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
11. GENERATOR SET OUTPUT FLUCTUATES.
Step 1. Check for irregular engine speed, refer to TM 9-2815-253-24.
a. If engine is operating properly, do Step 2.
b. If defective, repair engine, refer to TM 9-2815-253-24.
Step 2. Check for short in generator exciter stator, refer to paragraph 4-10.4.
If exciter stator is shorted, replace exciter stator, paragraph 4-11 (MEP-803A) or paragraph 4-12
(MEP-813A).
12. GENERATOR NOISY WHEN RUNNING.
Step 1. Check for defective generator main bearing, refer to paragraph 4-11 (MEP-803A) or paragraph 4-12
(MEP-813A).
a. If generator main bearing is not defective, do Step 2.
b. If defective, replace main bearing, paragraph 4-11 (MEP-803A) or paragraph 4-12 (MEP-813A).
Step 2. Check for heat causing loose laminations.
a. If generator laminations are not loose, do Step 3.
b. If defective, replace part(s), paragraph 4-11 (MEP-803A) or paragraph 4-12 (MEP-813A).
Step 3. Inspect for loose engine/generator coupling.
a. If there are no loose or missing engine/generator coupling bolts, do Step 4.
b. If loose, tighten or install engine/generator coupling bolts, paragraph 4-11.4 (MEP-803A) or para-
graph 4-12.6 (MEP-813A).
Step 4. Check for defective generator.
If defective, replace generator, paragraph 4-11 (MEP-803A) or paragraph 4-12 (MEP-813A).
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