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
10. GENERATOR SET FAILS TO GENERATE SUFFICIENT VOLTAGE.
Step 1. Check for low engine speed, refer to TM 9-2815-252-24.
a. If engine is operating correctly, do Step 2.
b. If defective, repair engine, refer to TM 9-2815-252-24.
Step 2. Test for shorted generator stator, paragraph 4-10-7.
If generator stator is shorted, replace generator stator, paragraph 4-11 (MEP-802A) or paragraph
4-12 (MEP-812A).
11. GENERATOR SET OUTPUT FLUCTUATES.
Step 1. Check for irregular engine speed, refer to TM 9-2815-252-24.
a. If engine is operating properly, do Step 2.
b. If defective, repair engine, refer to TM 9-2815-252-24.
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-802A) or paragraph 4-12
(MEP-812A).
12. GENERATOR NOISY WHEN RUNNING.
Step 1. Check for defective generator main bearing, refer to paragraph 4-11 (MEP-802A) or 4-12 (MEP-812A).
a. If generator main bearing is not defective, do Step 2.
b. If defective, replace main bearing, paragraph 4-11 (MEP-802A) or paragraph 4-12 (MEP-812A).
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-802A) or paragraph 4-12 (MEP-812A).
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 Ioose, tighten or install engine/generator coupling bolts, paragraph 4-11-4 (MEP-802A) or
paragraph 4-12-6 (MEP-812A).
Step 4. Check for defective generator.
If defective, replace generator, paragraph 4-11 (MEP-802A) or paragraph 4-12 (MEP-812A).
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