Micro CoGen.

I been so busy with the Truck engine.

The details of the build is almost complete. Than it's gathering the rest of the parts to build it.

 I need to start checking in more often.  Yes you do..

That is a great generator there.. Like the belt pulleys. Next gen builds some great gen sets.

Would like to find a carrier reefer parts list using the Z482 or D722.. Any chance you have one kicking around Henry?

One more pic.. Cigarette not part of build..  Quit 7 years ago.. It fell out of a box of parts and i did not see it when I took the pic and posted it here.. Sorry bout that.

How thick is your flywheel that you can let a 5or6 rib belt ride on it? My kubota D722 has a flywheel that is i inch thick including the ring gear. So I am left with about 5/8'' left for belt width. Probably not going to for me.. I bought a stubshaft for a D722 from a marine generator manufacturer. 1.125 shaft 2.875 long with a 5 bolt flange that fits into the flywheel.. They told me side loading is not an issue with these engines being dual belt driven. Keep tension reasonable.
Some pics of just trying to design a simple frame setup. Mocking it up for now. Probably more than a few changes needed.

A double AX belt setup would work fine.

A k belt (serpentine belt) requires more tension than a double AX belt setup.

There are stubshafts available for the Z482.

When installing a pulley on the stubshaft, get the pulley a close to the flywheel as possible.

This is my first post here.  Thanks for having me.  I'm a lifelong mechanic, tinkerer, and fabricator but I'm new to small industrial engines. 

I just picked up a nice '95 Z482-E engine out of a semi truck APU.  I'm planning to use it to build a belt driven 5kw generator.  I know the ideal plan would be to use a bearing supported stub shaft but my budget for this project doesn't really allow that, and I don't have the time available to fabricate one from scratch. 

Looking around at various parts diagrams it looks like there are a number of Kubota tractors and other small equipment with the Z482 that drives the main power take off from a pulley attached to the flywheel.  Same with other applications like Carrier reefers. From what I can tell most of these use simple V-belts. This tells me that these engines are designed to tolerate at least some side load on the crank.  I haven't been able to find any info, though. 

I'm thinking that I'd like to attach a ribbed belt pulley directly to the flywheel and use that to spin the generator.  I understand that ribbed belts don't need a great deal of tension to work properly so this seems to me like it might work.  I'd rather not sacrifice longevity of the motor. 

What do you guys think?

Here is a design that can be used with either a generator or alternator.

https://hardydiesel.com/product/kubota-5-5-kw-micro-diesel-generator/

If you're going to build a generator using a 4 pole head, and you want to use a Kubota engine, I would highly recommend D1005 BG.

If you can find  a used D905 BG engine, it will also work. This model was discontinued years ago. "Do not mistake a D902 for one it's a lighter duty engine.

If you can find a used D905 BG or D1005 BG, it comes with a much larger and heavier mass SAE flywheel and shorter SAE housing than the industrial engines. These are needed for making an 1800 rpm generator. The smaller diameter and lighter flywheel will not work. There is a super thick smaller diameter SAE flywheel also available that is used with a much thicker SAE housing. Some have used them but noticed some flickering of lights when engine is fully loaded because of less rotating inertia.

I have built and documented a complete build using a D1005. Was a great generator. But it used more fuel than I expected because I had to run a constant load bank to keep the engine loaded properly so it would not wet stack and coke up.

Try to build a generator that is able to handle your minimal critical power requirements with the engine loaded no less than 50 %. Preferably 75%.

If you need to produce more power at a certain time of the year, consider a second generator to handle the heavier loads.



Below is one of the surviving pictures right after the forum crashed a while back. I built this Kubota D1005 powered generator over ten years ago. I no longer have it. At times I sure miss it. It was a great project.:

You cannot view this attachment.