Hobart Welding Products OM-474 manual Engine, Coolant temperature gets too high see Section

Trouble	Remedy
	Have Factory Authorized Service Agent check brushes and slip rings, and field current regulator board
	PC1.
High output at optional auxiliary power	Check engine weld/power speed, and adjust if necessary (see Section 7-5).
plant.
	Have Factory Authorized Service Agent check field current regulator board PC1.

C. Engine

Trouble	Remedy
Engine does not start.	Check fuel level. Open fuel shutoff valve (see Section 4-4).
	Check battery and replace if necessary (see Section 4-2).
	Check oil and coolant levels. Automatic shutdown system stops engine if oil pressure gets too low or
	coolant temperature gets too high (see Section 4-4).
	Check engine control switch, and replace if necessary.
	Check glow plug fuse wire. If wire is open, contact Factory Authorized Service Agent.
	Check Magnetic Shutdown switch MS1 fuse F and replace if open (see Section 7-7).
	See engine manual.
	Have Factory Authorized Service Agent check engine charging system.
Engine uses oil during run-in period;	Dry engine.
wetstacking occurs.
	See engine manual.
Battery discharges between uses.	Clean battery, terminals, and posts with baking soda and water solution; rinse with clear water.
	Periodically recharge battery (approximately every 3 months).
	Replace battery (see Section 4-2).
	Have Factory Authorized Service Agent check engine charging system.
Engine idles, but does not come up to	Check engine control switch and replace if necessary.
weld/power speed.
	Have Factory Authorized Service Agent check idle module and current transformer CT1.
Engine does not run at idle speed.	Move Optional Process switch to Stick position (see Section 5-1). Unit does not run at idle speed
	when operated in MIG (CV) mode.
Engine slowly stopped and cannot be	Check fuel level. Open fuel shutoff valve (see Section 4-4).
restarted.
	Check oil and coolant levels. Automatic shutdown system stops engine if oil pressure gets too low or
	coolant temperature gets too high (see Section 4-4).
	See engine manual.

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