The spring could shoot out while attempting this. Note: Crosman has sometimes placed a washer behind the spring and often leaves the o-ring off the detent plunger. The 1077 was used to trade for his Crosman Break Barrel .177 air rifle. Then pull the Barrel shroud away from the barrel (#1077-006) and the rest of the receiver. 2. To do this take the valve and hold it by the ends between your thumb and index finger, and with your thumb and index finger of the opposing hand hold the ends of the bushing retainer (#1077A038) that seals the brass feed pipe to the valve (don't forget to hold the valve over a tray whilst doing this as the bushing, o-ring and a washer may fall out. Because airguns operate with a blast of air, most small particles of residue are blown out of the barrel as the airgun is fired. Start by turning the housing (#1077-021/#1077-022) over to it's left hand side where there is only one Screw hole near the barrel shroud receiver. When taking the Snap ring/Circlip out be prepared for a sudden release from the (up to now) loaded valve spring (#106-008) that is located inside the valve body (Don't worry it's not too strong, just firm). If you are like me, you may actually enjoy the extra time spent maintaining such a loyal friend. 2. heavyhanded. A drop of the oil on pivot points and O-ring seals will keep things working smoothly. The first step in caring for your airgun is to read and follow the directions given in the ownerâs manual. Next, use your Flat-headed screwdriver to remove the two frame screws (#2-041) on the left hand side and carefully ease the magazine halves (#1077-004, #1077-005) apart. Just push a dry patch through the bore a couple of times to remove any small particles of lead or other material. Now that you have the exterior valve parts removed, you can start disassembling the inners of the valve (#1077A015). Place the screws in a safe place where they won't get lost. I have a beautiful air rifle that looked almost new when I bought it. Do not force any button or lever that doesnât move as it should. If I have heard one âsecretâ about how to care for an airgun, I have heard a dozen. We do not display every part online. Many airgun parts are made of some sort of durable composite material that is virtually impervious to moisture. Now that you have the housing (#1077-021/#1077-022) open it is a good idea to get the barrel shroud (#1077-010) out of the way. The Crosman 760 is one of the industryâs great air-rifle success stories. Step 8: Removing the Hammer, Hammer Spring and Hammer Pivot Pin You will not need to remove the rings. b) Make sure you have all the Required Tools listed above or equivalents before you start. Note: The 1077, 1077W and 1077AS all disassemble exactly the same way. Model Number 1077 Name / Description RepeatAIR. It also has enough built-in accuracy for dad to use to discourage amorous night critters. Introduction:This guide is designed to help the beginner and intermediate airgun enthusiast to be able to completely disassemble the Crosman 1077 and gain a greater understanding its mechanical workings and components. The clear plastic bag will stop any potential flying springs from getting lost. We offer more small airgun parts than can possibly be listed here. How disappointing it would be to think that you bought and are changing the valve when you actually have the plug assembly! I use no solvents on airgun bores because of the danger of the solvent getting into the valves. Click on the diagram to expand and be able to view the part numbers. Also, use a steady, even pumping motion rather than spasmodic jerks. Now that all the screws have been taken out of the housing (#1077-021/#1077-022) slide everything into a clear plastic bag. Treat you airgun as the precision instrument that it is. 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