Leaking multi-coupler on JD 9770 combine

[deere1742]

Is there anyway to fix the multi-coupler header hook-up on a 9770 combine without just replacing the valves.  We have tried replacing the O-rings on tyhe outside barrel butn that has not proven successful.  A little oil seepage I can live with,but having to add oil frequently is a bit much!!  Thanks for any suggestions.

[nitefarm]

We tried replacing the o-rings but had no luck, the parts guy tried to tell us,but we are a little hard headed.