Not really related to the lube issue, but I found mine was very hard to access between the wheels, so I added a length of hose to the spigot, ran it to a second tap which I installed on a new bracket just ahead of the lead wheel. So now I leave the original tap on the open position.
The only slight concern I have is that the new valve is a bit more vulnerable to damage from road debris, but if it gets knocked off, all I lose is water plus a $4 valve!
It is much easier to get to!
Brian & Connie Mitchell
2005 Classic 30'
Hensley Arrow / Centramatics
2008 GMC Sierra SLT 2500HD,4x4,Crew Cab, Diesel, Leer cap.