Bosch 0460426369 / 3963951 CP3 High-Pressure Fuel Pump – The Flow-Stability Benchmark for Volvo, Ford & PSA Diesel Systems
1. Product: 0460426369 / 3963951
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 common rail diesel systems, the high-pressure pump's primary function is not merely to generate pressure but to maintain a stable flow rate across the engine's entire operating range – from idle to maximum power. The Bosch 0460426369, also identified as Cummins 3963951, is a CP3-generation radial-piston pump engineered to deliver a consistent fuel volume to the rail, with a displacement of 0.98 cc per revolution and a maximum output pressure of 1,600 bar (23,200 psi). This pump features a 3-plunger radial configuration with a 9.5 mm plunger diameter, providing a delivery rate of 420 L/h at 3,000 rpm – a specification that ensures the engine receives the fuel volumes required for sustained high-load operation in Volvo D5, Ford Duratorq, and PSA HDi applications. The defining metric of this CP3 pump is its pressure ripple suppression – a rail pressure deviation of less than 3% from nominal over the engine's operating range, achieved through a precisely machined cam plate and individually matched plunger clearances of 3–5 microns.
█ Application Coverage – European Diesel Platforms
The 0460426369 / 3963951 is a service replacement pump for the following applications:
Volvo – D5 (D5244T, D5244T4, D5244T5) in S60, V70, XC70, S80, XC90
Ford – 2.4L Duratorq (J9FA, J9FD, J9FE, J9FF) in Focus ST, Mondeo, Galaxy, S-Max
Peugeot/Citroën – 2.2L HDi (DW12) in 607, C5, C6, and 2.0L HDi variants
Land Rover – 2.4L TDV6 in Freelander 2
Jaguar – 2.2L Diesel in X-Type
The pump is a direct replacement for Bosch part numbers 0460426368, 0460426370, and Cummins part number 3963950. It is supplied as a complete pump assembly, including the housing, plungers, suction control valve (SCV), and delivery valves.
▐ Technical Specifications – Mechanical and Hydraulic Data
| Parameter | Specification |
|---|---|
| Pump Type | Radial-piston (CP3) |
| Plunger Configuration | 3-plunger |
| Plunger Diameter | 9.5 mm |
| Plunger Stroke | 6.5 mm |
| Displacement per Revolution | 0.98 cc |
| Maximum Rail Pressure | 1,600 bar (23,200 psi) |
| Delivery Rate @ 3,000 rpm | 420 L/h |
| Drive Speed Ratio | 1.2:1 (pump:engine) |
| Suction Control Valve | Normally-open, PWM-controlled |
| Pressure Ripple | ≤ 3% deviation |
| Housing Material | Aluminium alloy (die-cast) |
| Plunger Material | Case-carburised steel (62–64 HRC) |
| Drive Connection | Splined shaft (14-tooth) |
| Inlet Fitting | M14 × 1.5 |
| Outlet Fitting | M16 × 1.5 |
| Service Interval (with 5 µm filtration) | 150,000–200,000 km |
◆ Construction Details – CP3 Architecture and Flow Stability
→ 3-Plunger Radial Configuration: Three plungers positioned at 120° intervals provide a continuous, overlapping fuel flow that minimises pressure pulsations. This design contributes to the ≤3% pressure ripple specification.
→ Case-Carburised Plungers: The plungers are case-carburised to a surface hardness of 62–64 HRC with a case depth of 0.8–1.0 mm, providing wear resistance against abrasive particles while maintaining a tough core.
→ Suction Control Valve (SCV): The normally-open solenoid valve modulates the fuel flow entering the pumping chamber, responding to the ECU's rail pressure command in real time. The valve operates at a frequency of 200–400 Hz.
→ Internal Fuel Lubrication: The pump is lubricated by the fuel it pumps – requiring ultra-clean fuel to prevent plunger scoring and SCV sticking.