Onan MEP-003A - Page 57

TM5-6115-585-34
NAVFAC
P
-
8-262-12
TO
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35C2-3-455-2
TM
-
056840-34
( 4 ) Testing Brushes . See Operator and
Organizational Maintenance Manual .
( 5 ) Testing Brush Springs . Measure brush spring
tension with a tension meter . See figure 5-7 . Push
the
brush
and take a
reading
just as the
brush
pro
jects a little from the brush holder . On a new brush
the spring tension should be 32 to 40 ounces . If brush
spring tension is below 20 ounces , replace .
2
( 6 ) Testing Solenoid Switch ( see figure 5-2 ) .
(a )
Check
to
be
sure
plunger
moves
freely
in
coil
.
Measure
the
pull
-
in
coil
current
draw
by
using
Test
A.
Current
should
not
exceed
16
amps
.
(b )
Measure the
hold
- in
coil
draw
using
Test
B.
Current
should
not
exceed
6
amps
.
(
c
)
Total
hold
and
pull
current
draw
using
Test
C
is
22
amps
.
Total
current
draw
should
not
exceed
25
amps
.
Replace
a
bad
solenoid
.
f
.
Repair
.
1.
Tension
gauge
2.
Brush
spring
3. Brush
TS
6115-585-34
/ 5-7
( 1 )
Repairing
Starter
. Repair
starter
by
replacing
defective
components
. Repair
procedures
for
individ
ual
components
are
given
below
.
Figure
5-7
.
Testing
Brush
Spring
Tension
COMMUTATOR
SHAPE GROOVE IN MICA
WITH 3 - CORNERED FILE
UNDERCUT
MICA
WITH
PIECE
OF
HACKSAW
BLADE
MICA
SEGMENT
SEGMENT
MICA
RIGHT WRONG
MICA
MUST
BE
CUT
AWAY
CLEAN
BETWEEN
SEGMENTS
MICA
MUST
NOT
BE
LEFT
WITH
A
THIN
EDGE
NEXT
TO
SEGMENTS
TS 6115-585-34 / 5-8
Figure 5-8 . Undercutting Mica
5-6