The seal adapter sleeve (Part# 12927) is a key part of the drive shaft seal assembly. It works with the mechanical seal to keep oil inside the pump and prevent leaks. If you are rebuilding your KMBD pump or replacing a worn shaft seal, you may need this sleeve. It fits multiple KMBD models including 540, 720, 850, 1600, 2000, and 2700. A quality replacement part for your Kinney mechanical booster.
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