Lincoln Electric SVM194-A service manual Engine Fuel System Voltage Test Procedure

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F-28	TROUBLESHOOTING AND REPAIR	F-28
	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.

CLASSIC® 300D & 300G