2004 Kubota M9000 Hydraulic Issue

[Steven Sykes]

I had something that hit the hydraulic pump on my tractor. It caused the pump to stop working. I replaced the pump and the hydraulics were working, until I hit the button on my third function joystick. Then everything stopped working again. I did find a few small metal shavings in the hydraulic filter. Some are saying it was a "Cheap" pump. Some are saying could have been too much pressure on a "cheap" pump. Some are saying could have been a metal shaving that damaged the new pump. Could really use some good advice on this. Thank you.
Steven

 

[TheOldHokie]

I had something that hit the hydraulic pump on my tractor. It caused the pump to stop working. I replaced the pump and the hydraulics were working, until I hit the button on my third function joystick. Then everything stopped working again. I did find a few small metal shavings in the hydraulic filter. Some are saying it was a "Cheap" pump. Some are saying could have been too much pressure on a "cheap" pump. Some are saying could have been a metal shaving that damaged the new pump. Could really use some good advice on this. Thank you.
Steven

Since you are asking for wild guesses my WAG is the third function spool is hung up on some trash left in the system and is blocking the pump (neutral) circuit.

Does the loader bucket will still curl and dump? Have you checked for flow and pressure at the loader valve inlet?

Dan

 

[Steven Sykes]

Since you are asking for wild guesses my WAG is the third function spool is hung up on some trash left in the system and is blocking the pump (neutral) circuit.

Does the loader bucket will still curl and dump? Have you checked for flow and pressure at the loader valve inlet?

Dan

No. When I hit the button on the third function, it was not attached to the grapple bucket. When I hit the button, everything hydraulic stopped working. No movement in the bucket or the back.

 

[TheOldHokie]

No. When I hit the button on the third function, it was not attached to the grapple bucket. When I hit the button, everything hydraulic stopped working. No movement in the bucket or the back.

When you hit the button with nothing attached you immediatly block the pump circuit and cut off all pump flow until that valve returns to neutral. Like I said - I think your 3rd function valve is stuck.

Dan

 

[Steven Sykes]

When you hit the button with nothing attached you immediatly block the pump circuit and cut off all pump flow until that valve returns to neutral. Like I said - I think your 3rd function valve is stuck.

Dan

How do I return the valve to neutral an get it unstuck?

Steven

 

[TheOldHokie]

How do I return the valve to neutral an get it unstuck?

Steven

First you need to confirm it is stuck. If it is stuck it could be as simple as a bad pushbutton switch. Try pulling the fuse or unplugging the harness to see what that does if annything.

I have no idea what third function you have on the tractor and you really have not done any real troubleshooting of the hydraulic system so this is purely speculstive.

Do you know where the 3rd functuon valve is located and is it an aftermarket addon or OEM? Cab or open station tractor? Any rear remote valves ?

Dan