JD 7810 SCV problem

[Zetor]

Hi I have a 7810 autoquad and one of the scv’s is very slow however it does speed up a little if I use another SCV or stamp on the brakes.
I’ve had the flow control apart and swapped it into another SCV but the problem stays with the faulty valve.
Any help would be appreciated
Thanks

 

[Slug Herder]

Our 7800 had 300 series scvs seem to remember part of the scv came loose inside and needed a clean and dab of loctite.