We went through 4 CO2 cartidges and now each time insert a new cartridge the CO2 leaks out while I am tightening the piecring tube cap. I also assumed paying $15 for a gas seal kit might be just as good as buying a new 1077 but saving $55, unless I have reason to believe something else has degraded with my 1077 that would make it not worth salvaging. However, the mere fact that CO2 is used as a propellant in these guns means that the seals are the their weak spot. Took out seal and it looked pliable and intact. 1008 Owner's Manual & EVP (1992-1997) 1008 Owner's Manual & EVP (1997-Present) Crosman 0413 Speedloader 12-Shot .177-Caliber Pellet Clips For Crosman 1077 Series And WildFire Air Rifles (3-Count) 4.6 out of 5 stars 957 $4.95 - $15.54 The Crosman 1077 semi-automatic air gun requires very little maintenance. NOTE That we cannot accept air rifles having any aftermarket regulator as we do not have the parts to repair the reg if it has a problem. We use factory-specified lubricants and some special Crosman designed fixtures (as used on the Crosman production line) to ensure high quality reassembly. Crosman - Pellet Guns, BB, Airsoft Rifles, and pistols and more on sale I have not used my 1077 in 2-3 years due to the seal problem. Crosman has been producing quality air rifles and air gun ammunition since 1923. I assumed that because the 1077 is still being sold new that there probably aren't newer and better designs around the same price. The Pellgun Oil spreads through the action as the 1077 is fired, due to the pressure of the CO2, and is absorbed by the O rings and seals in the gun. Maintenance. I bought a Crosman 1077 at the end of January 2010 and I am still making up my mind whether I like the gun. It had a noticeable depression matching the end of the powerlet, the other side was flat. Crosman 1077 CO2 air rifles are surely a lot of fun to shoot. Things I liked: Several Months ago, I first ordered the regular plastic version of this Crosman 1077 semi-auto CO2 air rifles, for a close friend and neighbor up the road from my place.. As with all air guns, problems can arise from … Crosman 1077 CO2 Air Rifle seal replacement, or what to do if your gun leaks gas. You can buy speed loader and additional pellet clip for faster reload. For even greater accuracy, you can buy a scope to mount in 11mm dovetail scope rail. 100 Owner's Manual (1942-1951) 101 Owner's Manual (1925-1951) 102 Owner's Manual (1926-1951) 104 Owner's Manual (1942-1950) 107 / 108 Owner's Manual (1949) 1077 Owner's Manual & EVP (1994-1998) See all 167 articles Crosman Air Pistols. The 1077 was used to trade for his Crosman Break Barrel .177 air rifle. When I put in a new powerlet it instantly spewed out all co2. I tried to revive my old seal, by soaking it in crosman pelgun oil for several hours. Posted: Sun Jul 30, 2006 3:23 pm . Crosman Corporation is an American designer, manufacturer and supplier of shooting sport products, with a long-standing presence in airgun design and a tradition of producing pellet and BB guns. Crosman 1077 Accessories. Post subject: Crosman 1077 Leaking CO2. Crosman products include classic air guns such as the Pumpmaster Model 760, break-barrel air rifles, biathlon trainers and air pistols. The Crosman 1077 has only CO2 cartridge as an only accessory. Gerald is old folks like me. You receive a 90-day warranty on the repair. This is the best insurance to keep your CO2-powered airgun – like the 1077 – leak free over an extended period. Crosman Air Rifles. Joined: Sun Jul 30, 2006 3:19 pm Posts: 4 I just bough a 1077 from a local shop for my son. Semi-Automatic air gun requires very little maintenance the same price very little maintenance for. The seal problem even greater accuracy, you can buy speed loader and additional pellet clip for faster reload factory-specified! 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