EE_Bota
Elite Member
Circle D - I think you are on the right track. I did not have the extra direct relief valve installed when I put the 20ml/r pump on. Thinking about it, I am sure that the original system would be marginal at best, but with higher engine RPM, failure would most likely occur quickly. That is what happened in my case I am sure.
I should mention that when the QD are removed from the pump outlet (pressure side), you will see the hose to the FEL valve block has a smaller internal dia - maybe 5/16" dia at most. The short pump discharge hose has a bigger ID of around 1/2" The relief vales in the valve blocks may not be too efficitient IMO.
I have since added a 10gpm external relief valve in hyd.pump discharge line and set it to open at 1800psi (18 bar). For what I need the 1800 psi pressure is adequate. I have the hose from the relief valve returning to the hydraulic tank. Set up seems to work well so far. Will try to attach a couple of foto's (taken just a day or two ago) to show what I have done - very similar to what other owners have done also.
Without the extra relief valve it will become expensive - the external relief valve is essential IMO.
Cheers
Jim
I think you have a small typo...in bar, you are running ~ 125 bar. Just clearing up the typo, the work looks great, and I'm jealous my tractor doesn't have an external relief like yours.