Lincoln Electric IM944 POWERTORCH PLASMA 20 - Manual (Page 16)

D-1 MAINTENANCE D-1
POWERTORCH™ PLASMA 20
PERIODIC MAINTENANCE
Change consumables as required.
Torch:
• Periodically according to use, or if experiencing
cutting faults, inspect consumable parts associat-
ed with the plasma arc.
Shield Cup:
• Unscrew manually from the head of the torch.
Clean thoroughly and replace if damaged (burns,
distortions or cracks).
Nozzle:
• Check wear of plasma arc thru-hole and inner &
outer surfaces. If thru-hole is widened compared
to itʼs original diameter, replace nozzle. If sur-
faces are particularly oxidized, clean them with
extra fine sand paper.
Air Distribution Ring:
• Verify there are no burns or cracks and that air-
flow holes are not obstructed. If damaged,
replace immediately.
Electrode:
• Replace electrode when crater on emitting sur-
face is about .08”(2mm).
• Before making any adjustments to the torch, let it
cool the entire post-flow time.
• Except for particular cases, it is advised to replace
electrode and nozzle AT THE SAME TIME.
• Insure correct assembly order of torch parts.
• Be careful that gas distributor ring is assembled
properly.
• Reassemble shield cup screwing it on manually
(hand tighten)
• Never assemble shield cup without having included
gas distributor ring and nozzle beforehand.
• Timely and appropriate maintenance on torch parts
is essential for safety and proper functionality of the
cutting system.
ELECTRIC SHOCK can kill.
• Have a qualified person service this
equipment.
• Turn off machine and disconnect
input power by removing the plug
from the receptacle before working
on equipment.
• Do not touch electrically hot parts.
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ROUTINE MAINTENANCE
1. Keep the cutting or gouging area and the area
around the machine clean and free of combustible
materials. No debris should be allowed to collect
which could obstruct air flow to the machine.
2. Every 3-4 months or so, the machine should be
cleaned with a low pressure airstream. Keeping the
machine clean will result in cooler operation and
higher reliability. Be sure to clean these areas:
- Printed circuit boards and heat sinks
- Power switch
• When using a low pressure airstream, wear
appropriate eye protection. Only use dry com-
pressed air for cleaning. Do not point the jet of
air at the electronic circuits.
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3. Examine the sheet metal case for dents or break-
age. Repair the case as required. Keep the case in
good condition to insure that high voltage parts are
protected and correct spacings are maintained. All
external sheet metal screws must be in place to
insure case strength and electrical ground continu-
ity.
4. Inspect the cable periodically for any slits or punc-
ture marks in the cable jacket. Replace if neces-
sary. Check to make sure that nothing is crushing
the cable and blocking the flow of air through the
air tube inside. Also, check for kinks in the cable
periodically and relieve any so as not to restrict the
flow of air to the torch.
5. Inspect Torch Body and Handle, keep thoroughly
clean WITHOUT THE USE OF SOLVENTS. In
case of damage replace components for SAFETY
CONDITIONS. If repairs cannot be made on site
contact a local field service shop.
WARNING
ELECTRIC SHOCK CAN KILL.
• Turn off machine and disconnect
input power by removing the plug
from the receptacle before tighten-
ing, cleaning or replacing consum-
ables.
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WARNING
CAUTION
WARNING