Snow plow cylinder diagram? Cushion Valve?

[landman]

SO what if you wanted to use a double action pump and dc motor to power the cylanders.. Ive got a tractor that I dont want to hook into the hydrolics from the tractor.. trying to wrap my head around this.. wont the double action pump prevent the other cylander from retracting when positions are changed.. or will the oil just flow out of the cylander into the tank?

 

[Fallon]

SO what if you wanted to use a double action pump and dc motor to power the cylanders.. Ive got a tractor that I dont want to hook into the hydrolics from the tractor.. trying to wrap my head around this.. wont the double action pump prevent the other cylander from retracting when positions are changed.. or will the oil just flow out of the cylander into the tank?

Opposed single action cylinders are plumbed in & function like a single double action cylinder. If you have a pair of double acting cylinders you can just put a vent on the rod end to turn them into single acting cylinders. Tying the 2 rod fittings together with a hose would keep moisture out. It would be rather irrelevant if the hose was full of air or oil.

 

[LD1]

That was a painful read.

DA cylinders can be plumbed as SA cylinders as mentioned...

Or you can see the rod port of cylinder A to base port of cylinder B.....and vice versa....to have a push-pull effect.

One cylinder pushes....one pulls.

Only using ONE double acting cylinder makes a crossover valve not work

 

[landman]

Was going to order this double acting rig and a couple of single acting cylanders.. my question is will the load holding valve not allow the fluid from the extended cylander retreat back into the tank when angling the plow in a different direction.. do i just plumb from port a to one cylander and port b to the other.. is it that easy... already a pressure relief valve on pump...http://cdn.premium-supply.com/KTI_Docs/double-acting-pump-manual.pdf

 

[LD1]

Get one without a load holding valve IMO.

That load holding valve isn't gonna be the problem....if wired and plumbed right....but that secondary check valve that is set at 1500 psi for load lowering...that is gonna cause problems on a plow