SECTION 55 - ELECTRICAL SYSTEM
55-99
FUEL SYSTEM COMPONENTS
The fuel system consists of a fuel tank located in the
left side of the engine compartment at 1; fuel tank
pickup tube, 2; fuel tank sending unit, 3; in-line fuel
filter, 4; electric fuel pump, 5; injection pump, 6; and
return fuel line, 7, from the injector bleed off to the
tank. The fuel flow is controlled by an electric fuel
solenoid, 8, which is controlled by the EIC (Electronic
Instrument Cluster).
FUEL GAUGE
In the center of the EIC panel is the fuel gauge,
implemented as a vertical 10-segment green LED
bar graph. The lowest segments will flash when the
fuel level is low. An audible alarm will accompany the
flashing light for about 5 seconds.
121
FUEL TANK SENDING UNIT (Fuel level)
STEP
PRETEST INSTRUCTIONS TEST RESULT
PROBABLE CAUSE AND
CORRECTION
1 Loader on level with parking
brake engaged, key “ON”
position
Symptom: No bars lit
EIC gauge and
sender operation
Jumper wire from
one terminal to
other at sender
NO bars light up
YES (bars light up)
Check wires from sender to
EIC board, if OK, replace
EIC board
Replace sender
2 Symptom: Fuel level does not
read lower on gauge (too many
bars lit)
Disconnect
PU/W wire
Bars stay lit
Bars go out
Check for PU/W wire
shorted to ground. If OK,
replace EIC board.
Replace sender
FUEL SYSTEM ELECTRICAL DIAGRAM
PU/W
PU/O
T
LTBL/O
122
1. Key switch
2. EIC board
3. Fuel level sender
4. Electric fuel pump
5. Injector pump
6. Fuel shutoff solenoid
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