Some years ago a guy did just such an article and for the life of me, I can't get a google search to find it in any way I title it. None of the site searches have it and I dont remember who carried it. Anyone remember that article posting and have a link? THANKS
Belting a Kubota D1005 to Northern 10Kw gen head article
- Thread starter xtriggerman
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No, I think I read that. it uses a rubber coupling to join the units. The one I'm looking for uses a 2 different double pully coupling that makes up the RPM difference of 3600 rpm needed yet keeps the 1005 at near maximum power curve at 2200 RPM. The guy did a bang up job describing how he dialed it in with the needed size pullies. Just my luck, I got a great running Light Tower unit with burned out 6Kw gen head and a new Northern 10Kw head but no article.... 
Hang in there, lots of members here with gen knowledge should be along to voice their opinions eventually. It's early yet.
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Bee-positive, removed your post as it's a came back as an unacceptable link.
There choice, not mine.
There choice, not mine.
RPM is a fairly basic math issue - 3,600/2200=1.63636363...
A 1.636363... to 1 ratio, a 8" pulley on the genhead and a 13.0954" on the engine
Note: I edited this as I had the two reversed Dooh!!!
A 1.636363... to 1 ratio, a 8" pulley on the genhead and a 13.0954" on the engine
Note: I edited this as I had the two reversed Dooh!!!
Last edited:
Yup, thats just the kind of math Im not good at. Im not sure it was 2200 for the 1005 and looking at its stats, 2400 would be more like it since thats an out put of 21.08 HP. From what folks say, you need 2hp for every 1Kw generated. So probably like a 2450 RPM to 3600 ratio should handle the 10Kw out put surge of the gen head. So it looks like a 11.75" pulley #601810 on an 11.75" pulley #601806 will be real close to a rated 21hp by tweeking the pump to bring the gen up to a 120v 60 Hz reading on my Hz meter. The pulleys use H bushing inserts. the Gen shank uses a 1 1/16th bore keyed bushing #601824. Just those 3 items come to $215 from Surplus Center. Good out fit to deal with. I'll probably cut the shank off the toasted pancake head and figure out a bolt on bushing with the cut shank welded to stick out or something like that.
It will be years before AI has its own power sources. Up until then, our grid may well be sucked dry far more often than we are all used to. I'm grateful for any tips anyone has on this process.
It will be years before AI has its own power sources. Up until then, our grid may well be sucked dry far more often than we are all used to. I'm grateful for any tips anyone has on this process.
I'd say those fractional parts are very important.
How accurately can you control the tractor engine revs?
Once all bolted up and a pulley system as close as you can get it, fine tuning it done with engine RPM, setting it to be 60 Hz. Being your engine is from a lighting system, no doubt it already has an electronic throttle control to vary throttle to maintain the 60Hz, quite possibly to +/- 1 Hz.
If you must, select a ratio that does not require full/100% engine rpm. A few hundred under flat out is fine.
If you must, select a ratio that does not require full/100% engine rpm. A few hundred under flat out is fine.
Actually, now that you mention the 60Hz...
He wrote 2200 rpm, which I believe is the engine, and the 3600 are the revs required for a 60Hz two pole generator (60 Hz x 60 sec/min = 3600 rpm). This would mean that the 13" pulley has to go onto the engine and the 8" pulley onto the generator.
Careful if it is a four pole generator (which I have) which would only require half the engine revs.
Yup, my bad..... I'll edit my post to be correct. Big on the engine, small on the gen head.
Just from a quick look at it, I'd say this D1005 is mechanically speed controlled. Turning the revs up or down shouldn't be an issue if I'm right on that account. Now I dont know if it will need to be governed differently. I'll tackle that when I get to it. The old single cylinder 8Kw Diesel I'v been using for decades has no governor at all and still pumps out 60Hz under load without issue.
On my generator the Diesel engine and the generator are controlled. With a heavy load step the revs drop slightly briefly but the much faster generator control loop keeps the voltage steady.