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Bosch High-pressure common-rail fuel injection pump high-pressure fuel pump 0445020609
Product Function and Troubleshooting Common Failures
1. This high-pressure fuel pump is driven directly by the engine's timing gears. It receives diesel fuel from the low-pressure supply pump and delivers it to the high-pressure common rail, where the engine control unit (ECU) regulates the fuel injectors for atomized injection.
2. Strict prevention of fuel contamination (the most critical failure mode): The internal components of the CP4 pump rely entirely on the diesel fuel itself for lubrication. If the vehicle is filled with substandard diesel, fuel containing excessive water, or straight water, the pump's plungers will instantly lose lubrication, leading to metal-on-metal wear and the generation of metal shavings. Once these shavings are produced, they circulate through the fuel lines, destroying the high-pressure injectors, common rail, and fuel tank, effectively rendering the entire fuel system unusable.
3. Failure to build high fuel pressure: If the metering valve sticks or the internal pump components suffer severe wear, the engine ECU will register error codes from the rail pressure sensor (e.g., low rail pressure or failure to start). Symptoms include excessively long cranking times, failure to start when the engine is hot, or sudden engine shutdown and speed limiting during heavy-load operations.
Maintenance and Assembly Specifications
1. Mandatory replacement with high-quality filter elements: Whenever the pump is replaced or the fuel system is cleaned, brand-new, high-precision diesel pre-filters (water-fuel separators) and fine filters must be installed simultaneously to block external contaminants.
2. Mandatory air purging before startup: After installing the new high-pressure pump, attempting to start the engine immediately is strictly prohibited (dry cranking can cause instant scoring and damage to the pump). The fuel lines must be thoroughly purged of air using the manual fuel transfer pump or the low-pressure electric pump; the engine should only be started once the high-pressure pump chamber is fully primed with diesel.
High-Frequency Wear Parts Table (Bosch 0445020609)
| Component Name | Bosch Original Part Number (PN) |
|---|---|
| Fuel Control Actuator | 1 462 C00 998 (1462C00998) |
| Pressure Regulator Valve | 1 467 C45 004 (1467C45004) |
| Front Shaft Seal | 1 460 C85 002 (1460C85002) |
| Internal Camshaft | 1 466 C05 058 (1466C05058) |
| Major Seals Gasket Kit | SE030030765 (Includes all critical O-rings) |
DETAILS
| DESCRIPTION |
igh-pressure common-rail fuel injection pump high-pressure fuel pump |
PART NUMBER | 0445020609 |
| WEIGHT | 5 kg | VOLUME | 355 mm × 254 mm × 254 mm |
| TRUCK MOLDE | BOSCH | QUALITY | Copy,High Copy, OEM,Original |
| MOQ | 1 | WARRANTY | 1 year |
| PAYMENT | TT/WESTEN UNION | SHIPMENT | by air/sea/railway |
| BRAND | SINOSACHS | PLACE OF ORIGIN | JINAN CITY,CHINA |
| STOCK | IN STOCK | APPLICABLE SITE | ENGINE |
| PACKAGE | Carton/Woodenbox | PORT OF LANDING | Qingdao Port,China |
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