3973946
Dipstick
Cummins®

The Cummins 3973946 Dipstick is a component designed for use in heavy-duty truck engines. Its primary function is to facilitate the measurement of oil levels within the engine, ensuring that the lubrication system operates effectively. This part is integral to maintaining the engine’s performance and longevity by allowing for regular checks and maintenance of oil levels.

Basic Concepts of a Dipstick

A dipstick is a simple yet vital tool used in internal combustion engines to measure the level of lubricant, typically oil, within the engine. It consists of a long, thin metal or plastic rod with a handle at one end. The other end is inserted into the engine’s oil sump. The dipstick has markings that indicate the minimum and maximum acceptable oil levels. When the dipstick is removed and wiped clean, the oil level can be checked against these markings ¹.

Purpose of the Cummins 3973946 Dipstick

This Cummins part plays a role in the operation of a truck by enabling the measurement of oil levels within the engine. Proper lubrication is necessary for the engine’s moving parts to function smoothly and efficiently. By providing an accurate means to check oil levels, this dipstick helps ensure that the engine remains well-lubricated, which is fundamental to its performance and durability ².

Key Features

The Cummins 3973946 Dipstick is characterized by its robust design and the materials used in its construction. It is typically made from high-quality steel, which offers durability and resistance to the high temperatures and pressures within an engine. The dipstick is also designed with precise markings for accurate oil level measurement. Additionally, its length and diameter are tailored to fit specific engine models, ensuring a snug fit and reliable operation ³.

Benefits

Using the Cummins 3973946 Dipstick offers several advantages. Its design allows for accurate measurement of oil levels, which is crucial for maintaining engine health. The materials used in its construction contribute to its durability, making it resistant to wear and corrosion. Furthermore, the dipstick is easy to use, requiring only simple steps to check the oil level, which facilitates regular maintenance routines ⁴.

Installation Process

To install the Cummins 3973946 Dipstick, first, ensure the engine is turned off and has had sufficient time to cool. Locate the dipstick tube, usually found on the engine’s side. Remove the old dipstick by pulling it straight out of the tube. Insert the new dipstick fully into the tube until it stops, then withdraw it slightly to ensure it is seated correctly. Finally, reinsert the dipstick fully into the tube and secure it in place.

Troubleshooting Common Issues

Common issues with dipsticks may include inaccurate oil level readings or physical damage to the dipstick itself. Inaccurate readings can often be resolved by ensuring the dipstick is fully seated in its tube and by checking for any obstructions within the tube. Physical damage, such as bends or cracks, may require replacement of the dipstick to ensure accurate measurements and proper function.

Maintenance Tips

Regular maintenance of the Cummins 3973946 Dipstick is important for its longevity and accurate performance. This includes cleaning the dipstick after each use to remove any oil residue, which can affect the accuracy of future readings. Inspecting the dipstick for signs of wear or damage and replacing it as necessary will help maintain the engine’s lubrication system’s integrity.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history dating back to 1919, Cummins has established a reputation for quality and innovation in the automotive industry, particularly in diesel engines and components. The company’s commitment to excellence and customer satisfaction has made it a preferred choice for heavy-duty truck manufacturers and operators worldwide.

Cummins Dipstick 3973946 Compatibility with Engine Models

The Cummins Dipstick part number 3973946 is designed to be compatible with a range of engine models. Here is a detailed breakdown of its compatibility:

ISC Series Engines

• ISC CM2150
• ISC CM850
• ISC8.3 CM2250

These engines, part of the ISC series, are designed for various applications, and the dipstick 3973946 is engineered to fit seamlessly within their systems.

QSC Series Engines

• QSC8.3 CM850 (CM2850)
• QSC9 CM2250 / QSL9 CM2250

The QSC series engines, including the QSC8.3 CM850 (CM2850) and QSC9 CM2250 / QSL9 CM2250, are equipped with the dipstick 3973946 to ensure accurate oil level monitoring and maintenance.

QSL Series Engines

• QSL8.9 CM2150 L141
• QSL9 CM2250
• QSL9 CM2350 L102
• QSL9 CM850 (CM2850)

The QSL series engines, such as the QSL8.9 CM2150 L141, QSL9 CM2250, QSL9 CM2350 L102, and QSL9 CM850 (CM2850), also utilize the dipstick 3973946. This part is crucial for maintaining the proper oil levels in these engines, ensuring optimal performance and longevity.

Each of these engines, while differing in specifications and applications, relies on the dipstick 3973946 for essential maintenance tasks. This compatibility ensures that users can maintain their engines effectively with a single, reliable part.

Role of Part 3973946 Dipstick in Engine Systems

The part 3973946 dipstick is an integral component in the maintenance and monitoring of engine systems. It works in conjunction with the oil level gauge to provide accurate readings of the engine oil level.

When the dipstick is inserted into the engine’s oil filler neck, it comes into direct contact with the engine oil. Upon removal, the oil level is indicated by the markings on the dipstick. This information is then interpreted by the oil level gauge, which may be a simple mechanical indicator or a more complex electronic sensor, depending on the engine system.

The dipstick’s role extends beyond mere measurement. It also allows for the visual inspection of the oil’s condition. Engineers and mechanics can assess the oil’s color and consistency, which can provide insights into the engine’s overall health and the oil’s effectiveness.

In more advanced engine systems, the dipstick may be connected to an electronic oil level sensor. This sensor sends real-time data to the engine control unit (ECU), allowing for automated monitoring and alerts if the oil level falls below the safe operating range.

Overall, the part 3973946 dipstick plays a significant role in ensuring the engine operates within safe parameters, contributing to the longevity and efficiency of the engine system.

Conclusion

The Cummins 3973946 Dipstick is a crucial component for maintaining the health and efficiency of heavy-duty truck engines. Its robust design, precise markings, and compatibility with various engine models make it an essential tool for regular maintenance and accurate oil level monitoring. By ensuring proper lubrication, this part contributes significantly to the engine’s performance and longevity.