snowplow

[gregjo1948]

1710 Ford 4x4 with bucket loader---Mounting a truck snowplow with hydraulic raise and angle. Have a joystick loader style valve block/body to use separately to angle the plow. It has an open center so the fluid can flow thru to the reservoir and still operate my bucket loader. My problem is it won't angle the blade because it is trying to return the fluid from one of the plow cylinders as it is filling the other and it can't. The valve block/body, because it is for a loader, is made for a 2 way cylinder. My question is, can I use this valve body and, if I can, how do I make it work? thanks, gregjo1948

 

[2SteveWI]

Think of the 2 one way cylinders connected by the snowplow blade as one double acting cylinder. As the blade is angled one cyl. extending pushes the other cyl. in returning the oil to sump. Hope that helps, Steve.

 

[gregjo1948]

That's basically what I wrote in the post. The problem is that the fluid can't be pushed out of one cylinder as the other cylinder is extending because the valve block being used is meant for 2-way cylinders. It doesn't allow the fluid being forced out of the returning cylinder to flow back to the reservoir. I would like to know if I can alter the valve block to allow the fluid to back-flow. thanks, gregjo1948

 

[wore out]

(quoted from post at 09:00:35 03/04/23) That's basically what I wrote in the post. The problem is that the fluid can't be pushed out of one cylinder as the other cylinder is extending because the valve block being used is meant for 2-way cylinders. It doesn't allow the fluid being forced out of the returning cylinder to flow back to the reservoir. I would like to know if I can alter the valve block to allow the fluid to back-flow. thanks, gregjo1948

A couple of photos of how you have things connected and of the valve would be helpful.

Or a simple hand-drawn diagram and info on the valve you are using.

 

[Jeff NWOH]

I'm not quite sure why that wouldn't work if both cylinders are hooked to the ports for a single cylinder. It's absolutely no different than a 2 way cylinder. I have an old snowplow that I mount on my skidsteer and the angle function works off the auxiliary ports. It works fine.

Are you using quick connects on your setup right now? It's possible that one of those is bad and not passing fluid. I had a pair on a snowplow once that connected together fine, but weren't the same and wouldn't let the fluid go through. That took a bit to figure out....

 

[moresmoke]

If your hoses are connected to the ports as circled in red, there is no reason for it not to work.

 

[used red MN]

A picture of what you have going would be helpful. You have not stated that you are utilizing the truck raise lower cylinder and that function is handled by raising and lowering the loader. So 2 cylinders on the plow must be for angling. So hopefully understanding correctly that the snowplow angle uses 2 cylinders? One side extends and one side the cylinder retracts as it angles? If so you need to tee the extend port of one cylinder to the retract port of the opposite side, then that will be one hose from your valve. Repeat for the remaining ports for the 2nd hose to the valve.
Edit to clarify do you have 4 hoses connected to a valve as moresmoke show? If so see above and only connect two per above to valve as smoke is showing.


This post was edited by used red MN on 03/04/2023 at 12:13 pm.

 

[LouNY]

Your valve should work if plumbed correctly;
the two lines from your valve should be attached to the base of the single acting cylinders,
one line to each cylinder. When one cylinder is being extended the other should be collapsing and
returning oil to the tank.
This video shows it functioning, I had to mute the sound.
(https://www.youtube.com/watch?v=0XSc7XNS_R4)
Untitled URL Link

 

[gregjo1948]

I'm using just 2 lines/hoses because I'm only trying to angle the blade/plow. I've mounted the plow onto a quick attach plate because I have a quick attach bucket. On the hydraulic block/control there are 4 operating ports---A1-A2 and B1-B2. I've connected the lines to the A1-A2 ports and capped the B1-B2 ports. The problem is that the fluid can't return from the plow into the block/control.

 

[gregjo1948]

I understand how single acting cylinders work. The hydraulic block/control isn't allowing the fluid to return.

 

[used red MN]

You did not answer if you are operating one or two cylinders as I asked in my other reply. Assuming you did not buy the valve new any numbers or other identification on it? If the valve is used what do you know about it, it did work on whatever it was used on last? This valve is only being used for the angle function correct? Does not probably make any difference but how are you feeding this valve? Should be able to unhook all the hoses and use an air gun in the ports to see what opens when the lever is moved to the different positions. I take it you are unable to post a picture? If you can email them to me I could post them.

Edit: Rereading, is the angle operated by 2 one way cylinders as Steve suggested? Never considered that because that is kind of an odd configuration, but I have not been around snowplows that much. It would be connected as he is suggesting and be seen by the valving as one double-acting cylinder. If using two double acting cylinders then my post suggesting the Tee connections should work.

This post was edited by used red MN on 03/05/2023 at 10:15 am.

 

[moresmoke]

Go look at the picture I posted. My best guess is you need to be connected to Ax and Bx. Most valves have an A and B as the work ports on one spool. But it is hard to say without a picture of yours.

 

[chevytaHOE5674]

Like said if you have the 2 hoses from the 2 single acting cylinders hooked up up to the same spool on the valve it should work. When one cylinder is extending it is causing the other to retract and push oil back thru the other port bo different than a typical 2way cylinder.

I've setup 4 old truck plows on various loaders and they are all plumbed this way and work properly. Nothing was changed on the tractor/skid steer valve side in any of the cases to make it work.

 

[Jim.ME]

gregjo1948,

Do you have any quick disconnects in the plumbing to the angle cylinders? If you do, I will suggest you look for issues in the couplers to rule that possibility out. I have seen problems with those on pickups with plows. Some new ones will snap together with old ones, but not match just right internally. others wear enough in the locking balls and ring that they don't open when coupled, same issues as found with tractor remote couplers. I replace them as a pair.


used red MN,

Using two opposing single action cylinders to angle a snowplow is a very common set up. One plumbs to each port of the valve, and they interact like one double acting cylinder. Lift is generally one single acting cylinder.

 

[gregjo1948]

I have a quick disconnect on both lines and they are new.

 

[used red MN]

So where do you stand on picture posting? Were you born in 48? My uncle who farmed together with my dad used to say ..boy you cannot learn any younger.. Do you have a smart phone? Can you log onto this site on it? If so easy from there.