Universal M-18 - Alternator Repair Procedure; Alternator Troubleshooting; Removing Back Cover

Remove Brush Holder:
Remove two locknuts securing brush holder. Pull out brush holder. See illustration below.
(2) BRUSHOLDER
MOUNTING LOCKNUT
REMOVING
BRUSH HOLDE'R
Inspect
and Test Brush Assembly:
The illustration below shows the terminals brush arrangement and testing procedure. The original
brush set may be reused if the brushes are 3/16" or longer, and if brushes are not oil soaked,
cracked or show evidence of grooves on the sides of the brushes caused by vibration.
TEST
CONTINUITY
FROM A TO B
FROM C TO 0
NO CIRCUIT:
FROM A OR B
TO C OR 0
TEST WITH 12 VOLT DC
TEST LAMP
OR OHMMETER
BRUSH TEST
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