Electric diverter valve problem

[fjellheimen]

Hi
I'm in the process of adding a 3rd function for my grapple on an old John Deere 1040 using a 12v solenoid diverter valve.

When the solenoid doesn't get power oil flows from the bottom ports and through the two middle ports. However when the solenoid gets powered it stops oil flowing through the middle ports, but no oil flows through the two top ports. Any ideas on what the problem might be?

 

[LouNY]

I'd say it's plumbed backwards.
All of mine when de-energized flow is straight through,
then when energized it is diverted to the side ports.

 

[oldnslo]

What are the markings by all the ports? Are any of the ports labeled P1, P2? If yes those would be the common ports or inlet to the diverter Like Lou I suspect a plumbing issue.

 

[fjellheimen]

The two ports on the bottom are labeled P1 and P2 and are connected to the ports on my hydraulic central.

 

[LouNY]

That looks like it would be right, but.
When I mounted mine the blocks could be stacked with O-ring seals between the blocks you could stack as many as 5 together,
the attached pdf says 3 in series.
It seems to me that your inputs the "P" ports may be the middle ports.
It has been a while since I did my last one of those and I recall the directions to be confusing and contradictory.
When you say your hydraulic central are you referring to your curl output from the loader valve to the curl cylinders?

 

[oldnslo]

The picture in post 4 showing P1 & P2. Next to P2 is an arrow pointing towards the port above it. Do you have any literature on this valve or brand and or model code. Unfortunately I have seen diverter where two side ports are inlet and also where the two top ports are inlet.

you would have to unhook a couple lines but could verify porting with air hose to see which ports are inlets.

 

[BukitCase]

Looking at your first picture, no power should connect the two bottom ports (inlet) to the two TOP ports (outlet) - energizing the solenoid SHOULD connect the two bottom ports to the two MIDDLE ports and NOT to the two top ports.

Don't ask how I know this, but if you reverse top and bottom ports, you should STILL get flow when NOT energized, BUT - energising will stop ALL flow.

Only thing I can think of that would cause what you describe is (maybe) an incorrectly installed spool (the "switch" that's moved by the solenoid.

Look at the arrows next to the ports - these SHOULD indicate flow, so whatever function you're "diverting" (like the curl function) should come in the bottom and out the top when NOT powered - as Lou said, power should cause the bottom (inlet) to be switched to the middle ports (still looking at your first picture)

You could try disconnecting ALL hoses (tractor NOT running, of course) - then, a gentle blow with an air hose (NOT powered) IN to the bottom ports SHOULD be felt out of the top ports (A or B) - power to solenoid SHOULD cause air into bottom to be felt at the MIDDLE ports.

If this is NOT what happens, your diverter is either defective or a REALLY ODD model... Steve

Edit - if "oldnslow" is true, guess that makes me "older and slower" (definitely the slow part)

 

[fjellheimen]

Guess I have to disconnect the hoses and blow some air (and waste some hydraulic oil).

The diverter is model number shv6/2-dc12-b purchased from hydraulic-master.com don't see any brand name on it. Documentation is unfortunately lacking.

 

[BukitCase]

The possible GOOD news - since you're NOT stacking multiple diverters, once you know what's REALLY in's and out's you should be able to move your hoses - (didn't say this wouldbe EASY :=)... Steve

 

[jigs_n_fixtures]

Hi
I'm in the process of adding a 3rd function for my grapple on an old John Deere 1040 using a 12v solenoid diverter valve.

When the solenoid doesn't get power oil flows from the bottom ports and through the two middle ports. However when the solenoid gets powered it stops oil flowing through the middle ports, but no oil flows through the two top ports. Any ideas on what the problem might be?
View attachment 741762

I think it is not plumbed correctly. When it is deenergizzed, the flow should go out the A and B ports on the top, the cast in labels can be seen in your photo. The ones facing out should be labeled C and D, the two on the bottom should be labeled P1 and P2.

A and B should always be the normal flow in the de-energized state.
C and D should always be flowing when the solenoid is energized.
P1 and P2 are always the inlets. If you are stacking valves, the A and B ports get sealed to the P ports of the next valve, the actual hookup varies by the valve manufacturer.