4–5
T-375
4.3 Alternating Current (AC) Generator
Table 4–8 Alternating Current Generator
Condition
Possible Cause
Remedy / Reference Section
No voltage
Loss of rotor magnetism
Replace
Circuit breaker tripped
Check CB1
Open in stator windings
Replace
Short circuited
Replace
Contactor not engaged
Replace
Low voltage
Low engine speed
High resistance connections, connections
are warm or hot
Tighten
Loss of rotor magnetism
Replace
Fluctuating voltage (May be
indicated by flickering lights)
Fluctuating speed
Irregular speed of engine
Engine Manual
Loose terminal or load connections
Tighten
Bad bearing causing uneven air gap
Replace
High voltage
Excessive engine speed
Overheating
Generator overloaded
Check
Clogged vents/baffles
Check / Clean
High temperature surrounding generator
Insufficient air circulation or recirculation
Check / Clean
Unbalanced load
Balance
Dry bearing
Replace
Mechanical Noise
Bad bearing
Replace
Rotor rubbing on stator
Replace
Loose laminations
Replace
Generator frame produces
shock when touched
Static charge
Check ground to frame
Grounded armature of field coil
Replace
Summary of Contents for 69UG15
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Page 60: ...T 375 6 2 Figure 6 2 Schematic for 12 VDC Control Circuit 12 VDC Control Circuit ...
Page 61: ...6 3 T 375 Figure 6 3 Schematic High Voltage Circuitry High Voltage Circuitry Receptacle Box ...
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