Grease can be added to the hub through an easily accessible grease fitting located in the center of the piston. Lubricant level (and pressure) can be checked quickly by pressing on the edge of the moveable piston. If you can rock or move the piston, the hub is properly filled.Click to see full answer. Accordingly, how do you fill bearing buddy grease?Using a Bearing Buddy to grease a hub can easily allow you to over fill the hub and blow out a seal. The zerk fitting where you insert the grease is sitting on a spring loaded disc or piston that will move outward away from the hub as grease is added. Push on the edge of the piston with your finger.One may also ask, does bearing buddy grease inner bearing? Expert Reply: Bearing Buddy pumps grease into the center of the hub all the way back to the grease seal. A double lip seal should be used to prevent grease from blowing out the seal when added. It would then fill the cavity inside the hub and continue to the inner bearing. Also to know is, how do I know if my bearing Buddy has enough grease? You can manually check the Bearing Buddy to be sure it has enough grease. All you need to do is press the edge of the piston. If you can move or rock the piston it has enough grease.Do I need to repack bearings with bearing buddies?When you use the Bearing Buddy Bearing Protectors like # BB2441, so you do not need to take apart the wheel hub and repack the bearings. The Bearing Buddy Protectors have a spring loaded seal that keeps the moisture and debris out of the bearings.