Tweco 38 CutMaster - Manual (Page 40)

SERVICE 5-8 Manual 0-2964
3. Gas pressure too high or too low
a. Adjust to proper pressure.
4. Upper O - ring on torch head is in wrong position
a. Remove shield cup from torch; check position of upper O - ring. Correct if necessary.
Lower O-Ring
Upper O-Ring
in Correct Groove
Upper Groove
with Vent Holes
Must Remain Open
Threads
Art # A-03640
5. Faulty components in unit
a. Return for repair or have qualified technician repair per Service Manual.
G. No cutting output; Torch activated; AC indicator ON; Gas flows; Fan operates
1. Torch not properly connected to power supply
a. Check that torch leads are properly connected to power supply.
2. Work cable not connected to work piece, or connection is poor
a. Make sure that work cable has a proper connection to a clean, dry area of the workpiece.
3. Shield cup not properly installed on torch
a. Open main disconnect switch. Check that shield cup is fully seated against torch head. Set ON / OFF switch
to OFF, check shield cup, close main disconnect switch, turn power supply ON, and try cutting.
4. Faulty components in unit
a. Return for repair or have qualified technician repair per Service Manual.
5. Faulty Torch
a. Return for repair or have qualified technician repair.
H. Low cutting output
1. Incorrect setting of CURRENT (A) control
a. Check and adjust to proper setting.
2. Faulty components in unit
a. Return for repair or have qualified technician repair.