CDP MID600 "backhoe build" project

[Dongerosa]

Getting back on my "backhoe build" project that started in Feb. 2004 for a BX Bota, now it's going on a B7510...think it's about time to get'erdone! looking through all my notes and instructions got a few questions.

being new to all this stuff...and spent way too many hours on this site lurking at hoe threads...3pt attachment issues...sub-frame builds. So, building a sub-frame for my 3pt designed hoe, finally got the design that I think will work with the metal i got in my shop.

#1. it states to use JIC#6 hoses, now looking at Surplus Center they have two hose sizes, 1/4 or 3/8 dia. I'm thinking with the 2" cylinders and a 5 GPM pump the 1/4" should be fine. my thinking correct?

#2. never used a backhoe before...So, what would be the best/most used pattern for controls to learn on....ISO or SAE or other?

Great Site!

 

[medic0648]

3/8 would be better. My yanmar uses 3/8 on almost everything. The 1/4 is very small for the flow.

 

[Dongerosa]

3/8 it will be!

now ISO or SAE control for the two lever valve...pictures attached!
View attachment 295464
View attachment 295465

 

[Jose G]

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[Dongerosa]

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lets try this....ISO pattern.... http://www.google.com/imgres?hl=en&...w=197&start=0&ndsp=22&ved=1t:429,r:0,s:0,i:85

SAE pattern..... http://www.google.com/imgres?um=1&h...0&ndsp=27&ved=1t:429,r:0,s:0,i:85&tx=87&ty=58

 

[Dongerosa]

An project up date...got the sub frame done...a few, self created, issues with the front mounting, but is done now! bolts on the the front two 5/8 dia. on each side...the rear has 1 inch stubs that fit into axle brkts.


next step...weld hoe base to the sub-frame.

Pic of all the parts....

 

[CDN Farm Boy]

My BH77 on my B3300SU uses ISO pattern (along with every other backhoe/excavator I've run). It also uses 3/8 lines as the main pressure and return to the BH valve with 1/4" lines to the cylinders.

 

[Dongerosa]

My BH77 on my B3300SU uses ISO pattern (along with every other backhoe/excavator I've run). It also uses 3/8 lines as the main pressure and return to the BH valve with 1/4" lines to the cylinders.

Thks for the ISO and line size feedback.

made a little more progress in the garage...

 

[Dongerosa]

a few more pictures...

arm mock-up



stabilizers with center section...



starting to look like a backhoe....:cool2:

 

[ptgdigger]

Looks great ! I like that the pieces have the modern style as see on a commercial backhoe unit.

You mention CDP so I assume either the pivot weldments were bought from them or cut to their template, I just find it odd that the ends of the pivot weldments are straight were the get welded to the tubes. I was always taught that you should never weld straight across a boom or arm on ground engaging equipment, commercial machines like Case or Deere go to extremes to eliminate straight welds on their hoes and front loader arms. I realize this is a much lower stress application , it's just that CDP seems to have done a good deal of engineering on this and I'm surprised they left it out.

Picture for clarity of what I'm talking about:


Ray