Tractor backhoe - homemade

   / Tractor backhoe - homemade #961  
Great thread and impressive work!! Subscribed!
 
   / Tractor backhoe - homemade #962  
I hope it will. What's the hose lenght limit? Here I have some 1.20 m distance
According to this chart you just need to up size the suction hose for runs longer than 5'.

Hydraulic Reference Page - Mac's Hydraulic

Only thing I'd worry about is if you're digging with the nose of the tractor downhill...not sure how much "lift" is too much for a hydraulic pump.

How much flow does your tractor's pump run? Since you're now running hoses the length of the tractor, might as well utilize it's reservoir, pump, cooler, etc. Or maybe run a smaller PTO pump for just swing and use the tractor's pump for the rest. Just some ideas...
 
   / Tractor backhoe - homemade
  • Thread Starter
#963  
I might just incorporate the tank into the bh frame. Already working on it, I will post a picture later. The system will use tandem gear pumps, each with flow 100 l/min. That turned out great on rk - 525. Only this time I will use direct coupling on to a tractor pto shaft with female coupling without flexible shaft inbetween.
 
   / Tractor backhoe - homemade #964  
I can't believe this thread got to 948 posts and I also can't really believe it's been viewed so many times...

...

Well, believe it. You're too close to it to appreciate the stunning engineering and quality of your work. You and 4shorts, who does stunning workmanship and creativity, could rule the world. :)
 
   / Tractor backhoe - homemade
  • Thread Starter
#965  
Kingpost and twin boom development...


16iwcpl.jpg


vzde2h.jpg
 
   / Tractor backhoe - homemade
  • Thread Starter
#967  
Me too...finally I started preparing the parts... this time it takes a bit longer because all the hydraulics are brand new so that's quite expensive... I won't use any repaired parts like last time.
Started to make swing cylinder coupling rings.


2u55gxy.jpg
 
   / Tractor backhoe - homemade #968  
   / Tractor backhoe - homemade
  • Thread Starter
#969  
Yes. Main differences: sideshift frame, tripple boom, main lifting cylinder will be placed under the boom to get more lift force, lower weight, higher reach, 2 joysticks with em valves (to avoid foot pedals)...and last...jaw bucket to replace hydraulic thumb if there will be any money left to do it. :)
Those are great demolition machines
 
   / Tractor backhoe - homemade #970  
We supply the German importer with VA booms for Cat 330 and 335 machines: Germans call it VA, Verstell Ausleger, or adjustable boom. Its popular for main sewer installation, with boom folded it has a lot of strength to lift concrete sewer pipe sections in the hole, and extended, it has enough reach to backfill without repositioning: in narrow inner cities they want to dig, place, and backfill sewer mains while moving the excavator ahead of the trench in one workflow.

A triple boom gives the same benefits as a telescopic dipper, but it is much, much more sturdy, and dont get as sloppy.

Your new backhoe is truely an evolution of the first. I'm looking forward to see what details you come up with 😉
 

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