Cummins engine auto parts Fuel Injector Platen C4974970

Built as a critical component for securing fuel injectors in the cylinder head, this platen is crafted from heat-treated 4140 alloy steel—renowned for its exceptional strength and rigidity. The material undergoes quenching and tempering treatment, achieving a tensile strength of 950MPa and Brinell hardness of HB 280-320, enabling it to withstand a clamping load of 8000N without deformation. This load capacity is 30% higher than standard carbon steel platens, ensuring the injector remains firmly seated even under the high-vibration conditions of construction machinery. The steel’s fine-grain structure also enhances impact resistance, preventing cracking from accidental tool contact during maintenance

Engineered to deliver consistent clamping force across the injector’s top surface, the C4974970 platen features ultra-precision machining. The injector-contacting surface is ground to a roughness of Ra ≤0.2μm and a flatness of ≤0.02mm, eliminating gaps that cause uneven load distribution and injector misalignment. The four mounting holes are CNC-drilled with a positional tolerance of ±0.05mm, ensuring perfect alignment with the cylinder head’s threaded holes and preventing cross-threading during installation. A chamfered edge (1.5×45°) on the hole openings reduces stress concentration, while the platen’s symmetric design ensures balanced force transmission—critical for maintaining the injector’s spray pattern and injection timing accuracy

Optimized to endure the harsh conditions of the engine compartment, the platen exhibits exceptional corrosion and wear resistance. It undergoes a three-step surface treatment: phosphating for rust priming, electrophoretic coating (20μm thickness) for a corrosion barrier, and a final bake-on enamel finish (15μm thickness) that withstands 150℃ continuous temperatures. This coating system resists corrosion from fuel vapors, engine oil, and road salt, passing 1500-hour neutral salt spray testing (ASTM B117) with no rust or peeling. The injector-contacting surface is also treated with a dry lubricant (molybdenum disulfide), reducing wear during injector removal and reinstallation—extending the platen’s service life to ≥250,000km

The C4974970 platen is designed for efficient installation and long-term cost savings. Its lightweight (120g) and compact design allows easy access in tight engine compartments, while the pre-drilled mounting holes accept standard Cummins OE bolts (M8×20), eliminating the need for specialized hardware. A technician can complete replacement in 15 minutes per injector, reducing labor costs by 30% compared to aftermarket platens with poor fit. By ensuring secure injector mounting, it prevents injector movement that causes fuel leaks (repair costs up to $500) and cylinder head damage (costing $2,000+). As a genuine Cummins part, it guarantees compatibility, and its 2-year/200,000km warranty minimizes unplanned downtime for fleet and construction equipment operators