Ya I'm in need of a cover for one of my Atwoods. There's a set of bevel gears on amazon for $5,450. I have no appreciation/understanding of a company buying another then abandoning completely any support-
One older thread on hyd jacks...
https://www.rv.net/forum/index.cfm/fuseaction/thread/tid/26408204.cfm
Apparently jacks filled while retracted, red ATF fluid.
Reico titian has downloadable instructions if owner doesn't have. The owners manual outlines priming if jack 'stuck'. The other, maintenance manual, for rebuilding.
http://www.riecotitan.com/instructions.php