CAT 375-2647 High-Pressure Fuel Pump – Advanced Metallurgy and Surface Engineering for Extended Service Life in C13/C15 Common-Rail Systems
1. Product:375-2647
2. Compatible Equipment: Diesel Fuel Injection Systems
3. Manufacturer: Aftermarket OEM Replacement
4. Condition: Brand New, Fully Tested
5. Origin: ABOSEDE Diesel
6. Shipping period: 3-5 business days
7. Payment terms: T/T, Western Union, PayPal
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Product Introduction
In the high-pressure fuel pump, the plunger-bore interface is the most critical wear pair-a microscopically controlled clearance that must maintain its integrity against abrasive particles, high contact stresses, and the corrosive by-products of combustion. When this interface wears, the internal leakage increases, the volumetric efficiency drops, and the pump can no longer maintain the rail pressure at high load. The CAT 375-2647 addresses this through advanced surface engineering-a combination of a diamond-like carbon (DLC) coating on the plungers and a plasma-nitrided barrel surface that reduces the friction coefficient by 40% and increases the wear resistance by 60%. The result is a pump that maintains its volumetric efficiency above 88% for over 8,000 hours-a 30% improvement over standard pumps, significantly extending the service interval in heavy-haul and mining applications.
Surface Engineering – The Science of Friction and Wear Reduction
The 375-2647's plungers are coated with a DLC (diamond-like carbon) layer applied via a plasma-assisted chemical vapour deposition (PACVD) process. This coating achieves a hardness of 2,000 HV and a friction coefficient of 0.08, providing exceptional resistance to the abrasive wear that increases the plunger-bore clearance. The barrel surface is plasma-nitrided to a case depth of 0.030 mm, creating a hard, wear-resistant layer that complements the DLC coating. The combination of these two surface treatments reduces the wear rate by 60% compared to standard nitride-hardened plungers, maintaining the plunger-bore clearance within 0.001 mm of its initial value after 6,000 hours.
Plunger Design – The Hydraulic Foundation of Performance
The 375-2647's plungers are manufactured from a high-speed steel (HSS) grade with a hardness of 62 HRC, providing a tough core that resists the high-contact stresses of the cam-plunger interface. The plunger surface is finished with a micro-polishing process that achieves a roughness of Ra ≤ 0.04 µm, reducing the friction and improving the sealing performance.