I've got several of those guns. You generally have two options. I've rebuiltabout twenty of the model 110, 120 rifles and 106 pistols.1) Stick something in the exhaust body alignment hole and after pumping thegun two or three times, pull the "pin." All the internals come shooting out theback. Since you can't build any pressure, you're stuck with #2.2) Remove the front end of the gun. Front sight pin, front sight assemblyand pull the whole pump assembly out of the gun. Using a 1/8" piece ofdrill rod, line up the drill rod with the very center of the check valve andlightly tap. The whole internals will pop out the other end of the gun.Your drill rod will need to be about 2-3 feet long.I've got the Crosman service manual. If you need, I'll send you the relevantpdfs.