Bobcat 250 low weld out put and no idle down

[Posty23]

So I replaced the rheostat with the factory replacement ordered from air gas. Brushes are good, also cleaned the armature a little bit ago. I will check F1 connection to fuse holder and make sure it’s clean....

[Posty23]

72volts with leads disconnected and running at high idle....

[Posty23]

What is OCV

[Posty23]

So Having some more issues with this unit, bobcat 250 carbureted Koehler 23motor. Serial number: Lh005511. Done a good amount of work on this unit and then it sat for a bit. It no longer wants to go into low idle, when applying battery volts to solenoid it pulls in and idle down. No voltage output from...

[Posty23]

Ok I will check that thanks....

[Posty23]

Solenoid is attached to the linkage....

[Posty23]

So I thought my troubles were over cause unit is running well. But now when I switch to low idle the darn thing doesn't idle down. It was working before but I would have to switch it back and forth to idle twice then it would idle down. Had a spare key switch and out it in, not the proble. Traced wiring...

[Posty23]

Strobe tachometer/ timing light....

[Posty23]

Yah it's pretty cool....

[Posty23]

Ok so I went through the wiring again at the diodes and traced all the paths per the wiring diagram. Found that I had actually crossed two wires in the diode blocks, now no more blown fuses. I cleaned the slip rings with coarse then fine grit. One of then was a lot rougher than the other. Once those...

[Posty23]

I'm getting 7 ohms across slip rings....

[Posty23]

My reading was putting my leads on the wire connection points that go to the brushes. I will take one on the rings with brushes lifted....

[Posty23]

I work on electric forklifts for a living, and there are a lot of the same type of components. I checked sr2 & sr3 with my meter in diode test mode, same with D4. All checked good. The unit was acting up before I replaced the rheostat, and had all the same symptoms. Don't know if it was blowing...

[Posty23]

Lh005511

[Posty23]

So I thought I had my welder problems all figured out, but when I went to strike an arch and run something off the act power I found both had about 2/3 of the normal output. While running with the settings maxed out I only get 92v at 120 plug and 140v at 250 plug. My welding power seems to be cut in...