Lincoln Electric SHIELD-ARC SVM128-A Service Manual page 89

F-35
Replacement
12. 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.
allowed.
13. 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.
INSTALLATION
ALTERNATOR ROTOR REMOVAL
AND REPLACEMENT (continued)
.017" minimum is
SA-250
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.
14. Install the alternator cover with the screw
and washer at top and the screws at the two
sides.
15. Install the panel below the control panel on
the case front.
16. Connect the negative battery cable.
17. Close and latch left and right side case
doors.
F-35