National 471646 Power Steering Pump Shaft Seal

Overview of National Power Steering Pump Shaft Seal 471646

The National Power Steering Pump Shaft Seal 471646 is designed specifically for Buick Roadmaster models, providing reliable sealing performance. Manufactured from durable nitrile material, this oil seal ensures effective containment of power steering fluid to maintain system integrity.

• Inside diameter: 0.875 inch (22.230 mm)
• Outside diameter: 1.628 inch (41.350 mm)
• Thickness/width: 0.250 inch (6.350 mm)
• Material: Nitrile for resistance to oil and wear
• Redicoat finish for enhanced corrosion protection
• Housing bore size: 1.624 inch (41.250 mm)
• Part number: 471646, zero duplication part

Detailed Product Description

This power steering pump shaft seal from National is engineered to meet the precise specifications required for the Buick Roadmaster. The seal features a 0.875 inch inside diameter to fit the pump shaft securely, while the 1.628 inch outside diameter matches the housing bore for a tight fit. Constructed from nitrile, the seal offers excellent resistance to hydraulic fluids and temperature variations commonly encountered in power steering systems. The 0.250 inch thickness provides durability without compromising flexibility. Additionally, the Redicoat finish helps prevent corrosion, extending the service life of the seal.

Compatible Applications and Common Issues Addressed

This power steering pump shaft seal is compatible with Buick Roadmaster vehicles requiring part number 471646. It is designed to address common power steering system problems such as:

• Fluid leaks around the power steering pump shaft
• Loss of hydraulic pressure due to seal failure
• Contamination ingress causing premature pump wear
• Noise or vibration from worn or damaged seals
• Reduced steering responsiveness linked to fluid leakage

Installation Notes and Tips

When installing the National 471646 power steering pump shaft seal, ensure the following for optimal performance:

• Clean the housing bore and shaft thoroughly before installation
• Inspect the pump shaft for wear or damage and replace if necessary
• Use appropriate tools to press the seal evenly into the housing bore
• Apply a light coating of power steering fluid to the seal lip before installation
• Verify proper alignment to avoid seal distortion or leaks

Quality Assurance and Warranty Information

National manufactures this power steering pump shaft seal to meet industry standards for durability and performance. The part number 471646 is a zero duplication part, ensuring authenticity and fitment accuracy for Buick Roadmaster models. While specific warranty details may vary, National typically backs its sealing products with a limited warranty against defects in materials and workmanship.