SECTION 10 - ENGINE
10-87
FUEL SYSTEM TESTING
ELECTRIC FUEL PUMP
STEP
PRETEST
INSTRUCTIONS
TEST RESULT PROBABLE CAUSE AND
CORRECTION
1 Loader on level with
parking brake
engaged, key “OFF”
position
Fuel level in tank NO
YES
Add fuel and bleed system
Go to next step
2 Key “ON” position Fuel pump
operating
NO
YES
Check power supply (5-amp
fuse in cab panel) If OK,
replace pump
Go to next step
3 Key “ON” position Fuel pump
operating but not
pumping fuel
NO
YES
Check line to tank, air leak,
fuel level, tank pickup tube. If
OK, replace pump
Go to next step
4 Key “ON” position Fuel pump
operating and
pumping fuel
NO
YES
Replace pump
Remove fuel line at injector
pump and bleed system, if
OK go to next step
5 Key “ON” position Fuel pump
operating and
pumping fuel
YES Check fuel shutoff solenoid
for operation
NOTE: Always check fuel level in tank. Always check fuel filters.
FUEL SHUTOFF SOLENOID
STEP
PRETEST
INSTRUCTIONS
TEST RESULT PROBABLE CAUSE AND
CORRECTION
1 Loader on level with
parking brake
engaged, key “ON”
position, service “RUN”
switch in “RUN”
position
Battery voltage to
solenoid
NO
YES
Check power wire from EIC
to solenoid for open, if OK go
to next step
Replace solenoid
2 Key “ON” position,
service “RUN” switch
in “SERVICE” position
Battery voltage to
solenoid
NO
YES
Check power wire from
service run switch to fuel
solenoid, if OK go to next
step
Replace solenoid
3 Key “ON” position,
service “RUN” switch
in “RUN” position
Check EIC board
operation
NO
YES
Check power to EIC board
Replace EIC board