Crosman remington airmaster 77 manual air

The edges of the holes that the roll pin goes through were kind of rough, and I thought they might harm the O-ring upon insertion of the valve assembly, so I applied a dowel wrapped in sandpaper to the edges of the holes inside the tube. If you are installing a new valve assembly, I guess that that doesn't matter. So I first dropped a couple nuts with 1/2' flats into the tube so that they were stacked and the valve stem passed through them and was protected by them. I had only a 3/8' dowel on hand to drive out the valve assembly, and I was afraid of bending the valve stem. I did some harm to the appearance of the tube that way. When driving out the roll pin, I set the pump tube on top of the jaws of a vise. I drilled into a block of wood and left the point of the bit in the block, then struck the block with a big hammer. To drive out the roll pin, I used the butt end of a 3/16' drill bit instead of a punch. I don't think that the stuck pellet could have caused the low-power condition. Nobody has ever used BBs in the gun, so nobody noticed. I found a deformed pellet stuck in the BB feed mechanism.

I took pictures as I went so I could retrace my steps. I expected to see springs flying when I opened the receiver, but none did. There is a video on ebay that explains how the valve works.Дisassembly was easy. You can use the much-better diagram for the 2100B to get a clear picture with part names so you can make sense of how things work. The online parts diagram for the 2100 is kind of crummy and doesn't include names of the parts. I'll see if I can add something to Nick's work to benefit any shiftless amateurs like me. Sometimes it doesn't get it out of the gun. I tested it and at 10 pumps I was getting 680 fps with Crosman Premier Lights (7.9gr.). I'd love the see how Crosman assembles the things. It take a couple of tries to get all the pins and such back in the holes. Then you sort of massage the whole thing back together. Notice the position of the cocking lever, and you have to have the BB follower pointing upwards to align with the slot it travels in. You need three hands and a helper monkey to get it all back together. I reinserted the valve and lined up the transfer port. See how the extension snaps into the piston where normally the seal snaps in. So I replaced them and screwed it back together. The inlet and exhaust valves were good but the o-rings needed to be replaced. It's basically a 760/1377 piston with an extension.

Crosman remington airmaster 77 manual air