TROUBLESHOOTING THE GENERATOR
Many troubleshooting procedures present hazards which can result in severe personal injury or
k%!!!%l
death. Only qualified service personne! with knowledge of fuels, electricity, andmachinery hazards
should perform service procedures. Review safety precautions on inside cover page.
AC Output Voltage
Too
High
Noisy Generator
I
1
1
I
benerator
Overheats
I
I
I
--
POSSIBLE
CAUSE
1.
Engine governor incorrectly
adjusted.
2.
Faulty electronic voltage
regulator
1.
Loose brush holder
2.
Worn generator end bearing
3. Rotor and stator rubbing
a. varnish lumps
b.
rotor misaligned with
cran kshaft
together due
to:
1.
Generator overloaded due
to
defective circuit
breaker
2.
Airflow restricted due
to
dirt
or
debris covering
vent openings in stator
housing
3. Stator windings covered
with oil or dirt
4.
Open, grounded, or shorted
circuit in rotor or
stator
CORRECTIVE ACTION
1.
Refer
to
Governor
section.
2. Check output voltage, if voltage
is over 135 on
120
volt units,
242 on 220 volt units,
or
264
on
240
volt
units, and frequency is correct, replace
the electronic voltage regulator.
1.
Tighten brush holder.
2. Replace end bearing.
3a. Check for varnish lumps
between rotor and stator
and remove as required.
3b.
Follow
specified assembly
procedures
to
correct
rotor to crankshaft alignment.
1.
Replace circuit breaker.
Do
Not exceed specified
load when operating set.
2.
Clean away all dirt
or
debris
as required.
3.
Clean stator windings
4.
Test each component
for
open,
grounded,
or
shorted
windings
and replace
if
defective.
c
.
8-6
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