Recent content by Ol'MacDonald

Thank you TheOldHokie. In simple terms, the extra bends, turns, and twists were removed from the circuits. The additional flow losses would translate to pressure on the tank side. There are two spools for the loader controls: One spool for the loader lift arms and the second for the curl...

I recall that the 3rd function is off the curl and dump function circuit of the loader. The issues also occurred when there was little or no load on this part of the circuit due to empty grapple. This explains why the grapple be curled back while closing the jaw. Full flow of the hydraulic pump...

Pilot pressure is ported to the end off the spool to assist the displacement, controlled by the solenoid. The differential pressure displaces the spool against the spring. If the fluid at the end of the spool cannot vent to tank, due to back pressure, the spool remains off center.

From what I understand, it is the main relief valve. I am not aware of a relief in the third function block although, to be honest, I've never disassembled one. I understand that 3rd function is a pretty simple setup with a spring centered, solenoid actuated spool that is displaced by pilot...

The issue with the third function was resolved. At the time of the original post, the tractor was at the dealer for investigation and repairs. They were persistent and looked at every aspect of the system (pressure, flow, connections, etc.) to make sure they were missing nothing. Kubota service...

This is a wonderful attachment! I am glad you are able to enjoy your tractor.(y) There would be challenges fitting this arrangements to the complicated geometry of a tractor and loader but I think you have done well with this. The system is operated manually by the operator/passenger so this...

It appears that the large pully and shaft are cantilevered off the two pillow blocks (bearing assemblies.) There is no need to remove the bearings for the belt removal. I would take a long rag, something t-shirt sized but not too thick, loop it through the belt, hold with both hands, and gently...

It is easy to test without the grapple. Everything about the hydraulics is rated for beyond operating pressure. The issue seems to occur when the cylinder extends or retracts fully and causes the pressure to raise to relief pressure, ie loading the pump in a condition of zero flow to the grapple...

Hi Dave, You have put a lot of time on this, THANK YOU! What a great forum. I wonder, is there is a difference between the Landpride 3rd function and the Kubota 3rd function valve kits? I understand that there are two separate product lines of 3rd function diverter kits, Landpride and Kubota...

Hi Dave The 3RD function valve is an L2265 for the LA805 loader and the BH92 backhoe. The loader and backhoe were installed at time of purchase. Nick

Hi Dave_eng. Thanks for the reply. 3PH is acting normally in the raised position. I'm clearing trees so there is a chipper on the back and I'm using the grapple to move the logs. I do not have much opportunity to operate the grapple and the 3PH at the same time. I haven't noticed any issues with...

I have an L3560 ( about 150 hrs) with the Kubota/Landpride 3rd function kit installed by the dealer. When operating the grapple, I notice what I consider to be unusual operation of the hydraulics. I depress the switch to fully open the grapple and the pump loads up and dumps over the relief...