Description
Product Overview
The plunger pair is assembled inside the high-pressure oil pump body and moves reciprocally under the drive of the cam to compress the fuel and establish the system's high-pressure oil pressure. After long-term exposure to diesel impurities and wear on the sealing mating surfaces, the plunger clearance increases, resulting in fuel leakage, decreased boost efficiency, difficulty in cold start of the engine, insufficient climbing power, and unstable supply pressure. This product features an integrated precision plunger assembly with internal and external mirror surface grinding, precise control of the mating clearance, standardized installation flange hole spacing and plunger stroke size, and does not require grinding to adapt when disassembling and assembling, suitable for maintenance of high-pressure oil pumps in heavy-duty trucks, construction machinery, and generator sets.
Unique core advantages of this product
Multi-stage stepped mirror surface plunger rod, lower wear during reciprocating motion
The rod body is formed by multiple stepped sections, with mirror surface grinding on both the inner and outer walls, achieving high coaxiality with the pump barrel, no unilateral wear during reciprocating motion, micrometer-level sealing clearance, significantly reducing high-pressure fuel leakage, and stabilizing the supply pressure.
Double-hole integrated fixed flange, stable and anti-offset assembly positioning
The bottom has symmetrical installation holes on both sides of the flange, which is formed by thick cast iron and is formed integrally. After assembly, the force is evenly distributed, and the engine will not loosen or shift under continuous vibration conditions, avoiding plunger jamming and fuel supply interruption.
Multiple ring-shaped sealing limit grooves, precise matching to seal components to isolate pressure relief
The rod body is equipped with multiple ring-shaped locking grooves, which can match the corresponding sealing rings, layering to block the return of high-pressure fuel, segmental locking of oil pressure, improving the boost efficiency of the oil pump, and eliminating low-speed pressure relief and power loss problems.
The end is engraved with the part number for quick identification during inventory and maintenance
The top of the plunger is laser-engraved 2418455165 as a mark, resistant to diesel soaking, wiping wear, and can be quickly identified during storage and maintenance matching, avoiding incorrect installation of parts and resulting in failure of the oil pump performance.
Overall nitrided hardened alloy steel, resistant to high-pressure impurities
The entire plunger assembly is processed by high-hardness alloy steel, with surface nitrided hardening treatment, resistant to scratches from diesel impurities, able to withstand thousands of bar continuous high-pressure impact, with longer service life in harsh conditions such as mining areas and long-distance heavy-load environments, reducing the frequency of repeated major oil pump repairs.
Factory-calibrated flow and stroke, stable oil pump boost performance
The oil pump assembly completes the detection of the supply flow and boost speed of a single plunger, with high consistency of parameters in the same batch of plungers, and the oil pump can quickly return to the standard oil pressure output after replacement, reducing maintenance and debugging time.
Application scenarios
Suitable for heavy-duty long-distance freight trucks, large mining excavators, heavy-duty wheeled loaders, fixed high-power diesel generators, and heavy-duty diesel engines with mechanical direct injection or high-pressure common rail fuel supply systems, suitable for 24-hour full-load conditions in mining areas, high-temperature vibration in the engine compartment, and high-dust impurity diesel environments for oil pump maintenance of heavy-duty diesel engines.
Product basic parameters
Product name: High-pressure oil pump plunger pair
Part number: 2418455165
Main material: Nitrided hardened alloy steel
Structural features: Multi-stage stepped mirror surface plunger rod, double-hole fixed flange base, multiple ring-shaped sealing limit grooves, end engraved model identification
Application conditions: High-frequency boost, ultra-high oil pressure impact, long-term high-temperature engine compartment, outdoor dust and impurity diesel environment, core boost component of heavy-duty diesel engine oil pump
Product status: New precision plunger pair, factory-calibrated for high-pressure sealing, supply flow, and boost response
Packaging: Each unit is independently protected by a transparent hard tube, with plastic plugs at both ends for protection, preventing the precision mirror surface of the plunger from being scratched during transportation, supporting single-piece and bulk purchase in boxes, suitable for cross-border small package / full-box logistics.
