STATOR CHECKS
If an ohmmeter reads low or lamp lights
when connected from an stator lead to bare metal on the
test the delta stator for shorts or opens.
Noticeable discoloration at any place on
the assembly usually indicates defective
stator windings.
RECTIFIER BRIDGE CHECK
The rectifier is the number one failed component on the CS-130 alternator.
To check rectifier bridge, connect ohmmeter
using low scale from bridge terminal to
heat sink, then reverse connections
(Figure 8). If both readings are the
same. replace the rectifier bridge.
Connect from other two terminals to heat
sink in same manner to check other two
diodes. Connect between three terminals and
base plate (Figure 8) to check remaining
three diodes in rectifier bridge. Notice:
Some digital ohmmeters cannot be used to
check diodes in rectifier bridge.
Consult
REGULATOR
The regulator cannot be checked with
an ohmmeter. Use only an approved tester to test regulators of this
type.
BRUSH HOLDER
If the brushes are to be reused, clean with
a soft, dry, cloth.
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Replace the brush
holder assembly if brushes are
excessively worn.
SLIP RING SERVICING
It the slip rings are dirty, they may be
cleaned and finished with 400 grain or
finer polishing cloth. Spin the rotor.
and hold the polishing cloth against the
slip rings until they are clean.
CAUTION: The rotor must be rotated in
order that the slip rings are cleaned evenly.
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Cleaning the slip rings by hand with-out
spinning the rotor may result in flat
spots on the slip rings, causing brush
noise. Slip rings that are rough or out
of round should be trued in a lathe to
002 inch maximum indicator reading. Remove only
enough material to make the rings smooth
and round. Finish with 400 grain or
finer polishing cloth and blow away all
dust.
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