ESAB PT-31XL Manual De Uso página 67

SECTION 4
!
WARNING
Before any maintenance is at-
tempted on this torch, make sure
the POWER SWITCH on the power
source is in the OFF position and
the PRIMARY INPUT POWER is
DEENERGIZED.
Heat Shield
Nozzle
Swirl Baffle
Electrode
Plunger
Torch
Fig. 2 - Front End Assembly
1. To disassemble the front end, hold the torch with the shield in an upright position
as shown in Fig. 2. This will prevent the nozzle, electrode, and swirl baffle from
falling free when the shield is removed.
The gas flow check valve is part of the safety interlock and is permanently
assembled in the torch head. The head must be replaced if this valve
malfunctions. The light spring force used to close the ball check can be felt by
pushing on the electrode when assembling the front end components.
2. Periodically check the heat shield, electrode, nozzle, and swirl baffle. Replace
if worn or damaged.
3. Do not continue to use if the electrode end erodes to a length shorter than 16mm
[5/8 in.] as shown in Fig. 3.
4. Apply a small amount of lubricant P/N 0558000443 (17672), supplied in spare
parts kit, to the heat shield as shows in Fig. 3 or to the o-ring. Check o-ring for
damage whenever the shield is removed. Replace if necessary. O-ring P/N
0558000514 (950790) is also supplied in spare parts kit.
Seat
Lubricant can be applied to O-ring or Heat Shield
16mm (0.63")
Minimum
Fig. 3 - O-ring and Electrode Maintenance
67
MAINTENANCE
"XT" Electrode
Replace electrode when end
wears to 16mm (0.63") long.