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Bush Hog HD-12 repower


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#16 48willys ONLINE  

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Posted April 14, 2015 - 06:35 AM

Looks like it would be fun, its been a while since we made it to a plow day,have to see if we can work it out.


The hydro unit is made by Sundstrand, same as what came on the Bush Hog. But this unit is a veriable displacement pump directly powering a fixed displacement piston motor, unlike the original unit that has a gear motor. I sort of feel that the piston motor is a little better because if it gets some wear in it the fluid is less likely to bypass. It will be getting a oil cooler too, I think Olcowhand is right about the return I might get a gauge and check it first though, don't want to wreck my new radiator.


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#17 Cub123 OFFLINE  

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Posted April 14, 2015 - 09:11 AM

Looking good, I can't believe I let you pull that rear end out of my 149, It does look meaner in the bush hog though, LOL.

#18 skyrydr2 ONLINE  

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Posted April 14, 2015 - 11:06 AM

Dan is spot on, just make sure there is nothing that could cause any back preassure between the coolers and tank.

Edited by skyrydr2, April 14, 2015 - 11:08 AM.

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#19 48willys ONLINE  

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Posted April 21, 2015 - 10:35 AM

Making a little progress, turned the pump with a drill to find the pressure side and also checked the return side. I blew some air in the return and there is not any back pressure so it does dump right back to the reservoir, I did find that I need to add or fix a better vent though as the cub one isn’t working.

Also picked up my lines and fittings to plumb it, so I'm hoping when I get the radiator in I can fire it up and check the hydrostatic unit for proper operation and start on the control linkage for it.    :dancingbanana: 


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#20 48willys ONLINE  

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Posted May 01, 2015 - 01:43 PM

Getting there, just need to get a lower radiator hose, hydro control, and the steering linkage worked out.

1430491473_zps8b0059bd.jpg

1430491760_zps56f1c2c4.jpg


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#21 Cub123 OFFLINE  

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Posted May 03, 2015 - 07:16 AM

Started it yesterday and everything looks great, hydro and lift works as it should and the drive shaft runs nice and smooth.
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#22 48willys ONLINE  

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Posted May 07, 2015 - 10:36 AM

Hydro control is mostly done, had a little trouble comeing up with a centering device,but I think it should work ok.1431011816_zpsc350c068.jpg


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#23 Austen ONLINE  

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Posted May 20, 2015 - 08:49 PM

Very cool project! Nice work!



#24 48willys ONLINE  

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Posted May 21, 2015 - 07:24 AM

Thank's, really need to get back at it. Waiting on the fan now so I can run it a little longer and maybe get a video, I did take it for a short drive though. It's going to be beast :smilewink:


Edited by 48willys, May 21, 2015 - 09:24 AM.


#25 twostep OFFLINE  

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Posted June 11, 2015 - 06:57 PM

This build is loaded with awesome. I love me some kubota diesel and I love that model BH. Too bad they are so rare. Keep up the good work and drag that thing down to Daniels plowday this fall!!



#26 48willys ONLINE  

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Posted July 07, 2015 - 08:59 AM

Just to update this thread so everyone knows this project hasn’t stalled.  I’ve been waiting almost 2 months for the fan because it’s been on back order.  So last night I got it on and ran it around some, temp stayed right at 175 so it looks like it might stay cool, but I’ll have to see what it does under load. Also got the gauges installed and almost have the exhaust done, started working on the cat 0 rear lift too.


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#27 twostep OFFLINE  

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Posted July 09, 2015 - 07:19 PM

Thanks for the update but we need more pictures!

#28 48willys ONLINE  

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Posted July 15, 2015 - 09:29 AM

1436969376_zpsc51f1f90.jpg1436968309_zps40fa5fff.jpg



#29 Cub123 OFFLINE  

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Posted July 15, 2015 - 10:13 AM

Here's a quick video, hopefully it works.
http://i1192.photobu...zpsbaf4b7f3.mp4
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#30 Cub123 OFFLINE  

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Posted July 19, 2015 - 05:07 PM

We got the three point finished today and tested it with my brinly back blade, everything seems to be working great, and it can lift plenty of weight.
1437341028_zpse747fccf.jpg
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