Top Link ?

[MESSMAKER]

Thinking about hydraulic top link. I am getting mixed answers. Do I need a check valve? I see them sold both ways. What is the quick coupler I need on the hoses. I think it is a 1/2 inch pioneer male. It is going on a Kioti 4710SE.

 

[SylvainG]

A check valve where, on the tank line?

My Kioti LK30 has 1/2" pioneer on the back for the backhoe and pioneer 3/8 on the FEL.

I'm also putting an hydraulic top-link cylinder and I wasn't going to put any check valve. It will be connected where the snow blower chute valve connects to. Mind you, the dealer did a poor job with its setup but I don't think a check valve would have made any difference.

 

[MESSMAKER]

A check valve where, on the tank line?

My Kioti LK30 has 1/2" pioneer on the back for the backhoe and pioneer 3/8 on the FEL.

I'm also putting an hydraulic top-link cylinder and I wasn't going to put any check valve. It will be connected where the snow blower chute valve connects to. Mind you, the dealer did a poor job with its setup but I don't think a check valve would have made any difference.

Some of the top links have a valve on them to prevent bleed off. That, at least, is what I am hearing.

 

[TMGT]

Some of the top links have a valve on them to prevent bleed off. That, at least, is what I am hearing.

I have a pilot operated check valve on my top link, I prefer it as it will hold its position with no leakdown.
If you want to be able to use float on the top link and have a valve with float function to operate it, then don't get the check valve as it will prevent the float function from working.

If you don't have float for the remote you're using then a check valve won't be an issue.

 

[SylvainG]

Where do you put it? Obviously not on the work port since it would prevent the rod from either going it or out.

 

[TMGT]

Where do you put it? Obviously not on the work port since it would prevent the rod from either going it or out.

Its actually a double pilot operated lock valve, but some people just refer to them as check valves.

A lot of the top link cylinders have them already mounted and they are pilot operated.

Once a little pressure us applied from the work ports from the control side, usually a couple hundred psi, the lock valve will open the work ports until the pressure on the control side of the work ports drops below the lock valves opening pressure.
The pressure on the cylinder side of the work ports has no effect on the lock valves operation.

 

[HayDR]

 

[TMGT]

This is the lock valve on an AMA cylinder, I have them on both my tractors.

 

[workinonit]

Mine doesn't have one and it functions perfectly. It doesn't leak down. If you have one that leaks down you have something wrong.

 

[Tinhack]

If you use ground engaging implements, you could blow a hose. The locks help prevent that by keeping the pressure within the cylinder--Pushing or Pulling.

Also, I have the locks on both T-n-T cylinders. That gives me two more remote pairs I wouldn't otherwise have when I don't need T-n-T. Like for bat wings and adjustable disk drags with lift wheels.