Genuine Piston Assembly-195-15-12730

Core Features

Power Conversion: Withstanding the explosive pressure of fuel combustion within the cylinder (≤18 MPa), the piston converts this pressure into reciprocating thrust from the connecting rod, driving the crankshaft to output power.

Sealing and Leak Prevention: Working with two compression rings and one oil ring, it achieves cylinder sealing (leakage ≤0.5%) and oil scraping from the cylinder walls, preventing fuel gas leakage and oil from entering the combustion chamber.

High-Efficiency Heat Dissipation: Built-in cooling oil channels circulate oil to remove heat from the piston top, controlling piston temperature and preventing overheating and deformation.

Guidance and Positioning: The piston skirt mates with the cylinder liner, guiding the piston's reciprocating motion, ensuring motion accuracy, and reducing vibration and noise.

Wear Resistance and Friction Reduction: Wear-resistant inlays on the top and a graphite coating on the skirt reduce friction with the cylinder liner, extending the life of both the piston and cylinder liner.

Product Superiority

Original factory precision fit: Piston diameter, ring grooves, and pin bore are fully compatible with SAA6D140 cylinders/connecting rods, allowing for direct replacement without modification; installation is instantaneous.

Steel top and aluminum skirt composite structure: The top features a 42CrMo steel inlay (hardness 45–50 HRC) for high-temperature impact resistance, while the skirt is made of lightweight cast aluminum (ADC12 + silicon reinforced), balancing strength and heat dissipation.

Dual superior sealing and heat dissipation: Three piston rings (compression ring + oil ring) + built-in cooling oil channels result in ≤0.5% leakage, improving heat dissipation efficiency by 30% and preventing overheating deformation.

Low friction and long life: Graphite coating on the skirt (friction coefficient ≤0.15), bronze bushings for the piston pin bore, wear-resistant inlays for impact resistance, and a fatigue life ≥12,000 hours.

Easy maintenance: Pre-assembled piston rings and piston pins; installation only requires adjustment to the original factory clearance, no additional machining required.

Installation and Maintenance Points

Before installation, clean the piston, ring grooves, and pin holes, checking for cracks, deformation, and wear. The piston ring clearance should be 0.2–0.3 mm (compression ring) and 0.3–0.4 mm (oil ring).

Install the piston rings according to the original factory markings (compression ring chrome side up, oil ring spring side towards the skirt). Cold-fit the piston pin (-20℃) into the pin hole, ensuring the retaining ring is in place to prevent it from falling off.

After installation, check the piston-to-cylinder liner clearance to be 0.04–0.06 mm, and ensure the piston ring opening is misaligned by 120° to prevent combustion gas leakage.

Every 5000 hours, check the piston crown for carbon buildup, ring groove wear, and skirt coating condition. Replace the piston when wear exceeds 0.1 mm.

Regularly change the engine oil and filter to prevent impurities from entering the cylinder and causing abnormal piston and cylinder liner wear.

Fit scenarios and value

Suitable for: High-load conditions such as mine stripping, large-scale earthmoving, and long-term continuous operation.

Core value: Ensures efficient engine power output, reduces fuel and oil consumption, extends engine overhaul intervals, and reduces downtime maintenance costs.