Timken 8773S Power Steering Pump Shaft Seal

Power Steering Pump Shaft Seal for Ford and Lincoln

Timken 8773S is a power steering pump shaft seal built to retain steering fluid and block contaminants at the pump shaft. It is a direct-fit sealing component for a wide range of Ford, Lincoln, Mazda, Chrysler, Dodge, and Oldsmobile applications that use the listed pump types.

• Precision sealing design helps reduce lubricant escape
• Reinforced outer case helps resist installation damage
• Ribbed rubber inner diameter helps seal minor shaft imperfections
• Internal contamination exclusion system helps keep debris out of the seal area
• Vent holes promote lubricant flow around the seal lip to reduce heat buildup

Detailed Product Overview

Built for steering system service, Timken 8773S addresses shaft sealing at the power steering pump where fluid loss and contamination can lead to noise, poor assist, or pump wear. This seal is used across applications such as the Ford F-150, Ford F-250, Ford E-150 Econoline, Ford Crown Victoria, Lincoln Continental, and Lincoln Navigator, along with select Mazda, Chrysler, Dodge, and Oldsmobile models. The part number 8773S is also a useful reference when sourcing the correct power steering pump shaft seal for Ford pump, Eaton pump, and Federal pump applications.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Fix

• Power steering fluid leaking from the pump shaft area
• Contamination entering the pump seal surface
• Seal wear caused by shaft surface imperfections
• Heat-related seal deterioration in the pump housing
• Steering assist issues tied to low fluid level

Installation Notes

• Verify pump type and vehicle application before installation.
• Inspect the shaft surface for scoring, pitting, or burrs before fitting the seal.
• Clean the seal bore and surrounding components to remove old fluid and debris.
• Install carefully to avoid damaging the reinforced outer case or sealing lip.
• Confirm proper seating after assembly and refill the system with the correct fluid.

Quality Assurance

Timken designs its oil and grease seals with contamination control, durability features, and sealing geometry intended for demanding drivetrain and steering service. Part number 8773S reflects that engineering approach for power steering pump repair.