Lincoln Electric SVM194-A service manual Engine Protection System Test Procedure

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F-30	TROUBLESHOOTING AND REPAIR		F-30
	ENGINE PROTECTION SYSTEM TEST PROCEDURE (continued)
PROCEDURE		10. Shut off the engine and reconnect any one of
1. Open the side doors on the Classic® 300		the three leads that had been disconnected in
		steps 1 through 3, then start the engine and
	machine.	allow it to run. If the engine shuts down, the
NOTE: Secure the doors in the open position using		component that had just been connected is
	the door restraint system. If the machine	faulty and should be repaired or replaced.
	does not have a door restraint system,	11. If the engine continues to run after reconnect-
	remove the doors or securely restrain them	ing one of the wires, repeat step #9, connecting
	to prevent them from falling closed.	one of the two remaining wires, then repeat
Classic® 300D Perkins powered machines:		step #9 again connecting the last wire. Repair
		or replace any faulty component.
	CAUTION	Be certain to reconnect all lead wires and close the
The following procedure will temporarily disable		doors when testing and service is complete.
		Classic® 300D Kubota powered machines:
the engine protection system. Be absolutely certain		The Kubota engine control module will flash the
that engine temperature and oil pressure are with-
in the normal range. IF THE ENGINE IS PERMIT-		engine protection fault light, indicating where the
TED TO RUN WHITE OVERHEATED OR WITH		fault was detected. See the machine schematic for
TOW OIL PRESSURE, SEVERE ENGINE DAM-		a list of codes. Use this code to determine what
AGE WILL LIKELY RESULT, AND THE ENGINE		sensor or associated wiring is causing the problem
WARRANTY WILL NOT COVER THE DAMAGE.		and check the wiring.
Be absolutely certain that all wires are connected		The sensors and engine control unit are part of the
when the test is completed.		Kubota engine. If the wiring and connections are in
2.	Disconnect the lead wire connecting the PC	good condition, the engine should be serviced by a
	board to the engine coolant temperature gage	qualified Kubota service technician.
3.	or switch. See wiring diagram.
	Disconnect the lead wire connecting the PC
4.	board to the engine oil pressure switch.
	Disconnect the flash/sense lead connecting
5.	the PC board to the engine alternator.
	Insulate and/or position these leads so they
	cannot touch chassis ground, any other electri-
	cal conductor, or be damaged by any moving
	parts.
6. Start the engine and allow it to run.
7.	If the engine still shuts down, thoroughly check
	the three wires that had been disconnected in
	steps 1 through 3. Be particularly aware of
	damaged insulation, or anything that may
	cause one of these conductors to come in con-
	tact with chassis ground.

8. If no problems are discovered with the wiring or insulation, the Idler/Engine shutdown PC board is faulty and should be replaced.

9. If the engine continues to run with these wires disconnected, one of the engine protections switches is faulty or the engine alternator is faulty.

CLASSIC® 300D & 300G