ESAB MobileFeed 301 AVS, Instruction Manual

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6 MAINTENANCE
0558 012 634
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© ESAB AB 2016
6 MAINTENANCE
WARNING!
Make sure that the branch circuit or main disconnect switch is OFF or electrical
input circuit fuses are removed from the power source main supply before
attempting any inspection or work on the inside of the wire feeder. Placing the
power switch on the welding machine in the OFF position does not remove all
power from inside of the equipment.
WARNING!
Inspection, troubleshooting, and repair of this equipment should be undertaken
by a competent individual having at least general experience in the maintenance
and repair of semi-conductor electronic equipment. Maintenance or repair should
not be undertaken by anyone not having such qualifications.
6.1 Inspection and service
Keep equipment in clean and safe operating condition, free of oil, grease, liquid and metallic
particles which can cause short-circuits.
Regularly check cylinder valves, regulators, hoses and gas connections for leaks with soap
solution.
Check for and tighten loose hardware including electrical connections. Loose power
connections overheat during welding.
Immediately replace all worn or damaged power cables and connectors. Check for frayed
and cracked insulation, particularly in areas where conductors enter equipment.
The electrode wire and all metal parts in contact with it are electrically energized while
welding. Inspect these parts periodically for defective insulation and other electrical hazards.
WARNING!
If uninsulated cable and parts are not replaced, an arc caused by a bared cable
or part touching a grounded surface may damage unprotected eyes or start a fire.
Body contact with a bared cable, connector or uncovered conductor can shock,
possibly fatally.
Keep power cables dry, free of oil and grease and protected at all times from damage by hot
metal and sparks.
Clean dirt and metal particles from drive roll groove weekly; replace roll if badly worn.
6.2 Wire feeder
When soft wire is fed, the drive rolls may pick up metal from the wire surface. Accumulation
on the rolls may score the wire with resulting unwanted friction and incorrect feeding.
Inspect the rolls regularly and clean them with a fine-wire power brush. Avoid roughening, or
removing the hardness of groove surfaces in grooved rolls. Any roughening may score the
wire, just as the accumulation being removed may do.
6.3 Solenoid valve replacement
If there is no gas flow through the wire feeder, the gas solenoid valve may be clogged or
electrically malfunctioning and it should be replaced. When replacing the gas solenoid valve,
the inlet, with the word IN or the number "2", must face the rear of the unit.