Insert the grease cartridge TIP: Always make sure that you’re storing your grease cartridge cap size down so that gravity does not create air bubbles Screw the head assembly back on the cylinder TIP: when it;s tight,then go back about half a urn so you can let the air out Release the plunger by pushing the tab, which is going to push the grease in Now,it’s ready to lubricate Note: If you have a difficult time pumping the grease the first time you use it, you might have an air pocket. To remove air pockets, slightly loosen the top of the canister by a few twists and try pumping until the grease starts flowing. Then tighten. If there is grease left in your grease gun, there is no special storage method needed. You can leave the grease gun loaded with grease as is and it will be ready for use. Keeping grease in the grease gun will not damage the product in any way. To operate the plunger and T handle simply pull it back and it will automatically lock. Load your grease and then push on the tab to unlock and push the plunger into the grease. Sometimes twisting the t handle will also release the plunger. Important! When you want to remove the nozzle from zerk fitting, it will be so hard to remove it. Please follow below steps, then you can remove the nozzle easily--- 1. Untighten the hose or nozzle a little bit(this step unload the kept pressure in the hose/nozzle) 2. Remove the nozzle from the zerk fitting easily. The issue is a nature of the regular grease gun and regular nozzle, it is caused by the kept pressure in the hose/nozzle which will make the coupler clamp the zerk fitting tightly still, as long as there is no kept pressure in the hose/coupler, it will be easy for the user to remove the hose/nozzle from zerk fitting.