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HD12 Hydro Oil Cooler


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#1 Jake OFFLINE  

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Posted March 04, 2016 - 10:52 AM

Anyone ever put a hydro oil cooler on a HD12? I going to take it to PA plow day in April do you think it will help. Just looking for imfo thanks
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#2 olcowhand ONLINE  

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Posted March 04, 2016 - 11:16 AM

It will help immensely!  I plowed with my JBI same hydro setup) and the hydro got insanely hot.  I recommend a hydro oil cooler for anything under a heavy pull such as plowing.  Just put the cooler line to pick up it's oil between the lift valve outlet and the return port in the hydro.


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#3 crittersf1 ONLINE  

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Posted March 04, 2016 - 11:43 AM

The difference in operating temps will surprise you



#4 Jake OFFLINE  

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Posted March 04, 2016 - 01:48 PM

Is there a lot of psi. On that line? I got a oil cooler off a Case garden tractor it about 10" sq. hoses just clamp on do you think it will work? Or should I get a transmission cooler like off a pickup?

#5 Jake OFFLINE  

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Posted March 04, 2016 - 01:57 PM

image.jpeg image.jpeg Case oil cooler
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#6 olcowhand ONLINE  

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Posted March 04, 2016 - 02:36 PM

No pressure except what the fittings may cause. That cooler would work fine long as you can attach it.
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#7 Jake OFFLINE  

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Posted March 04, 2016 - 03:07 PM

One more ? Witch line is the return line thanks againimage.jpeg

#8 olcowhand ONLINE  

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Posted March 06, 2016 - 03:28 PM

One more ? Witch line is the return line thanks againattachicon.gifimage.jpegattachicon.gifimage.jpeg

Pretty sure it's the one on the side of the pump housing, but I'll check one of mine to be sure.


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#9 KennyP ONLINE  

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Posted March 06, 2016 - 04:24 PM

One more ? Witch line is the return line thanks againattachicon.gifimage.jpegattachicon.gifimage.jpeg

If the pic wasn't cropped so close, we could figure it out easier. I have no knowledge of Bolens to find that manual!


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#10 olcowhand ONLINE  

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Posted March 06, 2016 - 06:05 PM

Yes, return port is the side port, where fitting S1801 is in the diagram.


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#11 Jake OFFLINE  

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Posted March 06, 2016 - 06:29 PM

Thanks fo all the help
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#12 1964Deere OFFLINE  

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Posted March 06, 2016 - 10:51 PM

It will help immensely! I plowed with my JBI same hydro setup) and the hydro got insanely hot. I recommend a hydro oil cooler for anything under a heavy pull such as plowing. Just put the cooler line to pick up it's oil between the lift valve outlet and the return port in the hydro.


What will it help immensely? Pulling power or longevity or what are you referring too?

#13 Jake OFFLINE  

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Posted March 13, 2016 - 11:43 AM

Got the cooler on do you think this will work?image.jpeg

#14 olcowhand ONLINE  

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Posted March 13, 2016 - 12:15 PM

That should help a lot.  A fan would be much better, but forward movement plus air flow created by the flywheel fan will boost cooling.


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#15 olcowhand ONLINE  

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Posted March 13, 2016 - 12:18 PM

What will it help immensely? Pulling power or longevity or what are you referring too?

It will improve life of the hydrostat by decreasing wear, limiting oil breakdown, and pulling power by decreasing the thinning level of the oil.  Under heavy use, the hydro can become extremely hot.  


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