Bulldozer Komatsu D51EX-22 D51PX-22 D51EX-24 D52PX-24 Hydraulic Pump Main Pump Piston Pump 720-2L-00020 720-2L-00030 720-2L-00021 High-performance hydraulic main pump designed specifically for Komatsu D51EX-22 and D51PX-22 bulldozer models. This piston pump ensures reliable operation and optimal hydraulic system performance. Part Identification Compatible Models Komatsu D51EX-22, D51PX-22, D51EX-24, D52PX-24 Part Numbers 720-2L-00020, 720-2L-00030, 720-2L-00021 Common Faults