Does this service manual help http://www.powergearus.com/documents...ideout_Sys.pdf
Where exactly is the leak, at the threads or in the actual "rubber" hose? If the threads are leaking, a small tightening might stop the leak.
If the hose has a hole, you are correct; replacement is your only option. Did you locate both ends of the leaking hose? If you did, tie a small rope securely to one end before pulling the hose out. This leaves the rope to pull a new hose into place.
FWIW, an owners manual would not contain diagrams of hose routing.
2000 Winnebago Ultimate Freedom USQ40JD
, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert theConstitution. "Abraham Lincoln"