3803994 3095278 QSK38 QSK50 Cummins Engine Spare Parts Crankshaft Oil Seal

The QSK38/QSK50 Cummins Engine Crankshaft Oil Seal is a critical component engineered to prevent oil leakage and protect engine integrity in demanding environments. Specifically designed for Cummins' QSK38 and QSK50 series engines, this oil seal ensures optimal lubrication system performance by maintaining crankshaft chamber pressure and blocking contaminants. Its precision design meets OEM specifications, guaranteeing seamless compatibility and reliability. Ideal for heavy-duty applications, this seal reduces downtime and maintenance costs by extending engine life through superior leak prevention.

Constructed from high-performance nitrile rubber (NBR) or fluorocarbon (FKM) elastomers, this oil seal offers exceptional resistance to heat, abrasion, and oil degradation. The sealing lip is reinforced with a corrosion-resistant stainless steel garter spring, ensuring consistent tension and contact with the crankshaft. The outer casing, made from powdered metal or rubber-coated steel, provides a secure fit within the engine housing. These materials are selected for their compatibility with synthetic and mineral oils, as well as their ability to withstand temperatures ranging from -40°F to 300°F (-40°C to 149°C).

Heavy-Duty Trucks: Maintains engine efficiency in long-haul transportation.

Industrial Generators: Ensures uninterrupted power supply in manufacturing and construction.

Marine Engines: Resists saltwater corrosion in marine propulsion systems.

Mining Equipment: Withstands abrasive dust and extreme loads in excavators and haul trucks.

Agricultural Machinery: Protects against dirt and moisture in tractors and harvesters.

High-Temperature Resilience: Fluorocarbon variants excel in extreme heat, ideal for turbocharged engines.

Contaminant Exclusion: Dual-lipped design blocks external debris and retains internal lubricants.

Dynamic Sealing: Accommodates crankshaft oscillations and minor misalignments without wear.

Long Service Life: Engineered to endure 10,000+ hours under standard operating conditions.

OEM Compliance: Matches original dimensions and performance, ensuring hassle-free replacement.