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_ _ ter
tery y term
termina
inal l post
post. . Conn
Connect
between disconnected lead and battery terminal post.
between disconnected lead and battery terminal post.
(4) Connect a test voltmeter with . . l l O volt scale di-
(4) Connect a test voltmeter with
visions between battery positive post and starter switch
visions between battery positive post and starter switch
terminal
terminal
at
at
starter.
starter.
(5) Crank engine cmd observe readings on volt-
(5) Crank engine cmd observe readings on volt-
meter and ammeter. The voltage should not exceed .12
meter and ammeter. The voltage should not exceed
volt per 100 amperes of current. The current should not
volt per 100 amperes of current. The current should not
exceed 150 to 250 amperes. A reading of voltage that
exceed 150 to 250 amperes. A reading of voltage that
exceeds
exceeds .12
.12 volt per 100 amperes indicates the
volt per 100 amperes indicates the re is
high
high
resistance
resistance
caused
caused
defective cable, burned switch contacts or, in some
defective cable, burned switch contacts or, in some
instances, a short in starter which causes a voltage
instances, a short in starter which causes a voltage
leak. A current that is high and is combined with slow
leak. A current that is high and is combined with slow
cranking speed, indicates that starter should be re-
cranking speed, indicates that starter should be re-
moved and repaired.
moved and repaired.
3. REMOVAL OF STARTING MOTOR
3. REMOVAL OF STARTING MOTOR
( 1) Disconnect cable at battery.
( 1) Disconnect cable at battery.
(2) Remove starter cable at starter.
(2) Remove starter cable at starter.
(3) Disconnect solenoid lead wire from solenoid.
(3) Disconnect solenoid lead wire from solenoid.
B B R R U U S S H H S S E E T T - - - - - -
WASHER
WASHER
BRUSH SPR IN
BRUSH SPR
ect an
an 0 0 to to 300
300 sca
scale le amm
ammete
O volt scale di-
from
from
loose
loose
circuit
circuit
connections,
connections,
CAP
CAP
Y Y
ING G
Fig. I-Starting Motor (Exploded View) (Typical)
Fig. I-Starting Motor (Exploded View) (Typical)
eter r
and housing seal.
and housing seal.
4. TESTING THE STARTER MOTOR
4. TESTING THE STARTER MOTOR
(BENCH TEST)
(BENCH TEST)
F F ree Running
ree Running T T e e st st
( 1) Place starter in vise and connect a fully-charged,
( 1) Place starter in vise and connect a fully-charged,
.12
12 volt battery to starter as follows:
12 volt battery to starter as follows:
(2) Connect a test ammeter (100 amperes scale)
(2) Connect a test ammeter (100 amperes scale)
and carbon pile rheostat in series with battery posi-
and carbon pile rheostat in series with battery posi-
re is
tive post and starter terminal.
tive post and starter terminal.
(3) Connect voltmeter (15 volt scale) across starter.
(3) Connect voltmeter (15 volt scale) across starter.
(4)
(4)
Rotate
Rotate
carbon
carbon
(5) Connect battery cable from battery negative
(5) Connect battery cable from battery negative
post to starter frame.
post to starter frame.
(6) Adjust rheostat until battery voltage shown on
(6) Adjust rheostat until battery voltage shown on
voltmeter reads 11 volts.
voltmeter reads 11 volts.
(7) The current draw should be 78 amperes maxi-
(7) The current draw should be 78 amperes maxi-
at 3800 minimum rpm.
at 3800 minimum rpm.
mum
mum
Stall Test
Stall Test
( 1) Install starter motor in test bench.
( 1) Install starter motor in test bench.
\ \
\ \
WASHERA
WASHERA
1 1
'1
'1
O O
E P IEC
E P
IECE E
P P
L L
\ \
iC
iCRE
RE W
W
FRAME
FRAME
pile
pile
to
to
full-resistance
full-resistance
FORK
FORK
H& J J SlNG
H&
SlNG
C C LU
LU T T C C H H
position.
position.
61 xl8
61 xl8
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