Lincoln Electric SVM194-A Purging AIR from Fuel System GM, 0L Engine, Idler Control Maintenance

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D5.3	MAINTENANCE			D5.3
Replace brushes when they wear within 1/4” of the pig-		PURGING AIR FROM FUEL SYSTEM (GM
kept on hand. Lincoln brushes have a curved face		3.0L ENGINE)
tail. A complete set of replacement brushes should be			WARNING
nance man seat these brushes by lightly stoning the
to fit the commutator. Have an experienced mainte-
commutator as the armature rotates at full speed until		Keep fuel clear of open flames or arcs, allow
contact is made across the full face of the brushes.		engine to cool before working on the fuel system.
After stoning, blow out the dust with low pressure air.		Wipe up any spilled fuel and do not start engine
To seat slip ring brushes, position the brushes in place.		until fumes clear.
Then slide one end of a piece of fine sandpaper		------------------------------------------------------------------------
between slip rings and brushes with the coarse side		The fuel system operates as follows, The fuel pump
against the brushes. With slight additional finger pres-		will operate for a maximum of 3 seconds when the igni-
sure on top of the brushes, pull the sandpaper around		tion switch is turned “ON”. The pump will restart once
the circumference of the rings - in direction of rotation		the start button is pushed and continue when the
only - until brushes seat properly. In addition, stone slip		engine starts. To purge the system of air if fuel lines
ring with a fine stone. Brushes must be seated 100%.		have been removed, the ignition switch can be toggled
		“ON” and “OFF” (at 3 second intervals) until fuel flows
Arcing or excessive exciter brush wear indicates a pos-		through the fuel return line in the neck of the tank.
sible misaligned	shaft. Have an authorized Field	The GM 3.0L engine does not require the system to be
Service Shop check and realign the shaft.
		bled. If the engine runs out of fuel and the tank is
IDLER CONTROL MAINTENANCE		refilled, the engine will restart within a few seconds if
		the engine is properly tuned.
	CAUTION	ENGINE MAINTENANCE
Before doing electrical work, disconnect the bat-		Refer to the engine operation and maintenance manu-
tery.		al for additional information on the engine.
------------------------------------------------------------------------
When installing a new battery or using a jumper battery

to start the engine, be sure the battery polarity is con- nected properly. The correct polarity is negative ground. Damage to the engine alternator and the TBI controller can result from incorrect connection.

• Proper operation of the idle control requires good grounding of the TBI controller, and battery.

• If desired, the welder can be used without automatic idling by setting the “Idler” switch to the “High” posi- tion.

NAMEPLATES

Whenever routine maintenance is performed on this machine - or at least yearly - inspect all nameplates and labels for legibility. Replace those which are no longer clear. Refer to the parts list for the replacement item number.

CLASSIC® 300D & 300G