I've had that same problem, but many years ago. I saw your post a couple
days ago, and been thinking, try and remember what I did to restart the
grease. Probably the same things you did. I think the suggestion to
remove the tip and pump some more makes sense. The problem sounds like
you've got air in the pump, instead of grease. I also put a ring on the
T handle end of my grease gun, so I can hang it, end up, and the grease
should settle into the pump by gravity. Slowly, glacial slow.
Did you ever get the grease gun restarted? BTW, if the magazine capacity
is over 7 ounces, might not be legal in your state of residence. If you
get caught at a traffic stop or something, you could go to Mechanics
Prison. Is it semi automatic, or fully automatic action?
Christopher A. Young
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My (hand operated) grease gun was working fine until it ran out of
grease. I put in a new grease cartridge and now it refuses to work. I
pumped it darn near 100 times, pumped that spring loaded shaft that goes
into the cylinder (where the grease goes), and banged the top of it
against a board to work the grease to the top. I did get out the last
tiny amount that was in the tip, and I can hear it pump out air, but no
grease. Is the gun dead, or is there some trick to it?