loader control for rear remote

[jacobsdaddy06]

this is what im looking to do found pic on red power website, if i have one going to curl and one to dump this should work right?

 

[J_J]

Those are DA cyl and a loader valve will work, just don't use the float or the regen.

Actually, you could use float if you wanted the sickle bar to follow the contour of the ground.

Any two spool valve will operate those cyl.

 

[Tx Jim]

jacobsdaddy06

Does your SA cyl have one hose port and a breather port, or is that cyl a DA cyl with a breather adapter in the rod end.
Is your sickle bar mower powered up or down?

All sickle mowers I've ever seen with a hyd cyl were only powered up. IIRC JD sickle mower linkage allowed cutter bar to float up therefore couldn't be powered up.

J_J
I have a question on hyd cylinder with one hose & a breather port on opposite end of barrel that you state is double acting although it's utilized as single acting. That's similar to the type hyd cylinder my Vermeer 7030 disc mower has. How can a true single acting cylinder with no breather not create a vacuum on opposite side of piston from the oil?
Thanks,Jim

 

[J_J]

Jim,

That SA cyl has a port somewhere, or it would pull a vacuum. It might be on the gland nut. If you put your ear close to the cyl as you retract it, you should hear air or if you put soapy water all over the cyl, you might see bubbles.

Those cyl posted above with two hoses each are SA cyl or someone has added a hose to the vent port.

You should be able to tell by looking at the valve, If he is controlling a SA cyl using a DA valve, one of the work ports would be plugged, or the other hose is gong to tank.

A true SA valve only has one work port.

1 SPOOL SA CESSNA CONTROL VALVE 30 GPM

4" X 4" X 1-1/2" SA HYD CYL

Excerpt:

Somewhere at the top of the tube there might be a hole that lets air in and out of the pipe depending on the piston movement.

 

[Tx Jim]

Jim,

That SA cyl has a port somewhere, or it would pull a vacuum.

I've seen/repaired SA cylinders on combine/SP windrowers that have "no breathers" but also have no piston as the cyl rod is actually utilized as the piston.

 

[J_J]

Excerpt:

■ SINGLE-ACTING CYLINDER
The single-acting
cylinder is pressurized
at one end only, with the
opposite end vented to
atmosphere through a
breather filter (air cylinder)
or vented to a reservoir
(hydraulic cylinder).
The return stroke of the
cylinder is accomplished
by some external means

What you are talking about is a ram.

There is no air space.

No air vent is needed since oil fills the whole inner chamber of the cylinder housing. Once again spring action or gravity is necessary for retraction

SA piston seals might also be different.