TM-5-3805-254-34
TRUCK, DUMP, 20 TON, 6X4, ON-OFF HIGHWAY 71,000 GVW
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
MARCH 1993
TM-5-3805-254-34 - Page 24 of 727
TM 5-3805-254-34
Table 2-1.
Troubleshooting (Con’t).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6.
EXCESSIVE ENGINE NOISE.
Inspect for internal engine wear and damage to main bearings, connecting rods, camshafts, and journals (see
TM 5-2815-241-34&P).
Replace engine (see paragraph 3-1).
7.
EXCESSIVE ENGINE VIBRATION.
Step 1.
Inspect for faulty vibration damper (see TM 5-2815-241-34&P).
Replace vibration damper (see TM 5-2815-241-34&P).
Step 2.
Inspect for loose and damaged engine mounts (see paragraph 3-3).
Tighten or replace engine mounts (see paragraph 3-3).
Step 3.
Inspect for loose flywheel (see paragraph 6-10).
Tighten flywheel (see paragraph 6-10).
ENGINE COMPRESSION BRAKE
8.
ENGINE COMPRESSION BRAKE ENGAGED WITH SWITCH IN "OFF" POSITION.
Step 1.
Inspect for solenoid valve plunger stuck in ON position (see TM 5-2815-241-34&P).
Replace solenoid valve (see TM 5-2815-241-34&P).
Step 2.
Inspect for faulty solenoid valve seals (see TM 5-2815-241-34&P).
Replace solenoid valve seals (see TM 5-2815-241-34&P).
Step 3.
Inspect for broken control valve spring (see TM 5-2815-241-34&P).
Replace control valve spring (see TM 5-2815-241-34&P).
Step 4.
Inspect for control valve stuck in ON position (see TM 5-2815-241-34&P).
Free or replace control valve (see TM 5-2815-241-34&P).
9.
ENGINE COMPRESSION BRAKE WEAK OR SLOW TO ACTIVATE.
Step 1.
Inspect for sticking slave piston (see TM 5-2815-241-34&P).
Free or replace slave piston (see TM 5-2815-241-34&P).
Step 2.
Inspect for broken control valve spring (see TM 5-2815-241-34&P).
Replace control valve spring (see TM 5-2815-241-34&P).
2-5
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