Section 6 − Maintenance &Troubleshooting; Routine Maintenance; Unit Overload; Changing Drive Roll And Wire Inlet Guide - Miller Electric Millermatic 212 Owner's Manual

SECTION 6 − MAINTENANCE &TROUBLESHOOTING

6-1. Routine Maintenance

n = Check
* To be done by Factory Authorized Service Agent
Every
3
Months
l Unreadable Labels
Every
6
OR
Months
~ Inside Unit

6-2. Unit Overload

Thermostats TP1 in rectifier SR1 and TP2 in stabilizer Z1 protect the unit from damage due to overheating. If TP1
and/or TP2 opens welding output will shut off, and the Over Temp light will turn on. Wait until Over Temp light turns off
before trying to weld.

6-3. Changing Drive Roll and Wire Inlet Guide

Tools Needed:
7/16 in
OM-232 384 Page 24
.
A complete Parts List is available at www.MillerWelds.com
Z = Change ~ = Clean
~ Weld Terminals
n Apply Light Coat Of Oil
Or Grease To Drive Motor
Shaft
2
1
3
!
Disconnect power
before maintaining.
l = Replace
nl Weld Cables
4
.
Maintain more often
during severe conditions.
Reference
1 Securing Screw
2 Inlet 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
different 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 4-13).
4 Drive Roll Securing Nut
Turn nut one click to secure drive
roll.
Ref. 804 914-A