O Ring Seal 3090126 for Cummins Engine Parts

The 3090126 O-ring is a precision sealing component designed for high-pressure fluid systems in industrial and mobile equipment. With a 3.5mm cross-section and 210mm inner diameter, this seal meets ISO 3601-1 standards for:

Hydraulic cylinders (excavators, loaders)
Pneumatic valves (manufacturing automation)
Rotary shaft seals (pump drives)

This engineering analysis covers:

Material compatibility charts for aggressive media
Compression set testing methodologies
Installation best practices from SAE J200 standards

Categories: Foton truck parts, Truck Parts Tag: 3090126，O-Ring Seal

Description

Description

Introduction

The O Ring Seal 3090126 is a vital sealing component widely used in Cummins diesel engines to prevent fluid or gas leakage between assembled engine parts. Engineered to withstand high pressure, temperature, and chemical exposure, this OEM-quality O-ring ensures leak-proof operation in key engine systems, including fuel injectors, oil passages, coolant circuits, and turbochargers. This article details its functions, features, applications, and best practices for installation and maintenance.

What Is the Function of O Ring 3090126?

The 3090126 O-ring is a circular elastomer ring designed to fit into a groove and compress during installation between two surfaces. When compressed, it forms a tight, durable seal that prevents leaks. In Cummins engine systems, it is typically used to seal:

Oil lines and oil cooler assemblies
Fuel injection components
Turbocharger oil return or coolant lines
Engine block connectors

Its elasticity and chemical resistance make it ideal for use in high-performance, high-temperature diesel environments.

Key Features of O Ring Seal 3090126

OEM-Standard Quality
Manufactured to meet Cummins’ exact specifications for dimensional accuracy and material integrity.
High Temperature Resistance
Maintains sealing properties in temperatures exceeding 150°C, making it ideal for engine and turbocharger zones.
Excellent Chemical Compatibility
Resistant to oil, diesel, coolant, and hydraulic fluids commonly used in diesel engines.
Flexible and Durable
Engineered from high-grade rubber (typically NBR or FKM), ensuring long service life under pressure and vibration.

Common Applications

This O-ring is suitable for a wide range of Cummins diesel engines, including:

ISX / QSX series
ISB / QSB 6.7
ISL / QSL9
NT855 / M11 / KTA19 / QSK系列

It is used in:

Oil seals in engine block and filter bases
Coolant system connections
High-pressure fuel system seals
Air compressor or turbo oil return lines

Technical Specifications

Parameter	Details
Product Name	O Ring Seal
Part Number	3090126
Condition	100% Original / New
Material	NBR / FKM Rubber (depending on spec)
Application	Cummins Diesel Engines
Heat Resistance	Up to 200°C
Pressure Resistance	High-pressure sealing performance
Compatible Engine Models	ISX, QSB, ISL, M11, etc.
MOQ	1 Piece
Warranty	6 Months
Packing	Neutral or Original Packing
Shipping Options	DHL, FedEx, UPS, Sea, Air
Customization	OEM / ODM Available
After-Sales Support	Technical Guidance Available

Installation Tips

Clean and Lubricate
Always clean the sealing surface and apply compatible engine oil or grease before installation.
Avoid Overstretching
Stretching the O-ring too much can deform its shape, leading to improper sealing.
Use Correct Torque
Over-tightening engine parts can crush the O-ring and shorten its lifespan.
Replace During Overhaul
It’s recommended to replace all O-rings during engine overhauls or major repairs to ensure sealing integrity.

Conclusion

The O Ring Seal 3090126 is a small yet indispensable component that plays a crucial role in the performance and longevity of Cummins diesel engines. With its high-quality material, heat resistance, and wide compatibility, it ensures leak-proof operation under demanding conditions. Whether you are a repair technician, parts reseller, or equipment fleet manager, having the right sealing solution like 3090126 guarantees reliability and peace of mind.

O Ring Seal 3090126 for Cummins Engine Parts

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