Great Bend 652 spooler Valve issue

[Yanmar1401D]

Hey KennyD,

Yes I did. I found out what type of system it was (open/closed). I put it back together and double checked the o-rings. None pinched. I did not buy any Homedepot connectors, all from a hydraulic shop. Sorry but did I miss something?

thanks.

 

[kennyd]

Sorry but did I miss something?

thanks.

Yes:

You do not have it hooked up properly. You CANNOT Tee into high pressure oil lines. ALL valves MUST be added in series. Hydraulic fluid-like electricity will "take the path of least resistance" so that is why you had to "cap off the loader" to use the backhoe.

And:

My best suggestion is this: Put EVERYTHING back together the way it was, and see if you still have the leak-it's possible you pinched an O-ring while re-assembling it. There is an outside chance you cracked the valve. Then once that is fixed you can research how to properly add a new valve to your machine.

It could be the way you have it plumbed is adding restriction, causing the fluid to leak, or one of the valve sections is cracked.

 

[Yanmar1401D]

appreciate your patience, I currently have the loader disconnected and the backhoe is hooked up the same way the loader was. Do you think this is still incorrect? If so, how else do I hook it up? If there is a cracked valve, how would I look for that. I looked at all of them visual and nothing obvious.

After I fix the leak....I assume when you mean in series that the hydrulic hoses will come off the loader valve to the backhoe. Correct?

maybe some pictures would help?

Thanks

 

[AKKAMAAN]

I made some research and found good info on the V20 valve Open Center, at Lifcohydraulics


Here is a picture of a V20 valve assembly....

Cross section

If your leaks are at the marked bolt holes, either the o-rings are leaking or you have a cracked section....

The long bolts have to be tightened with a torque wrench, try to find Parkers recommendations....

BTW for everybody else...this LifcoHydraulics site have a huge data base of valuable information about all sorts of valves etc...real good pdf's.....
click on a brand logo and browse the database
Lifco Hydraulics Product Line

 

[mmurphy]

Reread Kennyd's #8 post.
So you say you have a open/closed center system?
I am just guessing you have open center tractor hydraulics, and using a closed center hydraulic vale on BH. If it is capped at the loader valves so oil is not flowing anywhere, like back to tank you will be trying to stop that leak longer then BP!

 

[Yanmar1401D]

Thank you all for your help. I found the problem. Unfortunately it could not be as easy as a o-ring. I found that the outlet cover was cracked in 2 places. When I pulled the coversion plug (right side of the valve when seated in the back hoe) the cracks were right in the treads going to both bolt heads. Anyone have a good place to purchase Parker V20 parts or can this be fixed? i.e. welded?

thanks

 

[AKKAMAAN]

Thank you all for your help. I found the problem. Unfortunately it could not be as easy as a o-ring. I found that the outlet cover was cracked in 2 places. When I pulled the coversion plug (right side of the valve when seated in the back hoe) the cracks were right in the treads going to both bolt heads. Anyone have a good place to purchase Parker V20 parts or can this be fixed? i.e. welded?

thanks

get a new outlet cover....welding cast iron in hydraulics is waste of money even trying....

 

[J_J]

That crack was probably caused by the reversal of the high pressure hose. I have mentioned about the return ports not designed for the same operating pressure as the input ports. It only takes a micro-second to crack it. This is what may happen if adding valves in series that don't have a PB outlet. Some valves have high pressure ratings on both input and output ports. If you don't have the documentation, you are taking a chance with some expensive valves.

 

[AKKAMAAN]

Anyone have a good place to purchase Parker V20 parts

Call 1-800-895-4326 Toll-free
Lifcohydraulics
for outlet cover #6770 for a V20 valve

 

[Yanmar1401D]

Well replaced the cracked cover and started up the tractor and no leaks! Thought that I was in the clear. Not my luck, put it all back together and now the spooler valve are frozen! Will not move. I disconnected the back hoe from the tractor and still will not move. I cracked a couple of line thinking excess pressure but nothing doing. Going nuts. Any idea what may be causing this? None of the 6 valves will move even when the tractor is not running and disconnected.

thanks