CAT 2641A313 High-Pressure Fuel Pump – Precision Flow Delivery with Enhanced Contamination Tolerance for C7/C9/C9.3 Common-Rail Systems
1. Product:2641A313
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 common-rail fuel system, the high-pressure pump is the most sensitive component to fuel contamination. The plunger-barrel clearances are measured in microns (0.002–0.004 mm), and a single abrasive particle larger than the clearance can score the surfaces, permanently increasing the internal leakage and reducing the volumetric efficiency. While fuel filters are designed to remove particles down to 2–5 microns, no filter is perfect, and contaminants inevitably enter the pump over time. The CAT 2641A313 addresses this through an enhanced contamination tolerance design that combines a hardened plunger surface with a self-cleaning barrel geometry, allowing the pump to maintain its volumetric efficiency for a longer period. The result is a pump that can tolerate higher levels of contamination without a significant loss of performance, extending the service life in applications where fuel cleanliness is difficult to maintain.
Plunger-Barrel Design – The Science of Contamination Resistance
The 2641A313's plunger-barrel interface is engineered to resist the abrasive effects of particulate contamination. Key design features include:
Plunger coating: DLC (diamond-like carbon) with a hardness of 2,000 HV, providing a wear-resistant surface that resists scoring
Barrel geometry: Self-cleaning design with a tapered inlet that guides particles away from the sealing surface
Clearance: 0.002–0.004 mm (dynamically matched)
Contamination tolerance: Maintains volumetric efficiency above 88% with fuel cleanliness down to ISO 18/16/13
Flow Stability – The Foundation of Consistent Injection
The 2641A313 uses a cam-driven radial three-plunger design with plungers spaced at 120° intervals, providing overlapping pressure strokes that minimise the flow interruption between plunger events. The flow ripple is measured at 3.8% at full load-a 40% improvement over two-plunger designs. The pump's volumetric efficiency is rated at 91% when new, and the contamination-tolerant design ensures that it remains above 88% for over 6,000 hours under typical operating conditions.