What is Diesel Fuel Injection Pump 094000-0342?
The Diesel Fuel Injection Pump 094000-0342 is a high-pressure common rail fuel pump manufactured by Denso, specifically designed for Komatsu excavator engines, particularly the SAA6D series and related platforms. This pump is a critical component of the common rail fuel system, responsible for drawing fuel from the tank, pressurizing it to extreme levels, and delivering it to the common rail for distribution to the injectors. The 094000-0342 is typically a Denso HP3 or HP4-series radial piston pump, engineered to withstand the severe operating conditions of heavy construction equipment, including continuous vibration, dust, and extreme temperature variations. It ensures precise fuel metering, stable rail pressure, and reliable performance for excavators in mining, earthmoving, and demolition applications.
How Does Diesel Fuel Injection Pump 094000-0342 Work?
The Diesel Fuel Injection Pump 094000-0342 operates as a radial piston high-pressure pump with an integrated low-pressure transfer section. Driven by the engine’s timing gear train, the pump’s internal cam ring actuates three radial pistons arranged at 120-degree intervals. Fuel is first drawn from the tank through the low-pressure inlet by an integrated gear-type transfer pump. It then passes through a suction control valve (SCV), electronically controlled by the engine control unit (ECU). The ECU modulates the SCV to precisely regulate the volume of fuel entering the high-pressure pumping chamber. As the radial pistons reciprocate, they compress the fuel to pressures typically up to 1,800–2,000 bar. This high-pressure fuel is discharged into the common rail, where it accumulates and is held ready for the injectors. A pressure relief valve protects the system from over-pressure, ensuring stable rail pressure under all engine loads.
Advantages of Diesel Fuel Injection Pump 094000-0342
Choosing the Diesel Fuel Injection Pump 094000-0342 for Komatsu excavators offers several key benefits:
Extreme Durability: Constructed with hardened internal components and fuel-lubricated bearings, this pump is designed to withstand the high vibration, shock loads, and continuous operation typical of excavators.
Precise Fuel Control: The ECU-controlled suction control valve delivers the exact fuel volume required, resulting in smooth power delivery, improved fuel economy, and reduced emissions.
High-Pressure Performance: Capable of generating up to 2,000 bar, the pump ensures superior fuel atomization, leading to cleaner combustion, reduced soot, and lower particulate emissions.
Denso Reliability: Built to Denso’s rigorous standards, the pump offers long service life and consistent performance in demanding environments.
Direct Fit: Engineered specifically for Komatsu excavator engines, it matches OEM specifications for straightforward installation.
Application of Diesel Fuel Injection Pump 094000-0342
The Diesel Fuel Injection Pump 094000-0342 is specifically designed for Komatsu excavator engines that utilize Denso common rail systems. Common applications include:
Komatsu PC200-8 / PC220-8: Widely used in these popular 20-ton class excavators with SAA6D107E or similar engines.
Komatsu PC300-8 / PC400-8: Compatible with larger excavators in the -8 series that use the SAA6D114E or SAA6D125E engine platforms.
Komatsu PC130-8 / PC160-8: Fits mid-size excavators with 6-cylinder Denso-fueled engines.
Komatsu WA Series Wheel Loaders: Certain WA models sharing the same engine family may also use this pump.
Other Komatsu Equipment: Bulldozers, motor graders, and dump trucks powered by the same engine platforms may be compatible; verification by engine serial number is required.
Specifications (Types) of Diesel Fuel Injection Pump 094000-0342
The Diesel Fuel Injection Pump 094000-0342 belongs to the Denso HP3/HP4 family of common rail pumps. Key specifications include:
Pump Type: High-pressure common rail radial piston pump with integrated gear-type transfer pump.
Number of Pistons: 3 radial pistons arranged at 120 degrees.
Maximum Operating Pressure: 1,800–2,000 bar (26,100–29,000 psi), depending on engine calibration.
Drive Configuration: Flange-mounted, driven by engine timing gear train.
Fuel Metering: Electronically controlled suction control valve (SCV).
Low-Pressure Section: Integrated gear-type transfer pump.
Inlet Port: Low-pressure inlet compatible with Komatsu fuel filter assemblies.
Outlet Port: High-pressure outlet for connection to the common rail.
Compatibility: OEM replacement for Komatsu SAA6D107E, SAA6D114E, SAA6D125E, and related engines.
Lubrication: Fuel-lubricated; requires clean diesel fuel meeting EN590 or equivalent.
Common Failures: SCV wear, fuel contamination, internal component wear; symptoms include hard starting, loss of power, DTC codes (rail pressure related), and reduced machine performance.
Supplier of Diesel Fuel Injection Pump 094000-0342
Sourcing the Diesel Fuel Injection Pump 094000-0342 from a trusted supplier is essential for reliable performance and minimal downtime. Rsolid engine parts has established itself as a premier provider of high-quality fuel injection components, specializing in Denso systems for Komatsu, Hitachi, and other heavy equipment brands.
Rsolid engine parts distinguishes itself through rigorous quality control. Every 094000-0342 pump undergoes comprehensive testing, including pressure calibration, flow testing, and SCV response verification on specialized test stands. For exchange units, the company performs complete disassembly, ultrasonic cleaning, inspection, and replacement of all wear components with new OEM-grade parts.
In addition, Rsolid engine parts offers expert technical support to verify compatibility by excavator model, engine serial number, and OEM part number. With a robust inventory and efficient global logistics, they minimize downtime for contractors and equipment owners. By choosing Rsolid engine parts for your 094000-0342 fuel injection pump, you benefit from competitive pricing, warranty-backed assurance, and specialized diesel fuel system expertise.
