Chatter Hyd. Top Link

[Reg]

Side arguments aside;

Cylinders SOMETIMES do that if there is a side load on the rod.
Check for alignment and any forces that might be tending to BEND the rod.
Tight/stiff ball ends or pins could be one/some of these.

Back to side arguments; Symptoms sometimes reduce due to some form of compensating wear, or circulation of lube - neither of which can reasonably be considered "fixing itself".
I am aware of designs that compensate/adjust for wear, but in THIS context that is an irrelevant rat hole.

 

[jinman]

Thanks again for all the help.

In the process of elimination I lightly greased all of the pins to try and see if that might help and I also cycled repeatedly at different angles. I was able to alleviate some of the chatter some of the time. By just barely opening the valve and extending as slow as I possibly could, the cylinder would extend fully chatter free with the Box Blade. Other times it would start immediately, yet other times would start at approximately 50% extension. It is still more apparent with the heavier attachments, although can be quite noticeable with the LRake.

Would it be worth switching the hyd. lines to 1/4 inch? Or just deal with it. As it does not seem to be hurting anything.

Thanks again.

JimBo

I'd be tempted to try a thin coating of oil on the hydraulic ram to see if that temporarily stopped the chatter. I'd also reverse the hydraulic connections at your quick connects or use a second remote if you have one. It is a very remote chance, but it might be interaction between your remote valve and the DPOCV. And when I say "remote chance" I mean don't hold your breath.

I believe you could achieve the same result as 1/4" hoses by installing inline 0.030" orifices if you can find them. Some tractor dealerships have them and some do not. They would be about $5 each and something you will like even if you decide to go to 1/4" hose. Some people even put an inline flow control needle valve so they can have the ultimate control for fine position adjustments.

 

[PAB_OH]

My DPOCV's chatter when I'm extending VERY slowly (i.e. fine adjustments) AND the RPM's are low. I do have 3/8" lines too.

Other than that very specific scenario, I don't ever get chatter. I don't think this helps clear anything up, just sharing another viewpoint.

 

[Bob_Young]

I think the radman has the answer. The weight of the implement is pulling/pushing fluid through the system faster the the check valve can handle.

I've had the same thing on my CCM toplink since new. If the implement's off the ground when I extend, I get a heckuva racket. Lower the implement to the ground and it extends silently. I've stopped worrying about it and just lower the implement when I hear the noise. I have the large hoses; maybe small hoses or a flow restrictor would help.

Haven't noticed any reduction of noise with age, but then I don't use the hyd. toplink that much. Usually the OEM toplink is on the tractor.
Bob

 

[Jim Ronquest]

This seems fairly common, or at least I am not the only one that has the same issue.

I will try .030 orifices when I find them and will post up how it works out. They should not be hard to find around here.

Thanks again for all of the responses.

Jimbo