Description
6755-71-1310: Complete assembly of a high-pressure common rail fuel pump specifically for small construction machinery. It is a core fuel supply component of small and medium-sized diesel injection systems. The pump body is an integrally formed, thickened, die-cast aluminum alloy unit. The front end is equipped with a sealing rubber ring and a precision spline-driven main shaft. The top integrates an electronic control flow meter valve. There are standardized double-sided high-pressure oil outlet threaded interfaces. The inlet and outlet ports are equipped with transparent and black dust-proof protective plugs. The entire machine has undergone full-condition calibration for fuel supply flow, high-pressure sealing, electronic control response, and rail pressure stability at all working conditions upon leaving the factory. This eliminates problems such as insufficient rail pressure, weak acceleration, difficulty in cold start, idle vibration, and oil leakage and pressure relief in the oil circuit. The finished machine does not require disassembly for maintenance and can be directly adapted and installed on the corresponding small construction machinery diesel engine for replacement. Product Overview
This high-pressure oil pump integrates three functions: low-pressure self-priming fuel delivery, high-pressure plunger boosting, and electronic control flow regulation. It is driven by engine gears and outputs stable high-pressure fuel to the common rail system. Under long-term continuous construction operations, alternating hot and cold conditions in the engine compartment, and exposure to impure diesel, internal plunger seals wear out, metering valve valve cores get stuck, and shell seals age. This results in delayed pressure building, significant power loss, frequent engine shutdowns, and excessive black smoke emissions. This integrated finished oil pump has standardized installation holes, drive shafts, oil circuit interfaces, and electrical control plugs. The factory calibrates the oil pressure curve for the entire machine, eliminating the need for on-site debugging. It is suitable for small excavators, light loaders, and the maintenance of electric control common rail diesel engine fuel supply systems for small-sized construction machinery.
Product Core Advantages
Thickened integrated die-cast aluminum pump body, lightweight and high rigidity
High-density aluminum alloy integrated die-casting, with strengthened outer wall ribs for a stronger structure, lower self-weight while resisting vibration and deformation; the cavity heat dissipation channels are optimized to quickly remove the heat generated by high-pressure operations, reducing internal carbon formation and preventing shell oil leakage and cracking.
Front end with sealing ring spline drive shaft, stable transmission without internal leakage
End with quenched and spark-etched output shaft, paired with a ring-shaped sealing gasket, tightly engaging with the transmission mechanism, without tooth slippage or loss of rotation under high load; the sealing ring isolates the fuel leakage at the main shaft position, avoiding oil dilution.
Top integrated electronic control flow metering valve, linearly precise rail pressure regulation
Integrated electric control flow control valve module, with gold-plated conductive contacts, receiving real-time ECU signals to regulate fuel intake flow, smoothly controlling the common rail oil pressure, eliminating sudden high or low oil pressure and single-cylinder power jolts; the insulated valve body is resistant to diesel oil and gas corrosion.
Dual-side independent high-pressure oil outlet interfaces, balanced supply suitable for multi-cylinder models
Two oil outlet threaded connectors on the left and right sides, with precisely rolled threads, each supply line is independently allocated, and the factory uniformly calibrates the differences in oil supply for each oil line, ensuring uniform combustion in the cylinders and reducing black smoke and fuel loss.
Multiple ports equipped with dust protection plugs, full protection of precise oil circuits
All metering valves, oil outlet ports, and low-pressure oil inlet ports are equipped with dedicated plastic plugs. During storage and cross-border transportation, these plugs seal the oil circuit holes to prevent dust and impurities from entering the plunger and valve core, avoiding clogging and blockage. Upon arrival, they can be directly assembled.
The entire machine is calibrated for high-pressure flow at various high and low pressure conditions, and the oil pressure, flow, and electrical control response are detected. The consistency of each oil circuit supply is high, allowing for rapid restoration of equipment power and fuel economy after replacement, significantly reducing maintenance and debugging time.
Application Scenarios
Suitable for small mining excavators, light wheeled loaders, and fixed small diesel generator sets equipped with high-pressure common rail fuel supply systems. Suitable for continuous light-load operations in construction sites, alternating hot and cold conditions in the engine compartment, and light-duty construction machinery with impure diesel environments for electric control common rail diesel engine fuel supply assembly replacement.
Product Basic Parameters
Product Name: Small Construction Machinery High-Pressure Common Rail Fuel Pump Assembly
Part Number: 6755-71-1310
Main Material: Die-cast aluminum pump body, quenched alloy steel drive shaft, alloy plunger boosting subassembly, integrated electric control metering valve assembly
Structural Characteristics: Integrated die-cast aluminum pump body, front end sealed spline drive shaft, top integrated electric control metering valve, dual-side high-pressure oil outlet interfaces, multiple specifications of oil circuit dust-proof plugs
Application Conditions: High-pressure continuous fuel supply, seismic vibration, alternating hot and cold conditions in the engine compartment, impure diesel environment for light-duty electric control common rail diesel engine fuel supply assembly
Product Status: New and complete oil pump assembly, factory-calibrated for fuel supply flow, high-pressure sealing, electrical control response, and rail pressure stability
Packaging: Single independent shockproof hard cardboard packaging, all oil circuits and electrical control ports pre-installed with dust protection plugs, cushion foam isolates transportation impacts and damages to the precise structure, supporting single-piece retail, bulk purchase in boxes, and suitable for cross-border small-piece / box logistics.
