Hobart Hobart - AirForce 250A AirForce 250A

- Check Compressor Filter −Clean With A Damp Cloth Or Replace If Necessary (Compressor Model Only);

If certain problems occur, the trouble light comes on, and output stops

a) Lights if shield cup is loose. Turn power Off, and check shield cup connection (see Item 2 below). Power must be reset whenever the cup shutdown is activated. Check shield cup shutdown system once a week

b) Lights if power source overheats (see Sections 4-3 and 4-5)

c) Lights if input power is not within specification (93 to 137 vac). Power must be reset whenever the input voltage shutdown is activated

Turn Power On and loosen shield cup. If shutdown system works properly, trouble light comes on. If not, turn power Off and check for loose shield cup. Check consumables (see Sections 6-4 and Parts List)

If system works properly, retighten cup and reset power;

Check Torch Tip, Electrode, And Shield Cup

Remove shield cup. Check cup for cracks, and replace if necessary

Check O-ring for cracks or worn spots, re- place shield cup if necessary

Remove tip. Check tip, and replace if open- ing is deformed or 50% oversize; If inside of tip is not clean and bright, clean with steel wool. Be sure to remove any pieces of steel wool afterwards

If torch or work cable needs to be removed or replaced, proceed as follows: Turn power Off, and disconnect input power plug from receptacle

Remove existing torch cable from unit

Insert cable through strain relief

Slide strain relief nut onto torch cable, but do not tighten