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Anyone ever work on a control valve like this ?

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#16 Cvans OFFLINE  



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Posted October 09, 2015 - 08:44 PM

Extend the cylinder and shut the engine off. Crack the hose that is not suppose to have any pressure on it. As I understand it you should be able to take that hose completely off but just loosening it should tell you.  If you have oil coming out of this fitting the cylinder piston seal is leaking by. If there is no pressure there the valve is likely the problem. 

This is what I've been told anyway. Be careful when loosening any fittings as you might get sprayed. 

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#17 Bruce Dorsi OFFLINE  

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Posted October 10, 2015 - 07:20 AM

Bruce here's the type of external duel pilot operated  check valve I installed on the swing cylinders , each one is a single acting cylinder with one hose attached . It locks the hydraulic fluid in the cylinder until there is pressure to lift the check ball .


Thanks, Al. 


Being pilot-operated, I can understand that it works.  ......When you mentioned double check valve in your first post, I was thinking two individual check valves, and I just couldn't see how that would work without being pilot operated.