Excavator Pump Parts Ap2D36 Ball Guide K9009740 For Main Pump Parts It acts as the mounting base upon which the swash plate is installed. The swash plate is fitted to the support assembly, which swings about the pivot shaft to regulate the swash plate tilt angle. Complete assembly routing: Drive Shaft → Cylinder Block → Ball‑Guide → Set‑Plate → Piston Shoe → Swash Plate → Support Ⅱ. Core Functions Load-bearing & mounting: Clamps the swash plate and withstands heavy thrust