Hydraulic dampener (Flow Restrictors)

[Chandler]

The hydraulic cyclinders open and close too fast and too hard on my grapple. I think I read somewhere that you could install a part to slow it down. Anyone know or remember what that is?

 

[OldMachinist]

They're called flow restrictors. Basicly they are just a fitting with a reduced inside diameter. http://www.mcmaster.com/#flow-restrictors/=2abwdq You make one by plugging up a standard fitting and drilling a small hole thru it and just keep opening up the hole size until you get the speed you want. They also make adjustable ones called flow controls. http://www.northerntool.com/webapp/wcs/stores/servlet/product_6970_200336352_200336352

 

[mrfixitpaul]

They're called flow restrictors. Basicly they are just a fitting with a reduced inside diameter. http://www.mcmaster.com/#flow-restrictors/=2abwdq You make one by plugging up a standard fitting and drilling a small hole thru it and just keep opening up the hole size until you get the speed you want. They also make adjustable ones called flow controls. http://www.northerntool.com/webapp/wcs/stores/servlet/product_6970_200336352_200336352

We used to install an orifice between the hose and jic fittings on both lines at quick couplers. The part was made of copper, had a small hole in it (maybe 1/16") and was shaped such that it was held in place by the jic taper. Probably in stock at local dealer for a few $$.

 

[Chandler]

We used to install an orifice between the hose and jic fittings on both lines at quick couplers. The part was made of copper, had a small hole in it (maybe 1/16") and was shaped such that it was held in place by the jic taper. Probably in stock at local dealer for a few $$.

Thanks a lot for the info. Old Machinist and mrfixitpaul. I'll get some parts and give it a try.

 

[Chandler]

Thanks a lot for the info. Old Machinist and mrfixitpaul. I'll get some parts and give it a try.

OK, another question. Do I need to install a flow control on both lines, on the line going out to the attachment and on the line coming back?

 

[OldMachinist]

OK, another question. Do I need to install a flow control on both lines, on the line going out to the attachment and on the line coming back?

It depends on a couple of things. If you use just a restrictor then the oil will flow slowly both directions. If you use a adjustable flow control it only controls the flow one direction and if you want to control the return flow you'll need one on both lines.

 

[Chandler]

It depends on a couple of things. If you use just a restrictor then the oil will flow slowly both directions. If you use a adjustable flow control it only controls the flow one direction and if you want to control the return flow you'll need one on both lines.

Okay, Thanks!

 

[mrfixitpaul]

Okay, Thanks!

Whenever I put in the 'orifices' I put in both lines...not sure why...just the way it was done at our dealership??

 

[Chandler]

Whenever I put in the 'orifices' I put in both lines...not sure why...just the way it was done at our dealership??

Just to make sure I've got it right, is the top line on the auxillary hydraulics the flow going out and the bottom line the return flow?

 

[mrfixitpaul]

Just to make sure I've got it right, is the top line on the auxillary hydraulics the flow going out and the bottom line the return flow?

When you are using a grapple you'll be using flow in both directions, one way to open and tho other way to close. I can't remember which is the supply and which is return when using other attachments like a backhoe......the trigger does the same as holding the thumb switch to the right