Hobart Welding Products HP-70, 700I manual Checking/Replacing Retaining Cup, Tip, And Electrode

.A complete Parts List is available at www.MillerWelds.com

6-5. 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.

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

2

6

5

4

3

New

Electrode Wrench

New

*Pit Depth

1

Worn

7*1/32 in. (1 mm) — 1/16 in. (2 mm) maximum pit depth depending on acceptable cut quality.

Worn

Replace tip if opening is

deformed or 50% oversized.

.Lightly tighten electrode using electrode wrench (15-20 in.lb (1.7-2.3 NVm).

Ref. 804 851-A

Turn Off power source.

1Shield Cup

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

2O-Ring

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

5Electrode

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

6Swirl Ring

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

Carefully reassemble parts in reverse order.

7Stand-off Guide

Placing the stand-off guide on the end of the torch provides an optional method of maintaining a 1/16 in. (1.6 mm) gap between tip and workpiece.

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