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Diesel Sears SS15


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#1 eodcoduto OFFLINE  

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Posted January 24, 2017 - 09:09 PM

I just finished up putting a turbo Yanmar L100AE in my Sears SS15 when I fell into a dirt cheap Kubota D662 from a greens mower.  Of course now I want to swap it in!  I have put up an add looking for a hydro trans axle but so far I haven't had any luck, and being in the high desert of California shipping is cost prohibitive for anything off of eBay.  So now I am looking for a right angle gearbox so I can come off of the flywheel and keep the Sears Hi/Low transaxle.  Does anyone have advice on a 90 degree gearbox that will hold up to 20hp at 3600 rpm?  The Hub City boxes are all over but they are only good for 1750rpm.  I have looked at some mower deck boxes but its a crap shoot since I don't know which way they turn and if they will hold up mounted on their sides.  Any advice is appreciated. 

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#2 miller_time ONLINE  

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Posted January 24, 2017 - 09:20 PM

I have one that should work. It out of a kubota tg1860. It is the 90 degree box the runs the rearend. The tg1860 comes with a d722 engine that drives directly into the gearbox then turns 90 to run the rearend by belt.

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#3 miller_time ONLINE  

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Posted January 24, 2017 - 09:27 PM

Here is a drawing of the gearcase. 450 us the driveshaft that bolts directly to the d722 flywheel. The box appears to have 2 outputs. Not sure if thats a problem or not.
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#4 eodcoduto OFFLINE  

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Posted January 24, 2017 - 09:27 PM

Which directions to the shafts turn?  I plan on mounting the engine with the flywheel to the rear, which should turn CCW, and the sears side pulley is also CCW.  Do you have any pictures and what do you want for it?



#5 miller_time ONLINE  

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Posted January 24, 2017 - 09:31 PM

I will check on rotation tomorrow and try to get some pics. It is still in the machine. It has a bad rearend and i bought it for the engine. I will also try to get some measurements if it will work we will figure out a price.

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#6 miller_time ONLINE  

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Posted January 24, 2017 - 09:38 PM

You could also turn the engine around and drive the gearbox with the crank pulley to change the rotation. I stuck a d722 in my john deere 420 and had to run the hydro that way for the correct rotation. The flywheel is right behind the grill and runs the front pto.

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#7 Cvans OFFLINE  

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Posted January 24, 2017 - 09:39 PM

This is probably not what you want to hear but,,,,,,,,, why not leave the SS15 the way it is and find another tractor for the new engine? 

Are Garden tractors hard to find in your area?


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#8 miller_time ONLINE  

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Posted January 24, 2017 - 09:42 PM

The tg1860 actually sits that way also.0bc116bc6907cb1161fe4f8a5ee96b55.jpg

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#9 eodcoduto OFFLINE  

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Posted January 24, 2017 - 09:46 PM

This is probably not what you want to hear but,,,,,,,,, why not leave the SS15 the way it is and find another tractor for the new engine? 

Are Garden tractors hard to find in your area?

You are correct, but I will be in 29 Palms, Ca for the next 3 years so getting another tractor is just about out of the question.  The few that are within 4 hours driving are way above my price range ($1500+).


Edited by eodcoduto, January 24, 2017 - 09:47 PM.

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#10 nitro OFFLINE  

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Posted January 24, 2017 - 09:52 PM

At first glance, that engine looks like a roots supercharger.



#11 skyrydr2 OFFLINE  

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Posted January 25, 2017 - 05:02 AM

I say leave the sears 15 as is and save the Kubota for a later date. You will have to stretch that Sears to get it to work. And that diesel will work much better powering a hydro.
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#12 TAHOE OFFLINE  

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Posted January 25, 2017 - 07:55 AM

If you are really into the Kubota swap, check out "pacificdrummer" on youtube, he swapped a diesel and a hydro rear in a GT19.9.

he had to do a lot of fab work including stretching frame 6-8"

Since you are on MTF also, do a member search for "Hugh-16/6" where he posted a lot of pics of build


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#13 eodcoduto OFFLINE  

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Posted January 25, 2017 - 08:44 AM

If you are really into the Kubota swap, check out "pacificdrummer" on youtube, he swapped a diesel and a hydro rear in a GT19.9.

he had to do a lot of fab work including stretching frame 6-8"

Since you are on MTF also, do a member search for "Hugh-16/6" where he posted a lot of pics of build

I watched that build and he did a great job, unfortunately the hydro rear hasn't been available in my area so I think the gearbox might be a way to go.  


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#14 miller_time ONLINE  

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Posted January 25, 2017 - 06:23 PM

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#15 miller_time ONLINE  

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Posted January 25, 2017 - 06:24 PM

7e6352a349f71276dffeea6918ca1f2e.jpgdfa70fee4fac728322e8bb32f56d3c6f.jpg293c111d1ba6e06817581eb44c604971.jpg

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