John Deere hydrostatic tractor 410 loader scv valve

[fleecer]

I am new to this list so bare with me.

I have owned this tractor since new in 1998. aprox 650 hrs on it. Up untill this year, I had never used the float position on the loader. To tell the truth I never new what it was.

When I tried it, it seemed to work fine. The next day I used it again, when I tried to dump the bucket, it would barely tip forward. I have removed the scv valve to clean and inspect it before replacing the hydraulic fluid. The valve spools are spotless and the end springs are clean w/no rust or dirt.

When this happened, the bucket would raise and lower with normal engine sound but would sound a little like a drag on the engine when the scv was in the neutral position. Is it possible that the spool could be stuck in a partial float position?

I retired from the auto repair business after 44 years so I understand hydraulics, just not tractors. The valve is still apart as I think I am not seeing the problem. As a side note, I have an scv apart from a Kabota that had a similar symptom that turned out to have a corroded housing on the end of the spool.
Any help would be much appreciated. Ray

 

[oldnslo]

if raises and lowers properly it is not stuck in float.
Possible one of the quick disconnects on the curl circuit was not fully connected causing the tilt to not work.

 

[RNeumann]

How about the the cable that is controlling the valve? I’m guessing jamming the lever and cable into float did something to the cable and or adjustment.

Just my SWAG!

 

[fleecer]

Thanks for the reply. I came to the same conclusion before I took the scv off but I was going to replace the fluid and filter anyway as it was time to do the maintenance. I had planned to remove and clean the scv so I had the fluid and o rings ready. As I was thinking back to when the problem happened, I think that I might have created the problem by not pulling the joystick back far enough to take the spool out of the float position. I am not sure if it is possible. I have checked all of the hydraulic lines and hoses for kinks and dents and have found none, so I will put everything back together and cross my fingers.
Thanks again Ray