Excavator CAT E365C E374D Main Hydraulic Pump Assembly Part Numbers: 266-7952, 222-8349, 259-3782 Purchasing and Installation Guidelines Verify OEM part number compatibility, including regulator and servo valve assembly Require hydraulic bench test report for pressure, flow, and case drain leakage For remanufactured units, confirm replacement of pistons, cylinder block, valve plate, slippers, bearings, and all seals Inspect pump housing for pores and cracks upon arrival