Itís a very tight fit and thatís normal. Put some axle grease on the seals to hold them in place on the flange. Then spread the opening and slide the valve in place. You can rotate the valve to make sure itís seated and the seals arenít pinched. It isnít easy, but itís the way we do it here in the shop, a second set of hands can make all the difference.
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.