The 6204-31-2141 Engine Piston is a critical component meticulously engineered for Komatsu 4D95 series engines. Designed for optimal performance and durability, this piston ensures the efficient operation of your heavy machinery. It plays a vital role in the combustion process, converting the energy from fuel into mechanical power, making it indispensable for maintaining the productivity and longevity of your equipment.
| Parameter | Value |
|---|---|
| Part Number | 6204-31-2141 |
| Engine Model | Komatsu 4D95 Series (e.g., 4D95LE-2, S4D95LE-3) |
| Applicable Equipment | Komatsu PC78US-6 Excavator |
| Piston Diameter | Approximately 95mm (Standard for 4D95) |
| Material | High-Strength Alloy Steel |
| Key Features | Precision Machined, Heat Resistant, Optimized for Combustion Efficiency |
Superior Durability: Constructed from robust alloy steel to withstand extreme temperatures and pressures, ensuring a long service life.
Precision Engineering: Manufactured to exact OEM specifications, guaranteeing a perfect fit and optimal performance within the engine's cylinder.
Enhanced Fuel Efficiency: Designed to facilitate complete combustion, leading to better fuel economy and reduced operational costs.
Reliable Performance: Contributes to consistent engine power output, critical for demanding construction and excavation tasks.
Reduced Emissions: Optimized design aids in cleaner combustion, supporting lower environmental impact.
This high-quality piston is specifically designed for the Komatsu PC78US-6 Hydraulic Excavator, a versatile machine known for its compact design and powerful performance.
Urban Construction: Its compact tail swing allows for efficient operation in confined city spaces, such as residential areas, narrow streets, and commercial sites.
Underground Utility Work: Ideal for trenching, pipe laying, and cable installation, where precision and maneuverability are crucial.
General Excavation and Earthmoving: Suitable for a wide range of tasks from digging foundations to clearing land on various construction sites.
Backfilling and Grading: The PC78US-6, equipped with its standard backfill blade, is highly effective for light grading and efficient trench filling.
Landscaping Projects: Perfect for jobs requiring minimal ground disruption and precise movement in sensitive environments.
In a recent urban utility project, a fleet of Komatsu PC78US-6 excavators equipped with genuine 4D95 engine pistons demonstrated exceptional operational efficiency. The machines' short tail swing and precise hydraulic controls, powered by reliable 4D95 engines, allowed operators to navigate tightly packed utility corridors with ease. The consistent engine performance, bolstered by durable pistons, minimized downtime, and significantly accelerated project completion, showcasing the integral role of high-quality internal engine components in maintaining peak machine productivity and safety standards.
For comprehensive engine maintenance and repair, consider these other essential components compatible with Komatsu 4D95 series engines and applicable equipment like the Komatsu PC78US-6:
Cylinder Liners: Ensure proper cylinder sealing and protect the engine block.
Piston Ring Sets: Crucial for maintaining compression, regulating oil consumption, and transferring heat.
Main and Connecting Rod Bearings: Provide smooth rotation for the crankshaft and connecting rods.
Cylinder Head Gaskets: Seal the combustion chambers and coolant/oil passages.
Engine Valve Sets (Intake & Exhaust): Control the flow of gases into and out of the combustion chamber.
Engine Gasket Kits: Comprehensive sets for engine overhaul, ensuring all seals are renewed.
Proper installation and regular maintenance are crucial for the longevity and performance of your engine piston. Here are some common issues and their solutions:
Burned or Melted Pistons: Often caused by faulty fuel injectors, prolonged use of low-quality fuel, or issues with the exhaust gas recirculation (EGR) system leading to excessive combustion temperatures.
Cracked Pistons: Can result from fuel quality issues, EGR system failures, or severe detonation/pre-ignition within the cylinder.
Worn Piston Rings: Indicated by symptoms like white exhaust smoke, noticeable power loss, increased oil consumption, or decreased engine compression. This can be due to normal wear, abrasive particles, or improper cylinder honing.
Hydrostatic Lock: Occurs when an incompressible liquid (e.g., water, excessive fuel) enters the cylinder, preventing the piston from completing its stroke and causing severe damage.
Piston Scoring/Scuffing: Usually due to inadequate lubrication, contaminated engine oil, or incorrect piston-to-cylinder wall clearances.
Regular Maintenance: Adhere strictly to the manufacturer's recommended service intervals for oil changes, filter replacements (oil, fuel, air), and general engine inspections.
Fuel System Integrity: Ensure fuel injectors are clean and functioning correctly, and always use high-quality, clean diesel fuel to prevent deposits and improper combustion.
Proper Lubrication: Use the recommended engine oil and maintain correct oil levels. Regularly check for oil contamination.
Air Filtration: Replace air filters as per schedule to prevent abrasive particles from entering the combustion chamber, which can cause premature wear on pistons and rings.
Professional Installation: Piston replacement requires precise measurements and careful assembly. Always rely on certified technicians with specialized tools and knowledge. Ensure correct clearances and torque specifications are met.
Monitor Engine Performance: Pay attention to unusual noises, excessive smoke from the exhaust, or changes in power output, as these can be early indicators of piston-related issues.
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