3974602
Dipstick
Cummins®

Introduction

The Cummins 3974602 Oil Level Dipstick is a component designed for use in heavy-duty trucks, specifically for monitoring engine oil levels. Its role in the maintenance routine of these vehicles is significant, as it allows for the accurate assessment of oil levels, which is vital for ensuring the engine operates within optimal parameters. Proper oil levels are essential for the lubrication, cooling, and overall performance of the engine, making the dipstick an indispensable tool for both routine maintenance and diagnostic procedures.

Basic Concepts of Oil Level Dipsticks

An oil level dipstick is a simple yet vital tool used in internal combustion engines to measure the amount of oil present in the crankcase. The dipstick is typically a metal or plastic rod with a handle at one end, inserted into a tube that leads to the oil sump. When the dipstick is removed and wiped clean, it provides a visual indication of the oil level by the oil residue left on the stick. This process helps ensure that the engine has sufficient lubrication, which is necessary for reducing friction between moving parts, dissipating heat, and preventing wear and damage ¹.

Purpose of the Cummins 3974602 Oil Level Dipstick

The Cummins 3974602 Oil Level Dipstick serves a specific function in the operation and maintenance of a truck’s engine. It facilitates the monitoring of oil levels, ensuring that the engine maintains adequate lubrication. Proper lubrication is fundamental for the engine’s efficiency, longevity, and performance. By providing a straightforward method to check oil levels, the dipstick plays a role in preventing engine damage due to low oil levels and aids in the early detection of oil leaks or consumption issues.

Key Features

The Cummins 3974602 Oil Level Dipstick is characterized by several key features that enhance its functionality and durability. It is constructed from high-quality materials to withstand the harsh conditions within an engine compartment. The design includes a robust handle for easy grip and a clearly marked scale for accurate oil level readings. Additionally, the dipstick may feature a unique shape or coating to improve its resistance to corrosion and wear, ensuring reliable performance over time.

Benefits

Utilizing the Cummins 3974602 Oil Level Dipstick offers several advantages. It contributes to improved engine performance by ensuring optimal oil levels, which are critical for efficient lubrication and cooling. Extended engine life can be achieved through regular monitoring and maintenance of oil levels, reducing the risk of engine wear and damage. Furthermore, the dipstick simplifies maintenance procedures, making it easier for technicians to perform routine checks and adjustments, thereby enhancing overall vehicle reliability and uptime ².

Installation Process

Installing the Cummins 3974602 Oil Level Dipstick involves a few straightforward steps. First, ensure the engine is turned off and has cooled down to avoid burns or injuries. 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 Cummins 3974602 Oil Level Dipstick into the tube until it reaches the bottom, then pull it out slightly to ensure it is seated correctly. Push it back in fully and secure it by replacing the cap. It is important to follow these steps carefully to ensure the dipstick is installed correctly and functions as intended.

Usage Instructions

To use the Cummins 3974602 Oil Level Dipstick for checking oil levels, begin by ensuring the vehicle is on a level surface and the engine is off. Remove the dipstick from the tube and wipe it clean with a lint-free cloth. Reinsert the dipstick fully into the tube, then remove it again to check the oil level. The oil should reach the designated “full” mark on the dipstick. If the level is low, add the recommended type of oil until it reaches the appropriate level. This procedure ensures accurate oil level readings and helps maintain the engine’s health.

Troubleshooting Common Issues

Common issues with the Cummins 3974602 Oil Level Dipstick may include inaccurate readings or difficulty in insertion or removal. Inaccurate readings can often be resolved by ensuring the dipstick is fully seated in the tube and by checking for any obstructions or debris. Difficulty in insertion or removal may indicate a bent dipstick or a misaligned tube, which may require adjustment or replacement. Regular inspection and maintenance can help prevent these issues.

Maintenance Tips

To ensure the longevity and accurate performance of the Cummins 3974602 Oil Level Dipstick, regular maintenance is recommended. This includes cleaning the dipstick after each use to remove oil residue and inspecting it for signs of wear or damage. Additionally, ensuring the dipstick tube is free of debris and properly aligned can help maintain accurate readings and ease of use. Following these maintenance tips can extend the life of the dipstick and ensure reliable operation.

Compatibility

The Cummins Oil Level Dipstick part number 3974602 is designed to fit seamlessly with several models of Cummins engines. This dipstick is a crucial component for maintaining the proper oil levels in the engine, ensuring optimal performance and longevity.

QSB6.7 Series

The 3974602 oil level dipstick is compatible with the following Cummins QSB6.7 engines:

• QSB6.7 CM2250
• QSB6.7 CM850 (CM2850)

These engines are known for their robust design and reliability, often used in various industrial and agricultural applications. The dipstick ensures that the oil levels are checked and maintained correctly, which is essential for the smooth operation of these engines.

QSB7 Series

The 3974602 oil level dipstick also fits the following Cummins QSB7 engine:

• QSB7 CM2880 B117

This engine is part of the QSB7 series, which is designed for heavy-duty applications. The dipstick is engineered to provide accurate oil level readings, helping to prevent engine damage due to low oil levels.

Installation and Usage

When installing the 3974602 oil level dipstick in any of the aforementioned engines, it is important to follow the manufacturer’s guidelines. Proper installation ensures that the dipstick functions correctly, providing reliable oil level readings. Regular checks using this dipstick are essential for maintaining the health of the engine and preventing potential issues related to oil levels.

About Cummins

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a rich history of innovation and quality, Cummins has established a strong reputation in the heavy-duty truck industry. The company is committed to providing reliable, efficient, and durable engine components, including the Cummins 3974602 Oil Level Dipstick, to support the performance and longevity of heavy-duty vehicles. Cummins’ dedication to quality and innovation ensures that their products meet the demanding requirements of the industry.

Conclusion

The Cummins 3974602 Oil Level Dipstick is a vital component for maintaining the health and performance of heavy-duty truck engines. By ensuring accurate oil level readings, this part contributes to efficient lubrication, cooling, and overall engine longevity. Regular maintenance and proper usage of the dipstick are essential for preventing engine damage and ensuring optimal vehicle performance.