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TM 9-2320-312-24-1
TROUBLESHOOTING PROCEDURES - CONTINUED
0006 00
Table 9. Service Brake System Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
If lines, hoses or fittings are
2. Front/Rear Brakes Release Slowly or Will Not
1. Inspect service brake lines,
Release.
hoses,  and  fittings  for
damaged, replace (WP 0066 00).
obstructions or crimping.
a. If slack adjusters, S-cams,
2. Inspect slack adjusters, S-
chambers or shafts are
cams, brake chambers, and
damaged, replace (Group
shafts for damage and proper
080  or  Group  090
adjustment.
Commercial
Service
Manuals).
b. Adjust brakes (Group 080
or Group 090 Commercial
Service Manuals).
Replace  worn  or  damaged
3. Remove  brakedrums  and
inspect brakeshoes and brake
components (Group 080 or
components for excessive
Group 090 Commercial Service
wear and/or damage.
Manuals).
Replace any leaking or damaged
3. Poor or Insufficient Braking Force to Stop
1. Inspect  for  leaking  or
Vehicle.
damaged  airbrake  system
airbrake system component.
valves, lines, hoses, and
fittings.
Replace leaking or damaged
2. Inspect front and rear airbrake
chambers  for  leaks  and
airbrake chambers (WP 0031
damage.
Clean brakedrums and replace
3. Remove  brakedrum  dust
shields
and
inspect
contaminated
brakeshoes
brakeshoes and drums for
(Group 080 or Group 090
grease, oil or contamination.
Commercial Service Manuals).
Replace all parts excessively
4. Remove  brakedrums  and
inspect all brake components
worn or damaged (Group 080 or
for excessive wear and/or
Group 090 Commercial Service
damaged parts.
Manuals).
If slack adjusters, S-cams or
4. Rear Brakes Locked or Overheated.
1. Inspect slack adjusters, S-
cam, and shafts for damage
shafts are damaged, replace
and proper adjustment.
(Group 090 Commercial Service
Manuals).
Replace  worn  or  damaged
2. Remove rear brakedrums and
inspect brakeshoes and brake
components
(Group
090
components for excessive
Commercial Service Manuals).
wear and/or damage.
Replace leaking or damaged
3. Inspect
rear
airbrake
chambers and air hoses for air
airbrake chambers or air hoses
leaks and damage.

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