Miller Electric XR W, XR A manual Adjusting Hub Tension, Overload Protection

6-10. Adjusting Hub Tension

Turn On welding power source and wire feeder to make this adjustment.

			1	Wire Speed Control
			Adjust control to wire speed for
			welding.
			2	Jog Switch
		2	Push up, and then release Jog
			switch. Hub tension is okay if wire
	3		unwinds freely, but wire does not
1			backlash when Jog switch is
			released.
			3	Cap Screw
			Turn cap screw to adjust hub ten-
			sion. Do not overtighten. Turn Off
			welding power source and wire
			feeder. Close and latch door.

Tools Needed:

7/16 in

151 666-E / Ref. 802 536 / Ref. 176 700-A

6-11. Overload Protection

3

1 Push And Turn

2

Pull Out And Replace F1

Push And Turn

Turn Off wire feeder and welding power source.

If F1 opens, the unit shuts down. To check or change F1, proceed as follows:

1Fuse Holder Cover

2Fuse F1 (See Parts List For Rating)

Insert new fuse into cover, and in- stall fuse with cover by pressing and turning cover clockwise.

3 Circuit Breaker CB1

If CB1 opens, the gun drive motor and contactor will not operate, but gas flows when trigger is pulled. The gun drive motor operates in the Jog mode with CB1 open.

Check for blocked gun liner.

Check for jammed wire, binding drive gear or misaligned drive rolls in feeder. Correct problem.

Allow cooling period and manually reset breaker. Close and latch door.

Ref. 151 779-A / Ref. 800 185-A

6-12. Water Flow Switch (Optional For Water-Cooled Models)

The water flow switch protects the gun from overheating. If coolant flow rate drops below 1 qt/min, the water flow switch opens and stops the welding wire from feeding. See Section 6-13for remedies to this trouble.

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