Here goes my first attempt to reply--couldn't keep quiet on this topic.
Driveline: Cummins ISC 330 w/Allison 6 Speed
Miles: 39000
Year: 2001
Breakdown Description: Cruising North on I-95 in Virginia when I lost power steering and a little later engine temp. began to rise. We limped into gas station where hydrolic fluid was ok as was drive belts. Called Spartan who advises hydrolic punp failure or contaminated fluid. Got to campground with aid of roadside assistance and repaired by roadside mechanic in only 5 days.
Symptoms: Sudden failure of power steering with extreem difficulty steering and higher than normal engine temp.
Effect: noted above
Cause: Sheered splines on drive shaft of hydrolic pump which mounts on rear othe air compressor which had a bad bearing.
Outcome: Replaced hydraulic pump, air compressor and related filters and fluids.