ARMY TM 9-6115-641-24
AIR FORCE TO 35C2-3-456-12
Table 3-1. DIRECT SUPPORT TROUBLESHOOTING - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
8. ABNORMAL ENGINE NOISE
Step 1. Check for worn rocker arm shaft, refer to TM 9-2815-252-24.
a. If rocker arm shaft is not worn, do Step 2.
b. If worn, replace rocker arm shaft, refer to TM 9-2815-252-24.
Step 2. Check for bent push rods.
a. If push rods are not bent, do Step 3.
b. If bent, replace push rods, refer to TM 9-2815-252-24.
Step 3. Check for worn timing gears.
a. If timing gears are not worn, do Step 4.
b. If worn, replace timing gears, refer to TM 9-2815-252-24.
Step 4. Check for foreign material in combustion chamber, refer to TM 9-2815-252-24.
a. If foreign material found, clean combustion chamber, refer to TM 9-2815-252-24.
b. If no foreign material is found replace engine, refer to TM 9-2815-252-24.
9. GENERATOR SET FAILS TO GENERATE POWER.
Step 1. Test for open circuit in generator exciter field, refer to paragraph 4-10-4.
a. If exciter stator, is not open, do Step 2.
b. If open, replace exciter stator, paragraph 4-11 (MEP-802A) or paragraph 4-12 (MEP-812A).
Step 2. Test for defective generator stator windings, refer to paragraph 4-10-7.
a. If generator stator is not defective, so Step 3.
b. If defective, replace generator stator, paragraph 4-11 (MEP-802A) or paragraph 4-12 (MEP-812A).
Step 3. Test for defective generator rotating rectifiers, refer to paragraph 4-10-3.
a. If rectifiers are not defective, do Step 4.
b. If defective, replace generator rotating rectifiers, paragraph 4-11 (MEP-802A) or paragraph 4-12
(MEP-812A).
Step 4. Check for open circuit in generator rotor, refer to paragraph 4-10-6.
a. If generator rotor is not open, do Step 5.
b. If open, replace generator rotor, paragraph 4-11 (MEP-802A) or paragraph 4-12 (MEP-812A).
Step 5. Check for shorted generator exciter armature, refer to paragraph 4-10-5.
If generator exciter rotor is shorted, replace exciter rotor, paragraph 4-11 (MEP-802A) or paragraph
4-12 (MEP-812A).
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