The 1979322CAT cylinder liner plays the role of a "cylinder shield" during engine operation, with the piston reciprocating at high speed inside the liner, up to thousands of times per minute. The wear resistance and sealing performance of the liner directly determine the engine life. If the wear on the inner wall of the cylinder liner exceeds the standard, it will cause a decrease in cylinder pressure, oil to enter the combustion chamber, resulting in oil burning, power attenuation, and even serious faults such as cylinder pulling and bursting.
This cylinder liner is made of high nickel alloy cast iron, and the cylinder wall thickness is accurately calculated to ensure sufficient strength to resist piston side pressure and quickly transfer heat to the cooling system. The working temperature is reduced by more than 10 ℃ compared to ordinary cylinder liners. The inner wall is treated with plasma nitriding, which increases the hardness to HV500 or above, and enhances the anti-wear performance by 40% compared to untreated cylinder liners. At the same time, a fine oil film groove is formed to reduce the dry friction between the piston ring and the cylinder wall, extending the stable operation time after the break in period.
To ensure reliable sealing, precision sealing grooves are designed at the upper and lower ends of the cylinder liner, which are matched with temperature resistant sealing rings to effectively block the mutual flow of coolant and engine oil, avoiding emulsification. The outer wall is processed with spiral heat dissipation grooves, which increase the contact area with cooling water and improve the heat dissipation efficiency by 25%. It is suitable for Caterpillar 330D, 349D excavators and C9, C13 series engines, especially for long-term high load scenarios such as mining and heavy-duty operations.
Its processing accuracy reaches the micrometer level, with an inner diameter roundness error controlled within 0.01 millimeters, and precise clearance with the piston to ensure stable compression pressure and reduce power loss. After installation, there is no need for additional break in adjustments, and the engine cylinder sealing performance can be directly restored, reducing oil consumption and the risk of failure.
Ningbo Qiuning Trading Co., Ltd. provides options for the original and secondary factories of this model of cylinder liner. The original factory products strictly follow Caterpillar standards, with material composition and machining accuracy perfectly matching the original cylinder body, suitable for equipment with strict requirements for engine performance; By optimizing the casting process, the subsidiary products offer higher cost-effectiveness while ensuring wear resistance and sealing, meeting routine maintenance needs.
Each cylinder liner of the company undergoes hardness testing, roundness measurement, and water pressure sealing test to ensure the absence of defects such as sand holes and cracks. A professional team can recommend suitable products based on the intensity of equipment operation. Regardless of which one is chosen, it can provide reliable cylinder protection for Caterpillar engines and extend their service life.
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