0445020253 Original CP3S3 High Pressure Common Rail Pump

The 0445020253 high pressure common rail fuel pump, also identified as 0 445 020 253, is a radial piston diesel injection pump designed for common rail fuel systems. The corresponding Doosan reference number is 400912-00277, giving buyers an additional OE number for part identification and replacement confirmation. Bo-sch's diesel cross-reference documentation directly associates Doosan 400912-00277 with 0 445 020 253.

The unit belongs to the CP3S3 pump family with the technical designation CR/CP3S3/L110/30-789S. The radial-piston architecture generates and supplies high-pressure diesel fuel to the common rail, allowing the engine management system to control injection accurately under different operating conditions.

Product Specifications

System Design

The CP3S3 is a common rail high-pressure pump, not a mechanical or unit-injector pump. Correct identification relies on the pump number rather than the engine family alone.

Typical Applications

Product Features

• CP3S3 common rail high pressure pump
• Radial piston pump construction
• Direct cross-reference with Doosan OE 400912-00277
• Designed for diesel common rail injection systems
• Suitable for selected DL08 engine configurations
• Common application reference for Doosan DX340 excavators
• Individual pump number verification supported before shipment

Important Order Confirmation

Before ordering, please provide at least one of the following:

1. Old pump number: 0445020253 / 0 445 020 253 / 400912-00277
2. Pump label or product photo
3. Engine model and serial number
4. Excavator model

This avoids confusion between different DL08 common rail systems.

Doosan DL08 Fuel System Note

Doosan DL08 spans several emission versions and more than one common rail fuel system. This page locks only the reliably confirmed relationship: 0445020253 / 0 445 020 253 / 400912-00277 → Doosan DL08 → DX340 → CP3S3 common rail pump. Other DL08 injectors, high-pressure pumps and common rail components are treated as related DL08 products only; they are not mandatory matched parts for 0445020253. Always confirm by the number stamped on the existing pump, the engine and the machine information.