Before greasing a bearing with a grease gun remove the _______.

Before greasing a bearing with a grease gun remove the _______.

• A. vent
• B. drain plug
• C. relief plug
• D. seal

Answer: (C)

When lubricating a bearing with a grease gun, you need a way for air inside the bearing cavity to escape so the grease can fill the space smoothly. Removing the relief plug provides a vent path for that air and allows old grease to be pushed out as new grease is injected. Without removing it, trapped air can block proper grease flow and create air pockets or excessive pressure that could stress seals or prevent full lubrication. After applying grease, reinstall the plug and wipe away any excess. The other options aren’t the intended vent path for this lubrication step, and a seal or drain plug isn’t meant to be removed just for greasing.

When lubricating a bearing with a grease gun, you need a way for air inside the bearing cavity to escape so the grease can fill the space smoothly. Removing the relief plug provides a vent path for that air and allows old grease to be pushed out as new grease is injected. Without removing it, trapped air can block proper grease flow and create air pockets or excessive pressure that could stress seals or prevent full lubrication. After applying grease, reinstall the plug and wipe away any excess. The other options aren’t the intended vent path for this lubrication step, and a seal or drain plug isn’t meant to be removed just for greasing.