TM 9-2320-289-34
Table 2-1. Mechanical Troubleshooting (Con’t)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
14. PEDAL RETURNS SLOWLY
Step 1,
Repair power booster. (See paragraph 7-3)
15. PEDAL PULSATES
WARNING
DO NOT use a dry brush or compressed air to clean brake shoes, brake
pads, or brake components. There may be asbestos dust on brake shoes,
brake pads, or brake components which can be dangerous to you if you
breathe it. Brake shoes, brake pads, and brake components must be wet,
and a soft brush must be used. Failure to follow this warning may result in
serious illness or death to personnel,
Step 1.
Remove calipers. (See TM 9-2320-289-20) Install dial indicator so that plunger
contacts rotor about 1 in. (25 mm) from outside edge of rotor. Turn rotor one
complete rotation, Variation in dial indicator readings (lateral runout) should not be
more than 0.004 in, (0, 102 mm). Repeat for other rotor,
If lateral runout is excessive, adjust wheel bearings (See TM 9-2320-289-20)
and retest.
If lateral runout is still excessive, machine rotor. (See
paragraph 7-2)
Step 2.
Remove drums. (See TM 9-2320-289-20) Measure inside diameter of drums at
open and closed edges and at right angles to each other, Do this at 8
evenly-spaced points.
If there is a difference between measurements (out-of-round), machine
drums to specifications. (See paragraph 7-2)
Step 3.
Inspect rotors and drums for heat spotting or scoring.
Machine to specifications if heat spotted or scored. (See paragraph 7-2)
Step 4.
Adjust wheel bearings. (See TM 9-2320-289-20)
Step 5.
Check tires for improper balancing. (See TM 9-261 0-200-24)
Step 6.
Check components of suspension system for looseness or damage.
Tighten any loose components. Replace any damaged components.
2-15
