kubota 1703 application?

[northernss454]

Hi I am new to forum and have a couple questions for you Kubota engine swapping pros. I recently purchased a vermear cx234 mini excavator with a blown engine.( rod through the block) Its has a Kubota 1703 3 cyclinder engine. Doing some research I see these were used as both stationary engines and variable engines.
These are a bit harder to find than I thought, I have found a couple remans but have had bad experience with a couple remans over the years, I think I would rather a used one or crate but Kubota is having a hard time finding me a crate engine.
Now finally to my question, I have found a good used one out of a tractor, would this engine work for me? Reading the serial number I see the family number is the same. I assume if the family number is the same but we know what assuming does.
If anyone could help me or direct me to a engine that would be great. Look forward to talking to anyone.
Thanks

 

[Eric McCarthy]

Vermeer has it as a Kubota D 1703-E Diesel, any identical Kubota engine to it will work.

 

[northernss454]

Okay where did you get that number would it be stamped on valve cover.Thanks for the reply

 

[Eric McCarthy]

I just went to Google and pulled up the specs for a Vermeer CX234

 

[lsmurphy]

http://www.dieselenginemotor.com/diesel/engine/images/Kubota D1703E G972 Diesel Engine/247

 

[northernss454]

I tried them they don't have this engine. Arg getting discouraging I found a couple engines but its hard to get info on the serial numbers on how they were built. I am just scared I will accidently buy a engine that was in a genset and it wont have enough power.
Any other ideas.? Thanks guys. who knows maybe soon u will see a Veremeer excavator for sale on this fourm. cheap lol

 

[Eric McCarthy]

I think you should be fine even if you find a engine from a generator or reefer. A D1703 is a D1703 no matter what it powers, they turn all kinds of different things at the flywheel. Should still have the same HP reguardless.

 

[northernss454]

Thanks Eric that's what I thought, Kubota dealer reassured this is not true. I don't know maybe they just want to sell me a new one. But I did find this

http://www.dieselenginemotor.com/kubota/super03/D1703

 

[Eric McCarthy]

I don't see why the horse power would vary. You'd think the deviced attached to the fly wheel would make the difference. Weather its a transmission, a generator or hydraulic pump.

 

[BadDog]

Different applications often have different fuel pump configurations and governors, sometimes more, particularly those designed to run most efficiently at exactly one speed (for instance, pumps and gensets). That results in some with torque curves that look more like an inverted V, while others (particularly vehicles of all sorts) have broader flatter curves across the expected/useful rpm range.

 

[northernss454]

Then could I switch all my fuel stuff around and what ever else that's external on block? Or am I taking chances.

Thanks

 

[BadDog]

Cam and other internal things can be different as well.

I would say that the best thing to do is further research to figure out exactly what, if any, differences exist so that you can address them correctly.

And for the record, I don't have any specific knowledge about your motor, so I can't say specifically what you may or may not be dealing with. My comments are just general relating to various applications, generally split between fixed vs mobile. Not long ago I was helping a friend put a 12V Cummins 6BT in a 72 Suburban and that got me researching a possible 4BT swap for my expedition K5. In that case there are many 4BTs as fixed placement engines on pumps and gensets, but it's not generally economical to retrofit those for automotive use. My concern that I was trying to raise is that you might be dealing with something along those lines. But yours is tractor vs excavator, not stationary vs mobile, so they may be identical, but I wouldn't want to invest too much time until I was pretty sure.

 

[northernss454]

I tried to get Kubota to descifer this number in Canada but no luck Maybe someone out there can help. Serial number of engine 04M0443. If someone could give me some info on that engines application I will buy them a big case of beer.......... Seriously I will
Thanks

Thanks Bad dog for the help

 

[Apogee]

If it were me, I'd find a good one and not worry about what it came out of. Swap the cam and fuel parts form your existing engine and run it.

If you really want to do it right, toss in new bearings, rings, a valve job, and have the pump and injectors rebuilt while you're at it. You will be many dollars ahead of buying a crate engine, and you should be good to go for a long, long time.

Only other tidbit I'd add is I'd check the part numbers of the pump, injectors and cam from your existing engine and the "new" engine. If they're the same, then you don't need to swap them. If they're different, then swap away...

Just my $.02,

Steve