Miller Miller Arc Welding Power Source And Wire Feeder Millermatic 175 Millermatic 175

Turn Off power before replacing contact tip.

Cut off welding wire at contact tip.

Welding wire cut off at contact tip?

Remove contact tip and install new contact tip.

Turn Off welding power source/wire feeder and disconnect gun.

Remove switch housing. Install new switch and connect leads (polarity is not important).

Reassemble in reverse order. If replacing head tube, continue to end of figure.

Loosen jam nut. Remove from vice and turn head tube out by hand.

Hand-tighten head tube into cable connector.

Place head tube in vice and tighten until nuts are tight.

Remove nozzle, contact tip, adapter, gas diffuser, and wire outlet guide

Lay gun cable out straight before installing new liner

Cut liner off 3/4 in (20 mm) (3/8 in [9.5 mm] for aluminum) from head tube

Install adapter, contact tip, and nozzle

Sign off on the gun liner maintenance

Check weld terminals for cleanliness and tightness

Every 6 months or monthly during heavy service

Warning: Ensure the machine is powered off before starting the procedure

Inlet Wire Guide removed successfully

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Drive roll threaded in the groove closest to the motor shaft

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Drive roll secured over retaining pin

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