TM 55-1730-229-34
AG 320A0-MME-000
TO 35C2-3-473-2
TM 1730-34/1
CHAPTER 7
MAINTENANCE OF IGNITION SYSTEM
DESCRIPTION.
Refer to TM 55-
7-1.
1730-229-12 for a description of the
i g n i t i o n system.
Do not scratch or score commutator
s u r f a c e during disassembly.
STARTER ASSEMBLY.
7-2.
TM
55-
See
Remove/Install.
1 7 3 0 - 2 2 9 - 1 2 , paragraph 4-84.
Inspect/Replace
Starter
Brushes .
( S e e figure 7-1.)
(1) Dimensionally check length of
Length of each brush shall
each brush.
not be less than 0.31 inch. (Length of
(f) Remove mount end bell (13)
n e w brush is 0.51 inch.)
and armature assembly (14) from the
(2) Verify that brush assemblies
housing and commutator assembly (17).
a r e properly seated and that 75 percent
o f b r u s h s u r f a c e s a r e contacting
the
(g) Remove shim washers (16) and
commutator.
p r e l o a d washers (15).
(3) If brush assemblies do not
meet the requirements of steps (1) and
(h) Use low pressure air in a
( 2 ) , perform the following procedures.
v e n t i l a t e d area to blow carbon dust from
all parts of the disassembled starter
motor.
(a) Loosen three screws (2) and
r e m o v e the brush access cover assembly
(i) Install
preloaded
washer
(1) by sliding off.
(15) and shim washer (16) to same thick-
n e s s as recorded at disassembly to reas-
(b) Remove eight screws (3),
lockwashers (4), flat washers (5) with
s e m b l e to original configuration.
wiring terminals (6, 7) from brush
(j) Reinstall mount end bell
s p r i n g cap (8) .
( 1 3 ) and armature assembly (14) into the
h o u s i n g and commutator assembly (17),
(c) Remove four brush spring
a n d align scribe marks.
c a p s (8), springs (9) and brushes (10).
(k) Reinstall four washers (12)
( d ) Scribe an alignment mark on
Tighten bolts (11) to
e n d bell (13), and on housing and com-
and bolts (11).
2 5 inch-pounds torque.
m u t a t o r assembly (17).
(l) Install four
new
brushes
(e) Remove four bolts (11) and
( 1 0 ) into brush holders.
w a s h e r s (12).
7-1
