Description
Product Overview
The plunger spring assembly is a key component for establishing high-pressure fuel in the single pump. The cam drives the plunger to compress the spring to complete the oil pumping, and the spring's rebound drives the plunger to reset and draw in the oil. After long-term heavy-duty, high-temperature reciprocating compression in the mining area, the spring's elasticity decreases, the plunger rod is worn and damaged, resulting in insufficient oil supply stroke, unstable oil pressure, uneven oil supply to each cylinder, engine black smoke, and power loss. This product comes with a complete set of pre-installed plunger rod, positioning gasket, and reset spring, eliminating the need to separately match scattered parts. The factory completes elasticity, mating clearance, and sealingity tests, and is suitable for maintenance and replacement of single pumps for heavy mining machinery, heavy trucks, and large power generation units.
Unique core features of this product
Integrated and pre-installed in one set, including plunger rod + gasket + spring
Each complete set includes a precision plunger rod, upper and lower positioning wear-resistant gaskets, and high-temperature alloy reset spring. This set directly replaces the internal components of a single cylinder, eliminating the cumbersome process of separately selecting springs, gaskets, and plungers, significantly reducing maintenance time.
Nitrided and hardened precision plunger rod, wear-resistant and resistant to high pressure, not prone to scratches
The plunger rod is made of high-hardness alloy steel through one-piece turning, and is surface nitrided and mirror-polished. The mating clearance with the pump body cylinder is extremely small. Long-term high-pressure diesel flushing does not cause wear or scratches, eliminating internal oil pressure leakage and pressure drop, ensuring stable supply pressure.
High-strength alloy spring with large diameter, persistent rebound force without fatigue
The spring uses high-temperature alloy wire rolled and undergoes tempering treatment. It is not prone to deformation and elasticity decline during continuous reciprocating compression, ensuring that the plunger always resets to the correct position during each stroke, providing continuous and stable oil supply, eliminating idle vibration and intermittent oil supply faults.
Double-layer positioning gaskets on top and bottom, limiting and buffering to reduce wear and abnormal noise
The thickened wear-resistant metal positioning gaskets are placed at both ends of the spring, separating the spring from the pump body and the plunger step, buffering the reciprocating impact and vibration, reducing metal friction noise, and precisely limiting the stroke of the spring, avoiding spring skew and wear.
Step-shaped positioning step design, precise assembly without offset
The integrated step-shaped positioning platform in the middle of the plunger rod is fixed in the pump body cylinder, ensuring the plunger does not deviate during reciprocating motion, guaranteeing coaxial cooperation between the plunger and the cylinder, uniform wear, and extending the service life of the entire component set. Applicable scenarios
It is suitable for heavy-duty freight trucks, large mining excavators, heavy-duty loaders, high-power fixed diesel generator sets that are equipped with corresponding single pump systems. It is applicable to mining areas and construction sites for 24-hour full-load operation under high temperature and high dust conditions. It is suitable for the overhaul of heavy-duty diesel power injection systems of single pump units in heavy-duty mechanical diesel engines.
Product basic parameters
Product name: Single pump plunger spring assembly
Part number: 1W6541
Main material: Nitrided hardened alloy steel plunger rod, high-temperature resistant alloy spring, wear-resistant metal positioning gasket
Structural features: Complete set of plunger rod + spring + positioning gasket, stepped positioning plunger, large-diameter strong reset spring, double-layer buffer and limit gasket
Application conditions: 24-hour continuous full-load operation, long-term high-temperature in the engine compartment, outdoor high-dust heavy-duty mechanical diesel engine single pump
Product status: New complete set of plunger spring components, factory completed with full set of spring elasticity, plunger clearance, and high-pressure sealingity tests
Packaging: Each component is separately packaged in an independent transparent protective tube, isolating the plunger rod from transportation impacts and scratches, supporting single-component, multi-component complete set batch purchases, and suitable for cross-border small package logistics
