National 50151S Steering Gear Sector Shaft Seal - Rear Outer

Overview of National 50151S Steering Gear Sector Shaft Seal

The National 50151S steering gear sector shaft seal is engineered to provide reliable sealing performance for select Buick, Chevrolet, Oldsmobile, and Pontiac models. Designed with durable nitrile material, this oil seal helps maintain proper steering system function by preventing fluid leaks and contamination.

• Inside diameter: 1.125 inches (28.580 mm)
• Outside diameter: 1.565 inches (39.750 mm)
• Thickness/width: 0.375 inches (9.530 mm)
• Sealing material: Nitrile for resistance to oil and wear
• Housing bore compatibility: 1.561 inches (39.650 mm)
• Part number: 50151S
• Compatible with various Buick, Chevrolet, Oldsmobile, and Pontiac models

Detailed Product Description

This National steering gear sector shaft seal (part number 50151S) is part of the 50000 series and is specifically designed to fit steering systems requiring a 1.125-inch shaft diameter and a 1.565-inch outside diameter. Constructed from nitrile, the seal offers effective resistance against oil degradation and mechanical wear, ensuring a tight seal around the steering gear sector shaft. The 0.375-inch thickness provides durability while maintaining proper fit within the housing bore of approximately 1.561 inches. This seal is suitable for use in classic and vintage vehicles including Buick models like the Century and LeSabre, Chevrolet models such as the Bel Air and Impala, Oldsmobile Cutlass and 88, as well as Pontiac Grand Prix and Catalina.

Common Applications and Problem Solving

• Prevents oil leaks from the steering gear sector shaft
• Protects steering components from dirt and debris contamination
• Maintains hydraulic pressure within the steering system
• Reduces premature wear of steering gear components
• Helps restore proper steering response and safety

Installation Notes and Tips

• Ensure the housing bore and shaft are clean and free of debris before installation
• Lubricate the seal lip with compatible oil to ease installation and prevent damage
• Use proper tools to press the seal evenly into the housing bore without distortion
• Verify correct orientation of the seal to maintain effective sealing
• Inspect the steering gear sector shaft for wear or damage prior to seal replacement

Quality Assurance and Warranty

National manufactures the 50151S steering gear sector shaft seal to meet industry standards for durability and performance. The nitrile material is selected for its resistance to oil and environmental factors commonly encountered in automotive steering systems. While specific warranty details may vary, National products typically come with a limited warranty against manufacturing defects to ensure customer confidence in product reliability.