OEM 1733381 CAT320C 320C 320CL Hydraulic Pump Excavator Parts SBS120 Main Pump 173-3381

Product Name: Main Hydraulic Pump Assembly

Part Numbers: 173-3381, 1733381

Model: SBS120 (variable displacement axial piston pump, Caterpillar-designed)

Applicable Models:

Caterpillar 320C excavator (operating weight: ~20,500 kg; net power: 103 kW / 138 hp)

Caterpillar 320CL excavator (long-reach variant, operating weight: ~21,800 kg)

Type: Dual-section variable displacement axial piston pump (split-flow design for multi-function control)