Roughneck 2e no weld or power

[chase23]

I recently aquired a 1977 roughneck 2e. have the engine running fair right now, but all at once it quit putting out power. I cleaned the slip rings and brushes to no avail, and discovered I have no power at the brushes. If I jump a wire from the battery to the + brush I get about 20v at the outlet....

[mman21]

I have a roughneck 2e, I bought this not functional. the engine is running great now, it's producing electricity at the generator outlets. it's not welding though, when I touch the rod to the ground it just makes a tiny spark, anybody know what could be wrong. the fuse is good, and I've cleaned the...