Your water pump, if stock, is undoubtedly a PAR diaphragm pump. They leaked. They are (were?) re-build-able, but were I to do it today, I'd just replace it with a modern pump.
Roger
__________________ AIR 2053 “A generation which ignores history has no past and no future.” Robert Heinlein 1994 Airstream B190 & 2006 Bigfoot 25B25RQ
Avion used a spring suspension until the mid 60's. Avion and Mor Ryde developed the rubber spring or as Avion called it Smooth Glide suspension system. This was standard on the Avion until 1978 when Fleetwood changed the suspension. The split axle set-up was used until the 1989-90 year when Fleetwood installed AL-KO Kober axles. These are torsion axles similiar in type to the Henschen axles that are on almost all Airstream trailers today.
Thanks Kevin,
I knew ours had the leaf springs, and a larger one that my Dad had did also, but I did not know they ever had the rubber springs. I remember ours was a 23', but other than it being 80's, I don't remember the actual year.