Checking/Replacing Retaining Cup, Tip, And Electrode - Hobart Welders AirForce 250ci Manuel Du Propriétaire

6-3. Checking/Replacing Retaining Cup, Tip, And Electrode

!
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.
Make sure this area is clean of
any debris.
Make sure swirl ring is clean of any
debris and
obstructed.
4
3
New
Worn
Replace tip if opening is
deformed or 50% oversized.
Turn Off power source.
1 Shield Cup
Remove shield cup. Check cup for cracks,
and replace if necessary.
2 O-Ring
Check O-ring for cracks or worn spots and
replace, if necessary.
3 Tip
.
A complete Parts List is available at www.HobartWelders.com
!
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.
!
Turn Off power source before checking torch parts.
no holes are
4 Opening
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.
2
6
5
New
*Pit
Depth
1
Worn
7
*1/32 in. (1 mm) — 1/16 in. (2 mm)
maximum pit depth depending on
acceptable cut quality.
.
Lightly tighten electrode
using electrode wrench
(15-20 in./lb (1.7-2.3 NVm).
6 Swirl Ring
Remove swirl ring. Check ring, and replace
if side holes are plugged.
Carefully reassemble parts in reverse order.
7 Stand-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.
Electrode
Wrench
Ref. 804 851-A
OM-230 455 Page 23