Fuel System Testing - New Holland LS140 Workshop Manual

FUEL SYSTEM TESTING

ELECTRIC FUEL PUMP
PRETEST
STEP
INSTRUCTIONS
1 Skid steer on level with
parking brake engaged,
key "OFF" position
2 Key "ON" position
Service/Run switch
"SERVICE" position
3 Key "ON" position
4 Key "ON" position
5 Key "ON" position
NOTE: Always check fuel level in tank. Always check fuel filters.
FUEL SHUTOFF SOLENOID
PRETEST
STEP
INSTRUCTIONS
1 Skid steer on level with
parking brake engaged,
key "ON" Service/Run
switchin "RUN" position
2 Key "ON" position,
Service/Run switch in
"SERVICE" position
3 Key "ON" position,
Service/Run switch
in "RUN" position
SECTION 10 - ENGINE
TEST
Fuel in tank
Fuel pump
operating
in
Fuel pump
operating but not
pumping fuel
Fuel pump
operating and
pumping fuel
Fuel pump
operating and
pumping fuel
TEST
Battery voltage to
solenoid
Battery voltage to
solenoid
Check EIC board
operation
10-91
PROBABLE CAUSE
RESULT
AND CORRECTION
NO Add fuel and bleed system
YES Go to next step
NO Check power supply
(5-amp fuse in cab panel)
If OK, replace pump
YES Go to next step
NO Check line to tank, air leak, fuel
level, tank pickup tube. If OK,
replace pump
YES Go to next step
NO Replace pump
YES Remove fuel line at
injector pump and bleed
system, if OK go to next
step
YES Check fuel shutoff solenoid for
operation
PROBABLE CAUSE
RESULT
AND CORRECTION
NO Check power wire from EIC to
solenoid for open,
if OK go to next step
YES Replace solenoid
NO Check power wire from
service run switch to fuel
solenoid, if OK go to next
step
YES Replace solenoid
NO Check power to EIC board
YES Replace EIC board
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