New member / L2550 problem

[motorheadjoe]

recently picked up an older L2550 that came with a 3 point snow blower with an aux hydraulic control that plumed in under the seat, I removed the blower and the aux control and inserted two pipe plugs into the manifold and closed the valve. I now have an issue that the 3 point will not lift at all, you can raise the 3 point arms by hand and they will fall with out any resistance. I did try it with the valve under the seat being open or closed but did not have any luck. The hydraulic fluid seems to be clean and full I am not sure if I need to hook something back up?. Any help would be appreciated. Thanks

 

[Grandad4]

I'm no expert, but many hydraulic attachments are set up so you need to jumper a line across the two hyd connection points when you remove the attachment instead of capping them. Kubota uses an "open center" type of hyd circuit that constantly circulates hyd fluid to each hydraulic function, returning the flow to the reservoir. By closing off the lines, you're preventing the return flow.

That's my simple-minded understanding of it... there are experts who can explain better (or correct whatever I may have mis-explained ).

 

[Tooljunkie]

It would be like a series circuit,remove one component and everything stops. Would have been better to leave valve and plug it where hyd hoses connect.

 

[North Idaho Wolfman]

DO NOT run it like that you'll blow the seals out of the pump if you haven't already (check and keep an eye on the engine oil as it will rise if the seal is blown)
As others have said the system is an open loop system it must flow fluid all the time, either put a loop of hose or the valve back in the system to make it work right.
You also can get a cap that has the loop built into it, but do to it's age that would be a tough find.

 

[motorheadjoe]

DO NOT run it like that you'll blow the seals out of the pump if you haven't already (check and keep an eye on the engine oil as it will rise if the seal is blown)
As others have said the system is an open loop system it must flow fluid all the time, either put a loop of hose or the valve back in the system to make it work right.
You also can get a cap that has the loop built into it, but do to it's age that would be a tough find.

Put a loop into it today and it worked as it should, thanks for the help and have a happy 4th!