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This spool gun has been engineered to need minimal service providing that a few very simple steps are taken to properly
maintain it.
1.
Keep the spool cover and tension mechanism cover closed at all times unless the wire needs to be changed or the drive
pressure needs adjusting.
2.
Keep all consumables (contact tips, nozzles, and liner) clean and replace when necessary. See “Consumable
Maintenance” (below) and “Troubleshooting” for detailed information.
3.
Avoid directing grinding particles towards the spool gun. These conductive particles can build up inside the spool gun
and cause severe damage.
4.
Periodically clean dust, dirt, grease, etc. from your equipment.
WARNING: DISCONNECT FROM POWER SOURCE WHEN CARRYING OUT THIS OPERATION.
5.
The wire feed drive roller will eventually wear during normal use. With the correct pressure, the idler roller must feed the
wire without slipping. If the grooves in the wire feed drive roller are worn deep enough that the idler roller and the wire
feed drive roller make contact when the wire is in place between them, the wire feed drive roller must be replaced.
6.
Check all cables periodically. They must be in good condition and not cracked.
WARNING: ELECTRIC SHOCK CAN KILL!
Be aware that the ON/OFF SWITCH, when OFF, does not remove
power from all internal circuitry in the welder. To reduce the risk of electric shock, always unplug the welder from its AC
power source and wait several minutes for electrical energy to discharge before removing side panels
IT IS VERY IMPORTANT TO MAINTAIN THE CONSUMABLES TO AVOID THE NEED FOR
PREMATURE REPLACEMENT OF THE GUN ASSEMBLY.
MAINTAINING THE CONTACT TIP:
The purpose of the CONTACT TIP is to transfer welding current to the welding wire while allowing the wire to pass through it
smoothly.
Always use a contact tip that is stamped one size larger in diameter than the welding wire it will be used with.
1.
If the wire burns back into the tip, remove the tip from the gun and clean the hole running through it with an oxygen-
acetylene torch tip cleaner or tip drill. If the burned-back wire cannot be removed, the tip will have to be replaced.
2.
With extended use over time, this hole will become worn. Increased wear on the hole causes increased resistance in the
transfer of welding current from the contact tip to the wire. This will result in less stable arc characteristics and difficult
arc starting.
REPLACING THE LINER:
The liner routes the wire from the welding wire spool, through the handle, and into the wire feed mechanism. This liner is
standard White Teflon (PTFE) Material (ID 2mm, OD 4mm).
1.
Using a pair of pliers, grip the free end of the liner that is protruding from the liner inlet guide. This is found inside of the
spool cover housing. Gently pull the old liner completely out of the gun.
2.
Spare liners can be purchased from Forney Industries directly, or large quantities of liner material can be purchased
online at a discounted price. The liner is standard white Teflon (PTFE) with ID = 2mm, OD = 4mm.
a. If making your own liner with material purchased online or elsewhere, cut the liner to approximately 8 inches in
length.
i.*NOTE: Be sure to uncrimp the bore of the liner after cutting!
b. Gently slide the new liner into the liner inlet guide of the spool gun until you feel it seat into position.
c. Cut off any excess that is protruding from the liner inlet guide. Approximately ¼” to ½” inch should protrude when
cut to the correct length.
d. Test that the liner is seated properly by running a length of wire through the liner until it enters the wire feed
mechanism. This should be very smooth. If you feel any kinks or snags, re-seat the liner.
Maintenance & Servicing
General Maintenance
