ESAB PT-37 Manuel D'instruction page 438

SECTION 5
CAUTION
3. Remove the nozzle by tilting retaining cup upside down and pushing nozzle out. Inspect nozzle for
wear. The nozzle orifice should be round at both the entrance and the exit. If the nozzle orifice is
worn in an oval shape or shows other signs of damage at either end, it should be replaced. The inside
of the nozzle may have light gray deposits from the electrode. These may be removed with steel wool
but care must be taken to remove all traces of the steel wool afterward.
4. If the electrode has a pit which is more than .06" (1.5mm) deep at its center, it must be replaced. This
is done by unscrewing the electrode in a counter-clockwise direction from the piston. If the electrode
is used beyond this recommended wear limit, damage to the torch and power source may occur.
Nozzle life is also greatly reduced when using the electrode below the recommended limit.
Gas baffle and retaining/shield cup need to be replaced only if cracked or significant signs of wear are
Gas Baffle (30-70A)
Shield
REPLACE ELECTRODE BEFORE WEAR BECOMES DEEPER ThAN .060"
INCh (1.5 MM).
noticeable. Monthly replacement is generally a good practice.
Torch Body
Assembly
Electrode/Torch
Body Seat
Piston
Gas Baffle (90/100A)
Electrode
Nozzle
Retaining Cup
w/ Threads
Note:
WORN
NEW
438
MAINTENANCE