ESAB PT-20AMX Manuel D'instruction page 278

SECTION 5
WARNING
!
Make sure that the power source
has been turned off and that the
power cable has been unplugged
at the wall receptacle before pro-
ceeding.
NOTE:
Part numbers in parenthesis ap-
ply to "CE" / European units only.
CAUTION
The torch requires good electrical
contact between the electrode
seat and electrode holder. If good
contact is not maintained, then
the resulting potential difference
causes internal arcing and pos-
sible torch damage.
5.3 Damage Caused by Loose Parts and Torch Overheating.
Arc tracking indicates loose parts. Make sure heat shield is tightened fully, at least
5mm (0.20") of rotation after electrode seat contacts electrode holder. Check tight-
ness again after a few minutes of use. Parts damaged by arcing will cause destruction
of torch. Parts damaged by arcing must be replaced.
Deformation at this edge indicates torch overheating. Check gas pressure, gas
flowrate and current setting. Deformation leads to loose parts and internal
arcing. Do not operate torch with a deformed insulator.
Electrode Insulator 21373 (4485837)
5.4 Consumables - Remove and Replace
1. Bring torch to a position where it is easily accessed by machine operator, in its
normal vertical position and at least 152.4mm (6.00") above the workpiece or the
edge of the water table.
2. Unscrew the heat shield and lower it away from the torch, allowing nozzle and
electrode assembly to remain with shield.
278
MAINTENANCE
Edge