Linear drive assembly

A power end assembly comprising:

• a crosshead section comprising at least one crosshead guide having an inwardly-facing wall;
• a linear drive assembly, comprising:
• a crosshead configured to be installed within the at least one crosshead guide, the crosshead comprising upper and lower surfaces;
• and
• a pair of wear plates, each wear plate removably attached to a corresponding one of the upper and lower surface of the crosshead, each wear plate having an outer surface and a front edge and comprising:
• at least one lubricant groove formed in the outer surface of the wear plate, the at least one lubricant groove in fluid communication with lubricant ports formed in the crosshead;
• and
• at least one plate wear groove formed in the outer surface of the wear plate, the plate wear groove distinct from the at least one lubricant groove and not in fluid communication with any lubricant port formed in the crosshead;
• in which the at least one plate wear groove opens on the front edge of the wear plate;
• in which the linear drive assembly is installed within the at least one crosshead guide such that the front edge of the at least one wear plate is observable when installed within the at least one crosshead guide;
• in which the at least one crosshead guide further comprises:
• a crosshead bore sized to receive the linear drive assembly;
• and
• a guide wear groove formed in the inwardly-facing wall of the at least one crosshead guide surrounding the crosshead bore and observable when the linear drive assembly is installed within the at least one crosshead guide.