Evinrude 4906B 4HP 1969 Owner's Manual page 209

6-20 ELECTRICAL
CORRECT
Armature segments properly
properly cleaned (right).
the turn the upper cap on the shaft with the
other hand. The cap and shaft should turn
freely with no sign of binding.
these tests are not successful,
MUST be replaced.
• Check the amount of brush wear.
brush is worn more than 50% of its original
size, or to within 1/4" of the base, it should
be replaced. Replacement
a simple task. First,
retaining screw, and then remove the old
brush and install a new brush.
new brush in _place with the retaining screw.
If the armature
turning, it should be turned in a lathe to
ensure accuracy. The local generator
can perform this task, usually for a very
reasonable fee. If the turning
plished by other than generator shop person-
nel, the following words are necessary.
ter the turning, an undercut should be made.
The insulation between the commutator
should be 1-3/4 ",
the full width of the insulation
the bottom. A triangular
satisfactory. After
completed the slot
cleaned to remove any foreign material,
or copper dust.
LIGHTLY with "DO" sandpaper
any slight burrs left from the undercutting.
After all work has been completed,
unit again, on the growler.
INCORRECT
cleaned (left) and im-
If either of
the bear ing
If the
of the brushes is
remove the brush
Secure the
commutator requires
shop
is accom-
bars
This undercut must be
and flat at
groove is
the undercut work is
should be thoroughly
Sand the commutator
to remove
test the
ASSEMBLING
1- Slide the armature into the frame and
align the top armature cap with the dowel in
the frame.
when the dowel in the frame indexes into a
matching hole in the cap.
is moved into place, pull back on the brush-
es, and work them around the commutator
bar.
2- Install
studs of the field and armature.
Af-
be sure the dowel in the frame has indexed
with the hole in the cap.
3- Install the two thru-bolts
the complete assembly with the nuts.
4- Place the two bushings over the ter-
NOT
minal studs of the armature
cure the bushings in place with the washers
and proper nuts (one terminal is larger than
dirt
the other).
THE GENERA TOR
Proper alignment is achieved
As the armature
the end cap down over the
and secure
and field.
CD
Check to
Se-