Troubleshooting and repair – Lincoln Electric CLASSIC SVM194-A Manuel d'utilisation
Page 189
ALTERNATOR ROTOR REMOVAL
AND REPLACEMENT PROCEDURE (continued)
TROUBLESHOOTING AND REPAIR
F-67
F-67
CLASSIC® 300D & 300G
Replacement
9. Carefully mount the rotor onto the generator
shaft. Install a new sleeve collar (part num-
ber T14337), washer, and rotor locking nut.
NOTE: Be careful not to damage or deform
the new sleeve collar. Carefully tap
the new sleeve collar into position.
The rotor locking nut should be
torqued to 175 ft.-lbs.
After the rotor locking nut is properly
torqued, bend the washer down over the
locking nut.
Check rotor air gap. .017" minimum is
allowed.
10. Mount the brush holder assembly to the sta-
tor frame using two bolts, washers, and nuts.
Installing and Seating Exciter Slip Ring Brushes
a. Make sure the slip rings are clean and
free from oil and grease.
b. Spacing between the brush holder and
slip rings must be .050" to .090". Adjust
as required.
c. Before placing the exciter brushes in their
holders, twist the brush pigtail at its
entrance to the brush until the strands are
tightly packed and no part of the pigtail
protrudes beyond the brush surface in the
pigtail slot. When the brush is placed in
the holder, clear the pigtail from the side
of the holder to allow free radial move-
ment of the brush.
d. The exciter brush spring must lie flat on
the corner of the brush and not touch
either side of the retainer.
e. With the brushes in place, insert one end
of a minimum 24" long piece of 180 grit
sandpaper between the slip rings and
brushes (abrasive against brushes). With
slight additional finger pressure on top of
brushes, pull the paper around the cir-
cumference of the rings in the direction of
rotation only. Repeat this procedure until
the entire face of the brush is contoured
to the radius of the slip ring.
f. Check the brushes to be certain that there
is spring tension holding them firmly
against the slip rings.
11. Install the alternator cover and wrap-around.
12. Connect the negative battery cable.