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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 signifi-
cantly 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 no holes are obstructed.
3
2
New
Worn
Turn Off power source.
1
Shield Cup
Remove shield cup. Check cup for cracks,
and replace if necessary.
2
Tip
3
Opening
!
!
Turn Off power source before checking torch
parts.
6
5
1
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.
4
Electrode
Check electrode. If center has a pit more
than a 1/16 in. (2 mm) deep, remove and re-
place 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.
4
New
1/32 in. (1 mm) to 1/16
in. (2 mm) maximum pit
depth depending on
acceptable cut quality
Worn
5
Swirl Ring
Remove swirl ring. Check ring, and replace
if side holes are plugged.
6
O-Ring
Check O-ring for cracks or worn spots, and
replace if necessary.
Carefully reassemble parts in reverse order.
Ref. 253554-A
OM-254 449 Page 25