backhoe hydraulics

[tbenn7362]

HI,
have you checked the pressure at the backhoe? MOst have pressure relief valves built into the valve pack. If the pressure relief is stuck open you would get very little pressure at the backhoe but good pressure elsewhere. you will probably have to disconnect one of the hoses from a cylinder to insert the guage. Make sure you releive the pressure first.

 

[mmurphy]

I do not know what your tractor P.S.I. should be, but sounds on low side to me, someone else should have that info. If it worked great at start when you first got it and started deteriating after that, I would say start eliminating to the problem area. I did not see any mention again of air or bubbles in oil.
Make sure filters are good not plugged.
Air bubbles in excess might be internal leak.(Just what is to much, right!)
You had pressure check done. (Dealer says it is alright. You have not stated if they checked pressure or flow at hoe)
I assume you reconnected disconnects.(Does it seem better for a short time after doing this?)
I seen one part that said loader was sluggish also, get a good feel of what it is running like with hoe on than unhook hoe to see if there is a change.
Try some different things and let the guys know what you are doing and if it works temporarily or not. May be the process of elimination, and possibly something as small as Q.D.'s or a problem in a valve.