Description
Product Overview
090150-4460 Piston Pair is a precision-matched component for generating high-pressure fuel in mechanical diesel fuel injection pumps. The piston rod and the sleeve are one-to-one ground and matched, and they rely on reciprocating motion to compress the fuel and establish the injection pressure. After long-term use, the wear of the mating surfaces may cause oil pressure leakage and a decrease in the fuel supply flow rate. The complete set replacement can quickly restore the rated fuel supply pressure of the pump, suitable for the refurbishment and maintenance of diesel pumps in trucks, construction machinery, and generator sets. This significantly reduces the overall replacement cost.
Unique Core Features of the Single Item
Three-stage stepped slot sleeve, positioning and anti-rotation + layered pressure-bearing
The sleeve adopts a three-stage stepped outer diameter design, with positioning slots reserved on the side walls. During assembly, it can be quickly inserted into the limit structure of the fuel pump to prevent the sleeve from rotating and shifting during operation; the stepped structure distributes the high-pressure impact force layer by layer, and it is not prone to internal wall deformation and roundness loss under long-term high-pressure conditions.
Head spiral inclined slot piston, precisely adjusting the circulation fuel supply volume
The end of the piston is processed with a standard spiral control oil inclined slot. By rotating the piston, the effective fuel supply stroke can be changed, which is suitable for adjusting the fuel injection volume under different load conditions. Under idle and heavy load conditions, the oil pressure output is stable, and the engine operation is without obvious vibration.
One-to-one mirror surface matching and grinding, with extremely low leakage during pressure retention
The piston and the sleeve are precisely matched and ground as a complete set. The mating gap is strictly calibrated, the sliding resistance is small, and the high-pressure fuel leakage is low. It continuously maintains a stable injection pressure, avoiding problems such as acceleration weakness and excessive black smoke.
Overall quenching and hardening treatment, wear-resistant and resistant to impurities scratching
The entire set uses high-hardness alloy steel for quenching and forming. The inner and outer mating surfaces are mirror-polished. Diesel impurities and gum friction are not prone to cause scratches. The high-frequency reciprocating motion wear is slow, and the maintenance cycle of the pump is extended.
Separate complete set packaging, one-stop maintenance preparation
The piston rod and the sleeve are shipped as a complete set. There is no need to match individual pieces separately. The maintenance store can batch prepare for easier maintenance. By disassembling the fuel pump, the entire set of core wear parts can be replaced simultaneously, shortening the downtime for maintenance.
Application Scenarios
Suitable for corresponding series inline mechanical fuel injection pumps, widely used in heavy-duty freight trucks, wheeled loaders, mining engineering equipment, and fixed diesel generator sets. Suitable for oil pump internal maintenance and replacement in high-temperature, low-temperature, alternating high and low temperatures, and dusty continuous heavy-load working conditions of road transportation and construction sites.
Product Basic Parameters
Product Name: 090150-4460 Precision Piston Pair (Piston + Sleeve as a Complete Set)
Part Number: 090150-4460
Main Material: High-hardness quenched alloy steel
Structural Feature: Three-stage stepped slot sleeve, spiral inclined slot control oil piston, separate complete set precision matching
Application Conditions: All-weather continuous heavy load, alternating high and low temperatures, dusty diesel power supply system
Product Status: New matched finished product, completed with smooth sliding and high-pressure pressure retention sealing performance factory inspection
Packaging: Independent hard isolation small packaging, the piston and the sleeve are separately protected to avoid transportation impact and scratches on the precise mating mirror surface, suitable for cross-border small package logistics
