Using implement where hydraulic piston has only one hose

[audiski86]

I have a fairly heavy duty single axle military trailer that I am going to put a one ton dump body on. One that I am looking at has a telescopic piston that is only power up - it has only one hydraulic line. My goal is to run the dump of the tractor hydraulics. I have a T4030 with one set of remotes in the rear.

My question is how will this work hooking hooking up only one line to the remotes and leaving the other one of the pair blank? I have only used implements that are 2-way, but I thought some older mower conditioners and things had only one hose for the lift. Is this bad for the hydraulic pump leaving one coupling blank?

Thanks

 

[sweettractors]

I have a fairly heavy duty single axle military trailer that I am going to put a one ton dump body on. One that I am looking at has a telescopic piston that is only power up - it has only one hydraulic line. My goal is to run the dump of the tractor hydraulics. I have a T4030 with one set of remotes in the rear.

My question is how will this work hooking hooking up only one line to the remotes and leaving the other one of the pair blank? I have only used implements that are 2-way, but I thought some older mower conditioners and things had only one hose for the lift. Is this bad for the hydraulic pump leaving one coupling blank?

Thanks

Power out 1 line and gravity pushes back the same line going down, No problem. Ken Sweet

 

[audiski86]

Thanks. So what happens with the one remote that has no line connected to it. Depending on whether I have the lever fwd or back there is fluid that either wants to exit the tractor or enter the tractor. Is there some sort of bypass internally?

 

[J_J]

If your are using A work port for the SA, then either plug B work port, or run a hose from B port to tank/return. By plugging B port, the fluid will be relieved to tank when the lever is activated. .

If there is a QD in the B port, just leave it, would be the same as a plugged B port

 

[sweettractors]

Thanks. So what happens with the one remote that has no line connected to it. Depending on whether I have the lever fwd or back there is fluid that either wants to exit the tractor or enter the tractor. Is there some sort of bypass internally?

What would happen, if you pull the lever the wrong way, is the lift pump would squeal. It will do that now if you hit the lever with nothing attached. Ken Sweet

 

[J_J]

It is not the pump that squeals, but the relief valve relieving.

The fluid would exit out of A port at the same time due to the weight of the dumper.

 

[blueriver]

I have a fairly heavy duty single axle military trailer that I am going to put a one ton dump body on. One that I am looking at has a telescopic piston that is only power up - it has only one hydraulic line. My goal is to run the dump of the tractor hydraulics. I have a T4030 with one set of remotes in the rear.

My question is how will this work hooking hooking up only one line to the remotes and leaving the other one of the pair blank? I have only used implements that are 2-way, but I thought some older mower conditioners and things had only one hose for the lift. Is this bad for the hydraulic pump leaving one coupling blank?

Thanks

You will not have any problems. My hay cutter has one hose to raise the cutting bar. Plug into your one remote ... do nothing with the other ... as stated if you move the lever the wrong way the relief valve does the job.

 

[audiski86]

When you say "move the lever the wrong way," don't I have to move the lever the opposite way after I raise the dump? Are you saying that when the dump body is raised to the dump position, it will automatically lower due to the weight when the lever is in the neutral position? I thought I would have to move the lever in the negative or lower direction in order for fluid to be able to escape the piston and return to the tractor. Sorry for the million questions, but I want to make sure before I buy the dump body I am looking at.

 

[AKKAMAAN]

When you say "move the lever the wrong way," don't I have to move the lever the opposite way after I raise the dump? Are you saying that when the dump body is raised to the dump position, it will automatically lower due to the weight when the lever is in the neutral position? I thought I would have to move the lever in the negative or lower direction in order for fluid to be able to escape the piston and return to the tractor. Sorry for the million questions, but I want to make sure before I buy the dump body I am looking at.

As you lower the cylinder, oil will drain to tank...at same time the pump flow will be directed to the opposite port, which is plugged. So pump flow will have to bypass over the relief valve....To avoid this you use a special spool in the valve, that allows pump flow go to straight tank at low pressure, when lowering cylinder....
There is no reason to labor pump and engine when gravity does the job....
So get a control valve that is setup for a single action, SA, cylinder.

What to remember here is that return line, and return filter have to be sized for both return flow from cylinder AND pump flow....

Depending on pump flow, you need to pick an appropriate sized control valve...
Example...look at this RD-5000 SERIES SPOOL OPTION......spool options at page V42, "OPTION A"

 

[blueriver]

As you lower the cylinder, oil will drain to tank...at same time the pump flow will be directed to the opposite port, which is plugged. So pump flow will have to bypass over the relief valve....To avoid this you use a special spool in the valve, that allows pump flow go to straight tank at low pressure, when lowering cylinder....
There is no reason to labor pump and engine when gravity does the job....
So get a control valve that is setup for a single action, SA, cylinder.

What to remember here is that return line, and return filter have to be sized for both return flow from cylinder AND pump flow....

Depending on pump flow, you need to pick an appropriate sized control valve...
Example...look at this RD-5000 SERIES SPOOL OPTION......spool options at page V42, "OPTION A"

I don't think so ... I may very well be wrong. Hook the single hose to the "up" remote. When you want to dump activate the lever and the cylinder will raise release the lever to the nuetral and the cylinder will "hold" activate again and up she goes ... put the lever in the "down" position and gravity will lower the dump.

Both my hay cutters have one hose cylinders ... this is excatly what I have done for years now ... no special valves. My pump or engine never labor ... Maybe I am missing something ???