Complete Parts List available at www. MillerWelds.com
OM-228 042 Page 32
8-2. Gun Routine Maintenance
Stop engine and dis-
connect gun before
maintaining.
= Check
= Change
= Clean
= Replace
Reference
Every
Spool
Of Wire
Section 8-7
Gun Casing
Nozzle,
Contact Tip
Every 3
Months
Section 8-7
Cracked Parts
Cracked Parts
Cracked Parts
Cracked Parts
8-3. Welding Power Source Overload Protection
804 476-C
1
Supplementary Protector CB2
CB2 protects unit from overload. If
the unit is using 230 volts ac input
power and CB2 opens, unit shuts
down.
Reset supplementary protector.
1
Shown with optional cylinder rack
8-4. Drive Motor Protection And Tip Saver/Short Circuit Protection
A. Drive Motor Protection
Drive motor protection circuit protects drive motor from overload. If drive motor becomes inoperative, release gun trigger and wait until protection circuit
resets allowing drive motor to feed wire again.
B. Tip Saver/Short Circuit Protection
The tip saver/short circuit protection extends contact tip life and protects internal components from damage. If contact tip is shorted to workpiece, the
unit shuts down the welding output. To resume operation, release gun trigger to reset unit. If the contact tip has stuck to the workpiece, release gun
trigger, turn off unit, and remove contact tip from workpiece. Check contact tip and replace if damaged. Turn on unit to continue operation.
