TM5-6115-593-34
NAVFAC P-8-631-34
TO-35C2-3-463-2
(28 and 35) or sleeve bearing (53). Ensure
that bushing is started square and driven
straight into housings (21, 3 and 6) until
level with, or slightly below, thrust surface.
Bushings are sized to be a correct fit on
armature shaft when installed. Do not
ream, drill, or machine bushing.
(f)
Check fit of bushings or bearing on
armature (36). Correct clearance is 0.0015
to 0.003 inch (0.038 to 0.08 mm). If
bushing fits too tightly, it was incorrectly
installed; remove damaged bushing and
install a new one. If fit is too loose, check
armature shaft for wear.
(3) Replace armature (36) for any of the following
defects:
(a) Thrown solder due to overheating.
(b) Loose windings.
(c) Loose commutator bars.
(d) Bushing surface worn to the extent that
clearance between bushing exceeds 0.0015
to 0.003 inch (0.038 to 0.08 mm).
(e) Bushing surface scored to depth of more
than 0.003 inch (0.08 mm).
(f)
Damaged or uneven wear of splines.
(g) Shaft runout exceeds 0.005 inch (0.13 mm)
TIR.
(h) Presence of electrical opens, shorts, or
grounds.
(4) If commutator runout is over 0.005 inch (0.13
mm) or it is scored, uneven, or burned, repair as
follows:
WARNING
LATHE OR MILLING OPERATIONS
CREATE METAL PARTICLES WHICH
MAY ENTER THE EYES. WEARING
GOGGLES IS REQUIRED TO AVOID
INJURY TO PERSONNEL.
(a) Resurface commutator using armature and
undercutting lathe MIL-L-14576.
(b) After
machining,
undercut
insulation
between commutator bars to a depth and
width of 0.031 inch (0.79 mm).
CAUTION
Do not use emery cloth or paper for
the following operation. Emery dust
could cause electrical shorts in the
starter motor.
(c) After machining and undercutting, remove
any burrs from commutator using sandpaper
P-P105; do not use emery cloth. After
deburring, remove any sanding or copper
dust from slots between commutator bars.
WARNING
AVOID
BREATHING
FUMES
GENERATED
BY
SOLDERING.
REMOVE RINGS AND WATCHES. EYE
PROTECTION IS REQUIRED TO AVOID
INJURY TO PERSONNEL.
(5) Resolder any field coil leads as required, in
accordance with MIL-S-6872, using solder QQ-
S-571, Type SN 60, and rosin flux.(F)
Refer to
TO-00-25-234.
(6) If frayed field coil windings are present, wrap
with insulating tape and paint with insulating
varnish MS355632.
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