Shaft Sealing ring, Becker, U Series, U4.400, U4.630, Part# 90659500000

This is a shaft sealing ring (Part # 90659500000). It is also known as the WN290.1-1 . This small ring fits around the rotating shaft where it enters the pump body. Its job is to keep oil inside the pump and keep air outside.

This seal works on many Becker U Series pumps. Here is the full list :

• U4.400 (Index A, D, E)

• U4.400F (Index D, E)

• U4.400FK (Index D, E)

• U4.400FK-25 (Index A, E)

• U4.400FK-51 (Index A, D, E)

• U4.400SA (Index A, D, E)

• U4.400SAK-25 (Index A, D, E)

• U4.400SAK-51 (Index A, D, E)

• U4.630 (Index C, D, E)

• U4.630F (Index D, E)

• U4.630FK (Index D, E)

• U4.630FK-25 (Index C, E)

• U4.630FK-51 (Index C, D, E)

• U4.630SA (Index C, D, E)

• U4.630SAK-25 (Index C, D, E)

• U4.630SAK-51 (Index C, D, E)