Free: Contests & Raffles.
What are you wanting to do to it? Spring piston right?Spring change and hone of spring/piston/cylinder seem to affect velocity (e.g., faster piston speeds = faster impulse of air behind the pellet). Seals are pretty straightforward. If it leaks air, you will be losing velocity. The seal that they seem to be talking about, at least on a brake barrel, is where the barrel breaks. On an underlever, I am not so sure. Perhaps they are discussing a seal at the end of the piston that helps seal piston to the cylinder.Trigger work, also straightforward, at least in a spring piston gun (essentially like a firearm in that you are merely affecting the pull). With the exception of honing the cylinder, I would expect that most of these things could be done with a modest compliment of tools, including a set of punches. You might need some sort of spring compressor for spring removal and replacement, IIRC from reading about spring gun maintenance. You might google some Airgun articles by BB Pelletier or Tom Gaylord (same guy). He is now writing for Pyramyd Air at the link below, but he had a pretty good blog before that, including many a restoration of spring guns. (I don't know if his old stuff was incorporated into the Pyramyd Air body of works.)http://airgun-academy.pyramydair.com/blog/First thing is probably to track down a parts diagram to understand how it all comes apart.
Quote from: Fl0und3rz on July 24, 2013, 09:14:51 PMWhat are you wanting to do to it? Spring piston right?Spring change and hone of spring/piston/cylinder seem to affect velocity (e.g., faster piston speeds = faster impulse of air behind the pellet). Seals are pretty straightforward. If it leaks air, you will be losing velocity. The seal that they seem to be talking about, at least on a brake barrel, is where the barrel breaks. On an underlever, I am not so sure. Perhaps they are discussing a seal at the end of the piston that helps seal piston to the cylinder.Trigger work, also straightforward, at least in a spring piston gun (essentially like a firearm in that you are merely affecting the pull). With the exception of honing the cylinder, I would expect that most of these things could be done with a modest compliment of tools, including a set of punches. You might need some sort of spring compressor for spring removal and replacement, IIRC from reading about spring gun maintenance. You might google some Airgun articles by BB Pelletier or Tom Gaylord (same guy). He is now writing for Pyramyd Air at the link below, but he had a pretty good blog before that, including many a restoration of spring guns. (I don't know if his old stuff was incorporated into the Pyramyd Air body of works.)http://airgun-academy.pyramydair.com/blog/First thing is probably to track down a parts diagram to understand how it all comes apart. Exactly the kinda of information I was looking for, the seals seem like something I can do with almost no knowledge, alot of people are just saying replace it with a 1/2 inch sink faucet seal, or something of that nature. Can be removed without taking the gun apart with a flathead, the seal is on the top, It opens up on the top of the gun kind of like a real gun to where a slide opens up to load a new round i.e a pellet, and when it closes, the tube is pushed inside the seal and fully enclosed. The springs I know nothing about, Im literally as gun noob as it can get. and yes, Id like to do something with a new spring, Alot of things online are saying that its rated out of the box to around 450-550 fps, after some basic TLC, upgraded spring, and some trigger maintenance it can reach up to almost 800fps, and be a very sturdy tank of a gun. This guns solid, like super solid. The only problem with parts is there was sooo many variations of this model/style of a gun that its hard to exactly pinpoint what model it is.
If you want to hone the cylinder i can give you some pointers n send you the tool to get er done.Ive tuned a few air rifles with great results.i would think a maccari spring n seal kit would be your best bet.charliadatuna makes a great drop in trigger that may work also.Let me know.i have no use for the thing anymore.you will most likely need to build a spring press also.lots of info on sites like GTA
I believe it is a brake hone.I have the course stones for it.you want the inner surface of you compression chamber to have some scuffing so as to hold a light layer of moly grease and give consistant and constant seal.It will require you removing the spring.Ive never dealt with this rifle so i couldnt tell you exactly how it comes out.on a break barrel you have a breach block and linkage.i would assume yours is pretty well the same.
Def do some research before breaking into it.that spring carries alot of energy.With a little work you can smoot those spring guns out n make em shooters.They are very straight forward.i built a few n held on to an old trusty beman 22.Sometimes those chinese rifles will take real well to a barrel and crown polish.I moved to pcp air rifles before i picked up archery.but always loved the simplicity of a spring gun.problem is if you want sub moa it is a lot harder to pull out of a spring gun than a pcp.but they get the job done n ive put many a squirrel in the freezer with my beman.If you decide you want to tear into that thing.ill send you what i have.just cover shipping.Till they let me hunt big game with an air rifle in this state i will be sticking to my archery gear so you are welcome to what i have