3939117
Dipstick
Cummins®

Introduction

The Cummins 3939117 Dipstick is a component designed for use in commercial trucks, specifically for monitoring the oil level within the engine. Its role is significant in the maintenance and operation of these vehicles, ensuring that the engine remains properly lubricated and functions efficiently ².

Basic Concepts of a Dipstick

A dipstick is a simple yet vital tool used in engines to measure the level of fluid, typically oil. It consists of a long, thin metal or plastic rod with a handle at one end. The rod is inserted into a tube connected to the oil reservoir. When removed, the oil level can be read from markings on the dipstick, indicating whether the fluid is within the appropriate range ¹.

Purpose of the Cummins 3939117 Dipstick

The Cummins 3939117 Dipstick serves a specific function in the lubrication system of a truck’s engine. It allows for the accurate measurement of oil levels, ensuring that there is sufficient lubrication for the engine’s moving parts. Proper lubrication is key to reducing friction, wear, and heat, thereby contributing to the engine’s overall performance and longevity ².

Key Features

The Cummins 3939117 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 may also feature a bright tip for easy visibility and clear, precise markings for accurate oil level readings ².

Benefits

Using the Cummins 3939117 Dipstick offers several advantages. Its design ensures accurate measurement of oil levels, which is crucial for maintaining engine health. The durability of the materials used means it can withstand the demanding conditions within a commercial truck engine. Additionally, its ease of use makes it a practical tool for regular maintenance checks ².

Installation Process

Installing the Cummins 3939117 Dipstick involves a few straightforward steps. First, locate the dipstick tube on the engine. 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. Push it back in fully and secure the cap to prevent oil leaks ².

Usage Instructions

To use the Cummins 3939117 Dipstick for checking oil levels, park the truck on a level surface and ensure the engine is off and cool. Remove the dipstick, wipe it clean with a lint-free cloth, reinsert it fully, then withdraw it again to check the oil level. The oil should be between the minimum and maximum marks. If it is low, add the recommended type of oil until it reaches the appropriate level ².

Maintenance Tips

To maintain the Cummins 3939117 Dipstick, regularly clean it with a lint-free cloth after each use to remove any oil residue. Inspect it for signs of wear or damage, such as bends or cracks, and replace it if necessary to ensure accurate readings and prevent oil leaks ².

Troubleshooting Common Issues

Common issues with the Cummins 3939117 Dipstick may include inaccurate readings or difficulty in insertion. Inaccurate readings can often be resolved by ensuring the dipstick is fully seated and the engine is on a level surface. If insertion is difficult, check for obstructions in the dipstick tube and clean if necessary ².

Cummins Engine Dipstick Compatibility

The Cummins part number 3939117, which is a Dipstick, is designed to fit a variety of Cummins engines. Below is a detailed description of the compatibility of this dipstick with the listed engine models:

• ISF3.8 CM2220 AN and ISL CM2150: The dipstick 3939117 is compatible with these engines, ensuring accurate oil level readings.
• ISL G CM2180 and ISL9 CM2150 SN: These engines are typically used in various industrial and commercial applications, and the dipstick ensures that users can easily check the oil levels.
• ISL9 CM2250: This engine is part of Cummins’ lineup of high-performance diesel engines, and the dipstick is engineered to provide precise oil level readings.
• ISL9.5 CM2880 L138: The dipstick 3939117 is also suitable for this engine, known for its robust performance and used in heavy-duty applications.
• L8.9 and L8.9 L121: The dipstick fits both these engines, part of Cummins’ range of smaller diesel engines, commonly used in various applications.
• L9.5 L117: This engine is part of Cummins’ lineup of mid-range diesel engines, and the dipstick ensures that users can easily check the oil levels.
• QSL8.9 CM2150 L141: The dipstick 3939117 is compatible with this engine, known for its efficiency and reliability.
• QSL9 CM2250 and QSL9 CM2350 L102: These engines are part of Cummins’ lineup of high-performance diesel engines, and the dipstick ensures that users can easily monitor the oil levels.
• QSL9 CM554 and QSL9 CM850 (CM2850): Lastly, the dipstick 3939117 is compatible with these engines, part of Cummins’ range of diesel engines, ensuring accurate oil level readings for these models ².

Role of Part 3939117 Dipstick in Engine Systems

The part 3939117 dipstick is a fundamental component in the engine system, facilitating the monitoring and maintenance of oil levels and quality. Its integration with the oil level gauge enhances the engine’s reliability and performance, making it an indispensable tool for engineers and mechanics ².

Conclusion

The Cummins 3939117 Dipstick plays a crucial role in the maintenance and operation of commercial truck engines. By ensuring accurate oil level readings and facilitating the assessment of oil quality, this part contributes to the engine’s overall performance and longevity. Regular maintenance and proper usage of the dipstick are essential for optimal engine health and efficiency ².