X6260244 / 0445020283 / 0445020282 Bosch Common Rail Diesel Injection Pump

This high-pressure common rail pump is the genuine Bosch unit specified for Baudouin and Weichai Power diesel engines, carrying the OEM reference X6260244 alongside Bosch part numbers 0445020282 and 0445020283. For workshops servicing marine auxiliary engines, generator sets, or heavy industrial power units, this pump delivers factory-calibrated rail pressure and metering accuracy that aftermarket remanufactured units frequently fail to replicate. Each unit arrives in Bosch original packaging with a 24-month unlimited-mileage warranty, making it a commercially safe choice for repair businesses that cannot afford comebacks.

This pump serves two distinct customer segments that occasionally overlap: Baudouin marine propulsion and auxiliary engines, and Weichai Power industrial diesel platforms. Baudouin applications typically involve fishing vessels, inland workboats, and stationary generator sets where sudden rail pressure loss means lost revenue or compromised safety. On the Weichai Power side, the X6260244 reference appears in heavy equipment and power generation contexts, often in regions where fuel quality varies dramatically between refueling points. Shantui chassis applications also reference this OEM number, further widening the installed base beyond the two primary engine brands. Repair shops that stock one or two units of this pump gain coverage across a surprisingly broad slice of the Chinese-origin heavy diesel aftermarket-a segment that European and North American independents are increasingly asked to service.

Before the new pump goes in, the fuel system cleanliness protocol matters more than the torque sequence. The CPN5's plunger-to-barrel clearances are measured in microns; a single particle of debris from a contaminated tank or a neglected filter can score the plunger surface and produce a low-pressure or no-start condition within weeks. Flush the high-pressure lines, replace the fuel filter and water separator element, and inspect the tank for microbial sludge if the vehicle has sat idle. Mounting bolt torque follows the standard M8/M10 flange ranges, but tighten in stages and crosswise to seat the flange evenly-uneven clamping distorts the pump housing and accelerates internal wear. Most critically, never reuse the old high-pressure pipe unions; the compression collars deform on first torque and a reused union is a guaranteed leak point under 1,800+ bar rail pressure.

The CPN5 family occupies a specific niche in the repair bay: it is robust enough to tolerate typical commercial duty cycles, yet its failure modes are predictable and often misdiagnosed as injector faults. When a Baudouin or Weichai engine exhibits hard starting, power derating, or excessive return flow, the pump is frequently the culprit-but only after the technician has ruled out a stuck pressure control valve or a leaking overflow valve. The economic argument for a genuine Bosch replacement over a rebuilt unit is straightforward: the CPN5 requires calibration on a specialized test bench after overhaul, and the labor plus bench time often approaches the cost of a new OEM pump. For a repair shop quoting a job to a commercial operator, the genuine unit with a 24-month warranty removes the risk of a calibration-related comeback and keeps the customer's equipment earning.

Every pump we ship can be accompanied by the Bosch factory test protocol for the specific serial number, showing plunger delivery values and pressure-holding results at the bench. We also provide real photographs of our warehouse stock and packing process upon request-not catalog renderings, but images of the actual unit with its original Bosch labels and tamper-evident seals intact. For wholesale accounts placing multi-unit orders, we can arrange batch documentation covering the production lot for your own quality records.

Product Testing, Inspection Records & Quality Verification for Diesel Fuel Injection Components

Injector Test Report

Fuel Delivery Test

Injection Performance Test

Return Flow Test

Operating Pressure Test

Quality Inspection Record

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Q1: Can I install this pump without replacing the injectors on a high-mileage engine?
A: If the injectors have passed a return-flow test and the rail has been flushed, yes-but document the injector test results. A failing injector with excessive leak-off can mask a healthy pump and lead to a misdiagnosis.

Q2: The old pump seized and sent debris through the system. What else must I replace?
A: At minimum, the high-pressure lines, rail, and all injectors require replacement or professional ultrasonic cleaning. The CPN5 does not tolerate residual contamination; a "clean enough" rail will destroy the new pump's plungers.

Q3: How do I distinguish 0445020282 from 0445020283 in ordering?
A: Both numbers appear on the same pump family and are functionally interchangeable in most Baudouin and Weichai applications. Confirm the engine serial number against the OEM parts catalog before ordering if your customer requires an exact match for warranty documentation.

Q4: What is the realistic lead time for wholesale quantities?
A: Single units ship within 48 hours from stock. For 5+ units, allow 5–7 business days for batch inspection and documentation preparation, especially if you require serial-number-specific test reports.

Q5: Does the 24-month Bosch warranty cover a pump damaged by contaminated fuel?
A: No-contamination failures are excluded. The warranty covers manufacturing defects, which is why we strongly recommend replacing the filter and water separator at the same time and retaining fuel samples if a claim becomes necessary.