If you can rock or move the piston, the hub is properly filled. When adding grease, always use a hand grease gun. An automatic grease gun will destroy the hub's inner seal. Bearing Buddy Model 1980A has a blue ring, which acts as a visual lubricant level indicator inside the hub. If the blue ring is flush with the snap ring, the hub needs grease.
T is the threaded unit.
It is available in chrome-plated or stainless steel. When installing the Model 1980T, apply Permatex or some other greaseproof gasket cement to the Bearing Buddy threads, and then screw Bearing Buddy into the hub, hand tight. Most marine dealers and some automotive parts stores sell Bearing Buddy . Check the Yellow Pages for a dealer near you, and call first to confirm that the dealer sells genuine Bearing Buddy and not a copy. If you are unable to locate a dealer, contact us with your location and we will help you locate the nearest dealer.