Hydraulics too fast

[David M]

I mounted a PTO pump to boost the speed of my backhoe. Works great for all the boom circuits but the swing circuit is way too fast. So I put a restrictor in at the cylinders with a 3/32 hole. The swing now only has pretty much one speed and little "feel" with the lever since it starts moving (at one speed) as soon as the valve is cracked. If you push the lever much further the check valve is howling to dump the extra flow. It would be nice to move the lever in a more normal fashion rather than being so careful to just crack it. Any ideas? Thanks.

 

[Hugh MacKay]

David: I don't have much experience with a backhoe, however on several other applications when I wanted to slow a hydraulic function, I used larger bore hydraulic cylinders. It worked well on the applications I was using.

 

[Anonymous-0]

You may be able to put a restrictor valve on the cylinder ports. The valve that I am talking about is the type that you have to turn 20 or so times to get to a full shutoff condition. This may work.

 

[Walt Davies]

Increase the size of the restricter until it works like you want, it might take a few tries to get it correct but sooner or later you will find the correct size.
Walt

 

[Janicholson]

another good solution is to construct a differential for the supply to the swing cylinders. (if you have cylinders around it might be a good option. To slow it by 1/2, drive a small cylinder with a cylinder twice as large in piston area thus twice the fluid is needed to do the same task. JimN