ARMY TM 9-6115-642-24
AIR FORCE TO 35C2-3-455-12
MARINE CORPS TM 09247A/09248A-24/2
TABLE 3-1. DIRECT SUPPORT TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
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 9-2815-253-24.
Step 4. Check for foreign material in combustion chamber, refer to TM 9-2815-253-24.
c. If foreign material found, clean combustion chamber, refer to TM 9-2815-253-24.
d. If no foreign is found and trouble persists, replace engine. Refer to TM 9-2815-253-24.
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-803A) or paragraph 4-12 (MEP-813A).
Step 2. Test for defective generator stator windings, refer to paragraph 4-10.7.
a. If generator stator is not defective, do Step 3.
b. If defective, replace generator stator, paragraph 4-11 (MEP-803A) or paragraph 4-12 (MEP-813A).
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 rotating rectifiers, paragraph 4-11 (MEP-803A) or paragraph 4-12 (MEP-813A).
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-803A) or paragraph 4-12 (MEP-813A).
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-803A) or paragraph
4-12 (MEP-813A).
10. GENERATOR SET FAILS TO GENERATE SUFFICIENT VOLTAGE.
Step 1. Check for low engine speed, refer to TM 9-2815-253-24.
a. If engine is operating correctly, do Step 2.
b. If defective, repair engine, refer to TM 9-2815-253-24.
Step 2. Test for shorted generator stator, paragraph 4-10.7.
If generator stator is shorted, replace generator stator, paragraph 4-11 (MEP-803A) or paragraph
4-12 (MEP-813A).
3-6
8. ABNORMAL ENGINE NOISE. - Cont.
