original 4P9830 Diesel Fuel Injection Pump Plunger Element Barrel for 3304 3306 Diesel Engine Replacement for OEM 4P-9830 1W6541 1W-6541 9H5797 6N7527 7W5929 original new injector

Engineered for uncompromising performance in heavy-duty diesel fuel systems, the 4P-9830 Injector Plunger is a precision-machined internal component designed to restore and sustain optimal injection pressure in demanding industrial engines. Cross-referenced with OE numbers 4P-9830, H4P9830, M-4P9830, 103-2961, and 1W-6541, this plunger delivers exact fitment for engine platforms including 3306B, 3306C, 3406B, 3406C, and R1300 series power units, as well as SR4 generator engines and 815B/F compactor applications.

Manufactured from premium-grade high-strength alloy steel with a 10.5 mm diameter, each plunger undergoes advanced vacuum heat treatment, precision grinding, mirror finishing, and micron-level lapping to achieve OEM hardness and exact tolerances. High-precision ground surfaces ensure consistent injection performance, reduced internal leakage, and extended service life under continuous load. The plunger is widely deployed across excavators, wheel loaders, bulldozers, motor graders, soil compactors, mining trucks, diesel gensets, and marine industrial units, supporting global construction, mining, power generation, agriculture, forestry, and offshore markets.

For optimal installation, work in a clean, dust-free environment, verify pump bore condition, lubricate the plunger with clean diesel, and ensure correct orientation with smooth free travel before calibrating the injection pump. Routine maintenance—including clean fuel usage, filter servicing, and emissions monitoring—maximizes durability. Backed by a 12-month warranty and global OEM support, this component is a reliable choice for professional fleets and MRO buyers.