TM 10-3930-641-34-1
ENGINE TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
23. ALTERNATOR DISCHARGE RATE IS TOO HIGH (CONT)
Step 2. Inspect alternator regulator.
a.
Adjust regulator to lower charging rate. (See page TM 10-3930-641-20.)
b.
Replace regulator. (See page 3-176.)
24. ALTERNATOR IS NOISY
Step 1. Inspect drive belt.
Replace drive belt. (See page TM 10-3930-641-20.)
Step 2. Inspect alternator drive pulley.
a.
Check torque of retaining nut.
Tighten according to specification. (See Appendix D.)
b.
Check keyway.
Replace pulley if keyway is worn and loose. (See TM 10-3930-641-20.)
Step 3. Check alinement of pulley and drive belt.
Aline drive belt and pulley. (See TM 10-3930-641-20.)
Step 4. Check for shorts in rectifier diodes.
Replace diodes as necessary. (See TM 10-3930-641-20.)
Step 5. Check alternator bearings.
Replace bearings. (See page 3-176.)
Step 6. Check runout of rotor shaft.
Replace rotor. (See page 3-176.)
25. ENGINE HAS HIGH EXHAUST TEMPERATURE (HOT, THICK EXHAUST SMOKE)
Step 1. Check exhaust system for restrictions.
Remove restrictions.
Step 2. Check air inlet, after turbocharger, for leaks.
Repair leaks.
Step 3. Check air inlet for restrictions.
Remove restrictions.
Replace filter elements. (See TM 10-3930-641-20.)
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