Onan MEP-003A - CHAPTER 9 GENERATOR SET TEST AND INSPECTION AFTER REPAIR OR OVERHAUL; Section I. GENERAL REQUIREMENTS

TM
5-6115-585-34
NAVFAC
P
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8-623-34
TO
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35C2-3-455-2
TM
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05684C
/
05685B
- 34
Table 2-3 . Troubleshooting ( Cont )
MALFUNCTION
TEST
OR
INSPECTION
CORRECTIVE
ACTION
18. HIGH GENERATOR OUTPUT VOLTAGE ( NO LOAD ).
Step 1. Check for voltage regulator failure . Remove voltage regulator lead if voltage goes even
higher , the voltage regulator is good ( paragraph 6-6 ) .
Repair defective regulator .
Step 2. Check voltage adjust rheostat ( R1 ).
Replace
rheostat
(
R1
)
if
necessary
.
19. FREQUENCY METER ( M3 ) FAILS TO REGISTER .
Step 1. Check transformers T1 and T2 ( paragraph 6-4 ) .
Replace bad transformers .
Step 2. Check frequency meter and transducer ( paragraph 6-4 ) .
Replace bad meter or transducer .
20.
BATTERIES DO
NOT
CHARGE
.
Step 1. Check battery charging alternator stator ( paragraph 8-2 ) .
Replace
bad
stator
.
Step 2. Check battery charging alternator rotor ( paragraph 8-2 ) .
Replace
bad
rotor
.
Step 3. Check regulator - rectifier assembly .
Replace
bad
regulator
- rectifier
.
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2-11