SECTION 5
PCM-875A Plasmarc Cutting System
Maintenance
5-11
5.3.7 Removal and Replacement of the Torch Body
WARNING
!
Make sure that the power source has been
turned off and that the power cable has
been unplugged at the wall receptacle
before proceeding.
PT-20AMX Torch
1. Cut and remove the shrink wrap at the back
end of the torch handle. Unscrew the handle from
the torch body and slide it back onto the torch
cable assembly in order to expose the torch
connections.
2. Remove the electrical tape that secures the
short piece of vinyl tubing on the pilot arc cable.
Slide the tubing away from the torch and onto the
pilot arc cable to expose the pilot arc connector.
3. Use the 1/16" Allen Wrench supplied in the
spare parts kit to loosen the pilot arc connector set
screw closest to the torch body, being careful not
to totally remove the screw. Slip the torch’s pilot arc
lead out of the connector.
4. Unscrew the power cable fitting from the
torch’s power lead using a 7/16" open-end wrench
and remove the torch body.
5. Connect the pilot arc cable and the power
cable to the new torch body’s pilot arc lead and
power lead by reversing the steps taken to
disconnect them. Tighten the pilot arc connector
set screw fitting firmly but do not overtighten.
Torque the power fitting to 20 lb. in.
6. Slide the vinyl tubing forward to cover the pilot
arc connector and secure in place with electrical
tape.
7. Slide the handle forward and thread it firmly
onto the torch body.
8. Slide the new piece of shrink tube over the
torch handle and shrink in place over the handle’s
end and the cable sheath.
