3945258
Dipstick
Cummins®

The Cummins 3945258 Dipstick is a specialized component designed for use in heavy-duty trucks. Its primary function is to facilitate the accurate measurement of engine oil levels, which is vital for maintaining the health and performance of the engine. Regular monitoring of oil levels helps ensure that the engine operates within optimal parameters, thereby enhancing longevity and efficiency ¹.

Basic Concepts of a Dipstick

A dipstick is a simple yet essential tool in the lubrication system of an engine. It consists of a long, slender metal or plastic rod with a handle at one end. The other end is inserted into the engine’s oil sump. The dipstick allows mechanics and operators to check the oil level by pulling it out and observing the oil mark on the stick. This process helps in assessing whether the oil level is within the acceptable range, indicating whether an oil change or top-up is necessary ².

Purpose of the Cummins 3945258 Dipstick

This Cummins part plays a specific role in the operation and maintenance of heavy-duty trucks. It is engineered to provide precise oil level readings, which are critical for ensuring that the engine has the correct amount of lubrication. Proper oil levels are necessary for reducing friction, dissipating heat, and protecting engine components from wear and damage. The dipstick’s design ensures that it fits securely into the engine, providing consistent and reliable readings ³.

Key Features

The Cummins 3945258 Dipstick is characterized by several key features that enhance its functionality. It is constructed from high-quality materials to withstand the harsh conditions within a heavy-duty truck engine. The dipstick is designed with a robust handle for easy gripping and removal. Additionally, it features clear markings for oil level indicators, allowing for straightforward interpretation of the oil level. The design also includes a slightly curved tip to ensure it fits snugly into the oil sump, preventing oil leaks and ensuring accurate readings.

Benefits

Using the Cummins 3945258 Dipstick offers several benefits. Its precise design ensures accurate oil level readings, which are vital for maintaining engine health. The durable construction of the dipstick means it can withstand the rigors of heavy-duty use, providing long-lasting performance. Additionally, the clear markings and easy-to-use handle make it convenient for regular checks, promoting consistent maintenance practices.

Installation and Usage

Proper installation and usage of the Cummins 3945258 Dipstick are important for ensuring accurate oil level readings and maintaining engine health. To install, locate the dipstick tube in the engine compartment. Insert the dipstick fully into the tube until it reaches the bottom, then withdraw it slowly. Check the oil level against the markings on the dipstick. For usage, ensure the engine is off and has had time to cool before checking the oil level to get an accurate reading.

Troubleshooting and Maintenance

Common issues with dipsticks include inaccurate readings due to bent or damaged dipsticks, and oil leaks around the dipstick tube. To troubleshoot, inspect the dipstick for any signs of damage and replace it if necessary. Ensure the dipstick is fully seated in the tube to prevent leaks. Regular maintenance involves keeping the dipstick and tube clean and free from debris, which can interfere with accurate readings.

Safety Considerations

When using the Cummins 3945258 Dipstick, it is important to observe several safety practices. Always ensure the engine is off and has cooled down before checking the oil level to avoid burns from hot engine components. Additionally, be cautious when interpreting the oil condition. Contaminated or discolored oil may indicate underlying issues that require further investigation and possible engine service.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. Founded in 1919, Cummins has a long-standing reputation for innovation and quality in the automotive and heavy-duty truck industry. The company is committed to providing reliable and efficient power solutions, enhancing the performance and durability of vehicles across various applications.

Cummins Engine Dipstick Compatibility

The Cummins part number 3945258, which is a Dipstick, is compatible with several models of Cummins engines. This dipstick is designed to fit seamlessly into the specified engine models, ensuring accurate oil level readings and facilitating proper maintenance procedures.

ISB CM550

The ISB CM550 engine is one of the models that can utilize the dipstick part number 3945258. This engine is known for its robust performance and reliability, making it a popular choice in various applications.

QSB5.9 44 CM550

Another model that is compatible with the dipstick part number 3945258 is the QSB5.9 44 CM550 engine. This engine variant is also recognized for its durability and efficiency, making it suitable for a wide range of uses.

By ensuring that the dipstick part number 3945258 is used with these engines, operators can maintain optimal engine performance and longevity. The dipstick’s design is tailored to provide accurate oil level readings, which is crucial for the engine’s health and efficiency.

Role of Part 3945258 Dipstick in Engine Systems

The part 3945258 dipstick is an essential component in the arrangement of engine systems, specifically concerning the oil fill and gauge mechanisms. It serves as a direct interface between the oil level within the engine and the external environment, allowing for precise measurement and monitoring.

Oil Fill Arrangement

In the oil fill arrangement, the dipstick provides a pathway for adding oil to the engine. It is inserted into the oil filler neck, which is connected to the oil pan. When the dipstick is removed, it leaves an opening through which oil can be poured. This ensures that oil is added directly to the oil pan, where it is stored before being circulated through the engine.

Oil Level Measurement

The primary function of the dipstick is to measure the oil level within the engine. After oil has been added or the engine has been running, the dipstick is reinserted into the filler neck and then withdrawn to check the oil level. The dipstick has markings that indicate the minimum and maximum oil levels. By observing where the oil adheres to the dipstick, engineers and mechanics can determine if the oil level is within the acceptable range.

Integration with Oil Gauge Systems

In more advanced engine systems, the dipstick may be integrated with an oil gauge. The gauge can be mechanical or electronic, providing a more precise reading of the oil level. The dipstick, in this case, acts as a probe that sends information to the gauge, allowing for continuous monitoring of the oil level without the need for manual checking. This integration enhances the overall efficiency and reliability of the engine system by ensuring that the oil level is consistently maintained within the optimal range.

Conclusion

The Cummins 3945258 Dipstick is a critical component for maintaining the health and performance of heavy-duty truck engines. Its precise design, durable construction, and ease of use make it an invaluable tool for regular engine maintenance. By ensuring accurate oil level readings, this part helps in reducing friction, dissipating heat, and protecting engine components from wear and damage. Proper installation, usage, and maintenance of the dipstick are essential for optimal engine performance and longevity.