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test
Connect
starting
motor
in
series
with
specified
12 volts
battery
and
an
ammeter
capable
of
indicating
1
000 amperes
Starter
motor
Diagnoses
of test
1
Low
speed
with
no
load and
high
current
draw
may
result
from the
following
1
Tight
dirty
or worn
bearings
2
Bent
armature
shaft
or
loosened
field
probe
3
Shorted
armature
Check
armature
further
4
A
grounded
armature
or
field
a
Remove
input
tenninal
b
Raise
two
negative
side brushes
from
commutator
c
Using
a
circuit
tester
place
one
probe
onto
input
tenninal and the
other
onto
yoke
d
I
f
tester
indicates
continuity
raise the
other
two
brushes and check
field
and
armature
separately
to
determine whether field
or
armature
is
grounded
2
F
allure
to
operate
with
high
current
draw may be
caused
by
the
Engine
Electrical
System
Specified
current
draw
and
revolu
tion
in
these
test
are
shown
in
Specifications
Switch
6
Battery
Et
Voltmeter
Ammeter
Ee026
Fig
EE 20 No load
l
ting
following
I
A
grounded
or
open
field coil
Inspect
the connection and
trace
circuit
with
a
circuit tester
2
Armature coil does
not
operate
Inspect
commutator
for
excessive
burning
In this
case
arc
may
occur
on
damaged
commutator
when
motor is
operated
with
no
load
3
Burned
out
commutator
bar
Weak
brush
spring
tension broken
brush
spring
rubber bush
thrust
out
of
mica
in
commu
tat
or
or
a
loose
contact
between
biush
and
com
mutator
would
cause
commutator
bar
to
burn
3
Low
current
draw
and
low
no
load
speed
would
cause
high
internal
resistance
due
to loose
con
nections
damaged
leads
dirty
corn
mutator
and
causes
listed
on
item
2
3
EE10
MAGNETIC SWITCH
ASSEMBLY TEST
Switch
o
Fv
IB
I
I
D
Battery
Starter
motor
EE351
FiN
EE 21 Circuit
ofmagndic
awitch
assembly
ted
If
the
starting
motor
check
is
OK
check
magnetic
switch
as
sembly
Connect
cables
between
negative
battery
tenninal and
start
ing
motor
M
terminal
positive
battery
terminal and
starting
motor
S
terminal
connecting
a
switch
in
series
as
shown
in
Figure
EE 21
With the switch
on
push pinion
back
to remove
all
slack and
measure
the clearance
l
between
pinion
front
edge
and
pinion
stopper
The
clearance should
be
held within
0
3
to
15
mm
0 012
to 0
059
in
If
neces
sary
adjust
it
by changing
or
adding
adjusting
washer
s
Adjusting
washers
are
available in to
two
different
sizes
0 5
mm
0
020
in
and
O S
mm
0
031
in
0 3
to
I S
rom
0 012
to
0 059
in
l
EE029
Fig
EE 22 MeO
uring
clearance
t
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