UNDERCARRIAGE TMS700E SERVICE MANUAL
8-38 Published 01-29-2015, Control # 512-01
Maintenance
Table 8-3
Troubleshooting
Symptom Probable Cause Solution
1. Brakes are poor or do not apply. a. Insufficient air pressure. a. Check for correct pressure at
compressor and brake
chambers.
b. Restriction or leak in lines,
valves, etc.
b. Check all lines, valves, etc.,
for leaks or restrictions.
c. Brakes are out of adjustment. c. Adjust the brakes.
d. Leaking diaphragm. d. Replace diaphragm.
2. Uneven braking or lining wear. a. Ruptured diaphragm. a. Replace diaphragm.
b. Brakes are out of adjustment. b. Adjust brakes.
c. Grease on the lining. c. Replace lining.
d. Glazed lining. d. Replace lining.
e. Shoes are installed
backwards.
e. Reverse shoes.
f. Combination linings. f. Replace with correct style.
3. Automatic adjusters are not
working.
a. Adjusting pawl installed
backwards.
a. Remove and properly install
pawl.
b. Pawl is collapsed or missing. b. Replace spring.
c. Bolt is frozen in adjusting
sleeve.
c. Free-up or replace the bolt.
d. Detent is damaged allowing
the bolt to rotate with sleeve.
d. Replace damaged detent.
e. Double lip seals are not
installed correctly.
e. Remove and correctly install
seals.
4. Spring brake is not holding. a. Power spring is not fully
released. (uncaged).
a. Turn caging bolt fully
counterclockwise until stop is
reached.
b. Brakes are out of adjustment. b. Readjust the brakes.
c. Hold-off air is not releasing
fully.
c. Check for faulty air system
components.
d. Power spring is broken. d. Replace spring brake
actuator.
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