Snow plow cyl.

[Hooked_on_HP]

I mounted a TPH snow plow on my FEL. It doesn't have power angle. I was thinking about adding the swing cylinders. Has anyone done this and did you use a single double acting cyl. or two single acting. I am thinking one double acting would be easier to plumb. Also trying to decide how big of a cyl. maby 2.5"?

 

[RickB]

No difference in plumbing ease. SA- run one hose to each cylinder. DA- run both hoses to the same cylinder. If using a single DA cylinder, I'd use at least a 2.5" to keep the cycle time down and decrease the pressure exerted against the piston in the event of shock loads. Adding a cushion valve to either setup is a good idea.

 

[JB4310]

http://www.tractorbynet.com/forums/customization/132732-add-power-angling-landscape-rake-2.html


this is about rakes but might give you some ideas

 

[john_bud]

No difference in plumbing ease. SA- run one hose to each cylinder. DA- run both hoses to the same cylinder. If using a single DA cylinder, I'd use at least a 2.5" to keep the cycle time down and decrease the pressure exerted against the piston in the event of shock loads. Adding a cushion valve to either setup is a good idea.

As I understand it, when you add a cushion valve the blade would swing when you hit an object and the pressure opens the relief valve. Not being a snow plow person, is that what you want to have happen? I imagine (not experience based) that when pushing with one side of the blade only it could open and change the angle fairly easily.

Please fill me in with the straight skinny!

jb

 

[dirtworksequip]

On the JD 390 front blade I have it takes a good deal of pressure against the blade on one side to cause it push back. Not sure what kind of relief setup is working there. I would think it is thru the tractor hydraulics.

Sincerely, Dirt

 

[PILOON]

A ushion valve is kinda like a fuse, generally you'd want it set at lower than the system pressure setting.
On a plow 1500 psi is a nice setting.
Special ones exist for plows and are refered to as 'crossover valves' whereby the fluid from the extended corner side is dumped over to the trailing side cylinder.

Note that cushion or crossover valve will only protect the hydraulics from sudden impact forces on the extended corner of your blade.
The retracted side is as far back as it can go when plowing hence there is no fluid to left to be pushed out of the cylinder.

 

[kcprecision]

Hooked, here is a front blade that I made for my front loader and used a double acting cylinder for the angle feature.
Maybe this will give you some ideas. As you can see this blade is not an adaptation from another blade, it was built from materials that I had laying around. The blade was made from an old air tank.

 

[Hooked_on_HP]

Nice job and thanks for the pics. I decided to go with the single cyl. I am just figureing out where to mount it and get the proper angle so I get full swing in either direction.
Bill

 

[RickB]

A ushion valve is kinda like a fuse, generally you'd want it set at lower than the system pressure setting.
On a plow 1500 psi is a nice setting.
Special ones exist for plows and are refered to as 'crossover valves' whereby the fluid from the extended corner side is dumped over to the trailing side cylinder.

Note that cushion or crossover valve will only protect the hydraulics from sudden impact forces on the extended corner of your blade.
The retracted side is as far back as it can go when plowing hence there is no fluid to left to be pushed out of the cylinder.

You are exactly correct except for your comment on the cushion valve pressure setting. A cushion valve, just like all circuit relief valves, must be set at a point comfortably ABOVE system relief pressure. If not, the cushion valve setting (or circuit relief setting in other applications) effectively becomes the system operating pressure for that circuit. A differential of 250-500 PSI is typical.

 

[slowzuki]

Also cross over relief shouldn't be used on a single double acting cylinder. The volume is not the same on both sides and you won't get the results you hoped for. In one direction it won't move or it will damage the cylinder, the other direction it will suck air and water in past the seals.