4359134
Pump Tappet
Cummins®

Introduction

The Cummins Pump Tappet 4359134 is a specialized component designed for use in heavy-duty truck engines. Its purpose is to facilitate the operation of the valve train system, ensuring that the valves open and close at the correct times and with the appropriate force. This part plays a role in maintaining engine efficiency and performance by managing valve clearance and contributing to the smooth operation of the engine ¹.

Basic Concepts of Pump Tappets

Pump tappets, also known as hydraulic lifters, are components within an engine’s valve train system that automatically adjust valve clearance. Unlike solid tappets, which require manual adjustment, pump tappets use engine oil to maintain the necessary clearance between the camshaft and the valves. This automatic adjustment helps to ensure consistent valve operation over time, reducing the need for frequent maintenance ². The primary function of a pump tappet is to transfer motion from the camshaft to the valves, allowing them to open and close in sync with the engine’s operation.

Role of the Pump Tappet in Truck Operation

The Cummins Pump Tappet 4359134 contributes to the efficient operation of a truck engine by ensuring that the valves maintain proper clearance throughout the engine’s operation. This is achieved through the tappet’s ability to adjust its internal components using engine oil pressure. By maintaining optimal valve clearance, the pump tappet helps to ensure that the valves open and close at the correct times, which is vital for engine performance. This component also plays a role in reducing wear on the valve train components by providing a consistent and smooth transfer of motion from the camshaft to the valves ³.

Key Features of Cummins Pump Tappet 4359134

The Cummins Pump Tappet 4359134 is designed with specific features that enhance its performance and durability. These include precision engineering to ensure accurate valve operation, the use of high-quality materials to withstand the harsh conditions within an engine, and a robust construction that contributes to its longevity. The tappet’s design also incorporates features that facilitate easy installation and maintenance, making it a practical choice for heavy-duty truck applications.

Benefits of Using Cummins Pump Tappet 4359134

Utilizing the Cummins Pump Tappet 4359134 offers several advantages. These include improved engine efficiency due to its role in maintaining optimal valve clearance, reduced maintenance requirements thanks to its self-adjusting nature, and enhanced reliability, which is a result of its durable construction and precision engineering. These benefits contribute to the overall performance and longevity of the engine, making the Cummins Pump Tappet 4359134 a valuable component in heavy-duty truck engines.

Troubleshooting and Maintenance

Common issues associated with pump tappets can include noise from the valve train, which may indicate a problem with the tappet’s operation. Diagnostic procedures for such issues involve checking the engine oil for contamination or low levels, as well as inspecting the tappet for signs of wear or damage. Maintenance practices to ensure the longevity and optimal performance of the Cummins Pump Tappet 4359134 include regular oil changes to maintain clean and adequate lubrication, as well as periodic inspections of the valve train components for signs of wear or malfunction.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history spanning over a century, Cummins has established itself as a leader in the diesel engine manufacturing industry, known for its commitment to innovation, quality, and customer satisfaction. The company’s expertise in engine technology and its dedication to advancing the automotive industry make it a trusted name in the production of high-quality engine components, including the Cummins Pump Tappet 4359134.

Compatibility of Cummins Pump Tappet 4359134

The Cummins Pump Tappet part number 4359134 is designed to fit a variety of Cummins engines, ensuring compatibility across multiple models. This part is integral to the engine’s operation, providing precise control over the fuel pump mechanism. Below is a detailed breakdown of the engines with which this tappet is compatible:

ISX Series Engines

• ISX12 CM2350 X102
• ISX12/ISX11.9 CM2250
• ISX15 CM2250
• ISX15 CM2250 SN
• ISX15 CM2350 X101

ISZ Series Engines

• ISZ13 CM2150 Z105

QSK Series Engines

• QSK19 CM2350 K144G

QSX Series Engines

• QSX11.9 CM2250 ECF
• QSX15 CM2250
• QSX15 CM2250 ECF
• QSX15 CM2350 X105

QSZ Series Engines

• QSZ13 CM2150 Z101
• QSZ13 CM2150 Z102

X Series Engines

• X15 CM2350 X116B
• X15 CM2450 X134B

Role of Part 4359134 Pump Tappet in Engine Systems

In the context of the XPI JV System utilized by Cummins HD and Scania HD engines, the 4359134 Pump Tappet is integral to the efficient operation of the fuel injection process. This component interacts directly with the fuel pump within the XPI JV System, ensuring precise control over fuel delivery to the engine’s combustion chambers.

The Pump Tappet operates in conjunction with the fuel pump to modulate the pressure and timing of fuel injection. It is positioned to receive signals from the engine’s control unit, which dictates the required fuel pressure based on engine load, speed, and other operational parameters. The tappet then translates these signals into mechanical action, adjusting the pump’s operation accordingly.

Within the XPI JV Components, the 4359134 Pump Tappet’s role is to maintain the desired fuel pressure and delivery rate, which is essential for optimal engine performance and efficiency. Its interaction with the fuel pump ensures that the fuel is delivered at the precise moment and pressure required for efficient combustion, contributing to the overall reliability and performance of the engine system.

Conclusion

The Cummins Pump Tappet 4359134 is a critical component in the operation of heavy-duty truck engines, ensuring optimal valve clearance and efficient fuel injection. Its design and features contribute to engine performance, reliability, and longevity, making it a valuable part in the Cummins engine lineup.