Deere 6420 rear remote SCV leak down

[CatKC]

I have a 200 Deere 6420 with 3 remote 300 series SCV's. After raising the wing using #2 SCV of my brush cutter OR my disc the wing will slowly go back down. I swapped hoses and it stays with #2 SCV. The hose connection is NOT leaking.
Unless someone has a better solution I figure I'll need to -rebuild- an SCV, but that appears to be a very difficult job.

 

[CatKC]

I need to rephrase my question.
It is a 2006 Deere 6420.
Anyone have an idea of what would cause the leak.
Has anyone rebuilt a rear SCV ? It seems to have a LOT of springs and seals, any advice would be appreciated.

ALSO, if I remove a SCV will I have to bleed the air out of the SCV block to get it to work again ?

 

[Volvomad]

Is it neutralising propperly

 

[sandy]

straight forward to rebuild
just don't lose the load sense check valves / penny washers between the scvs
they can drop down when you loosen the scv bolts and remove the scvs

 

[CatKC]

Is it neutralising propperly

Every position seems to function correctly. It's just when I put it in 'neutral?'. the wing gradually goes down. I have to apply 'slight' UP pressure to keep it from dropping.

 

[CatKC]

straight forward to rebuild
just don't lose the load sense check valves / penny washers between the scvs
they can drop down when you loosen the scv bolts and remove the scvs

Does everything come out thru the TOP?
I was somewhat concerned also about loosing the 4? ball bearings.

After reinstalling the SVC's do they need to be 'bled' to remove the air for them to function again ?