Bosch Rexroth A4VSO180 Hydraulic Piston Pump Repair Kit

The Bosch Rexroth A4VSO180 hydraulic piston pump repair kit is engineered for the maintenance and overhaul of A4VSO series size 180 axial piston variable displacement pumps used in open-circuit hydrostatic drives. The kit comprises critical wear components manufactured to meet or exceed OEM material specifications for high-pressure hydraulic applications. Key components typically include a cylinder block, valve plate, nine piston shoe assemblies with slippers, set plate, retainer plate, ball guide, shoe plate, thrust plate, and a full complement of sealing elements including O-rings, gaskets, and BABSL-type shaft seals rated for 300 MPa pressure resistance. Materials encompass high-strength cast iron or alloy steel for rotating group parts, bronze or steel-backed bearings, and HNBR/Viton/PTFE compounds for sealing elements compatible with mineral oil (HL, HLP) and HF fluids. The A4VSO180 pump features a nominal displacement of 180 cm³/rev, continuous operating pressure of 350 bar, and peak pressure of 400 bar. This repair kit restores volumetric efficiency and pressure capability for swashplate-design pumps with series 1x and 30 component series. Compatible control types include DR, DRG, DFR, DFR1, LR2, LR2D, LR2G, and EO2 configurations. Installation requires strict adherence to Rexroth service documentation for cleanliness, torque specifications, and hydraulic fluid cleanliness class NAS 1638 / ISO 4406 standards.