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Bush Hog HD-12 repower


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#1 48willys OFFLINE  

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Posted March 20, 2015 - 08:54 AM

I decided to go ahead with a diesel repower for the Bush Hog. I went with a Kubota d1105-e from an old Toro Reel Master, from what I find on the internet it’s about a 25hp engine so I should never run out of power. The rear end that was in the tractor is shot; it always acted like it wanted to lockup under load. So I'm going with a cast iron unit from a Cub Cadet 149 with the ported pump so I can keep the hydro lift. I still need to reverse it, and so while I got it apart it will get the fine spline axles, maybe later after some testing I might look for the guts from a super to go in it, but for now I think it should be ok. Still got a lot to get done but it is looking like everything is going to fit nicely. I was going to use the tranny cooler in the radiator but I found out from one of the cub guys that the lift circuit on the pump is also the charge pressure so it runs like 800 psi, so I guess I’ll need to come up with an oil cooler that can handle the pressure or come up with a way to circulate the fluid at a lower pressure.

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#2 olcowhand OFFLINE  

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Posted March 20, 2015 - 11:30 AM

Looking good!  On the cooler, just route the RETURN line off the hydraulics through the radiator.  There won't be pressure on the return.


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#3 48willys OFFLINE  

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Posted March 20, 2015 - 02:22 PM

Thanks! I got a set of rims built too, just took a old set of suburban rims and moved the centers out like the super cubs have. Now I can use tubeless tires, two days and they are still holding air so my welds must have been good :rocker2:

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Edited by 48willys, March 20, 2015 - 02:22 PM.

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#4 CRFarnsworth OFFLINE  

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Posted March 20, 2015 - 05:22 PM

:thumbs: Cool.   Thanks for the pics.   Rick



#5 HANKG OFFLINE  

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Posted March 20, 2015 - 07:03 PM

Wow that is quite a project looks like everything is going well . That is some combination VERY COOL



#6 sacsr OFFLINE  

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Posted March 20, 2015 - 08:28 PM

Looking good! It's going to be a beast for sure!

#7 48willys OFFLINE  

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Posted March 24, 2015 - 07:42 AM

Anyone know what series these u-joints from the bush hog are? Trying to get new cross and bearing kits for them and I'm haveing trouble. It looks like they might be 1000 series but the new spider fits really tight and its hard to get the clips in, it only worked in one yoke. Guess I ordered the wrong yoke for the hydro too, got some idea that they were just a series 6 but went to put the bearing in and it was to big :wallbanging: .



#8 48willys OFFLINE  

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Posted March 24, 2015 - 12:28 PM

Got it worked out. I went by the shop and best we can tell its a 0675 series u-joint, so he ordered me the right yoke and I picked up a new cross and bearing kit at napa (1501 is the part number) and put the engine side joint together,this one seems to fit good.


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#9 Texas Deere and Horse OFFLINE  

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Posted March 24, 2015 - 09:39 PM

Don't know how I missed this thread, but WOW, what a great build. That HD-12 is going to be a real horse, should do anything you can ask of her.

 

I also edited the title so everyone would know that you are working on a Bush Hog, hope you don't mind.



#10 48willys OFFLINE  

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Posted March 30, 2015 - 06:46 AM

Got a little done this weekend. Drilled and modified the new yoke to work on the cub pump and got the u joints back together. Hoping my engine mounts come in this week so I can cut the drive shaft to length and get the drive line mocked up. Also got the steering wheel off, I was starting to think it was never going to come off in one piece.


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#11 KennyP ONLINE  

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Posted March 30, 2015 - 07:21 AM

I'm lurking here, watching to see how this comes out! That's gonna be one tough tractor!



#12 48willys OFFLINE  

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Posted April 13, 2015 - 10:38 AM

Got a lot done this weekend. Put the engine in and got everything where it needed to be, then pulled it all apart and welded everything together. Flipped the gears and charge pump in the rear and added the fine spline axles. Steamed everything off and touched up the paint on the inside of the frame and painted the rear-end. Cut the drive shaft to length and got it put in .

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Edited by 48willys, April 13, 2015 - 10:42 AM.

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#13 KennyP ONLINE  

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Posted April 13, 2015 - 10:43 AM

Looks good!



#14 olcowhand OFFLINE  

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Posted April 13, 2015 - 10:45 AM

Looking very nice & slick!  Hmm.....SW Virginny huh....so you might make Fall Plow day here in Ky????


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Posted April 14, 2015 - 03:18 AM

Who makes that hydro unit for the cub rear? You should have plenty of grunt there!!Very nice job So far. With power like that, I would be installing a second oil cooler for the hydro, it will run a lot cooler,and take some heat load off the radiator.
Nice build!!!
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