High-Horsepower Cummins Engine Fuel Pumps
Fuel pumps for NT855, K19, K38 and K50 are core components of the Cummins engine lineup covering various displacements and application scenarios. Though all built on the classic PT fuel system principle, they differ in design, materials and technical details to meet diverse operating demands ranging from construction machinery and large mining equipment to generator sets.
NT855 Fuel Pump
Compatible Engines
NT855, NTA855 series engines (14L inline six-cylinder)
Typical Applications
Bulldozers (e.g. Shantui SD22), excavators, 200–300kW generator sets
Material & Structure
The pump housing is made of high-strength cast aluminum, featuring light weight and excellent heat dissipation. Core internal components including gears and bushings are precision-machined from alloy steel for outstanding wear and corrosion resistance. Its compact layout allows easy installation on construction machinery with limited assembly space.
Features & Advantages
PTG-EFC Electronic Governing Version
Most NT855 pumps for generator sets are equipped with EFC electronic governors, delivering fast response and stable frequency, ideal for scenarios requiring high-quality power output.
PTG Mechanical Governing Version with MVS Governor
Models for construction machinery adopt robust MVS full-range mechanical governors with strong shock resistance, perfectly suited for harsh working environments.
High Reliability
Decades of field operation have proven its ultra-low failure rate, easy maintenance and highly interchangeable spare parts.
Technical Highlights
Pressure-Time (PT) Fuel System Principle
Fuel delivery is precisely metered by regulating fuel pressure and injection timing. The system boasts a simple structure and relatively lower requirements for fuel cleanliness.
Integral Gear Feed Pump
Supplies stable low-pressure fuel feed to guarantee reliable cold start under high-altitude and high-temperature conditions.
K19 Fuel Pump
Compatible Engines
K19, KTA19 series engines (19L inline six-cylinder)
Typical Applications
Our in-house designers and engineers have produced countless great designs for customers from different industries
Material & Structure
The pump housing is made of high-strength cast aluminum, featuring light weight and excellent heat dissipation. Core internal components including gears and bushings are precision-machined from alloy steel for outstanding wear and corrosion resistance. Its compact layout allows easy installation on construction machinery with limited assembly space.
Features & Advantages
PTG-EFC Electronic Governing Version
Most NT855 pumps for generator sets are equipped with EFC electronic governors, delivering fast response and stable frequency, ideal for scenarios requiring high-quality power output.
PTG Mechanical Governing Version with MVS Governor
Models for construction machinery adopt robust MVS full-range mechanical governors with strong shock resistance, perfectly suited for harsh working environments.
High Reliability
Decades of field operation have proven its ultra-low failure rate, easy maintenance and highly interchangeable spare parts.
Technical Highlights
Pressure-Time (PT) Fuel System Principle
Fuel delivery is precisely metered by regulating fuel pressure and injection timing. The system boasts a simple structure and relatively lower requirements for fuel cleanliness.
Integral Gear Feed Pump
Supplies stable low-pressure fuel feed to guarantee reliable cold start under high-altitude and high-temperature conditions.
K38 Fuel Pump
Compatible Engines
K38, KTA38 series engines (38L V12 configuration)
Typical Applications
800–1000kW large diesel generator sets, mining haul trucks (e.g. Terex TR50), marine main engines
Material & Structure
The pump housing is constructed from heavy-duty cast aluminum or cast iron with an ultra-robust structure to withstand intense vibration and high torque output of V12 engines. Internal gears and bearings undergo specialized heat treatment for extended service life.
Functional & Design Advantages
Ultra-large flow and pressure output
Designed to deliver fuel for a 38-liter displacement with 12 cylinders, it boasts one of the largest displacement and pressure delivery capacities among the four fuel pump models.
Dual-path fuel supply design
Certain variants adopt an internal dual oil circuit layout to feed the left and right cylinder banks separately, ensuring balanced fuel delivery for all cylinders.
Exceptional reliability & long service life
Engineered for 24-hour non-stop generator operation and harsh mining environments, it features an extremely high MTBF (Mean Time Between Failures).
Technical Highlights
Dual governor options: PT(G) mechanical or PT(EFC) electronic control
Mechanical PTG governors are available for mobile equipment, while EFC electronic governors come as standard for generator set applications to guarantee precise, stable frequency output.
Reinforced drive interface
The rear drive gear and connecting flange are structurally strengthened to bear massive torque transmitted from the engine gear train.
K50 Fuel Pump
Applicable Equipment
K50, QSK50 series engines (50L V16 configuration)
Typical Applications
Ultra-large generator sets over 1000kW, super-large mining haul trucks (e.g. Terex TR100), port machinery
Material & Structure
Manufactured with top-grade alloy materials and premium production processes. The pump housing adopts heavy-duty cast iron or high-strength alloy aluminum. All internal moving components undergo precision grinding and surface hardening treatment to withstand extreme working conditions.
Features & Advantages
Ultimate fuel flow & pressure output
Engineered to supply fuel for the 50-liter 16-cylinder engine, it delivers the highest flow rate and pressure among all Cummins PT pump series.
Outstanding adaptability to extreme environments
Custom-built for frigid, sweltering, high-altitude and high-dust scenarios, guaranteeing reliable startup and stable operation under all working conditions.
Extended maintenance intervals
Designed for a service life of tens of thousands of operating hours, drastically cutting downtime and maintenance expenses.
Technical Highlights
Standard PT(EFC) electronic governing system
Equipped with high-precision electronic governors as standard, stabilizing frequency and voltage output for ultra-high-power generator sets.
Intelligent diagnostic interface
Newer pump models reserve sensor ports to communicate with the engine ECM, enabling real-time monitoring of fuel system operating status.
Summary and Comparison
| Model | Displacement | Number of Cylinders | Typical Applications | Core Advantages |
| NT855 | 14L | 6 | Construction machinery, small & medium generator sets | Compact structure, easy maintenance, high cost performance |
| K19 | 19L | 6 | Large generator sets, marine vessels | High fuel flow, high pressure, precise electronic speed regulation |
| K38 | 38L | 12 | Extra-large generator sets, mining haul trucks | Ultra-high fuel flow, dual-circuit fuel supply, high reliability |
| K50 | 50L | 16 | Extra-large generator sets, super-large mining haul trucks | Ultimate performance, adaptability to extreme environments, ultra-long service life |