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It turned out to be running in 2 cylinders. I needed a different fuel system and now it's got power. Do you know the amount of torque they have?

Hi, I recently swapped my IH cub loboy 154 with a kubota D640 3cyl diesel and it does not seem powerful enough. Seems like the governor isn't working. I have put a spring on the throttle lever to return it back to idle. Could that be the cause? It fires up and don't smoke but it just bogs down...

Yea, oversize injectors. I'm trying to figure out how much torque the 640 has from factory. I'm trying to figure that out so I know how it'll work in my tractor that I'm swapping it into. ;-)

I just bought a Kubota D-640 for $100. Only needed a head, so I put my D-722 head on, and it'll have the D-722 injectors. But how much torque do the D-640's have from factory and how much would it have with the D-722 injectors? (The head fits perfectly)

OK! I must've missed that part

Oh! Great! Thank you! That'll help us out a lot!!!!

Yea. Do the lines get lined up perfectly or are they a tooth off on every gear? Sorry for all the questions. I'm new to kubotas.

Just so we know what we need to get lined up when we put it together. Took pics of it. The crank lobe that got ground is worn out of round. Worn 19 thousandths. Hopefully it can get ground within spec

Thanks! We got it! Crank is worn.

I'm trying to get the crank out of the d722 but I cannot seem to get the timing marks lined up. How are the marks supposed to line up? We just want to get the marks lined up before we pull the crank

OK thank you

No it's not. Was told that it came out of like a bobcat walk behind skidsteer

Another question, what size is the std bore supposed to be and what it the std crank size? We just want to check the bore and crank and see how worn it is. If it's even worn

OK thanks!

I pulled the oil pan off and found out the rod cap was loose and the bearing got mangled. Needs rebuilt. The rings are shot. Any ideas on where I can get a good rebuild kit for it? The crank also has grooves in it from the bearing getting mangled.

OK. I will

It is!

OK. Thank you! My dad has rebuilt diesel engines before but never a kubota. It has ART pistons in it currently. Are those any good? Idk if they are factory or if it was rebuilt at some point