Alternator Cleaning And Inspection - Jeep 1987 Wrangler Workshop Manual

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SMARTING SYSTEM - DELCO
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NO r E : If the bearing is in satisfactory condition,
it may be reused.
Press out the rear bearing from the rear housing
using the tube or collar that fits inside the
bearing housing. Press from inside of the
housing toward the outside.
NOTE:
Replace the rear bearing if its lubricant
supply is exhausted. Do not attempt to lubricate
and reuse a dry bearing.
ALTERNATOR GLEANING AND INSPECTION
CAUTION:
Do not clean the rotor with a
degreasing solvent.
Clean the rotor poles by brushing with oleum
spirits, or equivalent.
NOTE: Oleum spirits is a heavy, oily, and
strongly corrosive solution of sulfur trioxide in
anhydrous sulfuric acid.
Inspect the slip rings for contamination and
roughness. Clean with solvent. If necessary,
clean and finish the slip rings with commutator
paper, or 400 grit (or finer) polishing cloth. Do
not use metal-oxide paper. Spin the rotor in a
lathe or other rotatable support while holding the
abrasive against the rings.
NOTE:
When using an abrasive, support the
rotor while spinning to clean the slip rings
evenly. Cleaning the slip rings without support
may result in flat spots on slip rings. This will
cause brush noise and premature brush wear.
True rough or out-of-round slip rings in a lathe to
0.051 mm (0.002-in) maximum gauge indication.
Remove only enough material to make the rings
smooth and round. Finish with commutator
paper, or 400 grit (or finer) polishing cloth, and
blow away all dust.
CAUTION:
Do not clean the stator with a
degreasing solvent.
Clean the stator by brushing with oleum spirits,
or equivalent.
Inspect the brush springs for damage or
corrosion. Replace the springs, if there is any
doubt about their condition.
Inspect the brushes for wear or contamination. If
the brushes are to be reused, clean them with a
soft, dry cloth until it is completely free of
lubricant.
Inspect the condition of the brush holder screw
insulating washer/sleeves for broken or cracked
insulation (A).
Thoroughly clean the bridge rectifier, diode trio
and voltage regulator with a brush and high
pressure air.
84918A
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