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General Description; Installation - Lincoln Electric MAGNUM PCT125 Operator's Manual

Lincoln electric welder user manual

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GENERAL DESCRIPTION

The Magnum PCT125/PCT125M plasma torches have
been designed for use on a Pro-Cut 125. All of the
torches are single gas, air-cooled. The torches are
supplied factory mounted to the Pro-Cut or can be
bought as individual units.
The hand-held torch is available only with a 70° head.
It is supplied with either a 25 ft (7.6m) or 50 ft (15.2m)
cable.
Two styles of mechanized torches are available. The
robotic torch features an 8" (203mm) long, 1-5/8"
(42.3mm) diameter barrel. The machine torch has a
12" (305mm) long, 1-3/8" (34.9mm) diameter barrel
with a 32 pitch gear rack. The 32 pitch gear rack can
be easily substituted with a 24 pitch gear rack which is
included with the machine torch.
torches are offered only with 50 ft (15.2m) cables.
Included with all mechanized torches is a 25 ft (7.6m)
arc starter switch assembly for triggering the Pro-Cut
without the use of an interface kit.
CNC or Robotic interface kits are available as a field
installed option for those customer desiring automated
plasma cutting. The kits provide remote triggering,
remote output control and give a signal once a cutting
arc has been established.
All of the plasma torches use the same consumables.
In order to operate, a torch must have an electrode,
swirl ring, nozzle and shield cup. There are three cut-
ting nozzles available to give optimum arc perfor-
mance at low, medium and high output. A gouging
nozzle is also available. Drag cutting can be done by
placing a wire standoff guide on to the shield cup or by
using a contact cutting attachment and contact cutting
insulator in place of the shield cup.
Operation from bottled compressed air or gas cylinders
is not recommended due to the large volume of gas
required for plasma cutting.

INSTALLATION

INSTALLATION
• Do not touch electrically hot parts.
• Do not operate with covers removed.
TOOLS REQUIRED:
5/16" nut driver
5/8" open end wrench
The mechanized
channel locks
FIGURE A.1 — Torch Connections.
A. Turn off power to the Pro-Cut at the disconnect
switch or fuse box. Do not proceed until the power
is definitely turned off.
B. Using a 5/16" nut driver, remove the sheet metal
screw which holds the access door shut on the right
side of the Pro-Cut. Open the door.
C. To remove a torch from the Pro-Cut, refer to Figure
A.1 and do the following:
1. Separate the two molex connectors from torch to
2. Using a 5/8" open end wrench, loosen and
PLASMA TORCH
WARNING
ELECTRIC SHOCK can kill.
• Only qualified personnel should per-
form this installation.
• Turn the input power OFF at the dis-
connect switch or fuse box before
working on this equipment.
the Pro-Cut.
unscrew the nut securing the gas tube to the
bulkhead union.
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Magnum pct125m