Troubleshooting; Generator - Kubota GL6000A-AU-B Workshop Manual

GL6000A-AU-B, GL6000D-AU-B,GL9000A-AU-B, GL9000D-AU-B, WSM

1. TROUBLESHOOTING

[1] GENERATOR

Evident Physical Defect (Overheating, Noise, Vibrations, ...)
Trouble
Excessive
Overheating of
Bearing (Temperature
of Bearing Over 80 °C
(176 °F)) (With or
Without Abnormal
Bearing Noise)
Excessive
Overheating of
Generator Frame
(Temperature 30 °C
(86 °F) Above
Ambient)
Excessive Vibration
and Humming Noise
Coming from the
Generator
Generator Damaged
by a Significant
Impact Which Is
Followed by
Humming and
Vibration
Smoke, Sparks of
Flames Issuing from
The Generator
Possible Cause
Bearing race badly locked
Bracket misalignment
Air flow (inlet-outlet) partially clogged or
hot air is being recycled either from
generator or prime mover
Generator overloaded
Fan belt slips
Short-circuit in the generator stator
Loosen bolt of generator mounting
Short-circuit in external circuit
Break or deterioration in the coupling
Break or twist in shaft extension
Shifting or short-circuit of the main field
winding
Bursting or unlocking of the fan
Diode burnt, regulator, rectifier bridge
damaged
Short-circuit in external circuit
(including wiring between generator
and control panel)
Object fallen into the machine
Short-circuit or flash in stator winding
Confirmation
Check the condition of
bearing and grease
Check the bracket
alignment
Check the ventilation
entrance check the
engine's fan and radiator
Check the voltage and
current in the circuit
Fan belt tension
Stop the gen-set and
check the short-circuit,
installation and others
Stop the gen-set
immediately and check
the related circuit and
parts
Stop the gen-set
immediately and check
the related circuit and
parts
2-S1
GENERATOR
Countermeasure
Replace
Repair
Check and clean
Replace
Adjust
Repair or replace
Repair or replace
Repair or replace
KiSC issued 06, 2016 A