The bay star is easy to bleed, and there are videos on line for that. The hydraulic fluid is as much as $33 a quart. I get the Phillips 66 X/C 5606A Aviation Hydaulic Fluid - 1 gal Bottle for $55 (was 46 a couple of years ago) which is the same mil specs hydraulic oil. Do not use ATF or Brake fluid. (Yes I know that some have, but it may damage seals, and it is cheaper in the long run to use the proper fluid.
If it is the mechanical push pull cable, just get a new set (measure the length of tube). Be sure and get the "non feedback" unit.