Essential Upper and Lower Guide Plates for Cross Head for Oilfield Mud Pumps Description: The crosshead guide plate, also known as the crosshead slide plate or guide plate, consists of an upper guide plate and a lower guide plate. It is a core wear-resistant component of the crosshead assembly at the power end of a three-cylinder mud pump. It provides a precision sliding track for the reciprocating motion of the crosshead, constrains the radial offset of the crosshead,