Terex T25I and T45I Super Quiet Generator 23
Operating Instructions and Parts Manual
June 2006
REV A
FAULT POSSIBLE CAUSE SOLUTION
High generator Defective automatic Replace voltage
output voltage voltage regulator regulator
Loose wire on voltage Check wiring
adjustment potentiometer
Fluctuating generator An “ON/OFF” type Redistribute load if
output voltage load may be the cause possible
Fluctuating or surging Check engine fuel, oil,
engine speed and air filters
Loose wiring in generator Check connections
Automatic voltage regulator Call TEREX Service
stability setting may be
wrong
Loose wire on the automatic Check wiring
voltage regulator sensing lead
Low engine speed Engine speed adjustment Call TEREX Service
has slipped
Clogged fuel system Check for air leaks, clogged fuel
filter, kinked fuel line, or
clogged fuel pick-up tube
Blocked air intake Check air filter
Blocked exhaust system Check engine exhaust
system, remove
obstructions
Contaminated fuel Check fuel/water separator and
fuel tank for contamination.
Replace fuel if needed
Defective governor on engine Call TEREX Service
TROUBLESHOOTING (Cont.)
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