Cummins 3267978 K19/K38 High-Performance Diesel Fuel Pump – Precision & Reliability For Modern Common-Rail Systems

Designed specifically for Cummins K19 and K38 diesel engines, the 3267978 fuel pump ensures seamless integration with high-pressure common-rail systems. Its robust design supports industrial, marine, and heavy-duty vehicle operations, maintaining consistent fuel delivery even under extreme load conditions.

The Cummins 3267978 is engineered to optimize fuel atomization, improving combustion efficiency and reducing emissions. Constructed from high-strength alloy components, the pump guarantees durability and long-term reliability. Its precision machined plunger and cam system provide consistent fuel output across a wide RPM range.

 

Technical Specifications

 

Type: High-pressure rotary plunger fuel pump

Compatible Engines: Cummins K19, K38

Maximum Pressure: Up to 2500 bar

Flow Rate: 180–220 L/h at rated engine speed

Weight: 18.5 kg

Material: Hardened alloy steel, corrosion-resistant coatings

Operational Temperature: -20°C to 120°C

 

 

The 3267978 fuel pump offers stable pressure regulation for precise common-rail injection. Its calibrated delivery ensures consistent injection timing and volume, minimizing pressure fluctuations that can affect engine performance. Ideal for turbocharged and naturally aspirated setups.

Structural Highlights

Rotary Plunger Mechanism: Delivers smooth, continuous fuel supply

Sealed Bearings: Reduce wear and extend service intervals

High-Precision Camshaft: Maintains consistent injection across varying engine loads

Integrated Pressure Relief Valve: Protects downstream injectors and rails from overpressure

 

 

Optimized for K19 and K38 engines, the pump works harmoniously with Cummins' advanced electronic control units (ECUs). Its plug-and-play design minimizes installation complexity, and the hardened interface ensures leak-free connections with high-pressure fuel lines.

 

 

This fuel pump excels in:

Mining, construction, and heavy-duty trucks

Agricultural machinery requiring high-load endurance

Marine propulsion engines with continuous high-output demands

Backup power generators and stationary diesel engines

 

Q: Can the 3267978 pump be retrofitted on older K38 engines?
A: Yes, it supports previous K38 iterations, provided rail and injector specifications match OEM standards.

Q: How often should seals and plunger assemblies be inspected?
A: Typically every 2000–2500 operating hours or per manufacturer service intervals.

Q: Does the pump support ultra-low sulfur diesel (ULSD)?
A: Fully compatible with ULSD and standard diesel fuels used in North America and Europe.

Q: Can this pump handle high-altitude operations?
A: Yes, the pressure regulation ensures stable injection even in thin-air environments.

Q: Is calibration required after installation?
A: Yes, a bench or in-situ calibration aligns pump delivery with rail pressure requirements.

Q: Are spare parts readily available globally?
A: Cummins' authorized distributors stock key components, ensuring rapid service.

 

 

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