TM 5-3810-294-34
Table 2-1. Troubleshooting - Continued
Malfunction
Probable Cause
Corrective Action
d. Brushes worn.
d. Replace brushes (chap. 3).
burned out rectifier or rectifiers.
replace alternator or repair
alternator (chap. 3).
a. Faulty alternator.
a. Refer to TM 5-3810-294-20 and
18.
Incorrect alternator voltage.
replace alternator.
b. Faulty voltmeter.
b. Refer to TM 5-3810-294-20 and
replace meter.
a. If lights go out or dim: weak
a. Refer to TM 5-3810-294-10
19.
Starter does not rotate or
rotates slowly.
battery or poor connections.
and/or TM 5-3810-294-10 to
correct battery problem.
b. If lights stay bright: faulty starter
b. Replace starter components as
switch.
necessary (chap. 3).
a. Pinion stuck, pinion teeth broken, a. Repair and/or replace faulty
20.
Starter rotates but does not
engage flywheel.
or faulty solenoid.
item (chap. 3).
b. Ring gear teeth broken.
b. Replace ring gear (chap. 3).
Power steering is "spongy" and a. Low fluid level.
a. Refer to TM 5-3810-294-20 and
21.
makes "groaning" sound.
add fluid.
b. Faulty power steering pump.
b. Refer to TM 5-3810-294-20 and
replace pump.
c. Mechanical linkage binding.
c. Adjust or repair linkage (chap.
16).
Hard steering when vehicle is a. Hydraulic fluid level low.
a. Refer to TM 5-3810-294-10 and
22.
standing: or trouble is in-
fill reservoir to proper level.
b. Pump belt loose or glazed.
b. Refer to TM 5-3810-294-20 and
termittent.
adjust or replace belt.
c. Tires worn, unbalanced wheels,
c. Refer to TM 5-3810-294-10
wrong air pressure, out of
and/or TM 5-3810-294-20 to
alignment.
correct steering problem.
a. Reservoir too full.
a. Refer to TM 5-3810-294-10 and
23. Hard steering when vehicle is
moving.
remove fluid until proper level is
reached.
b. Filter clogged.
b. Refer to TM 5-3810-294-20 and
replace reservoir or clean filter.
a. Improper brake adjustment.
a. Refer to TM 5-3810-294-20 and
24. Brakes "grab" or the vehicle
applied (pulls to one side).
tends to turn when brakes are
adjust brakes.
b. Worn brake linings.
b. Replace brake shoes (chap. 18).
a. Leaks in system.
a. Check for leaks and tighten loose
25. Incorrect air brake system
pressure.
connections.
b. Defective compressor.
b. Refer to TM 5-3810-294-20 and
replace compressor.
c. Governor set at wrong pressure
c. Refer to TM 5-3810-294-20 and
range.
adjust governor.
a. Defective or burned out lamps.
a. Refer to TM 5-3810-294-20 and
26. Lights fail or are dim.
replace lamps.
b. Loose connections or defective
b. Tighten connections and repair
wiring.
and / or replace wiring.
c. Defective switches.
c. Refer to TM 5-3810-294-20 and
replace switches.
d. Faulty ground.
d. Clean ground terminals.
a. Refer to TM 5-3810-294-10 and
slipping.
adjust drum clutches.
b. Engine not delivering full power.
b. Perform procedures listed in step
11.
a. Safety pawl is engaged.
a. Lift boom slightly, disengage
28. Boom will not lower.
safety pawl and lower boom.
b. Boom hoist pawl friction shoes
b. Refer to TM 5-3810-294-20 and
improperly adjusted or linkage
adjust shoes and/or linkage.
improperly adjusted.
a. Boom already in highest position.
a. Lower boom.
29. Boom will not raise.
b. Boom hoist clutch is slipping.
b. Refer to TM 5-3810-294-10 and
adjust boom hoist clutch.
30. Clamshell operates erratically. a. Rear drum brake is lagging.
a. Refer to TM 5-3810-294-10 and
adjust rear drum shaft.
b. Front or rear drum clutches are
b. Refer to TM 5-3810-294-10 and
slipping or grabbing.
adjust drum clutches.
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