Just got a couple of questions on the hydraulics for my post hole digger. Im using a 3.18 gear box with a Danfoss 6.9 cu motor mounted off the ssqa. I plan on using the power beyond from the backhoe to a valve, then to the motor. The question I have is there is three lines for the Kubota BH 70 backhoe and three lines that can be hooked to the valve P,N,T. Is line T coming off the valve a low pressure line going back to the tank? I believe the line coming back from the backhoe is a low pressure. Thanks
Doing a hyd post hole digger.
- Thread starter Dwiz
- Start date
5030
Epic Contributor
- Joined
- Feb 21, 2003
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- 24,677
- Location
- SE Michigan in the middle of nowhere
- Tractor
- Kubota M9000 HDCC3 M9000 HDC
Sure you have enough flow to spin the motor sufficiently? Don't believe the B series Kubota has enough flow but I could be wrong.
old and tired
Veteran Member
Yes, and that is the only hydraulic line that can have a "T" connector (multiple lines connected together; all low pressure return to tank.)
5030
Epic Contributor
- Joined
- Feb 21, 2003
- Messages
- 24,677
- Location
- SE Michigan in the middle of nowhere
- Tractor
- Kubota M9000 HDCC3 M9000 HDC
When you get it hooked up and working, please let us know how well it works. I sold my PHD and bought a Shaver post pounder, much quicker, no backfill and it will pound RxR ties too.
prichard
Veteran Member
If you bh is end of the line maybe it doesn't have pb. You may have to grab the inlet of the bh valve.
I only have about 50 post to put in. The soil is clay with some rock but when its done I will post pics and maybe a video. I know alot of people have posted on what torque, speed and gpm is needed so were gonna find out. I should complete the project by the end of Feburary.
Comes from the loader through the BH and to the 3 point. I installed the BH and lines and knew the blue line was low pressure just didnt know if the valve was low pressure return.
Sarbatche
New member
Any update on this?