TM 9-2320-387-24-l
REFERENCE INFORMATION
FUEL SYSTEM
The engine temperature must be below 90° F (32°C)
to get voltage here. If the engine is warm, either wait
for it to cool, or go to step C3 at the bottom of the
page and remember that the cold advance may be
the problem if everything else checks out OK.
The glow plugs or the intake/exhaust
system may
be faulty, so you should test them first.
DC VOLTAGE O-45 VOLTS
STEIICE-R TEST 99
1. Connect RED clip to positive, BLACK clip to
negative or ground.
2. Start Test 89, DC Volts.
3. Displayed reading is in volts.
BAlTERY VOLTAGE
MULTIMETER
1. Set the voltmeter to a DC volts scale of at least
40 volts.
The cold advance circuit advances the fuel injectton
pump timing approximately
3 to 5 degrees during
I
cold start-up.
If engine temperature is less than
90°F (32°C). then advance circuit operation may be
1
checked as follows:
4.
Start the engine.
Disconnect wire 6698 from the advance
solenoid. If the circuit is working correctly,
then engine rpm should decrease.
Look at the advance mechanism on the right
side of the fuel injection pump while you connect
and disconnect 5698 with the engine running.
The advance mechanism should move about
l/4 in.
If the advance mechanism is stuck, apply
some oil at the points shown and try again.
Remember to reconnect any wires
that were disconnected during
troubleshooting.
2. Connect the RED lead to positive and the
BLACK lead to negative.
3. Be sure to read the correct scale.
GLOW PLUG
CONTROLLER
NEL
i301i~010
I
”
WIRE 569B
ADVANCE MECHANISM
INJECllON PUMP AS SEEN
FROM REAR OF ENGINE
2-115
