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Thanks everyone for the suggestions. There's a lot for me to think about

Could someone explain to me why there could be so much different functionality in backhoe operation if you have a valve that has the same specs; closed center, same gpm potential, same spools, same joystick control. All each lever is doing when closed center is opening and allowing hydraulic...

I'd be willing to spend up to $2000 for a good new aftermarket 6 spool valve body with joysticks. I would rather not go used, because hydraulic components can wear so much. I've got so many leaks in my loader backhoe and need them to stop. (Addressing many right now)

2 of the spools are leaking out of the top. Pulled them out and tried to reseal with new oem o-rings, but no luck. (After all internal o-rings have been replaced). I'm assuming there is a lot of internal leaking due to how fast the backhoe drops to the ground so that's why i'm looking for...

My system is closed center. I'm under the impression that it doesn't need reliefs. I've been through the whole backhoe control valve twice. All new Deere OEM o rings. 2 of the spools just wont stop leaking. Also VERY hard to find perfect valves for a 1968 JD 500. I'd rather buy something new. I...

Thanks for the info. I've found quite a few of 'questionable' quality. Summit looks like they have the exact same one that many others have. I can buy it on eBay for $235, but I have no idea how long the thing will last, if it works at all. I'd rather have something made in America, but if not...

I have a 1968 John Deere 500. It has around 23 gpm flow from the hydraulic pump. The tractor has a 13ft backhoe and is 80 hp. I need to replace the 6 spool backhoe control valve because it can't be repaired correctly. The only good quality aftermarket part that I can find only has 12 gpm. It's a...

EDITED TO TRY TO CLARIFY BETTER: What i'm trying to accomplish is to run 2 variable speed piston pumps off of the Flywheel of a 35hp Briggs Vanguard to power 2, or possibly 4 hydraulic wheel motors. I am trying to understand whether putting the second pump in Tandem on the Flywheel shaft will...

I'm wondering if, or how it's possible to limit or control the hydraulic flow of a gear pump running an FEL or Backhoe so that there's not excessive GPM of hydraulic oil flowing constantly creating unnecessary heat when the FEL isn't being used. I'm going to be running 2 variable piston pumps...

Hi. I've read many knowledgeable users on this forum state calculations for HP requirements to drive Hydraulic Pumps, yet to my inexperienced mind they seem to contradict the calculations from most websites, Surplus Center being one example. Surplus Center Calculator states that Gas Engines...