Hobart Welding Products 140 Changing Drive Roll Or Wire Inlet Guide, Replacing Gun Contact Tip

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7-4. Changing Drive Roll Or Wire Inlet Guide

1

3

2

4

Tools Needed:
.030/.035 Groove	.023/.025 Groove

1Inlet Wire Guide Securing Screw

2Inlet Wire Guide

Loosen screw. Slide tip as close to drive rolls as possible without touching. Tighten screw.

3 Drive Roll

The drive roll consists of two differ- ent sized grooves. The stamped markings on the end surface of the drive roll refers to the groove on the opposite side of the drive roll. The groove closest to the motor shaft is the proper groove to thread (see Section 5-9).

4 Retaining Pin

To secure drive roll, locate open slot and push drive roll completely over retaining pin, then rotate drive roll (1/4 turn) to closed slot.

Stamped .024

Stamped .030/.035

Ref. 803 714-A

7-5. Replacing Gun Contact Tip

Y Turn Off power before replacing contact tip.

1 Nozzle

2 Contact Tip

Cut off welding wire at contact tip.

Remove nozzle.

Remove contact tip and install new contact tip. Reinstall nozzle.

2

Tools Needed:

1

Ref. 802 399-A

OM-925 Page 25