National 471645 Steering Gear Worm Shaft Seal

Overview of National Steering Gear Worm Shaft Seal 471645

The National Steering Gear Worm Shaft Seal 471645 is designed to provide reliable sealing performance for steering systems in select Ford, Lincoln, Mazda, and Mercury vehicles. Engineered with nitrile material and Redicoat technology, this oil seal ensures durability and effective protection against leaks.

• Inside diameter: 0.812 inch (20.620 mm)
• Outside diameter: 1.628 inch (41.350 mm)
• Thickness/width: 0.250 inch (6.350 mm)
• Sealing material: Nitrile for resistance to oil and wear
• Redicoat coating for enhanced corrosion resistance
• Housing bore size: 1.624 inch (41.250 mm)
• Part number: 471645

Detailed Product Description

This steering gear worm shaft seal from National is part of the 470000 series and is specifically designed as an oil seal to maintain the integrity of the steering gear assembly. The nitrile material offers excellent resistance to petroleum-based fluids and mechanical wear, making it suitable for the demanding conditions found in automotive steering systems. The Redicoat finish adds a protective layer to prevent corrosion and extend the seal's service life. With precise dimensions including a 0.812 inch shaft diameter and 1.628 inch outside diameter, this seal fits tightly within the housing bore of 1.624 inches, ensuring a secure and leak-free installation.

Compatible Vehicles and Applications

This steering gear worm shaft seal 471645 is compatible with a range of Ford, Lincoln, Mazda, and Mercury models, including but not limited to:

• Ford Bronco, F-150, Mustang, Explorer, Ranger, and Econoline series
• Lincoln Continental, Mark VI, Mark VII, Mark VIII, Town Car, and Versailles
• Mazda B2300, B2500, B3000, B4000, and Navajo
• Mercury Cougar, Grand Marquis, Marquis, and Sable

It is designed to replace worn or damaged steering gear seals in these vehicles, helping maintain proper steering function and preventing fluid leaks.

Common Issues Addressed by This Seal

• Prevents power steering fluid leaks from the steering gear assembly
• Reduces contamination ingress that can damage steering components
• Maintains hydraulic pressure for consistent steering response
• Protects against premature wear of the worm shaft and housing bore
• Helps avoid costly steering system repairs due to seal failure

Installation Notes and Tips

• Ensure the housing bore and shaft are clean and free of debris before installation
• Use appropriate tools to press the seal evenly into the housing bore without distortion
• Verify the seal orientation matches the original part to maintain proper sealing
• Check shaft surface for wear or damage that could compromise the seal
• Consult vehicle service manual for torque specifications and installation procedures

Quality Assurance and Warranty

National's steering gear worm shaft seal 471645 is manufactured to meet OEM specifications for fit and function. The use of nitrile material and Redicoat technology ensures durability and resistance to common automotive fluids and environmental factors. This is a zero duplication part, guaranteeing authenticity and compatibility. While specific warranty details are not provided, National products typically adhere to industry standards for quality and reliability.