Troubleshooting and repair – Lincoln Electric CLASSIC SVM194-A Manuel d'utilisation
Page 150
ENGINE FUEL SYSTEM VOLTAGE TEST PROCEDURE (continued)
PROCEDURE
1. Open and secure the side door.
NOTE: Secure the doors in the open position using
the door restraint system. If the machine
does not have a door restraint system,
remove the doors or securely restrain them
to prevent them from falling closed.
Perkins powered models:
Locate the fuel solenoid and attach a voltmeter to
the leads. Turn on the run/stop switch. Within 30
seconds, read the voltage on the meter. The volt-
age should read about 12 VDC. Voltage should
also be checked at the fuel pump for models that
have one. See wiring diagram.
Note: The engine protection system will shut off the
power to both the solenoid and the fuel pump
if the engine is not started within about 30
seconds. Move the run/stop switch off then
on again to reset.
If battery voltage is present at the solenoids and
the fuel pump (If equipped), and the starter motor
is cranking the engine normally, the problem is like-
ly in the engine. Engine problems should be diag-
nosed and repaired by a qualified Perkins engine
technician.
If battery voltage is not present, check for a tripped
fuel system circuit breaker (Earlier units only)
Check the wiring and connections on the
Idle/Engine protection PC board, the engine fuel
system injection pump solenoid, the fuel pump (for
engines having an electric fuel pump.), and chas-
sis ground. Look for dirty, corroded, or damaged
terminals, including the Molex terminals connect-
ing the wiring to the PC board. Look for poor crimp
connections and damaged wiring.
Check that the PC board is getting battery voltage
from the run/stop switch and that it is securely
grounded.
If the board is getting power, is properly grounded,
and the wiring and connections described above is
in good condition, replace the PC board.
TROUBLESHOOTING AND REPAIR
F-28
F-28
CLASSIC® 300D & 300G