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Hydraulic front assist axle

J

Jason Kozlowski

Member
I found what appears to be a hydrulic front assist axle for a 70 or 90 series tractor. Does anybody know about these. I have heard, of Mud hog axles, but have not seen one, is that what this is? What you see is all that there is, does anybody know what is missing?
a22246.jpg

a22247.jpg

a22248.jpg
 
Have not seen one up close to know what's missing but I have heard they take more power to run then they are useful. Just what I've heard from several others. Looks like a cool addition though.
 
Jason the mud hog units I have seen were like the mechanical ones that the 20-2290's had but were hyd powered(one had a Hyd planitary drive on each wheel but was a solid axle, one drove from the center of the axle) but am sure more than one design is out there, have seen the same ones(maybe not the same but they looked like them) as your photo shows at a salvage yard and was told they were off a A/C combine just a thought Tom
 
I called Mud Hog, and according to them these are for 90 series tractors, and were never intended for the 70 series. They originally came with a hydraulic valve box with electronic sensors, and an electronic control box that mounted in the cab to control the front assist. Nothing is available for them (no surprise there), they couldn"t even send me information on them or a parts tear down for them. It seems that companies now toss their older materials, or they just don"t want to look outside the computer.

Personally, it seems that these would have a place on a 70 series tractor, but since Case had a MFD option for the 90 series, why would you go with this over the factory option?
 
Jason as to why not get it from Case to start with the MFD was only available on the 20-2290 in 82 last year of production for them = not many had the option to order on these and the 23-2590 never had MFD option but you could get the 33-3594 but it was in 4-WD all the time if that makes sense than that was my two
 
Tom, I was actually aware of all that, except I wasn't sure what year the the MFD option was added. I was just too lazy to look it up. My thought is that it was primarily just a cheap alternative to trading up.
 
I can guarantee that is not factory from Case for either the 70 or 90 or even 94 series Case tractors. They were all mechanical and no hydraulics to them.
 
Our local CP&E store really liked to install those on 23 and 2590s. You could never get the front axle speed to match the rear axle quite right. Plus as they got some age on them the electrical part got very tempermental. From the looks of it, they are right where they belong
 
When I was a Case dealer I knew a couple of guys in the R&D dept at Racine. We had a 1070 PS with ROPS sent to Dyneer Systems, MUD HOG and they designed a hydraulic front assist for it. They mounted a crank driven variable displacement pump and controls on the front of it and put electronic switches on the C1-3 test ports to change pump displacement. And then it was shipped to us. As stated they were abit tempramental. The 90series tractors had a much better hydraulic system and the MUD HOG was driven by the main pump. The 1070 is still in service on a farm about 17 miles from me. If I get that way I will try to get a pic. to post. It was in the shop for a Torque limiter last fall. We also sold several 20-2290s with MUD HOGS. I don't know where they are now.Case developed a relationship with Eaton? and dealers did install a mechanical front assist on 930s Pics. were posted here earlier this year showing one. I don't know why they stopped that program. They certainly fell behind, until the MFD was offered on the late 90 series.
 
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