I - Upkeep And Maintenance - Lincoln Electric NERTAJET CPM 250 Safety Instruction For Use And Maintenance

I - UPKEEP AND MAINTENANCE

NERTAJET CPM plasma cutting torches are the seat of various phenomena which
create the plasma arc. To do this, they are supplied with :
- electric energy,
- plasmagene gas,
- cooling water,
through means of a bundle of pipes and wires.
a) COMMENTS :
 The normal wear of the nozzle and electrode limit the service life of these parts,
making their replacement necessary.
 An error in assembly or leaving out a part can be detrimental to the service life of
the torch.
 During disassembly or reassembly of parts equipping the torch, handle them
carefully in order to avoid breaking, scratching or marking them.
To carry out this work, use the tools in the CPM torch-kit, reference W000325114.
 Always use original parts.
Before any servicing operation, shut down the cutting installation
b) BUNDLE :
The bundle must be installed so that it is safe from mechanical, chemical and heat
damage.
Be careful of the condition of the bundle grouping sheath.
If it is defective, check the condition of the various conduits which make up the bundle.
Also check the wire leading to the part (ground wire).
The upkeep and repair work on the envelopes, conduits and isolating sheaths must never
be carried out haphazardly.
Regularly check the tightening of all the connections and make sure that the electrical
connections do not heat up.
c) MOUNTING THE WATER VORTEX :
In order to avoid slag build-up around the guide and feed pipe which may cause short-
circuits with the torch support flange, cleaning should be performed regularly.
d) LUBRICATION :
 Always use a small amount of silicone grease, reference W000382836 on the seals to
facilitate the fitting and disassembly of the parts.
Caution, too much grease may block up the openings and foul the equipment.
I-44
8695 9064 / L
CPM 250-300-720-900