Hydraulic problems on a 460 D

[Boss Hog]

I have some thing sticking a valve most likely But I dont no which one. When you are moving the cylinder at the rear for the lift the engine speeds up or runs free when the cylinder stops the engine bogs down a bit. This should be just the opposite .
Anyone have any Ideas
David

[Jim Becker]

Are you talking about when the cylinder stops at the limit of travel or at any intermediate position? If only at the end, you probably have a linkage adjustment problem. If at intermediate points, your pressure control valve is probably the problem.

[Boss Hog]

Jim, thanks for the fast response It is doing it all the time no matter where the cylinder is at. The fluid is getting extremly hot
The floor pan burned my foot it got so hot. I can't here very well and am sure the pump is dead heading. At lest my brother says it it making a noise when the lift is not in motion The engine does die down a bit when the cylinder is not moving. and speeds up when the cylinder is moving. Where is the pressure control vale located at.
Thanks
David

[smigelski]

question, is there any water in the hydraulic fluid?

[Paul_NJ]

Best resource you'll ever find is this article:

http://www.oldoakfarmalls.com/Hydraulics%2060%20Series.htm

[Boss Hog]

Paul Thanks a thousand times that is a great sight I do believe I will be able to get this thank fixed
David

[Paul_NJ]

David

Here is the valve manifold from my 340U. The valve block on the far left is the pressure control valve, next one is the TeleDepth valve to the rear hitch, and the two on the right are the external hydraulic control valves. Your's may look a little different, but the units are the same.



If you decide to go into the pressure control valve, look for the Blue Ribbon Manual GSS-1278, Valves and Systems. The I&T manual has similar info.

[Paul_NJ]

Let's try that again:

Also, you can usually find that Blue Ribbon Hydraulics Manual on eBay.

[Boss Hog]

I pulled the valve off today. I think I have found the problem


It is right dirty, I am going to order the parts tomorrow
Thanks Again for the help
David

[Don McCombs]

I see the problem, too. Your camera is out of focus.

[Bigdog]

The camera is in focus - his valve is out of focus!

[Boss Hog]

I see the problem, too. Your camera is out of focus.

Don, I was shaking like a dog passing persimmon seeds I couldnt get the camera to catch up with the strainer
My helper had done run off hard for me to keep a camera steady

[Paul_NJ]

David

Glad you discovered that crushed screen. Mine looked much the same. More than likely the orifice in the plug base is also clogged or restricted. If that is plugged, the regulator can't drop pressure and the safety valve opens instead.

Sit down before they tell you the price . . . it's about $50. I'd advise changing all the o-rings while you're in there, and flush the passageways to ensure no additional crud and contamination is lodged somewhere.

Paul