MAINTENANCE
PT-19XL PLASMARC CUTTING TORCH
SECTION 4
the 7/64-inch hex Allen wrench (supplied with
the torch) at the contact ring assembly (P/N
20395). Remove contact ring assembly from
the insulator body by removing one socket
head screw with a 7/64-inch hex Allen wrench.
E. Reassemble in reverse order. Align insulator
body with locating pin (P/N 996242) and push
in.
4.5 REPLACING CABLES AND HOSE
A. To disconnect the power cable, water return
hose, and gas hose at the back end of the
torch, unscrew the fiberglass sleeve (P/N
19483) from the stainless steel body.
B. The pilot arc cable is attached to connector
(P/N 20408) under insulator (P/N 20409). Re-
move tape behind the insulator so that it can be
slid up the pilot arc cable exposing the con-
nector. Loosen set screws with 7/64-inch hex
Allen wrench to remove cable from connector.
A 12-inch long 12 gauge bare copper wire is
connected to the contact ring assembly and to
the connector.
C. Straighten out the services lines and make
sure the torch sleeve is straight when screwing
it back onto the torch body. Threads are rather
fine and easy to cross-thread. Do not force the
sleeve. A little bit of silicone grease will help.
D. Secure the sleeving (P/N 995826) on the 50 ft
torch (P/N 20390) with tape or ty-wrap under
the torch sleeve to protect the service lines
from arc radiation. When the torch is ready to
operate, make sure the service lines are well
out of the way.
D. Check O-ring (P/N 86W99) inside electrode
holder periodically. If nicked, it should be
replaced exercising care to avoid scratching
the O-ring groove. Lubricate new O-ring lightly
with silicone grease before installing it into the
electrode holder.
E. Replace the gas swirl baffle if it is cracked or if
the front edge (nozzle seating surface) is
chipped.
F. When reassembling, slip the gas swirl baffle
over the electrode/electrode holder assembly.
Then screw the electrode assembly into the
torch using 7/16-inch nut driver. Tighten firmly
but do NOT overtighten.
4.4 REPLACING INSULATOR ASSEMBLY
The insulator assembly (P/N 20434) should be re-
moved periodically and inspected for cracking and for
possible replacement of six O-rings. To remove the
insulator body, do the following:
A. Remove heat shield, nozzle retaining cup,
nozzle, electrode, electrode holder, and gas
swirl baffle as described above.
B. Pull the insulator body straight out.
NOTE
The pilot arc cable will be attached, so allow plenty of
slack on the cable.
C. Lubricate the O-rings sparingly with silicone
grease. If necessary, replace O-rings.
D. If replacing the insulator body, disconnect the
pilot arc cable by loosening the setscrew with
2
inches
4 1/4
inches
3
inches
SLEEVING
NOTE: Braid does not go over Gas or (P/N - 72020003) Hose.
Securely tape around hose bundle 2" wide.
Slide braid down and tape over 4-1/4".
BOOT
NOTE: Do Not Tape over the end of the P.A. cable conduit.
Figure 4-2. PT-19XL Cable and Hose Assembly,(ESP-1000 Style Cable Bundle)
9
BACK OF SLEEVE
