Hydraulic Pump Maintenance

Hydraulic Pump

Every piston pump is assembled from cylinder blocks, valve plates, and piston shoe subassemblies that have been checked and/or re-conditioned to exact tolerance

Every cylinder block has each bore diameter checked including its concentricity to ensure pump efficiency

Every cylinder block face is machine lap polished to 12 millionths of flatness and is surface treated to allow a thin layer of oil to exist between mated parts

Every valve plate is machine lap polished to 12 millionths of flatness

Every metering and timing notch on the plate is checked and any found out of tolerance are cut to meet specifications

The plate is surface treated to ensure no internal slippage

Every piston shoe subassembly diameter is matched with cylinder bore diameters to ensure efficiency within manufacturer's tolerances

Piston shoe height is checked on each shoe using a micrometer to ensure the component is within tolerance

Each pump is further tested to manufacturer's specification before it is released.