Service Manual for WP6 Diesel Engine
102
d) Unstable charging voltage
Fault 4: Unstable charging voltage
When the engine is running
normally, voltmeter
indicates charging, but the
pointer is always oscillating
and cannot be read (or
charging indicator
twinkling)
a. Generator belt and relevant
pulley belts are loose.
b. Bad contact in charging
circuit.
c. Collecting ring accumulates
too much dirt, or electric
brush is severely worn, or
brush spring is weak or
broken.
d. Damaged regulator.
a. Tighten generator belt and
relevant pulley belts.
b. Check and fasten all
connectors in charging
circuit.
c. Clean the dirt, or replace
the brush and brush spring.
d. Replace the regulator.
e) Generator produces abnormal sound
Fault 5: Generator produces abnormal sound
Running generator produces
abnormal sound
a. Generator fixed support is
deformed or interfered with
other parts.
b. Generator belt is loose and
slipping.
c. Generator pulley is loose.
d. Generator bearing lack of
lubricating oil or is damaged.
e. Deep abnormal noise comes
from generator inside.
f. Howling noise comes from
generator inside and changes
with generator speed.
a. Improve generator fixed
support installation
strength and adjust
installation condition.
b. Replace generator belt.
c. Fasten the pulley.
d. Replace generator bearing.
e. Stator coil is in short
circuit, replace it.
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