Tweco 39 CutMaster - Manual (Page 53)

cutmaster 39
Manual 0-4975 5-9 SERVICE
5. Torch consumables worn
a. Check torch shield cup, tip, starter element,
and electrode; replace as needed.
6. Faulty components in unit
a. Return for repair or have qualified technician
repair per Service Manual.
N. No gas flow; AC indicator ON; Fan oper-
ates
1. Gas not connected or pressure too low
a. Check gas connections. Adjust gas pressure
to proper setting.
2. Shield Cup not properly installed.
a. Check to see that Shield Cup is properly in-
stalled.
3. Faulty components in unit
a. Return for repair or have qualified technician
repair.
O. Torch cuts but not adequately
1. Current (A) control set too low
a. Increase current setting.
2. Torch is being moved too fast across workpiece
a. Reduce cutting speed.
3. Excessive oil or moisture in torch
a. Hold torch 1/8 inch (3 mm) from clean surface
while purging and observe oil or moisture
buildup (do not activate torch). If there are
contaminants in the gas, additional filtering
may be needed.