Grease gun air lock?
- Thread starter cmyoung2
- Start date
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John0829
Veteran Member
I have a 50 year old Lincoln pistol grip that my wife bought me not long after we married and have rarely had the air lock issue. I put the grease cartridge in, screw on the end, open the bleeder, slam home the plunger rod then close the bleeder and pump grease until the tube runs out, to quickly I might add. On the rare occasions it does get an "air lock" I can open the bleeder, bump the plunger rod and all is fine again. I thinki the "air lock" is from tubes that have an air bubble in the middle of the contents, it is the only way to explain how air gets in after a new tube has been installed and used for awhile.
Todd727
Gold Member
Never had this problem over the years. My guns have always been stored horizontally.
I had this air lock problem in my batt 20v Dewalt when replacing tube. I watched a video about placing new tube in gun, 1 open vent, 2 pull plunger and take MT tube out, 3 put new tube in and let plunger go in with vent screw still open, 4 pull plunger back out and turn 1/4 then push back in til grease comes out of vent, 5 pull plunger back out then let back in and close vent, 6 if that dont work run over with tractor..........
Industrial Toys
Super Star Member
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Had my share of trouble too. Lately trouble with grease somehow getting to other side of piston. So when you pull out charging handle to change tube, you have to force a pile of grease out back of gun.
But, I have not had air lock issues lately and this might suggest that my latest bunch of grease flows easeir creating my current issues. I always seem to end up with jars of wasted grease, that should have gone into some zerk! And having to change the tube that much sooner.
But, I have not had air lock issues lately and this might suggest that my latest bunch of grease flows easeir creating my current issues. I always seem to end up with jars of wasted grease, that should have gone into some zerk! And having to change the tube that much sooner.
it gets air locked because the rubber plunger head gets stuck in the tube. have had it happen to all my guns even the dewalt cordless gun, they sent me a new plunger. If the grease sits in there too long it seperates and hardens.
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I suppose thats possible but either way the below comment works for me......
I suppose thats possible but either way the below comment works for me......
PILOON
Super Star Member
I may be wrong but I seem to recall that many, if not all, have a button or valve to release or bleed the air pockets.
My battery powered one has that feature. (must check my 2 manual guns)
My battery powered one has that feature. (must check my 2 manual guns)