[77newell]

When both rear bags won't inflate it has to be something they have in common since they have separate leveling circuits, both when parked and on the road. One thing not mentioned yet is the possibility that there may be a one way valve between the wet tank and the tank supplying the leveling system. If that valve were to be stuck mostly closed it might produce the 60psi you are indicating. If a leak were to be dropping the pressure that low I suspect you would hear it readily and that your pump would have to run continuously. If neither of those are present I would be thinking restriction in the supply rather than looking for a leak.