Campbell Hausfeld TL053700AV Air Powered Grease Gun

When I received the grease gun I put it all together. Everything fit together well. I popped in a tube of grease and connected the air to it. Squeezed the trigger and grease pumped right on through. This was going to work great! ....Until I actually went to use it. I could not get the fitting at the end of the hose to go on the grease zert. I tried to remove the fitting from the end of the hose but found it was impossible. Factory installed made it as tight as possible. After working at it a while, I managed to get the fitting on a grease zert. But when I went to remove it, I found that to be almost impossible. I used it on half a dozen grease zerts hoping it would get easier but it didn't. I had to give up when the last zert I put it on had the head break off when I tried to remove the hose. This is now a useless piece of equipment!