How to Quickly Bleed Air from a Manual Grease Gun?
2 Answers
Unscrew the grease gun nozzle to separate it from the barrel. Lock the locking tab at the rear of the barrel and push the handle at the barrel end all the way in. Submerge the open end of the grease gun into the grease bucket to a depth of about 30 mm, then pull the handle at the barrel end to draw grease into the tube. Reattach the grease gun nozzle, hold the locking mechanism at the barrel end, and push the follower handle to begin bleeding air. Use your fingertip to control the air vent until grease emerges from the vent, indicating that the air has been fully bled.
As someone who frequently maintains equipment, the key to bleeding a manual grease gun is opening the bleed valve and operating the piston. First, hold the gun body vertically or at a slight angle to concentrate air bubbles at the top. Then, loosen the bleed screw or valve with a wrench and gently pump the piston a few times—the air will naturally escape. Once the grease flows evenly without bubbles, the job is done. If there's excessive air, repeat the process a few more times. Adding a small amount of thinner when the grease is too thick will improve smoothness. Routine maintenance should also include checking seal integrity to prevent air ingress, which complicates future use. Operate slowly throughout to avoid grease splatter, waste, and workspace contamination—ensuring efficiency, cost-effectiveness, and extended equipment lifespan.
