CAT 10R-7569 High-Pressure Fuel Pump – Precision Flow Delivery with Advanced High-Pressure Sealing for C7/C9/C9.3 Common-Rail Systems
1. Product:10R-7569
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 most demanding engineering challenge is not flow generation-it is high-pressure containment. The pump must maintain a pressure of 1,600 bar within its internal chambers while allowing the plungers to move freely and the metering valve to respond rapidly. Any leakage past the plunger-barrel interface reduces the volumetric efficiency, while leakage past the seals can cause external fuel leaks that create safety hazards and increase the operating costs. The CAT 10R-7569 addresses this through an advanced sealing system that combines a multi-lip plunger seal with a precision-honed barrel, providing a consistent seal that maintains its integrity across the pump's service life. The result is a pump that delivers stable rail pressure with minimal internal and external leakage, reducing the fuel system operating costs and extending the service interval.
Plunger-Barrel Sealing – The Science of Leakage Control
The 10R-7569's plunger-barrel sealing system is engineered to maintain a consistent clearance while minimising internal leakage. Key design features include:
Multi-lip plunger seal: Provides a two-stage sealing action, with the primary lip maintaining the high-pressure seal and the secondary lip acting as a backup
Barrel finish: Precision-honed to Ra ≤ 0.04 µm, providing a smooth sealing surface that minimises leakage
Plunger coating: DLC (diamond-like carbon) with a hardness of 2,000 HV, providing a wear-resistant surface that maintains the seal geometry
Clearance: 0.002–0.004 mm (dynamically matched)
Internal leakage: ≤ 5% of total flow at rated pressure
External Sealing – Preventing Fuel Leaks and Safety Hazards
The 10R-7569 incorporates a robust external sealing system that prevents fuel leakage from the pump housing and connections. Key features include:
O-ring seals: High-temperature FKM (fluorocarbon) seals that resist fuel degradation and maintain their integrity up to 120°C
Threaded connections: Precision-machined threads with a sealant coating that prevents fuel seepage
Housing sealing: Metal-to-metal seal at the mounting flange, providing a leak-proof interface with the engine block
External leakage: Zero leakage under normal operating conditions