This kit is for TRW/Ross made HPS52 Series gears that have a HPS522998 or HPS522999 main housing cast numbers and internal 3 bolt directional valves. To see a list of the contents and a typical gear they are used in, click here.
Use this kit to service the following part numbers:
Allis Chalmers # 4704703, 4739404
Caterpillar # 0035431, 0637867
Hyster # 110299, 110491A, 112378A, 113344A, 133776, 133779
Yale # 050032000, 050032100
Casting numbers on main housing: HPS522998, HPS522999