Question 73General Subjects - Assistant Engineer

The correct answer is B) run the machine with the bearing housing drain plug open for a short while. The reasoning is that after adding grease to a ball bearing with a hand-held grease gun, you should open the bearing housing drain plug to allow any excess grease or air pockets to escape. This prevents excessive pressure buildup within the bearing housing, which could damage the bearing. The other options are incorrect because: A) adding extra grease to compensate for air pockets is not recommended, as it can lead to excessive grease buildup; C) saving used grease for analysis is not a standard practice in this situation; and D) leaving the grease fitting open could allow contaminants to enter the bearing.