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Symptom Cause Remedy
Overheating Clogged ventilating screens and air
passages
Clean all screens and air passages.
Dry or defective bearings Replace defective bearings.
Coupling misaligned Align the generator set.
Generator fi eld coils shorted or
grounded
Test fi eld coils for shorts. Replace
shorted rotor or return it to the factory for
repair.
Unbalanced load or overload, low PF Adjust load to nameplate rating.
Vibrations Defective or dry bearings Replace defective bearings.
Misalignment of generator and prime
mover
Align the generator set.
Generator not properly mounted Check mounting. Correct defective
mounting.
Transfer of vibration from another
source
Isolate the generator set from the source of
vibration by installing vibration dampeners
between generator set base and foundation.
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