Description
Product Overview
The plunger assembly is installed inside the high-pressure oil pump body and is driven by a cam mechanism to reciprocally compress the fuel, establishing the required high-pressure oil pressure for injection. Under long-term mining heavy-load, impurity diesel erosion, and spring fatigue failure conditions, the plunger sealing surface wears, the spring elasticity declines, resulting in internal fuel pressure leakage, a significant drop in boost efficiency, insufficient climbing power of the equipment, multiple ignition required for startup, and continuous shaking at idle speed. This product features an integrated plunger assembly, with the inner and outer circular mirror surfaces of the plunger ground to high precision, precise control of the clearance, standardized installation dimensions and stroke parameters, eliminating the need for on-site grinding for adaptation, suitable for maintenance of mining excavators, heavy-duty loaders, and large-power diesel generator sets' mechanical fuel injection pumps.
Unique Core Advantages of the Single Product
Top multi-tooth spline drive connector, no slippage in power transmission
Top involute multi-tooth spline structure, hardened treatment, closely meshed with the cam follower, no sliding teeth or lost stroke during reciprocating transmission, ensuring stable each boost stroke and continuous output of standard high-pressure fuel.
Integrated mirror plunger rod, wear-resistant and internal leakage prevention
The plunger rod is integrally formed, with high-precision mirror surface grinding on the surface, micrometer-level sealing clearance, impurity diesel is less likely to scratch the sealing surface, significantly reducing internal backflow of high-pressure fuel, and stabilizing fuel supply pressure.
Thickened and quenched high-pressure reset spring, durable and non-fatigued
Matching large-diameter compression spring, quenched and hardened treatment, uniform and stable elasticity, does not fatigue and deform under long-term high-frequency reciprocating motion, ensuring rapid plunger reset and eliminating problems of insufficient fuel injection closure and dripping oil during shutdown.
Bottom limit and sealing base, precise positioning and anti-bias wear
The base has a ring-shaped limit positioning, precisely limiting after being installed in the pump cylinder, no unilateral tilt wear during plunger reciprocation, the sealing groove on the end face of the base can be matched with a sealing gasket to block fuel leakage and pressure reduction.
The base is engraved with 1W6541 part number, facilitating storage and maintenance identification
The outer side of the base is laser engraved with model identification, resistant to diesel immersion, wiping wear, and for quick differentiation during spare parts preparation and model matching, avoiding incorrect installation and abnormal performance of the oil pump.
Overall quenched alloy steel material, suitable for harsh heavy-load conditions
The entire plunger, spring, and base are processed from high-hardness alloy steel, resistant to thousands of bar high-pressure impact, and resistant to scratches from dust particles, with longer service life in 24-hour continuous operation in the mining area, reducing the frequency of equipment shutdown and maintenance. Applicable scenarios
This product is suitable for large-scale mining excavators, heavy-duty wheeled loaders, and fixed-power large-capacity diesel generators in mines. It is applicable for the major overhaul of high-pressure oil pumps of heavy-duty diesel engines in harsh environments such as continuous full-load operation in the mining area, high-temperature and vibration in the engine compartment, and exposure to high dust and impurity diesel.
Product Basic Parameters
Product Name: High-pressure Oil Pump Piston Assembly
Part Number: 1W6541
Main Material: Tempered and hardened alloy steel (piston rod, spring, base)
Structural Feature: Top spline-driven joint, mirror-faced piston rod, thickened high-pressure reset spring, bottom limit sealing base, outer wall engraved model identification
Application Conditions: High-frequency reciprocating boost, extremely high oil pressure impact, long-term high-temperature in the engine compartment, outdoor dust and impurity diesel environment for heavy-duty direct injection diesel engine oil pump core boost component
Product Status: New and complete piston assembly, factory completed with all calibration and testing for pressure rise performance, high-pressure sealingity, and spring elasticity
Packaging: Single independent hard tube protection, plastic plugs at both ends for protection, preventing the piston mirror face and spline end from being scratched during transportation, supporting single-piece retail, bulk purchase in cases, and compatibility with cross-border small items and full-case logistics.
