Changing Drive Roll Or Wire Inlet Guide; Replacing Gun Contact Tip - Miller Electric Millermatic 140 Auto−Set Owner's Manual

6-4. Changing Drive Roll Or Wire Inlet Guide

1
2
.030/.035 Groove
Stamped .024

6-5. Replacing Gun Contact Tip

Tools Needed:
.
A complete Parts List is available on-line at www.MillerWelds.com
3
.024 Groove
Stamped .030/.035
1
Remove guide by pressing on
barbed area or cutting off one end
near housing and pulling it out of
hole. Push new guide into hole from
rear until it snaps in place.
2
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 4-11).
3
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.
Y Turn
1
2
Cut off welding wire at contact tip.
Remove nozzle.
Remove contact tip and install new
contact tip. Reinstall nozzle.
2
1
Inlet Wire Guide
Drive Roll
Retaining Pin
802 984
Off power before
replacing contact tip.
Nozzle
Contact Tip
Ref. 802 399-A
OM-225 311 Page 37