SKF 6630 Power Steering Pump Shaft Seal

SKF 6630 Power Steering Pump Shaft Seal

SKF 6630 is a power steering pump shaft seal built for steering systems that need reliable fluid retention and contamination control. With a nitrile sealing surface and precise dimensions, it is suited for service work on select Nissan applications, including D21, Pathfinder, 720, Maxima, 200SX, 510, and 280ZX models.

• Part number: 6630
• Power steering pump shaft seal for steering system repair
• Nitrile sealing surface type for fluid sealing performance
• Outside diameter: 1.265 in.
• Shaft diameter: 0.669 in.
• Width: 0.276 in.
• Cross-reference part numbers include 48029W0501 and 14586630

Application Details

SKF designs seals with application-specific materials and dimensions to help maintain proper sealing at the shaft interface. This SKF 6630 seal is intended for power steering pump service where the original seal has worn, hardened, or begun leaking. It is listed for 1979-1990 Nissan vehicles, including Fits 1986-1990 Nissan D21, N/A, Std.; Fits 1987-1990 Nissan Pathfinder, N/A, Std.; Fits 1980-1986 Nissan 720, N/A, Std.; Fits 1981-1984 Nissan Maxima, N/A; Fits 1980-1983 Nissan 200SX, N/A, Std.; Fits 1980-1981 Nissan 510, N/A, Std.; Fits 1979 Nissan 280ZX, N/A; and Fits 1979 Nissan 510, N/A, Std.; From 6/79. The part number 6630 is also referenced for related service applications where the same seal dimensions are specified.

Common Repair Uses

• Stops power steering fluid seepage at the pump shaft
• Addresses steering pump leaks caused by worn sealing lips
• Helps restore proper fluid containment in aging steering systems
• Supports repair of contamination entry at the pump shaft area
• Replaces a damaged or hardened original shaft seal

Installation Notes

Confirm shaft diameter, outside diameter, and seal width before installation to match the pump specification. Inspect the pump shaft and sealing bore for scoring, corrosion, or wear that could affect seal life. Clean all sealing surfaces thoroughly and install the seal squarely to avoid distortion. Verify the steering system is filled with the correct fluid and check for leaks after service.

Quality Assurance

SKF has a long history in seal engineering and manufactures seals to defined specifications using premium materials for the intended operating environment. The 6630 is produced to support long service life and dependable sealing performance in steering pump applications.