CYEFI CB6P1082A High-Pressure Common-Rail Fuel Pump

For workshop owners and diesel specialists diagnosing persistent power loss or extended crank times, the CYEFI CB6P1082A (OEM 1001671518) arrives as a factory-spec common-rail injection pump engineered to reset fuel delivery parameters to original tolerances. This unit directly replaces degraded OE assemblies on select Weichai powerplants, restoring the precise hydraulic pressure necessary for atomised combustion without the expense of entire fuel system retrofits. Constructed around a hardened camshaft and precision-ground plunger set, this new pump offers a straightforward path back to rated horsepower and stable idle behaviour across variable load cycles.

This high-pressure fuel pump operates on the positive-displacement principle, where a rotating cam lobe actuates three radially arranged pumping plungers to compress diesel to rail pressures exceeding 1,600 bar. The integral fuel metering valve-an electrically actuated proportional solenoid-modulates inlet flow based on PWM signals from the engine ECU, enabling real-time rail pressure trimming independent of engine speed. Housing incorporates a dedicated lubrication circuit that relies solely on the diesel passing through it, making water contamination particularly destructive. The pump drive shaft uses a tapered nose with a keyway for positive timing engagement, while the mounting flange carries O-ring sealing for high-pressure fuel containment. Internal clearances between plunger and barrel are held to micron tolerances, directly influencing volumetric efficiency and start-up fuel delivery.

This diesel injection component finds its primary application across Weichai-powered construction equipment, including wheel loaders, excavators, and heavy-duty trucks commonly serviced in North American and European fleet workshops. The CB6P1082A supersedes earlier pump revisions within the same engine family, offering improved plunger metallurgy for extended duty cycles. Beyond Weichai platforms, this pump cross-references to installations where the 1001671518 OE number appears, making it a viable option for machinery owners seeking to maintain factory fuel curves without reprogramming or calibration changes. Fleet managers operating mixed equipment benefit from stocking this single SKU to cover multiple units, given its widespread adoption in mid-to-large displacement diesel architectures produced over the last decade.

Before bolting the replacement pump, technicians must lock the engine at top-dead-centre compression and verify the drive gear alignment marks. The camshaft timing relation to crankshaft position governs injection window accuracy; a one-tooth misalignment shifts delivery by approximately six crankshaft degrees, enough to trigger rail pressure deviation faults under load. During fitting, apply clean engine oil to the O-ring and shaft splines to prevent galling during initial rotation. Torque the mounting nuts in a crossing pattern to the factory-specified value to avoid housing distortion that could bind the internal cam bearing. Post-installation, crank the engine with the fuel pump relay disabled to circulate lubricant through the pumping elements before pressurisation, then perform a minimum of three key-on, key-off cycles to purge entrained air from the low-pressure side prior to the first start attempt.

Parameter	Specification
Part Number	CB6P1082A / 1001671518
Type	High-Pressure Common-Rail Pump
Application	Construction Machinery / Diesel Engines
OEM Code	1001671518
Condition	New
Weight	Approx. 30 kg

Q1: Which engine serial numbers or build dates confirm compatibility with this CB6P1082A pump?
A: Compatibility hinges on the OEM pump code stamped on the original housing. Confirm your existing unit carries 1001671518 or CB6P1082A. The pump fits Weichai engines with the corresponding fuel system architecture; verify against the engine nameplate or consult your equipment dealer for build-date ranges.

Q2: What rail pressure values should I see at idle and full load after installing this unit?
A: At warm idle, expect 280–350 bar; full-load rail pressure typically settles between 1,400 and 1,600 bar, governed by ECU demand. Persistent deviation beyond ±30 bar at steady-state operation warrants further system inspection for injector leakage or pressure-regulator malfunction.

Q3: Is core exchange or a surcharge applied when purchasing this replacement pump?
A: Core policies vary by supplier; this offering is sold as a complete new assembly without core charge, eliminating the logistical burden of returning your old unit and accelerating turnaround for urgent repairs.

Q4: How does water ingress affect this pump internally, and what visual indicators confirm damage?
A: Water reduces lubricity and causes micro-pitting on plunger surfaces; visual signs include rust-coloured residue at the inlet port or scoring visible on the cam lobe. Preventative water-separator maintenance remains the most effective safeguard against premature pump failure.

Q5: Can I reuse existing high-pressure fuel lines or must they be replaced alongside the pump?
A: Reusing lines carries contamination and sealing risks; many OEM procedures mandate line replacement if the pump suffered internal failure. Evaluate line integrity and thoroughly flush all fuel rails before installing the new pump to prevent debris migration.

 

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