Description
Product Overview
The plunger assembly relies on the cam to drive the gear to rotate and reciprocally compress the fuel to establish high pressure and distribute the oil path to each cylinder injector. It is the core boosting component of the mechanical plunger oil pump. Under long-term heavy mining conditions, poor-quality impure diesel washing, and high-frequency high-pressure reciprocating impact, the wear gap between the plunger and the sleeve increases, resulting in fuel high-pressure backflow and pressure loss, insufficient fuel supply, weak engine acceleration, excessive black smoke in exhaust, difficulty in starting at low temperatures. This product has the drive gear, spring, and sleeve assembled as a complete set for grinding matching, with uniform standardized dimensions, stroke, and elastic force parameters. There is no need for on-site matching and grinding, significantly reducing maintenance time and suitable for maintenance of plunger oil pumps for mining engineering machinery, heavy-duty freight trucks, and high-power diesel generators.
Core Advantages of the Single Product
The left end is integrally formed drive gear, with stable transmission engagement without slippage
The multi-tooth precision quenched gear, with wear-resistant surface strengthening treatment, has a tight bite with the oil pump transmission mechanism, and will not slip under continuous vehicle jolting and heavy-load conditions. The reciprocating stroke of the plunger is precise and stable, ensuring consistent fuel injection volume per cycle.
The thick large-diameter high-pressure reset spring, with anti-fatigue long-term pressure regulation
The thick high-temperature-resistant alloy spring, with unified calibrated elastic coefficient, is not prone to elastic attenuation under long-term high-frequency compression, and the plunger return stroke is completely in place, eliminating problems of untimely oil cut-off, speed drift, and idle vibration.
The segmented mirror-quenched plunger sleeve, with extremely low high-pressure sealing leakage
The plunger and sleeve mating surface is ultra-precise mirror-grinding, with strict control of the mating gap, low internal leakage of high-pressure fuel, and stable fuel supply pressure under both high and low load conditions, ensuring smooth engine operation and reducing carbon deposits and exhaust black smoke.
The oil passage holes on the side of the sleeve are arranged in multiple paths, allowing smooth and balanced fuel distribution
The standard oil passage holes are integrally opened on the side wall of the sleeve, with low fuel circulation resistance, uniform multi-path diversion, and avoiding excessive or insufficient fuel supply to a single cylinder. The overall power output is balanced.
The overall quenched and hardened alloy steel material, with excellent wear resistance and corrosion resistance, has a longer service life
All plunger, gear, and sleeve components are quenched and hardened, able to withstand continuous impurities from poor-quality diesel, and the wear rate is lower under harsh conditions such as mining areas and construction sites, reducing the frequency of repeated maintenance.
Independent final inspection for the entire set, no need for secondary adjustment during assembly
Each plunger component is individually tested for fuel supply flow, opening pressure, and sealing performance. The parameters are unified, and after assembly, the original factory fuel supply performance of the oil pump is restored directly, without the need for professional equipment calibration. Applicable scenarios
It is suitable for large mining excavators with mechanical plunger injection systems, heavy-duty freight trucks, and high-power fixed diesel generators. It is applicable for 24-hour continuous heavy-duty operations in mines, long-distance freight transportation, high-intensity agricultural work, high-temperature and vibration in engine cabins, and corrosion from impure diesel in heavy-duty diesel oil pumps. It is used for replacing the core booster components of heavy-duty diesel pumps in environments with extremely high oil pressure, continuous high-temperature vibration in engine cabins, and corrosion from poor-quality impure diesel in diesel engines.
Product basic parameters
Product name: 4P9830 Plunger Pump Head Assembly
Part number: 4P9830
Main material: Tempered hardened alloy steel plunger, driving gear, high-pressure reset spring
Structural features: Left end multi-tooth driving gear, thickened high-pressure spring, multi-layer mirror-finished plunger sleeve, side wall high-pressure oil passage holes
Application conditions: Ultra-high oil pressure reciprocating compression oil supply, continuous high-temperature vibration in engine cabins, corrosion from poor-quality impure diesel in heavy-duty diesel engines
Product status: New complete set of plunger assembly, factory completed with complete bench testing for clearance, oil supply pressure, and flow uniformity
Packaging: Single independent hard tube protection packaging, with plastic protective covers at both ends to isolate transportation from磕碰划伤 the precision mating surface of the plunger， supporting single-piece retail， bulk purchase in cases， and compatibility with cross-border small package logistics
