4003700
Dipstick Seal
Cummins®

Introduction

The Cummins 4003700 Dipstick Seal is a component designed for use in commercial trucks. Its primary role is to ensure the integrity of the engine’s oil system by sealing the dipstick tube. This seal plays a role in maintaining accurate oil level readings and preventing oil leaks, which are important for the engine’s operation and longevity.

Purpose and Function

The dipstick seal serves to create a tight barrier around the dipstick tube, which is used for checking the engine oil level. By sealing this tube, the dipstick seal helps maintain the engine’s oil pressure and prevents oil from escaping, which could lead to decreased lubrication and potential engine damage. It operates by fitting snugly around the dipstick tube, ensuring that the seal is effective even under the varying conditions experienced by commercial trucks.

Key Features

This Cummins part is constructed from durable materials that are resistant to the high temperatures and pressures found within an engine environment. Its design includes features that enhance its ability to form a secure seal, such as a flexible yet robust material composition that allows it to adapt to the dipstick tube’s shape and size. These characteristics contribute to the seal’s performance and durability in demanding applications.

Benefits

Utilizing the Cummins 4003700 Dipstick Seal can lead to improved engine performance due to its role in maintaining proper oil levels and pressure. The seal’s durable construction and effective design contribute to enhanced engine durability by preventing oil leaks that could otherwise lead to engine wear or damage. Additionally, it ensures reliable oil level maintenance, which is important for the engine’s operation and longevity.

Installation Process

Installing the 4003700 requires careful attention to ensure a secure fit. The process involves removing the old seal, cleaning the dipstick tube, and then placing the new seal around the tube. It may be necessary to use tools to ensure the seal is properly seated. Following manufacturer guidelines for installation is recommended to achieve the best results.

Maintenance Tips

To ensure the longevity and effectiveness of the dipstick seal, regular maintenance practices should be observed. This includes periodic inspections for signs of wear or damage, such as cracks or hardening of the seal material. Addressing these issues promptly can prevent more significant problems, such as oil leaks, from occurring.

Troubleshooting Common Issues

Common problems associated with dipstick seals include oil leaks and difficulty in inserting the dipstick. Oil leaks may indicate a failed seal, requiring replacement. Difficulty in inserting the dipstick could suggest that the seal is worn or improperly installed. Addressing these issues typically involves inspecting the seal for damage and ensuring it is correctly installed.

Cummins Overview

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 a reputation for quality and reliability in the commercial truck industry. Its product range includes engines, powertrains, and aftermarket parts, all designed to meet the demanding requirements of commercial applications.

Cummins Engine Dipstick Seal Compatibility

The Cummins Dipstick Seal part number 4003700 is designed to fit a variety of Cummins engines, ensuring a secure seal for the oil dipstick. This part is important for maintaining the integrity of the engine’s oil system by preventing leaks and contamination.

Compatible Engines

• 6B5.9: This engine model benefits from the 4003700 seal, which ensures the dipstick remains tightly sealed, protecting the oil system from external contaminants.
• G8.3: The G8.3 engine also utilizes the 4003700 seal, providing a reliable barrier against leaks and maintaining optimal oil levels.
• QSB5.9 CM850 and QSB6.7 M CM2250: Both these models are compatible with the 4003700 seal. The seal’s design allows it to fit snugly around the dipstick, ensuring that the oil remains clean and at the correct level.

The 4003700 seal is engineered to work seamlessly with these engines, providing a consistent and reliable seal that is important for engine performance and longevity.

Role of Part 4003700 Dipstick Seal in Engine Systems

This Cummins part is an important component in maintaining the integrity and functionality of several key engine systems. Its primary role is to ensure a secure and leak-free connection between the dipstick and the engine block. This seal is instrumental in the accurate measurement and monitoring of the oil level within the engine.

Integration with the Dipstick

The Dipstick Seal fits snugly around the dipstick tube, preventing any oil leakage that could occur around the dipstick itself. This ensures that the oil level readings provided by the dipstick are accurate and reliable. Without a proper seal, oil could seep out, leading to incorrect oil level indications and potential engine damage due to insufficient lubrication.

Interaction with the Oil Level Gauge

In systems where an oil level gauge is employed, the Dipstick Seal plays a supportive role by maintaining the oil level within the specified range. The gauge relies on consistent and accurate oil levels to provide reliable readings. A well-fitted seal ensures that the oil does not escape, thereby allowing the gauge to function correctly and provide precise measurements.

Contribution to the Oil Gauge Level System

For engines equipped with an oil gauge level system, the Dipstick Seal is equally important. This system often includes a float or sensor that detects the oil level. A secure seal around the dipstick ensures that the oil remains at the correct level, allowing the sensor to accurately detect and report the oil status. This is vital for maintaining optimal engine performance and preventing issues related to low oil levels.

Conclusion

In summary, the 4003700 Dipstick Seal is a fundamental component in ensuring the accurate measurement and maintenance of oil levels within engine systems. Its proper installation and function are key to the reliable operation of dipsticks, oil level gauges, and oil gauge level systems.