UNDERCARRIAGE TMS700E SERVICE MANUAL
8-24 Published 01-29-2015, Control # 512-01
Maintenance
Table 8-2
Troubleshooting
Brakes
Disassembly
1. Set the parking brakes and block the wheels.
2. Raise the carrier so that the front wheels are off the
ground.
3. Install jack stands under the carrier.
4. Back off the automatic slack adjuster until the brake
shoes are clear of the drum.
5. Remove the hub cap, axle spindle nut, and washer.
6. Rock the drum and pull outward until the outer wheel
bearing can be removed.
7. To remove the drum, pull outboard while rocking from
side to side.
Symptom Probable Cause Solution
1. Brakes are poor or do not apply. a. Insufficient air pressure. a. Check for the correct pressure
at the compressor and brake
air chambers.
b. Restriction or leak in lines,
valves, etc.
b. Check all lines, valves, etc.,
for leaks or restrictions.
c. Brakes out of adjustment. c. Adjust the brakes.
d. Leaking diaphragm. d. Replace the diaphragm.
2. Uneven braking or uneven lining
wear.
a. Ruptured diaphragm. a. Replace the Diaphragm.
b. Brakes out of adjustment. b. Adjust the brakes.
c. Grease on the lining. c. Replace the lining.
d. Glazed lining. d. Replace the lining.
e. Shoes installed backwards. e. Reverse the shoes.
f. Combination linings. f. Remove the linings and
replace with the correct style.
DANGER
Do not work under a crane supported by only outrigger
jacks. Use jack stands to support the carrier.
DANGER
Do not strike the axle shaft flange with a hammer. Do not
use chisels or wedges to loosen shaft or dowels.
CAUTION
Do not force the drum. Excessive force may damage
brake components.
Reference Only
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