Bobby199 Posted June 8, 2015 Report Share Posted June 8, 2015 Hi there chaps, so am looking at helping a friend do up an air rifle. I have not seen it in person yet. And we know it won't be the best gun In the world... It has sentimental value and is more of a for fun, because we can. So it is a Gamo .177 of some kind. I have got a scope for it, and stock refinishing is no problem. But it seems a tad low on power apparently (could this be perished seals, do they just require some silicone grease? (Or where can I get some suitable new seals) Also apparently it sounded rather loud? Just put a dab of grease in with the spring, or something more complex? Many Thanks for any help you can give. Quote Link to comment Share on other sites More sharing options...
hyflier Posted June 8, 2015 Report Share Posted June 8, 2015 Hi Bobby this is a Gamo Expo, if its anything like the Magnum inside, the piston washer will have gone rock hard and I have no doubt the breech seal has perished so there is lots of compressed air escaping between the cylinder and barrel, resulting in loss of power. Parts are available take a look here: https://www.gunspares.co.uk/products/24422/Expo/ They're not difficult to take apart, just be careful of the mainspring and particularly if you're changing it for a new one. I don't know where you are in the UK but if I can help and you're close enough, let me know. Quote Link to comment Share on other sites More sharing options...
FalconFN Posted June 8, 2015 Report Share Posted June 8, 2015 Im no Sherlock Holmes but as it says Expo on the side I'd guess its a Gamo Expo. It could probably do with a good strip, clean and grease but if you check out the Chambers Gun Spares website they often have exploded views. I assume it will have a leather piston seal which can last for years with the right care so you may not need to buy any spares at all. By the way, I think the scope is back to front. Quote Link to comment Share on other sites More sharing options...
Bobby199 Posted June 8, 2015 Author Report Share Posted June 8, 2015 (edited) Thank you chaps. Just what I needed! I'll get back to you how I get on Also hyflier, what do you mean by be careful of the mainspring especially if replacing? Many Thanks, James Edited June 8, 2015 by Bobby199 Quote Link to comment Share on other sites More sharing options...
hyflier Posted June 9, 2015 Report Share Posted June 9, 2015 The mainspring is under tension and although the old one may be a bit compressed and not quite so "springy" it will no doubt want to come out of there considerably faster than it went in. A new one will have even more tension, If you don't have spring compressor, just make sure you're not in the way if it does fly out, that was all Quote Link to comment Share on other sites More sharing options...
snarepeg Posted June 9, 2015 Report Share Posted June 9, 2015 Im no Sherlock Holmes but as it says Expo on the side I'd guess its a Gamo Expo. It could probably do with a good strip, clean and grease but if you check out the Chambers Gun Spares website they often have exploded views. I assume it will have a leather piston seal which can last for years with the right care so you may not need to buy any spares at all. By the way, I think the scope is back to front. No think about it. Quote Link to comment Share on other sites More sharing options...
Bobby199 Posted June 9, 2015 Author Report Share Posted June 9, 2015 Thank you all, I'll let you know the results in a fortnight. But I cannot find anywhere that sells seals for this gun... (Other than mainspring seal) Could I use a simalar seal from a diffrent gun? If so any suggestions? Quote Link to comment Share on other sites More sharing options...
hyflier Posted June 9, 2015 Report Share Posted June 9, 2015 Part Number BS002 £3.31 on the link I posted earlier Quote Link to comment Share on other sites More sharing options...
Bobby199 Posted June 9, 2015 Author Report Share Posted June 9, 2015 Aaa, sorry I saw B1002 and got mixed up thinking I was looking at the wrong part. Thank you Quote Link to comment Share on other sites More sharing options...
Livefast123 Posted June 9, 2015 Report Share Posted June 9, 2015 (edited) I may have a stock in v.good condition up in the attic from the ASI Cadet equivalent......... Any good? Edited June 9, 2015 by Livefast123 Quote Link to comment Share on other sites More sharing options...
Zapp Posted June 9, 2015 Report Share Posted June 9, 2015 These were I think also sold as the ASI Sniper - my first ever gun. Quote Link to comment Share on other sites More sharing options...
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