TB 9-2320-335-13&P
REFERENCE INFORMATION
HYDRO-BOOSTER
Test for faulty proportioning valve:
Drive the vehicle and have an assistant
observe during the performance of this test.
PROPORTIONING VALVE
With vehicle at curb weight, decelerate vehicle
(S/N 299999 AND BELOW)
from 45 to 40 mph (72 to 69 kph) on dry
concrete road and apply sufficient pressure to
HYDRO-BOOSTER
lock up front brakes. If rear brakes lock up
before front brakes, the proportioning valve
should be replaced.
Replace proportioning valve
(TM 9-2320-387-24-1).
PROPORTIONING VALVE
(S/N 300000 AND ABOVE)
Method for checking hydro-booster:
Depress brake pedal several items to
exhaust accumulator pedal. Depress brake
pedal and start engine. Brake pedal should
fall, then push back against operator's foot.
Replace hydro-booster (TM 9-2320-387-24-1).
NYLON
BRAKE PEDAL
BUSHING
Replace service brake pedal
(TM 9-2320-387-24-1).
The steering tests will check for suspension
problems that will affect braking.
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