Description
Product Overview
The distribution valve disc is assembled inside the pump chamber of the distributed high-pressure oil pump. After the cam drives the piston to generate high-pressure fuel, the precise arrangement of oil holes on the disc surface ensures the uniform distribution of fuel， maintaining consistent fuel injection volume for each cylinder of the engine. Under long-term continuous flushing by thousands of bar of high-pressure fuel， abrasive diesel particles grinding， and high-temperature vibration conditions of the engine compartment， the inner wall of the oil holes will wear and enlarge the holes， and the end face sealing plane will develop scratches. This will result in significant deviations in fuel supply flow for each cylinder， chaotic oil pressure control， idle speed wobble， heavy-load power breakdown， repeated ignition failure at low temperatures， and excessive black smoke emissions from the exhaust. This product has all its outer diameter thickness， oil hole diameter， hole position layout， and outer ring step dimensions standardized for processing. After disassembling the high-pressure oil pump， replacing the valve disc alone can repair the failure of flow distribution. It is suitable for large-scale mining excavators， heavy-duty wheel loaders， and long-distance heavy-duty freight trucks with diesel engines for high-pressure oil distribution pump maintenance and servicing.
Core Advantages of the Single Item
Integrated precision turning of tempered hardened alloy steel， high hardness and resistance to high-pressure erosion and wear
The entire alloy steel undergoes high-temperature quenching and hardening treatment， with the end face fully mirror-polished. It is less likely to develop scratches or deform the oil holes under long-term exposure to high-pressure fuel and abrasive particles. It maintains standard flow distribution parameters for a long time， ensuring stable oil pump fuel supply uniformity.
Central main oil hole + four sets of symmetrical holes， balanced flow distribution without deviation
The disc surface adopts a layout of the central main oil inlet combined with four sets of symmetrical guide and holes around the periphery. The hole positions have been calibrated for flow. During the flow of high-pressure fuel， the distribution is uniform， precisely distributing the fuel supply flow， eliminating engine vibration and power imbalance caused by uneven fuel supply for each cylinder.
Multiple layers of stepped limit grooves on the outer ring， precise assembly and positioning without radial offset
The multi-layer stepped limit structure on the outer side allows precise positioning and limiting when the valve disc is installed in the oil pump chamber， preventing the valve disc from rotating， tilting， or offsetting during operation， and avoiding oil hole misalignment that causes oil path blockage and fuel supply attenuation.
Parallel mirror sealing planes on both sides， no gap and no fuel leakage
Both ends of the valve disc are ground to a micron-level flatness， with extremely small parallelism tolerance. After assembly， it is completely tightly fitted with the oil pump housing and the piston assembly， without any tiny gaps causing fuel leakage， ensuring stable oil pump internal oil pressure.
Precise oil hole machining without burrs， no metal debris contaminating the oil pump oil path
All oil holes are CNC drilled and then polished to remove burrs. There are no metal edge fragments or debris， and they will not fall into the oil pump oil passage during replacement and assembly， avoiding scratches on the piston and blockage of small oil passages.
Independent single-piece flow calibration and detection， no need for manual grinding and fitting
Each valve disc is independently tested on the machine for the flow distribution， high-pressure holding time， and flatness sealing performance. The factory performance parameters are uniform， and it can be directly replaced and assembled without on-site manual grinding and adjustment， significantly reducing the time for disassembling and repairing the oil pump. List of Accessories
7135-486 High-pressure oil pump分流 distribution valve disc 1 piece, separately vacuum-sealed plastic box packaging Applicable scenarios
It is suitable for large-scale mining excavators, heavy-duty wheel loaders, long-distance heavy-duty freight trucks, high-power fixed diesel generators with distributed high-pressure common rail and mechanical direct injection fuel supply systems. It is applicable for 24-hour continuous heavy-duty operations in mines, long-distance trunk transportation, hot and dusty environments at construction sites, and the replacement of the internal fuel flow distribution core components of the heavy-duty diesel engine's high-pressure distribution oil pump.
Product Basic Parameters
Product Name: 7135-486 High-Pressure Oil Pump Diversion Distribution Valve Disk
Part Number: 7135-486
Main Material: Tempered hardened alloy steel, double-sided mirror surface plane grinding
Structural Feature: Circular integrated valve disk, central main oil hole + four sets of symmetrical diversion guide holes, outer ring multi-layer stepped limit grooves, double-sided parallel sealed mirror surface
Application Conditions: Uniform high-pressure fuel diversion and distribution, continuous vibration of engine compartment under hot and cold conditions, distribution control component for heavy-duty diesel engine with distributed high-pressure oil pump under corrosion of impure diesel
Product Status: New and complete diversion distribution valve disk, factory completed with full calibration and testing of flow distribution accuracy, high-pressure sealingity, and plane parallelism
Packaging: Independent transparent hard plastic box for individual packaging, isolated from dust and impurities, avoiding scratches on the mirror surface sealing plane during transportation, supporting single-piece retail and bulk purchase of the entire box, and compatible with cross-border small package logistics.
