Description
Product Overview
The oil nozzle sleeve protects the fuel injection needle valve assembly and is assembled inside the cylinder head, serving multiple functions such as positioning, heat insulation, gas barrier, and auxiliary sealing. After long-term exposure to high-temperature and high-pressure impacts within the combustion chamber, as well as erosion by dust and impurities, the inner wall of the sleeve may wear out and the sealing gasket may harden and fail. This can result in misalignment of the oil nozzle, poor atomization, reverse combustion of high-temperature gas into the fuel injector head, leakage of diesel through the cylinder head installation hole, and a decrease in power, excessive black smoke, and dilution of the engine oil. This product's sleeve and sealing ring are precisely matched in a complete set, with unified internal and external dimensions, and the entire set can be replaced during maintenance, suitable for maintenance of single fuel injectors for mining machinery, heavy-duty trucks, and high-power generator sets.
Core advantages of the single product
Quenched and tempered alloy steel material, resistant to high temperatures, wear, and deformation
The sleeve is subjected to overall quenching and hardening treatment, with the inner wall precision mirror polishing, capable of withstanding high-temperature radiation in the combustion chamber and high-pressure fuel flushing. It is less likely to deform or rust under long-term heavy-duty conditions, effectively protecting the internal precision fuel injection components.
Gated outer wall positioning structure, precise assembly without offset
The outer wall is reserved multiple stepped positioning grooves, which are securely clamped after being installed in the cylinder head, limiting radial and axial displacement of the sleeve, avoiding eccentric wear of the fuel injection reciprocating motion, and ensuring the fuel injection is centered and the atomization is uniform.
Complementary thick black oil-resistant O-ring, double sealing to prevent leakage
Combined with a dedicated black fluororubber sealing ring, resistant to diesel and high-temperature aging, filling the gap between the sleeve and the inner wall of the cylinder head, blocking the upward surge of high-temperature gas in the combustion chamber and the outward leakage of fuel, stabilizing the fuel injection working environment.
Central standard through hole, compatible with corresponding specifications of fuel injectors
The center is reserved a standard through hole, with smooth and free-edge hole walls, matching the fuel injector of the same specification precisely, reducing unnecessary gaps and carbon accumulation, and lowering the probability of fuel injection blockage.
Surface metal strengthening treatment, resistant to carbon buildup and easy to clean
The outer surface of the sleeve is treated for wear resistance, making it less likely to accumulate thick carbon deposits under high temperatures, facilitating maintenance, disassembly, and cleaning, and extending the lifespan of the component.
Complete set assembly, direct installation without secondary adjustment
The sleeve and sealing ring are individually tested for matching dimensions, with high compatibility. After replacement and maintenance, there is no need for on-site grinding and correction, quickly restoring the sealing and positioning performance of the fuel injector. List of Accessories
21515329 Injector nozzle sleeve 1 piece
Black oil-resistant sealing O-ring 1 piece Applicable scenarios
This product is suitable for large mining excavators with single-cylinder injection systems, heavy-duty freight trucks, and high-power fixed diesel generators. It is applicable to the replacement of the positioning and sealing components of heavy-duty diesel engine fuel injectors in environments with 24-hour continuous heavy loads, high cabin temperatures and vibrations, and dust and impurity-containing diesel.
Product Basic Parameters
Product Name: 21515329 Injector Nozzle Sleeve Kit
Part Number: 21515329
Main Material: Tempered hardened alloy steel sleeve, fluororubber sealing O-ring
Structural Feature: Mirror-polished inner wall, stepped positioning outer wall, central through-hole for nozzle, matching sealing rubber ring
Application Conditions: High-temperature radiation in the cylinder, high-pressure fuel injection, dust and impurity-containing diesel corrosion of heavy-duty diesel engine
Product Status: New complete set of accessories, factory completed with full set of matching clearance, high-pressure sealingity, and high-temperature durability testing
Packaging: Single tube independent protective packaging, both ends of the sleeve equipped with plastic protective plugs, buffering protection to avoid transportation bumps and scratches on the precise inner wall, supporting single-piece retail, bulk purchase in boxes, and suitable for cross-border small items and full-box logistics.
