Normally when replacing grease in a cartridge-type grease gun, it is not necessary to bleed the air out. However, if the grease does not flow through the nozzle evenly, the air must be bled from the grease gun. There is usually a valve on the top of the unit to get air out of a cartridge-type grease gun. This valve allows air to pass through without leaking grease. It might take several attempts to remove the majority of the air pockets within the cartridge and grease gun.
- Skill level:
- Moderately Easy
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Things you need
Pull the T-handle on the bottom end of the grease gun all the way out until it locks. Twist the top cap to ensure that it is tight. Pull the squeeze handle or lever away from the grease gun body. This prevents grease from entering the grease fitting nozzle while bleeding the air.
Turn the air bleed nozzle on the top of the cap two full turns with a wrench. Twist the T-handle and push it into the grease gun canister. Excess air bleeds through the air bleed nozzle.
Repeat pulling the T-handle and pushing it back in until you no longer hear air coming through the bleed valve. Tighten the air bleed valve with the wrench and pump the squeeze handle until grease begins to exit the grease fitting nozzle.
Tips and warnings
- If your cartridge-type grease gun does not have a bleed valve, loosen the cap one full turn. This is enough to allow air to pass through. Stop pumping the T-handle when you see grease start to bleed past the seam of the cap and body. Wipe the grease away with a rag and tighten the top of the grease gun.
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