Bobcat 225 Adjusting Idle/Hz/RPM and Voltage

[Rscott]

I’ve never fooled with the rheostat. Previous owner may have. I reversed the wires and now it’s like 127 volts ac on 10 and 90ish on 1.

[blue_tech]

It sounds like the rheostat is wired backwards. You should see about 90 VAC at the 120v recept with the fine control at 1 and about 125 VAC with the rheostat set at 10. Either way, the frequency at run speed should be about 62 hz and about 43 Hz at idle.

[1997CST]

Has someone fooled with the rheostat? Have you welded with it to see if the heat increases when you turn the rheostat?

[Rscott]

OK, update!!! It was on 10 when I checked it yesterday. I just checked it again to make sure, dialed to 10 it reads 90-95 volts. For giggles I dialed the fine amp voltage back and the voltage began to increase. When I got to 1, it reads 127 VAC. !!??

[Kpack]

Good call on the fine control on 10 . Put it there and set the hz.

[smawgmaw]

Pretty sure the fine amp control dial needs to be cranked up to get the auxiliary power hertz up?

I think so as well. I believe it needs to set at max setting to get full auxiliary output from the recepticles.

[snoeproe]

Pretty sure the fine amp control dial needs to be cranked up to get the auxiliary power hertz up?

[Rscott]

I set the low side to 43 and the high idle to 62.5. I do not have an RPM gauge.

[Kpack]

What did you set the hz at ? Do you know what rpm you’re running at ?
You may need to clean the slip rings.

[Rscott]

Bobcat 225. I found here in the forum how to adjust low and high idle using a Hz meter. I did that and when I check AC voltage at the receptacle, I am only getting 90vac. Do I adjust the RPM higher or look for a problem somewhere else?