Four piece assembly

Four piece assembly


The four-piece set of an engine consists of four core components: cylinder liner, piston, piston rings, and piston pin. These are crucial components for combustion within the diesel engine. The piston's reciprocating motion compresses the air-fuel mixture to complete combustion, directly determining the engine's power, fuel consumption, sealing performance, and lifespan.

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Product Description

Four piece assembly

Product Introduction

The four-piece engine assembly consists of four core components: cylinder liners, pistons, piston rings, and piston pins. These are crucial components for combustion within a diesel engine. The piston’s reciprocating motion compresses the air-fuel mixture to complete combustion, directly determining engine power, fuel consumption, sealing performance, and lifespan. It is also one of the most frequently worn assemblies during engine overhauls.

The entire assembly is meticulously crafted from wear-resistant materials specifically designed for engineering machinery. The cylinder liners feature uniform wall thickness and mirror-finish inner walls; the pistons are lightweight and high-strength, resistant to high temperatures and deformation; the piston rings have uniform elasticity and provide a tight seal, effectively preventing blow-by, oil leakage, power loss, and black smoke. The entire assembly precisely conforms to original factory standards, ensuring smooth assembly, high interchangeability, rapid power recovery after installation, excellent sealing, and high durability.

Application Scenarios

  • Construction Sites: For loaders frequently scooping earth and starting under heavy loads, this assembly restores sufficient engine power, ensuring strong and consistent operation.
  • Mining Sites: For prolonged uphill and full-load operations, this assembly is heat- and wear-resistant, preventing cylinder scoring and oil burning.
  • Sand and gravel yards, coal yards: Suitable for continuous, long-term operation in all weather conditions, with stable sealing performance, reducing fuel consumption and exhaust smoke.
  • Agricultural machinery maintenance: Suitable for overhauling, repairing, and replacing diesel engines in 3-7 ton loaders, addressing issues such as cylinder scoring, oil burning, and engine power issues.
  • Harsh environments (high and low temperatures): Smooth cold starts, less prone to cylinder seizure at high temperatures, suitable for various complex working conditions on construction sites.

Product Specifications

  • Components: Cylinder liner, piston, piston rings, piston pin
  • Compatible Engines: Multi-cylinder diesel engines for loaders
  • Main Materials:
    Cylinder Liner: High-boron wear-resistant alloy cast iron
    Piston: High-silicon heat-resistant aluminum alloy
    Piston Rings: Alloy cast iron + nitriding treatment
    Piston Pin: High-strength alloy structural steel
  • Sealing Performance: Effectively prevents cylinder leakage and oil seepage
  • High Temperature Resistance: Withstands high combustion chamber temperatures, not easily melted or deformed
  • Wear Resistance: Low wear from reciprocating motion, extending overhaul intervals
  • Power Performance: Standard compression ratio, complete combustion, sufficient power and low fuel consumption
  • Product Advantages: Durable overall system, strong sealing, less prone to oil burning, fast power recovery, top choice for overhauls, wide versatility, high cost-effectiveness

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