David Brown loader valve leaking

[blakey]

I have a David Brown 995 with an LS9 loader that has a slow leak that is getting worse. There appears to be a pin of some sort between the hose connections (see attached pic) and it is leaking around this pin, even when the levers are not being operated. Does anyone recognize this spool valve or know what it might take to fix it? Thanks in advance for any info.

 

[blakey]

Just an update - I got the "pin" out which is part of the check valve and it looks like it needs an o-ring.