ARMY TM 9-6115-645-24
AIR FORCE TO 35C2-3-444-12
MARINE CORPS TM 09244A/09245A-24/2
TABLE 3-1. DIRECT SUPPORT TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
13. GENERATOR SET OUTPUT FLUCTUATES.
Step 1. Check for irregular engine speed, refer to TM 9-2815-256-24.
a. If engine is operating correctly, do Step 2.
b. If engine is not operating correctly, repair in accordance with TM 9-2815-256-24.
Step 2. Check for loose terminations or load connections.
a. If terminations are tight, do Step 3.
b. If loose, tighten terminations.
Step 3. Test for defective AC voltage regulator.
a. If voltage regulator is not defective, do Step 4.
b. If defective replace AC voltage regulator, paragraph 4-1.
Step 4. Test for intermediate short in generator exciter field, paragraph 4-20.1.
If shorted, replace exciter stator, paragraph 4-20.
14. GENERATOR OVERHEATS.
Step 1. Check for clogged air intake screens.
a. If air intake screens are not clogged, do Step 2.
b. If clogged, clean air intake screens.
Step 2. Check for defective fan, paragraph 4-22.
a. If fan is not defective, do Step 3.
b. If defective, replace fan, paragraph 4-22.3.
Step 3. Check for dry generator main bearing, paragraph 4-18.
If dry, replace main bearing, paragraph 4-18.
15. GENERATOR NOISY WHEN RUNNING.
Step 1. Check for defective generator main bearing, paragraph 4-18.
a. If generator main bearing is not defective, do Step 2.
b. If defective, replace main bearing, paragraph 4-18.
Step 2. Check for loose engine/generator coupling, paragraph 3-7.2, step
a. If engine/generator coupling is not loose, do Step 3.
b. If loose, tighten engine/generator coupling bolts, paragraph 3-7.2.
Step 3. Test for defective generator.
If defective, replace generator, paragraph 4-16.
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