So I bought a small grease gun from the Polaris dealer a couple years ago. It takes the small Polaris grease cartridges. It used to work in the past. Now I am having problems with it. After loading a new cartridge I get nothing when I squeeze the trigger. If I connect it to the zerk, I also get nothing and no resistance like it used to give.

The rod I pull back and lock to insert a new cartridge and I do remove the cap and tin foil cover. Then I unlock the rod. It seems like the lube goes behind the rod top cause eventually the rod goes all the way into the gun. Then when I pull the rod out it squeezes out lube from the back end. I am so confused.

Is the rubber gasket bad that is at the end of the rod? Help, I just went through 3 tubes of grease and got no where!!!!!

What do others use? Different types of guns or????