224
1
2.
Inspect
th
e O-ring se
al
(F
igur
e
36
)
in
the right-
hand
end
cap: repl
ace
if
necessary.
13.
In
stall the
ri
ght-hand
end
cap.
14
.
In
spect the O-ring seal (
Figure
37
) in the left-
hand end cap; replace
if
necessary.
15
. Align the raised lab
on
the negati
ve
(-)
brush
holder with the locating notch (
Figure
38
)
in
the
righI-hand end
cap
and install the cnd cap.
16
. Align the raised marks on the
ri
ght hand
end
cap with the notch on the left-hand end cap (Figure
39
).
17
. Apply blue
LOClilc
Threadlock
er No. 242 to
the case screw threads
prior
to installation. Insta
ll
the case screws (."igure 40) and washers. then
lig
ht
en securel
y.
Inspec
ti
on
1.
Meas
ure
the length
of
each brush (
Figur
e
41
)
with a
ve
rnier caliper.
(f
the length
is
9.0 mm (0.35
in.) or less
fo
r
anyone
of
the
bru
she
s.
the brush
sets
mu
st be replaced. The brushes
ca
nnot
be
repla
ced
individua
ll
y.
2. Inspect the
commutator
(A.
Figure
42). The
mica
in
a good commutat
or
is below the surfa
ce
of
the
copper
bars. On a worn
co
mmutator. the
mica and
copper
bar
s may be worn to the same
level (
Figure
43). If
necessary.
have
the
commutator serviced
by
a
deale
r
or
elect
ri
ca
l
repair
sho
p.
3.
Inspect the co
mmutator
coppe
r bars for
discoloration. If a pair
of
bars are discolor
ed.
grounded armature coils are indicated.
CHAPTER
EIGHT
®
I
®
•
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