Need to Fabricate Subframe for JD 8 Backhoe!

   / Need to Fabricate Subframe for JD 8 Backhoe! #1  

C1carrier

New member
Joined
Jan 6, 2018
Messages
6
Location
Lakeside, MT
Tractor
John Deere 850
I bought a JD 8 backhoe to attach to my 850, it has no subframe. Have had no luck finding one either nor the hangers. So I am considering fabing one including the hangers. Does anyone out there have an 8 attached to a 50 series tractor? I am in need of some basic dimensions of the subframe and rear hanger. Or if someone has parts they are willing to sell, even better!

Thanks in advance!
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Last edited:
   / Need to Fabricate Subframe for JD 8 Backhoe!
  • Thread Starter
#2  
I bought a JD 8 backhoe to attach to my 850, it has no subframe. Have had no luck finding one either nor the hangers. So I am considering fabing one including the hangers. Does anyone out there have an 8 attached to a 50 series tractor? I am in need of some basic dimensions of the subframe and rear hanger. Or if someone has parts they are willing to sell, even better!

Thanks in advance!
View attachment 559830View attachment 559831View attachment 559829


I was able to get the rear hanger. Now I need the subframe and front hangers...anyone out there have one they壇 be willing to part with?
 
   / Need to Fabricate Subframe for JD 8 Backhoe! #3  
I was able to get the rear hanger. Now I need the subframe and front hangers...anyone out there have one they壇 be willing to part with?

I was a fabricator for quite a few years, maybe I can help.. When we had to build parts to fit on existing equipment, you have to use "DATUM points" and math.
Your shop floor is a great place for a datum point if it is concrete. All you need is a plumb bob, or a level and straight edge. Either have clean concrete, or tape a piece of rolled brown paper on the floor and start transposing points down to the floor, Start with the X and Y axis... (front to back, side to side) and find the edges of the mating surfaces.

Allow 1/8" clearance for fit. Last measure the vertical component of the part... Use the same edge of bolt holes to exactly measure the center, just don't forget to add 1/2 the hole dia. to the first measurement.
 

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