Grease guns are an integral part of proper machine lubrication but are also capable of inflicting damage and injury if used incorrectly. If you don't know how to load a grease gun, it can become a safety risk to both the lubrication technician and the machine. Learn how to properly load a grease gun in this 2-minute, 1-second clip from Noria's new training video "How to Use a Grease Gun."