic pressure to the vehicle brakes.
WHEEL CYLINDER
- Converts hydraulic pressure into mechanical force to press brakeshoes
against surface of brakedrum.
BRAKEDRUM
- Encloses wheel cylinder and brakeshoes, and provides surface for brakeshoes to
press against.
BRAKESHOE
- Applies friction to brakedrum to slow or stop rotation of wheels.
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