3974256
Oil Gauge Tube
Cummins®

Introduction

The Cummins 3974256 Oil Gauge Tube is a component designed for use in heavy-duty trucks. It serves a specific function within the engine system, contributing to the overall operation and maintenance of the vehicle. Understanding its purpose and significance is key to ensuring the efficient and reliable performance of heavy-duty trucks.

Basic Concepts of Oil Gauge Tubes

An oil gauge tube is a part of the engine system that facilitates the measurement of oil levels within the engine. It connects to the oil gauge, allowing for the accurate monitoring of oil levels. This monitoring is vital for maintaining engine health, as it ensures that the engine operates within safe parameters and that oil changes are performed at appropriate intervals ¹.

Purpose of the Cummins 3974256 Oil Gauge Tube

The Cummins 3974256 Oil Gauge Tube plays a role in the operation of a truck by providing a pathway for oil to reach the gauge, thereby enabling accurate oil level measurement. This accurate measurement is important for maintaining engine performance, as it allows for timely oil changes and helps prevent engine damage due to low oil levels ².

Key Features

The Cummins 3974256 is constructed from durable materials, ensuring longevity and resistance to the harsh conditions within an engine. Its design includes precise fittings that ensure a secure connection to both the engine and the oil gauge. Additionally, it may feature unique attributes such as anti-corrosion coatings or reinforced sections to enhance its functionality and durability.

Benefits

Using the Cummins 3974256 can lead to improved engine longevity, as accurate oil level readings help maintain optimal engine conditions. It also contributes to enhanced performance by ensuring that the engine operates with the correct amount of lubrication. Furthermore, reliable oil level readings provided by this tube can aid in the early detection of potential issues, allowing for timely maintenance and repairs.

Installation Process

Installing the Cummins 3974256 involves several steps to ensure proper fitting. First, the engine must be prepared, which may include draining oil to reduce pressure. Next, the old tube, if present, is removed, and the new tube is installed, ensuring all connections are secure. Tools required may include wrenches and possibly a torque wrench to achieve the correct tightness on fittings. Following manufacturer guidelines during installation is recommended to ensure correct fitting.

Troubleshooting Common Issues

Common problems with the Cummins 3974256 may include inaccurate readings or leaks. Inaccurate readings can often be traced to a faulty connection or a blockage within the tube. Leaks may indicate a damaged tube or improper installation. Troubleshooting steps include checking all connections for tightness, inspecting the tube for damage, and ensuring that the gauge itself is functioning correctly.

Maintenance Tips

Regular maintenance of the Cummins 3974256 is important for ensuring its longevity and optimal performance. This includes periodic inspection for signs of wear or damage, cleaning the tube and its connections to remove any buildup, and ensuring that all connections remain tight. Following these maintenance tips can help prevent issues and ensure accurate oil level readings.

Compatibility of Oil Gauge Tube Part 3974256 with Cummins Engines

The Oil Gauge Tube part number 3974256, manufactured by Cummins, is designed to fit a range of Cummins engines. This part is integral for monitoring the oil level in the engine, ensuring that the engine operates within safe parameters. Below is a detailed description of the engines with which this oil gauge tube is compatible:

ISB Series

• ISB CM2150
• ISB/ISD4.5 CM2150 B119
• ISB/ISD6.7 CM2150 SN
• ISB6.7 CM2250
• ISB6.7 CM2350 B101
• ISB6.7 G CM2180 B118
• ISBE CM2150
• ISBE4 CM850

QSB Series

• QSB4.5 CM2250 EC
• QSB4.5 CM850 (CM2850)
• QSB6.7 CM2250
• QSB6.7 CM2350 B105
• QSB6.7 CM850 (CM2850)
• QSB7 CM2880 B117

Other Series

• QSC8.3 CM850 (CM2850)
• QSL9 CM2250
• QSL9 CM2350 L102

This oil gauge tube is engineered to provide accurate readings of the oil level, which is crucial for maintaining engine health and preventing potential damage due to low oil levels. The compatibility across various Cummins engine models highlights the versatility and reliability of this part in different engine configurations.

Role of Part 3974256 in Engine Systems

The 3974256 is an integral component in the accurate measurement and monitoring of oil levels within an engine system. This tube facilitates the connection between the oil reservoir and the oil level gauge, ensuring that the gauge receives precise readings of the oil level.

When the engine is operational, the oil circulates through various components, including the crankshaft, camshaft, and pistons, providing necessary lubrication. As the oil level fluctuates due to consumption and temperature changes, the Oil Gauge Tube plays a significant role in transmitting these changes to the oil level gauge.

The dipstick, which is inserted into the Oil Gauge Tube, allows for manual checking of the oil level. When the dipstick is removed and reinserted, it provides a physical indicator of the oil level, which can be cross-verified with the gauge reading.

The Oil Gauge Tube also ensures that the oil level gauge remains calibrated and accurate over time. By maintaining a consistent pathway for the oil to travel, it prevents any discrepancies that might arise from blockages or misalignments.

Conclusion

In summary, the Cummins 3974256 Oil Gauge Tube is essential for the reliable operation of the oil level gauge and the overall maintenance of the engine’s lubrication system. Its accurate measurement capabilities contribute significantly to engine health and performance, making it a critical component in heavy-duty truck engines.