Check the fluid level the pump is right in the front of the coach sounds like out of fluid turn engine off to hear pump run might have a bad hose or seal leaking on one of the jacks just don't run pump if low on oil your going to have problems if u buy a new moter home and spend big bucks a guy i know bought a brand new barth regency detroit diesel I think 8.3 liter? With a torsion. Bar suspension and it had air over hydrolic breaks it was scary stopping or trying to. when a semi passed you this thing was all over the road and he paid over 150k in the 1990s other than that it was a nice coach Lol any rv u buy I don't care what it is they all need repair Evan a new one lol
