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Lubricate moving parts according to the manual
Monitor for leaks and unusual noise
Check Valve Ball Kit
Inspect diaphragms and replace if damaged
For 3/8 in Husky® 307 Pumps
GRACO 1/2- & 3/4-inch TPE (Hytrel) Check Ball Kit - (SKU: D05050) Lubricate moving parts according toThe GRACO D05050 is a check ball kit designed for use in GRACO diaphragm pumps. It contains check balls made from TPE (Hytrel), a durable and chemically resistant thermoplastic elastomer. This kit is intended to maintain or restore the sealing and check valve function within compatible GRACO pump assemblies, ensuring reliable fluid flow and preventing backflow. Key Features: Check Ball Kit 1 2 inch & 3 4 inch TPE (Hytrel) GRACO Husky 515 716 pumps
