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Fuel Pump 5256607

1.OEM No.: 5256607
2.Product Name:Fuel Fump 5256607
3.Types: High Pressure Fuel Injection Pump
4.Material:Metal, high-grade aluminum casing and forged steel
5.Size:27 x 27 x 26 cm
6.Weight :7.5-8.5kg
7.Function: The diesel fuel is pressurized to extremely high pressure levels and then precisely delivered to the injectors via a common rail system.
8.Place of origin: China

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Product Introduction

The fuel pump with part number 5256607 is a high-pressure fuel pump (injection pump) widely used in Cummins diesel engine systems.

Basic Information

Model NO.	5256607
Compatible engine models	Cummins ISF3.8 (widely used in light trucks such as Beiqi Foton Aoling and Aumark) Cummins QSB6.7 (used in construction machinery, generator sets, special vehicles, etc.)
Compatible brands/models	Beiqi Foton (Aoling, Aumark) LiuGong (e.g., CLG926E excavator) Terex 1404MK excavator Other equipment equipped with Cummins ISF or QSB series diesel engines
Fuel system type	Electrically controlled high-voltage common rail systems are mostly supported or compatible with Bosch technology platforms.
product status	brand new
OEM accessories	yes
Main functions	Low-pressure fuel is pressurized to high pressure (typically >1000 bar). Precise control of injection timing and fuel quantity, in conjunction with the ECU, achieves efficient combustion.
Installation location	Driven by gears or chains from the front or side of the engine.
Things to note	Clean the fuel lines before installation. Do not run the engine without fuel or test under no-load conditions. It is recommended to replace the fuel filter at the same time.

Products Description

Maximum output pressure	1600 bar(Some China VI emission standard models can reach 1800 bar)
Working speed range	500 – 4000 rpm(Driven by the engine camshaft)
Fuel supply (rated operating conditions)	≈ 120 – 180 mL/rev(Depending on the load)
Oil inlet pressure (low-pressure side)	2 – 6 bar(Requires support from a pre-installed oil pump)
Return oil pressure	≤ 1.5 bar(Usually vented to the atmosphere or low-pressure return oil pipe)
Drive mode	Camshaft gear direct drive (timing gear system)
Control method	The solenoid valve (PCV or SCV) is controlled by the ECU metering unit.
Fuel type	National Standard 0# / -10# Diesel (compliant with GB 19147 standard)
Operating temperature range	-30°C to +120°C (ambient + fuel temperature)
Total length (including drive shaft)	≈ 220 – 250 mm
Pump body width	≈ 120 – 140 mm
Mounting flange hole distance	The most common type is the 4-M8 bolt, with a hole spacing of approximately 80×80 mm (square distribution).
High pressure oil outlet thread	M14×1.5 or M16×2 (high-pressure oil rail interface)
Oil inlet thread	M12×1.0 or quick-connect fitting (low-voltage side)
Oil return port	M8×1.0 or hose clamp type
Solenoid voltage	12V DC (vehicle system)
Solenoid valve resistance	≈ 0.5 – 1.2 Ω (Low impedance type, requires dedicated drive circuit)

Technical highlights

1. High-precision electromagnetic metering control (SCV/PCV technology)

Utilizes high-speed solenoid valves (such as SCV: Suction Control Valve) to adjust the fuel intake volume in milliseconds;

Controlled in real time by the engine ECU, achieving precise closed-loop management of rail pressure, with pressure fluctuations ≤ ±10 bar;

Supports dynamic response under complex operating conditions such as cold starts, high altitudes, and transient acceleration.

2. Ultra-high operating pressure capability (up to 1600–1800 bar) Meets the requirements of China V/China VI emission regulations for multiple injections (pre-injection, main injection, and post-injection); High-pressure atomization makes fuel particles finer (SMD < 20 μm), improving combustion efficiency and reducing soot and NOx.

3.Integrated modular design: The pump body, drive shaft, metering valve, and pressure relief valve are highly integrated, resulting in a compact structure; This reduces external piping connection points, lowers the risk of leakage, and improves system sealing and reliability.

4.Optimized lubrication and cooling mechanism: Utilizing diesel fuel as the lubricating medium, it flows through key friction pairs such as plunger pairs and bearings; The internal flow channels are optimized through CFD simulation to ensure good heat dissipation even under high temperature and high load conditions.

5.Strong anti-pollution design: Key components (plunger-sleeve) are ultra-fine ground and treated with special coatings (such as DLC diamond-like carbon coating); The fuel inlet is equipped with a multi-stage filtration and guidance structure to tolerate a certain degree of fuel impurities.

6.Potential for Hybrid and Multi-Energy Platform Adaptation
Some new 5256607 derivative versions already support hybrid diesel systems with frequent start-stop cycles and high torque at low speeds;
The control algorithm is compatible with future hydrogen-diesel dual-fuel conversion needs (such as the HyPoint platform that Cummins is testing).

Basic Information about the Company

Onode company is one of the leading exporter of truck parts and engineering machinery and equipment in China, petrochemical manufacturer,based on 3 families' factories, and over 50 cooperated factories. We can provide about 7000 varieties of spare parts for European & Chinese Trucks ; Onode company was found in 2007, originally to dealing with truck parts and engineering machinery a&equipment and petrochemical. Meanwhile we invest to develop spare parts for European truck together with ourfamilies" factories. With the powerful product development department, professional quality control department andenthusiastic service team, our company growth very fast inthe past 20 years.