Question about Hydraulics

[bryan_norcal]

We have an older Rayco self propelled stump grinder. The up/down is the issue. It stopped going down when you push the valve in, but still goes up. Heres the kicker, when pulling the lever out for up, theres a very small spot that lets the ram bleed down (small as in 1/8"), pull too far it goes up, hit the right spot it bleeds down. Does this sound like a valve issue, ram issue, or both? Thanks for any help!

Galaxy S4

 

[jaroh]

Sounds like a valve issue. Something to remember while working with simple hydraulic systems, everything you are trying to run (ram) is dumb, waiting to be told what to do(valve).

 

[bryan_norcal]

Sounds like a valve issue. Something to remember while working with simple hydraulic systems, everything you are trying to run (ram) is dumb, waiting to be told what to do(valve).

Thats what i told bossman. He was ready to buy a $88 ram from who knows where. Well take her to rhe hydraulics shop for a valve rework. Thanks a lot!

Galaxy S4

 

[bryan_norcal]

Sounds like a valve issue. Something to remember while working with simple hydraulic systems, everything you are trying to run (ram) is dumb, waiting to be told what to do(valve).

So because it will bleed down(thou using valve the wrong direction,) it only lets it bleed down till it hits bottom. There no penetration forced down.

Galaxy S4

 

[jaroh]

So because it will bleed down(thou using valve the wrong direction,) it only lets it bleed down till it hits bottom. There no penetration forced down.



From reading your first post I would have to say yes. If the ram is bleeding down it means the valve has opened a path to the return and will stop once it hits bottom.

 

[CalTreeEquip]

rebuilt the valve.