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5.3 Drive Roll Replacement
(See Figure 2)
The Weldmark Spool Gun comes with a .030" - .035" (0.8 - 0.9mm) drive roll.
If replacing the drive roll (if necessary), the procedure of replacement is as follows:
1. Unscrew the screw ⑥ .
2. Take out the drive roll ⑤ .
3. Put the drive roll in position and screw ⑥ to secure it to the wire driver.
5.4 Installing the Wire Spool and Threading the Welding Wire
(See Figure 5)
1. Remove cover ⑩ , nut ⑨ , and spool tension spring ⑧ in sequence. Load 4" (100mm)
wire ⑦ on the spindle, the direction of the wire running is counterclockwise. Reinstall
tension spring ⑧ & nut ⑨ .
2. Extend approximately 12" (300mm) of wire ② from spool. Straighten it out by back-
bending it. Use care to prevent the wire from unraveling.
3. Cut off bent end of wire, leaving 4" (100mm) long straight section.
4. Gently pull open the idle roll assembly to expose the drive roll groove. Guide straightened
wire through inlet wire guide ④ to drive roll groove ③ . While holding open the idle roll ⑤ ,
slide end of wire into the gun tube liner ① , continue to push the wire through until it
extends 2" past the gas diffuser.
5. Release the idle roll assembly and the straightened wire.
6. Tighten the wire feed tension knob ⑥ to a desired drive roll pressure to feed wire.
7. Screw on contact tip and nozzle.
8. Reinstall cover ⑩ & tighten nut ⑪ .
9. The gun is ready for operation.
Figure 5
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