TM-9-2320-387-24-1

TRUCK, UTILITY: S250 SHELTER CARRIER, 4X4, M1113

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE, VOLUME 1

DECEMBER 1997

CHANGE 1

TM-9-2320-387-24-1 - Page 175 of 1205

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

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