I picked up an old Miller 35S mig/spot welder. It's in good condition and seems to weld ok as far as I can get. It came with a bottle of gas but I can not identify it. It is like greenish/turqoise in color but unlabeled . Is there a way to ID it in the stampings? Secondly, the weld weld lays out decent but I don't think it's getting all the gas or maybe any gas. The regulator was wrong so I changed that. I want to know the proper way to test the solenoid for the gas as I can not hear the gas. The weld isn't neccessarily porous but it is dark gray versus the shiny/light gray u typically get with c25 mig. Is it possible that this is just co2 gas? Usually I can hear the gas and I can't now. I used co2 all the time with 777 wire but never with solid wire. Thanks if u can help. Dave
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02-22-2013, 07:48 PM #1turbo38t Guest
Cruizer, need some old school Miller help...
02-22-2013, 08:47 PM #2
Your going to get that with straight Argon, and thats likely what the gas in the bottle is.
02-22-2013, 10:03 PM #3Senior Member
- Join Date
- Feb 2007
- asheville n.c.
I went and picked up my tb 301 from shop its been sitting in for 22 months. The shop man did not think it was worth the money to fix it. He said a new board is about a grand. Anyway he did something to it and it worked for a day. Then it quit. It fires up and i have generator power but no weld output. If you can help i appreciate it
02-23-2013, 10:15 AM #4turbo38t Guest
02-23-2013, 10:28 AM #5
Not difficult to tell a CO2 bottle from Argon. Argon has a center screw on fitting, CO2 has a plastic washer and screws on over the bottle threads.
Straight Argon will make a very dark weld. May even be a stainless mix, We don't know...Never the less, best to verify the gas
02-23-2013, 10:34 AM #6
02-23-2013, 05:05 PM #7turbo38t Guest