Tweco 400 Ultra-Cut(May 2014) - Manual (Page 123)

ULTRA-CUT 100 XT/200 XT/300 XT/400 XT
Manual 0-5302 TORCH INFORMATION 7-3
7.03 Parts Wear
Replace the Gas Distributor if it is charred or cracked.
Replace the Gas Distributor if the flange is damaged in any way.
Replace the tip and/or electrode if they are worn.
Good Electrode Worn Electrode Good Tip Worn Tip
Art # A-04745_AB