Excavator Spare Parts A10VO71 Swash Plate R910947804 Excavator Pump Parts The swash plate is a core built‑in component of excavator main hydraulic pumps. It maintains static status during cylinder‑block rotation, and piston shoes perform sliding motion on its surface. Functions Piston shoes fit against the swash‑plate working face. Driven by cylinder‑block rotation, pistons obtain reciprocating linear motion converted from rotary motion by swash‑plate inclination, thus