Electrical (Rev 1/97)
110
2. Connect the starter to a 12 volt battery as shown in the
illustration.
3. When the switch is turned on, check the current, volt-
age, and starter speed. The standard values are: 180
amps, 11 volts, 3,500 rpm.
Fuel Solenoid
Some of these engines are equipped with a fuel solenoid.
When the fuel solenoid is energized, it places the fuel rack
in the on position. This allows fuel to flow in the fuel injec-
tion pump. The fuel solenoid has two coils, the pull-in coil
and the hold-in coil. The pull-in coil must be momentarily
energized to place the fuel rack in the on position. The ener-
gized hold-in coil can then hold the fuel rack in the on posi-
tion. Use the following procedure to test the fuel solenoid:
1. Place a jumper wire between the black wire CH pin in
the fuel solenoid connector and a good chassis ground.
2. Test the pull-in coil by momentarily placing a jumper
between the 8DP pin in the fuel solenoid connector and
the 2 terminal at the fuse link. The fuel solenoid should
make a definite click when the pull-in coil is energized
and should click again when the pull-in coil is de-ener-
gized.
NOTE: The pull-in coil will draw 35-45 amps so do
not leave the jumper connected to the 8DP pin for
more than a few seconds.
a.
If the pull-in coil does energize, go to step 3.
b. If the pull-in coil does not energize, check the
resistance of the pull-in coil by placing an ohmme-
ter between the 8DP and the CH pin in the fuel
solenoid connector. The resistance of the pull-in
coil should be 0.2 to 0.3 ohms. If the resistance of
the pull-in coil is not in this range, replace the fuel
solenoid.
3. Test the hold-in coil.
a.
Energize the hold-in coil by placing a jumper
between the 8D pin in the fuel solenoid connector
and the 2 terminal at the fuse link.
b. Momentarily energize the pull-in coil by placing a
jumper between the 8DP pin in the fuel solenoid
connector and the 2 terminal at the fuse link. The
fuel solenoid should make a definite click when the
pull-in coil is energized, but should not click when
the pull-in coil is de-energized.
c.
De-energize the hold-in coil by removing the
jumper from the 8DP pin and the 2 terminal. The
fuel solenoid should make a definite click when the
hold-in coil is de-energized.
d. If the hold-in coil does not function properly,
check the resistance of the hold-in coil by placing
an ohmmeter between the 8D pin and the CH pin
in the fuel solenoid connector. The resistance of
the hold-in coil should be 24 to 29 ohms. If the
resistance of the hold-in coil is not in this range,
replace the fuel solenoid.
Fuel Solenoid Replacement
1. Disconnect the 20 wire from the reset switch to prevent
the reset from tripping.
2. Disconnect the fuel solenoid wire connector and
remove the old fuel solenoid.
3. Connect the fuel solenoid wire connector to the new
fuel solenoid.
4. Turn the unit on to energize the fuel solenoid.
NOTE: The fuel solenoid must be energized when it is
being installed. If not, the plunger and the linkage
may not line up correctly and the fuel solenoid will
not function properly.
