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Airco 300 AC/DC Heliwelder IV power issues:
Hello,
I just came across this website and noticed you replied to another gentlemen regarding his welder. I have an old Airco 300 Heliwelder IV machine with a similar problem of no current control. I have just ordered a new reactor pwb for replacement and apprehensive to power the unit up. I need to know and to verify what color wires go to the 25 Amp bridge rectifier mounted directly above the reactor board. There are four wires; colors are blue, white, red & black. I know the white & blue go to the AC terminals. Would you know the correct wiring for the red & black leads? I have a picture of the wires in question. I would greatly appreciate your comment or any suggestions. What are the possibilities that you may still have a schematic on that particular circuit pwb or the machine?
Thank you much for your time.
Quote:
Originally Posted by
tadream
Still working on this? I've had a bad experience with repairing one of these several years ago (although I finally got it). There's also one of these machines sitting in my parents' garage, and the board from it is on the shelf in my garage. (don't get excited, the board is bad). Anyway, I may be able to help with the connections. SOMEWHERE I have a book on them with a machine schematics, and a partial schematic of the board that I drew myself, although God only knows if I can even find that book. The one that I had trouble with, I struggled with a problem similar to yours for DAYS, and it ended up being a simple 5-minute fix. This has been between 12 & 15 years ago, but I still remember it pretty well. I even labeled that section of the book: "Heliwelder IV, Machine from Hell". :)
In need of manual & Remote switch for Airco 150
Quote:
Originally Posted by
thedoctor
If you are still working on this, I have hundreds of welder service manuals, including one for your machine. I just found this forum or I would have mentioned it sooner. Let me know if you need a copy.
thedoctor
I have an Airco 150 Amp AC/D? MSM Heliwelder - Stock # 1341-0245, Serial H11051145 that I am looking for manuals and the remote HF Control switch. If you have thses items or know where I can receive them, I would greatly appreciate any help you might be able to give me. Thank you in advance, Drew.
Manuals For Airco Welders
Here is a link to a few welder manuals for Airco Welding Machinery.
http://www.industrialmanuals.com/airco-m-117.php
Here is a link to many welder Operations manuals, Parts List, Maintenance Manual, Schematics
http://www.industrialmanuals.com/welders-c-68.php