My Miller aead is a lot older than yours, the Onan will not maintain welding RPM so I planned to replace it. Should I, are the parts available to repair it? If replacing is wise how to separate it from the welder. I have remove4d the base bolts and the 4 bolts that are inside the screened guard. But it doesn't budge, any help would be greatly appreciated.
You need to unbolt the flywheel from the rotor. Once that and the motor mounts and the bellhousing bolts are removed, it should come free. The Onans can be repaired if you can find the parts, but I opted to future-proof it with the Honda engine.
This is awesome. I knew this mod could be done. Thank u for posting this on RU-vid, Andrew. I'm sure this will help out a lot of people and also have requests to manufacture mod kits for others. I have a few Onan engine adapters if ur interested in manufacturing mod kits to upgrade engines for these older Miller welders.
Working great actually! I have to post a follow up video sometime. The diaphragm pump is a little noisy, don’t know if I’d use it if I did it again. But works like a champ
Andrew Spencer wouldn't use it again due to noise or other reasons? It's it on demand or constant flow? I'm thinking of using a Flojet diaphragm 50 psi pump
