3968031
Plain Washer
Cummins®

The 3968031 Plain Washer, manufactured by Cummins, is a critical component in the automotive and heavy-duty truck industries. This washer is essential in commercial truck applications, enhancing the efficiency and reliability of mechanical assemblies. Plain washers, in general, are vital for distributing loads, providing a smooth surface for fasteners, and ensuring the stability of mechanical connections ².

Basic Concepts of Plain Washers

Plain washers are fundamental components in mechanical systems. Their primary function is to distribute the load of fasteners, such as bolts or nuts, over a larger area, reducing pressure on the surface material. This protects the surface from damage and ensures a secure fastening. Typically made from materials like steel, stainless steel, or brass, plain washers are chosen for their durability, corrosion resistance, and ability to withstand high loads ¹.

Purpose of the 3968031 Plain Washer in Truck Operations

The 3968031 Plain Washer is designed for use in commercial trucks. It is utilized in various applications requiring secure fastening, such as the assembly of truck bodies, undercarriage components, and critical engine parts. Its role is to ensure even distribution of fasteners, maintaining the structural integrity and longevity of the truck’s components ².

Key Features of the 3968031 Plain Washer

This Cummins part is characterized by its robust design and material composition. Typically made from high-quality steel, it ensures durability and resistance to wear and tear. The washer’s design allows for even load distribution, crucial in heavy-duty applications. Its smooth surface facilitates easy installation and removal of fasteners, contributing to efficient maintenance and repair processes ¹.

Benefits of Using the 3968031 Plain Washer

Incorporating this washer into truck assemblies offers several advantages. It aids in evenly distributing loads, enhancing the security of fastenings, and reducing the risk of loosening over time. Its durable construction contributes to the longevity of fasteners, ensuring reliable performance in demanding truck operations ².

Installation and Usage Guidelines

Proper installation of the 3968031 Plain Washer is essential for its effective functioning. It should be placed under the head of a bolt or nut to ensure even load distribution. During installation, it is important to ensure that the washer is correctly aligned and not twisted, as this could lead to uneven load distribution and potential failure of the fastening. Regular checks during maintenance can help ensure that the washer remains in good condition and is functioning as intended ¹.

Troubleshooting and Maintenance

Common issues with plain washers include wear and tear, corrosion, and deformation. Regular inspection during maintenance can help identify these issues early. If a washer shows signs of damage or wear, it should be replaced to maintain the integrity of the fastening. Proper storage in a dry, corrosion-resistant environment can also help prolong the life of the washer ².

Cummins: A Brief Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. Known for its commitment to quality, innovation, and customer satisfaction, Cummins offers a variety of components and systems designed to enhance vehicle and equipment performance, efficiency, and reliability ¹.

Compatibility of Cummins Engine Part 3968031: Plain Washer

The Cummins part 3968031, a Plain Washer, is compatible with various Cummins engine models. This washer ensures a smooth and secure fit, maintaining proper alignment and sealing in the engine assembly. Below is a detailed look at the compatibility of this washer with specific Cummins engine models:

ISX12 Series

• ISX12 CM2350 X102
• ISX12 G CM2180 EJ
• ISX12/ISX11.9 CM2250

ISZ13 Series

• ISZ13 CM2150 Z105

KTA19 Series

• KTA19GC CM558

QSB6.7 Series

• QSB6.7 M CM2250

QSK60 Series

• QSK60G

QSM11 Series

• QSM11 CM570

QST30 Series

• QST30 CM552

QSX11.9 Series

• QSX11.9 CM2250 ECF

QSZ13 Series

• QSZ13 CM2150 Z101
• QSZ13 CM2150 Z102

Z13 Series

• Z13 Z108G

This washer is a versatile and essential component in various Cummins engine models, ensuring proper alignment and sealing for optimal engine performance ¹.

Role of Part 3968031 Plain Washer in Various Engine Systems

The 3968031 Plain Washer is integral to numerous engine systems, facilitating smooth operation and ensuring the integrity of various assemblies. Here’s how it integrates with different components:

Adapter and Rear Drive

The Plain Washer provides a smooth surface between mating parts, reducing friction and wear in high-torque applications.

Aid and Coolant Heater Starting

It ensures proper sealing and alignment, maintaining the efficiency of the heating process, which is vital for cold-start performance in engines.

Air Cleaner Mounting

The washer secures the assembly to the engine block or intake manifold, distributing the load evenly and preventing air leaks.

Crankshaft Seal Installer

It maintains the correct spacing and alignment, ensuring the seal functions effectively and prevents oil leaks.

Cylinder Head Lifting Fixture

The washer provides a stable and even surface for the lifting points, important for safely and efficiently removing and installing cylinder heads.

Installer Kit

Included in installer kits to facilitate the proper installation of various engine components, ensuring correct alignment and no undue stress on the components.

Leak Test Kit

Used to create a reliable seal between test equipment and engine components, essential for accurate leak detection.

Lubricating Oil Pump

Maintains the proper clearance between moving parts, ensuring efficient oil flow and reducing the risk of pump failure.

Module and Fuel Control

Ensures secure and leak-free connections in fuel control modules, important for maintaining precise fuel delivery.

Mounting Components

Provides a stable and corrosion-resistant interface for air cleaner, fuel filter, and generator mountings, prolonging the life of the mounting hardware.

Plumbing and Engine Systems

Ensures tight and leak-free connections in applications such as air starters, coolant heater starting aids, engine oil primers, and fuel filters.

Pump and Auxiliary Systems

Ensures proper alignment and sealing of auxiliary pumps, contributing to reliable operation and consistent lubrication of engine parts.

Replacer Fixture and Sensor Applications

Provides a stable mounting surface and ensures accurate sensor readings in replacer fixtures and engine coolant level sensors.

Separator and Support Systems

Maintains the structural integrity and alignment of fuel water separators and rear engine supports.

Engine Cooling and Monitoring Systems

Ensures secure and leak-free connections and mounting points, maintaining the efficiency of the cooling system and the accuracy of engine monitoring data ².

Conclusion

The 3968031 Plain Washer is a vital component in the automotive and heavy-duty truck industries, particularly in commercial truck applications. Its role in distributing loads, providing a smooth surface for fasteners, and enhancing the stability of mechanical connections is crucial for the efficiency and reliability of mechanical assemblies. Proper installation, regular maintenance, and understanding its compatibility with various Cummins engine models are essential for optimal performance and longevity of the components it supports.