MSparts hydraulic plunger piston pump marked with part numbers 8J0498 and 8J6155 serves as reliable replacement construction machinery parts engineered to match Caterpillar motor grader models 120G, 12G, 130G, 140G and 160G, compatible with 3304 and 3306 series engines. This precision-machined piston pump undergoes strict production inspections to deliver stable hydraulic pressure output during heavy-duty grading and earthmoving operations, resisting wear, leakage and pressure fluctuations under long-hour working loads. Crafted with high-strength alloy plunger and piston components, it seamlessly replaces worn original hydraulic pump assemblies without complicated modification, ensuring consistent power transfer for grader hydraulic systems. Each MSparts hydraulic plunger piston pump adheres to OEM dimensional standards, fitting perfectly on designated Caterpillar motor graders powered by 3304 and 3306 engines, extending equipment service life and lowering downtime costs for construction fleets and machinery repair workshops. Rigorous quality testing confirms dependable performance in rugged job site environments, making this 8J0498 8J6155 hydraulic plunger piston pump a cost-effective aftermarket construction machinery part for Caterpillar motor grader maintenance and overhaul tasks.