TM-9-2320-387-24-1
TRUCK, UTILITY: S250 SHELTER CARRIER, 4X4, M1113
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE, VOLUME 1
DECEMBER 1997
CHANGE 1
TM-9-2320-387-24-1 - Page 477 of 1205
TM 9-2320-387-24-l
BRAKE SYSTEM
PARKING
BRAKE
MASTER CYLINDER
NO VISIBLE
POSSIBLE
PROBLEMS
PADS
CALIPERS
PROPORTIONING
VALVE
MECHANICAL
COMPONENTS
INFO
PARKING
OK
MASTER
OK
BRAKE
OK
POSSIBLE
ROTORS
CALIPERS
VALVE
HYDRO-BOOSTER
COMPONENTS
KNOWN
PARKING BRAKE
MASTER CYLINDER
BRAKE PADS
POSSIBLE
PROBLEMS
BINDING
CALIPERS
PROPORTIONING
VALVE
MECHANICAL
COMPONENTS
DIAGNOSTIC FLOWCHART
zi+J
TEST OPTIONS
ARE THE BRAKE PADS FREE
VISUAL
FROM CONTAMINATION,
DIRT,
DISTORTION, AND EXCESSIVE
WEAR?
REPLACE
PADS
IN
REASON
FOR QUESTtON
Dirty, bent, or thin brake pads
could cause problems
such as
noisy brakes, erratic braking, or
excessive
pedal pressure.
85
1
i
TE!
ARE THE FOUR SERVICE BRAKE
ROTORS FREE FROM HEAVY
SCORING, EXCESSIVE WEAR,
WARPING, HEAT-SPOTTING,
GLAZING, AND CHIPPING?
OPTIONS
VISUAL
REASON
FOR QUESTION
Damaged rotors reduce
braking ability and speed up
brake failure due to
excessive
heat buildup.
(YES>
TEST OPTIONS
DO THE FOUR SERVICE BRAKE
TRY TO ROTATE ROTORS WHILE
WHEELS ARE RAISED.
ROTORS ROTATE FREELY?
REASON
FOR QUESTION
Sticky rotors can cause
erratic braking behavior.
2-426
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