Snowplow only angle one direction

[LD1]

I use 2 single acting opposed cylinders from a converted truck plow off of my loader hydraulics for left/right. So this is a mechanically connected double acting cylinder. Then a double acting for up/down. I need and use down pressure on my plow for tackling ice buildups. Just an old p/u truck plow. Works VERY well.

Can't really look at it as a mechanically connected DA cylinder. Since a DA cylinder works on Regen....and a pair of SA cylinders don't.

 

[davisgary2]

3 Spool 25 GPM Joystick Loader Valve w/Grapple | Directional Control Valves | Hydraulic Valves | Hydraulics | www.surpluscenter.com I was looking at this valve, would this work for a snowplow grapple application?

 

[LD1]

Thank you both, being a hydraulic novice, this is new to me. Curious though; what would describe my current valve type and what do i need? I think I'm confusing the terms like is a 2-spool the same as double acting and 3-way the same as 3-position? I think I have a 2-spool/3-position and need a 2-spool / 4-position.

A little more detail on this now that I am home.

Number of spools is mechanically how many spools is in the valve. In other words how many circuits it can control.

A loader valve is 2-spools. Older equipment...this meant two levers. Modern stuff has a joystick to control two spools. One spool controls raise and lower either by pushing in on the spool or pulling out. The other spool controls curl and dump...again either by pushing or pulling the spool into and out of the valve body. The spool is what actually directs the fluid from the different ports.

Now the term 3-way or 4 way has to do with weather the valve is designed for a single output per spool like a singe, single acting cylinder. Which would be a 3-way with only P T and a single work port.

A 4-way valve has TWO outputs per spool to control a double acting cylinder. Or in the case of a snow plow...a pair of single acting cylinder.

A 2-way valve would be like a ball valve. Simple on and off.

A 6-way valve would be like your selector that has only one spool for directing flow, but has 4 output ports PLUS the P and T...so 6 total

Number of positions has to do with how many positions the lever has for each spool.

3-way is standard. It has a neutral where nothing happens, one direction to pressurize one of the work ports, and another position to pressurize the other work port (if controlling a DA cylinder) or in the case of a single SA cylinder, the other position would just vent back to tank and let gravity work.

4-pos means the valve lever has a 4th position. Like your raise and lower on your loader. You have up, neutran, down, and float.

Some have 4 the position detent to hold the valve on. Some are only 3 position but still have a detent on one or both directions.

A 2- position valve would not be used for a double acting cylinder, but sometimes on a SA cylinder. Where you hold the lever to actuate the hydraulics, and letting off returns to neutral.

 

[Scycle]

A little more detail on this now that I am home.

Number of spools is mechanically how many spools is in the valve. In other words how many circuits it can control.

A loader valve is 2-spools. Older equipment...this meant two levers. Modern stuff has a joystick to control two spools. One spool controls raise and lower either by pushing in on the spool or pulling out. The other spool controls curl and dump...again either by pushing or pulling the spool into and out of the valve body. The spool is what actually directs the fluid from the different ports.

Now the term 3-way or 4 way has to do with weather the valve is designed for a single output per spool like a singe, single acting cylinder. Which would be a 3-way with only P T and a single work port.

A 4-way valve has TWO outputs per spool to control a double acting cylinder. Or in the case of a snow plow...a pair of single acting cylinder.

A 2-way valve would be like a ball valve. Simple on and off.

A 6-way valve would be like your selector that has only one spool for directing flow, but has 4 output ports PLUS the P and T...so 6 total

Number of positions has to do with how many positions the lever has for each spool.

3-way is standard. It has a neutral where nothing happens, one direction to pressurize one of the work ports, and another position to pressurize the other work port (if controlling a DA cylinder) or in the case of a single SA cylinder, the other position would just vent back to tank and let gravity work.

4-pos means the valve lever has a 4th position. Like your raise and lower on your loader. You have up, neutran, down, and float.

Some have 4 the position detent to hold the valve on. Some are only 3 position but still have a detent on one or both directions.

A 2- position valve would not be used for a double acting cylinder, but sometimes on a SA cylinder. Where you hold the lever to actuate the hydraulics, and letting off returns to neutral.

Would this valve work to replace the loader valve which has a detent before it goes into regen that would angle the plow right? Some of the reading I've done talks about an optional 4 position valve offered by Kubota, but I don't recall being told about it.
2 Spool Compact 1 GPM Joystick Control Valve | Brand | Brands | www.surpluscenter.com

 

[LD1]

Yes, that valve should work as long as you don't push it all the way into Regen when trying to angle right.

For similar money thought, I'd get a joystick with a button and an electric solenoid diverter and forget the manual selector. Especially if you have any plans for a grapple.in your future

 

[Scycle]

Yes, that valve should work as long as you don't push it all the way into Regen when trying to angle right.

For similar money thought, I'd get a joystick with a button and an electric solenoid diverter and forget the manual selector. Especially if you have any plans for a grapple.in your future

You're talking about putting the electric solenoid in the lift /lower circuit, correct? Do you have info on the system you used or similar?

 

[LD1]

You're talking about putting the electric solenoid in the lift /lower circuit, correct? Do you have info on the system you used or similar?

Yes that's what I am talking about.

Link to info in my signature

 

[Fallon]

Can't really look at it as a mechanically connected DA cylinder. Since a DA cylinder works on Regen....and a pair of SA cylinders don't.

To clarify...

Regen dumps full hydraulic pressure to both the rod & cylinder ends of the system. As the cylinder side of the piston has more surface area than the rod end (because the rod is there taking up space) the cylinder end overpowers the rod end to extend the cylinder. They do this because dumping a full bucket quickly requires a lot of fluid (rod end fluid moves from the rod end hoses to the cylinder end in addition to the fresh fluid from the valve). Also due to leverage of the load pulling down on the bucket if there isn't plenty of pressurized fluid avalible worn cylinders will suck in air. That causes floppy buckets & nobody respects a floppy bucket.

If you apply regen (full pressure) to both sides of a pair of single acting cylinders they are equal. One isn't smaller than the other because of the rod taking up space.