ESAB PT-38 Manuel D'instruction page 106

SECTION 5
3. Pull the insulating sleeves back to expose the hose and pilot arc connections. Disconnect the hose fit-
tings from the torch head assembly by using a 7/16" and 3/8" wrench to prevent twisting copper tube.
Use wrenches here to disconnect hose connection.
4. Disconnect the pilot arc wire from the torch head assembly by unattaching the lead at the knife splice
connection.
5. Carefully disconnect the power cable by using a wrench to secure the piston and a 1/16" allen wrench
to loosen the set-screw and pull the power cable free from the torch piston.
6. Remove piston. Wipe body cylinder inner walls and o-ring seated at the bottom of the cylinder.
7. To reinstall, start set-screw in piston two to three threads. Install and grease piston o-ring. Place elec-
trode contact spring and cap (with key toward front of torch) on piston. Pressing downward on cap
and compressing spring, insert power cable ferrule. Make sure cable ferrule end is flush with surface
of piston to ensure free movement. Tighten set-screw firmly. Verify power cable ferrule is secure.
Carefully insert piston into torch body noting orientation of cap key toward front of body.
If the torch cable is being replaced, perform steps 3 and 4.
If only the piston is being replaced, skip to step 5.
Power Cable
Insulating Sleeves
Never clamp piston here!
Note:
Note:
Insert 1/16" allen wrench here to
loosen setscrew and remove power
cable.
Pilot Arc knife connection
Place wrench here to prevent piston from
turning during assembly/disassembly of
power cable.
106
MAINTENANCE
Note that ferrule should be flush with pis-
ton to ensure no interference with handle.
Note placement of electrode contact
spring and orientation of piston cap key.