Hello all I have a 1986 Mauldin 3-5 roller with hydraulic issue. I've tried contacting Mauldin and got no help. I have figured out I have a sperry vickers pump or hydrostatic variable transmission pump. Tried to contact vickers was told they can't help. So seems like hydraulic system is cavitating. Checked all fitting and line tight replaced all filters and fluid topped. It will prime for 5 seconds then go out and just keeps doing it had it good to 10 mins then just keeps cycling. I cant tell which is suction whats return I think I have idea but need conformation. I cant find numbers on pump. So attached is pics of machine and pump any Info would be great thanks.
I figured it out new filter was not allowing fluid to get by who would have thought. Uh well carry on.