Miller Electric pmn warranty Checking/Replacing Retaining Cup, Tip, And Electrode

6-4. Checking/Replacing Retaining Cup, Tip, And Electrode

! Overtightening will strip threads. Do not overtighten retaining cup during assembly. Do not cross-thread parts causing stripping. Use care during torch assembly and parts replacement.

! Inspect shield cup, tip, and electrode for wear before cutting or whenever cutting speed has been significantly reduced. Do not operate torch without a tip or electrode in place. Be sure to use genuine replacement parts.

.A good practice is to replace both the tip and electrode at the same time.

! Turn Off power source before checking torch parts.

Make sure this area is clean of any debris.

	8
Make sure swirl ring is clean of any	6
	7
debris and no holes are obstructed.

4

3

1

2

New

Worn

5

New

1/32 in (1 mm) to 1/16 in (2 mm) maximum pit depth depending on

acceptable cut quality

Worn

802 465

Turn Off power source.

1Shield Cup

2O-Ring

Remove shield cup. Check cup for cracks, and replace if necessary.

Check O-ring for cracks or worn spots, re- place shield cup if necessary.

3Tip

4Opening

Remove tip. Check tip, and replace if open- ing is deformed or 50% oversize. If inside of tip is not clean and bright, clean with steel wool. Be sure to remove any pieces of steel wool afterwards.

5 Electrode

Check electrode. If center has a pit more than a 1/16 in (2 mm) deep, remove and re- place electrode.

6 Swirl Ring

7 O-Ring

Remove swirl ring. Check ring, and replace if side holes are plugged.

Check O-ring for cracks or worn spots, replace swirl ring if necessary.

8 O-Ring

Check O-ring for cracks or worn spots, and replace if necessary.

Carefully reassemble parts in reverse order.

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