3904287
Dipstick
Cummins®

The Cummins 3904287 Dipstick is a specialized component designed for use in heavy-duty trucks. It plays a role in the maintenance and operation of these vehicles by allowing for the accurate measurement of engine oil levels. Proper lubrication is fundamental to the longevity and efficiency of a truck’s engine, making the dipstick an important tool for ensuring that oil levels are maintained within the required parameters ¹.

Basic Concepts of a Dipstick

A dipstick is a simple yet important tool used in internal combustion engines to measure the level of lubricant within the engine’s oil reservoir. It typically consists of a long, slender metal or plastic rod with a handle at one end. The other end is inserted into the oil reservoir through a tube. The dipstick is marked with graduated measurements that allow the user to determine the current oil level. When the dipstick is removed and wiped clean, reinserted, and then removed again, the oil level can be read against these markings.

Purpose of the Cummins 3904287 Dipstick

The Cummins 3904287 Dipstick is specifically engineered to facilitate the measurement of oil levels in Cummins engines found in heavy-duty trucks. Its role is to provide a reliable means of checking the oil level, ensuring that the engine remains properly lubricated. Adequate lubrication is necessary for reducing friction between moving parts, cooling the engine, and carrying away contaminants. The dipstick allows for regular monitoring of oil levels, which is a key aspect of preventive maintenance ¹.

Key Features

The Cummins 3904287 Dipstick is designed with several features that enhance its performance and durability. It is constructed from high-quality materials that can withstand the harsh conditions within an engine compartment. The dipstick is also precision-engineered to fit snugly into the oil reservoir, ensuring accurate readings. Additionally, it is marked with clear, easy-to-read graduations for precise oil level measurement.

Benefits

Using the Cummins 3904287 Dipstick offers several advantages. Its design ensures improved accuracy in oil level readings, which is important for maintaining engine health. The durable construction of the dipstick means it can withstand the rigors of heavy-duty use, providing long-lasting performance. Furthermore, the ease of use and clear markings on the dipstick make it a convenient tool for regular maintenance checks.

Installation Process

To install the Cummins 3904287 Dipstick, first, ensure the engine is turned off and has cooled down to avoid burns. Locate the dipstick tube, which is usually found on the side of the engine block. Remove the old dipstick by pulling it straight out of the tube. Insert the new Cummins 3904287 Dipstick into the tube until it is fully seated. Push it in gently but firmly to ensure a proper fit. Once installed, the dipstick can be used to check the oil level as per the manufacturer’s instructions.

Usage Instructions

To use the Cummins 3904287 Dipstick to check oil levels, start by ensuring the truck is on a level surface and the engine is off. Pull the dipstick out of the tube and wipe it clean with a lint-free cloth. Reinsert the dipstick fully into the tube and then remove it again to check the oil level. The oil should reach the appropriate mark on the dipstick. If the level is low, add the recommended type of oil until it reaches the correct level.

Troubleshooting Common Issues

Common issues with the Cummins 3904287 Dipstick may include inaccurate readings or difficulty in insertion. If readings are inconsistent, ensure the dipstick is fully seated in the tube and that the engine is on a level surface. If insertion is difficult, check for obstructions in the tube or ensure the dipstick is aligned correctly. Regular cleaning and inspection can help prevent these issues.

Maintenance Tips

To ensure the longevity and reliable performance of the Cummins 3904287 Dipstick, regular maintenance is recommended. This includes cleaning the dipstick after each use to remove any oil residue and checking for any signs of wear or damage. If the dipstick becomes bent or shows signs of significant wear, it should be replaced to maintain accurate oil level readings.

Manufacturer Information - Cummins

Cummins is a well-established manufacturer with a strong reputation in the automotive and heavy-duty truck industries. Known for their commitment to quality and innovation, Cummins produces a wide range of components designed to enhance the performance and reliability of engines. Their products are engineered to meet the demanding requirements of heavy-duty applications, ensuring durability and efficiency in operation.

Cummins Engine Dipstick Compatibility

The Cummins part number 3904287, which is a Dipstick, is designed to be compatible with several engine models. This dipstick is important for checking the oil level in the engine, ensuring that the engine operates smoothly and efficiently.

Compatible Engines

• 4B3.9 and B4.5 Engines

The dipstick 3904287 is specifically engineered to fit the 4B3.9 and B4.5 engines. These engines are known for their reliability and performance, often used in various applications ranging from agricultural to industrial use. The dipstick ensures that the oil level is maintained within the optimal range, preventing engine damage due to low oil levels.

• QSB3.9 30 CM550 Engine

The Cummins QSB3.9 30 CM550 engine also utilizes the dipstick 3904287. This engine is part of the QSB series, which is designed for heavy-duty applications. The dipstick’s design allows for accurate oil level readings, which is important for the longevity and performance of the engine.

Installation and Usage

When installing the dipstick 3904287, it is important to follow the manufacturer’s guidelines to ensure proper fit and function. The dipstick should be inserted into the designated oil level check port until it reaches the bottom. After pulling it out, the oil level can be checked against the markings on the dipstick. This process should be performed regularly to maintain the engine’s health.

Role of Part 3904287 Dipstick in Engine Systems

The part 3904287 dipstick is an important component in the maintenance and monitoring of engine systems. It works in conjunction with several key components to ensure the engine operates efficiently and safely.

Interaction with the Oil Level

The primary function of the dipstick is to provide a means of checking the oil level within the engine. When inserted into the oil filler tube, the dipstick comes into direct contact with the engine oil. Upon removal, the oil level can be read from the markings on the dipstick, indicating whether the oil is at the appropriate level. This is vital for maintaining proper lubrication of the engine’s moving parts, which includes the crankshaft, camshaft, pistons, and bearings. Adequate oil levels prevent excessive wear and potential damage to these components ¹.

Connection to the Gauge

While the dipstick itself does not directly interface with a gauge, the information it provides is often used in conjunction with oil pressure gauges and other monitoring systems. The oil level reading from the dipstick can inform adjustments or indicate potential issues that might be reflected in the oil pressure readings. For instance, if the oil level is consistently low, it may suggest a leak or excessive consumption, which could affect oil pressure and engine performance.

Conclusion

In summary, the Cummins 3904287 Dipstick plays a significant role in the routine maintenance and operational monitoring of engine systems by facilitating accurate oil level checks, which in turn supports the overall health and efficiency of the engine.