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Repowering my HT23 w/FEL, is 16 hp diesel enough?

ht23 diesel repower kubota

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#1 Utah Smitty OFFLINE  

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Posted April 12, 2017 - 10:32 PM

Last summer I picked up an Onan RV Genset with a Kubota 3 cyl diesel (662?) in it. The genset runs at 1800 rpm and the engine puts out about 11hp at that rpm, but about 16 hp at 3600 rpm.

 

I bought back my Bolens HT23, only it now has a daylight block (tough old bird still went up on my trailer running on one cylinder...) 

 

I want to repower it with a diesel. I have a 21 hp 2 cyl Ruggerini air cooled diesel, but it smokes a little, and has the short European style taper on the output side of the crankshaft. I'm not real confident in being able to make a coupler for that taper to run the hydro.

 

The tractor has a FEL, and tiller, and I intend to put a 3 PH on it-- is the 16 hp Kubota enough engine for it???

 

All suggestions, recommendations are appreciated.

 

Smitty


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#2 boyscout862 ONLINE  

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Posted April 12, 2017 - 10:54 PM

Yes, but will it fit?



#3 LPBolens OFFLINE  

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Posted April 12, 2017 - 11:43 PM

As for the tapered output, the "Wisconsin" diesel in the HT20D also had a tapered output, so the driveshaft out of one of those would probably be a good place to start. There is a guy in NJ who takes out the diesel and installs a gas engine in HT20D's that have failed. He might have the proper yoke. (Now, if I could just remember his name.)


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#4 Utah Smitty OFFLINE  

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Posted April 12, 2017 - 11:46 PM

Yes, but will it fit?

I think so... it's really pretty compact.  And, it has the radiator, etc. already.  When I had the HT23 before, I loved the strength of the Kohler K582 but it sucked gas like crazy.

 

Here's a picture of the genset.

Onan DKC 4000 RH cropped.jpg


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#5 Utah Smitty OFFLINE  

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Posted April 12, 2017 - 11:47 PM

As for the tapered output, the "Wisconsin" diesel in the HT20D also had a tapered output, so the driveshaft out of one of those would probably be a good place to start. There is a guy in NJ who takes out the diesel and installs a gas engine in HT20D's that have failed. He might have the proper yoke. (Now, if I could just remember his name.)

Is the crank tapered?? I assumed it would have an adapter to attach to the flywheel, unless the armature of the genset acts as the flywheel.

 

Smitty



#6 Utah Smitty OFFLINE  

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Posted April 12, 2017 - 11:58 PM

Yes, but will it fit?

Oops!! Sorry for the double post.

 

Here's a picture of the genset.

Onan DKC 4000 RH cropped.jpg

 

I did some more research and it looks like it's a D650 Kubota, good for about 14hp max. I've heard that genset engines have a fixed fuel pump and can't be used on variable speed applications.  HOWEVER, I had a Z482 from a truck APU, and I was able to vary the speed by moving some set screws on the fuel pump lever.

 

If I can only get 14 hp, it's probably not big enough for what I want.

 

Smitty


Edited by Utah Smitty, April 13, 2017 - 12:02 AM.


#7 chieffan OFFLINE  

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Posted April 13, 2017 - 07:45 AM

Will 2 hp really make that much difference?  That diesel will have a ton more hang power than any gas.  That is why I like my Cub the 600 Kubota diesel.


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#8 Doug E. ONLINE  

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Posted April 13, 2017 - 09:04 AM

I'm very interested in what you come up with.  I have been pondering a diesel repower for a large frame also, but

have not found an engine that fit the criteria of HP, size, and cost.  I also picked up a Kubota Z482, but would like something

larger. 

 

What model is the Ruggerini that you have?

 

Regards,

 

 

Doug 


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#9 toppop52 OFFLINE  

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Posted April 13, 2017 - 09:14 AM

Most front end loader work only uses 8-10 h.p. The low end torque of test diesel will easily do the job.
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#10 Mark 149 J. ONLINE  

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Posted April 13, 2017 - 09:55 AM

Ditto
Torque is more important than horse power.
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#11 Cvans ONLINE  

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Posted April 13, 2017 - 10:10 AM

Hi Smitty. I installed a 16hp. Z620 into the Bolens Duratrac with a loader and it is plenty of horse power. I'm only running it at a max of 2800 rpm so it is running below 16hp. and I have never thought it was lacking. 

Does your Bolens have the 2sp. rear end like the Duratrac? If so you will have plenty of pushing power.

 

Ford and Bolens 019.JPG


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#12 LPBolens OFFLINE  

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Posted April 13, 2017 - 02:07 PM

Is the crank tapered?? I assumed it would have an adapter to attach to the flywheel, unless the armature of the genset acts as the flywheel.

 

Smitty

yes, the crank end is tapered for the yoke for the driveshaft connection. the flywheel is on the opposite end and does use a stub shaft for driving the PTO.


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#13 Utah Smitty OFFLINE  

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Posted April 13, 2017 - 04:24 PM

Hi Smitty. I installed a 16hp. Z620 into the Bolens Duratrac with a loader and it is plenty of horse power. I'm only running it at a max of 2800 rpm so it is running below 16hp. and I have never thought it was lacking. 
Does your Bolens have the 2sp. rear end like the Duratrac? If so you will have plenty of pushing power.
 
attachicon.gifFord and Bolens 019.JPG


Yes it has the two speed rear end. I figured the loader would be okay by wondered about the tiller.

Smitty

#14 Cvans ONLINE  

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Posted April 13, 2017 - 06:18 PM

How big is your tiller?  8hp. will run a 36" tiller fine. Remember that it will take about 2hp. to run the hydro on your tractor.


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#15 ClassicBolens OFFLINE  

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Posted April 13, 2017 - 09:33 PM

I believe it will be plenty enough for the HT23. Consider the early model Bolens Iseki G154-G174 tractors only had the 2 cylinder KE70 and KE75 Mitsubishi diesels, and the later tractors had the K3A & K3B 3 cylinder Mitsubishi which is very comparable to the Kubota D600-D650 engines. They were very powerful and capable machines that easily handled larger implements than the HT. What you may lose in HP numbers, you will gain in available torque.

 

I will be looking forward to see what you come up with.


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