4959759
Piston Pin
Cummins®

The Cummins 4959759 Piston Pin is a critical component in engine assemblies, particularly for commercial trucks. It connects the piston to the connecting rod, ensuring smooth and efficient engine operation. This part’s importance is underscored by its contribution to engine performance and reliability, essential for the rigorous demands of commercial trucking ¹.

Function and Operation

The 4959759 operates by providing a pivot point for the piston’s movement within the cylinder, maintaining a secure connection to the connecting rod. This reciprocating motion is vital for converting the piston’s linear motion into the crankshaft’s rotational motion. The pin’s design minimizes friction and wear, enhancing engine efficiency and longevity ².

Key Features

This Cummins part is distinguished by its precise design and material selection. It is tailored to fit within the piston and connecting rod assembly, with specific diameter and length. Special coatings or treatments may be applied to enhance performance and durability, ensuring reliable operation under high-stress conditions typical in heavy-duty truck applications ³.

Benefits

The Piston Pin offers several advantages, including improved engine efficiency through reduced friction between moving parts. Its design and material characteristics contribute to enhanced durability, enabling it to perform effectively under the demanding conditions of commercial trucking. Additionally, its precise engineering helps maintain optimal engine performance, contributing to overall vehicle efficiency ⁴.

Installation and Maintenance

Proper installation of the 4959759 involves adhering to specific torque specifications and alignment procedures to ensure it is securely and correctly positioned within the engine assembly. Regular maintenance, including inspection for wear and ensuring proper lubrication, is essential for the pin’s longevity and optimal performance. These practices help prevent premature failure and maintain engine efficiency.

Troubleshooting Common Issues

Common issues with piston pins, such as excessive wear, noise, or failure, can often be traced back to installation errors, lack of maintenance, or operational stresses beyond the pin’s design limits. Diagnostic procedures may include visual inspection, measurement of wear, and analysis of operational conditions. Addressing these issues may involve reinstallation, replacement, or adjustments to operational parameters to prevent recurrence.

Manufacturer Overview - Cummins

Cummins Inc. is renowned in the automotive industry for its high-quality engine components designed for commercial vehicles. With a history of innovation and a strong reputation for reliability, Cummins is committed to producing components that meet the demanding requirements of the commercial trucking industry. The company’s expertise and dedication to quality are evident in its wide range of engine parts, including the 4959759.

Compatibility with Cummins Engines

The 4959759 is designed to fit various Cummins engines, ensuring compatibility across different models. Here is a detailed breakdown of the engines with which this piston pin is compatible:

ISX12 Series

• ISX12 CM2350 X102
• ISX12 G CM2180 EJ
• ISX12/ISX11.9 CM2250

ISG12 Series

• ISG12 CM2880 G107

ISZ13 Series

• ISZ13 CM2150 Z105

QSG12 Series

• QSG12 CM2880 G112
• QSG12/X12 CM2350 G110

QSX11.9 Series

• QSX11.9 CM2250 ECF

X12 Series

• X12 CM2670 X121B

Each of these engines benefits from the precision engineering of the 4959759, ensuring smooth and efficient piston operation, contributing to the overall performance and longevity of the engine.

Role of Part 4959759 in Engine Systems

The 4959759 is integral to the engine system, facilitating the smooth operation of several key elements. It acts as a pivotal connection between the piston and the connecting rod, allowing for the efficient transfer of force generated by the combustion process.

In conjunction with the Engine Piston Kit, the Piston Pin enables the piston to move reciprocally within the cylinder, driven by the expanding gases from combustion. This motion is essential for converting thermal energy into mechanical work.

When integrated into an Overhaul Kit, the Piston Pin plays a role in restoring the engine’s performance by ensuring that the piston’s movement is precise and consistent. This is particularly important for maintaining the engine’s balance and reducing wear on other components.

The Piston Pin also interacts with the Piston Cooling Nozzle. Proper alignment and movement, facilitated by the Piston Pin, are necessary for the effective operation of the cooling nozzle. This ensures that the piston remains within optimal temperature ranges, preventing overheating and potential damage.

In performance-oriented applications, the Piston Pin is often included in Performance Parts packages. Here, it contributes to enhanced engine performance by supporting higher stress levels and more aggressive driving conditions.

Overall, the Piston Pin is a fundamental part that ensures the reliable and efficient operation of the engine, interacting with various components to maintain performance and durability.

Conclusion

The Cummins 4959759 Piston Pin is a vital component in engine assemblies, particularly for commercial trucks. Its precise design, material selection, and compatibility with various Cummins engines ensure reliable and efficient engine operation. Proper installation, maintenance, and troubleshooting are essential for maximizing the benefits of this part, contributing to the overall performance and longevity of the engine.