utectok Posted May 14, 2011 Author Report Share Posted May 14, 2011 really not sure age of gun its certainly not that new Quote Link to comment Share on other sites More sharing options...
MK38 Posted May 14, 2011 Report Share Posted May 14, 2011 After looking at the two different exploded diagrams i found on google ( i don't own the make of gun)and comparing them to your pics..... i think the ring looks like it should be fitted on the piston... the parts diagrams don't show a seperate ring other than the O ring. I've looked at youtube vids, and they just mention cleaning the cylinder and checking gas holes... no mention of seperate ring . Someone who owns one must know if that's the case... but to me it looks like it's come off the piston assembly, where it should sit and be free to rotate. Wish i could help more.......... Dave Quote Link to comment Share on other sites More sharing options...
utectok Posted May 14, 2011 Author Report Share Posted May 14, 2011 Cheers guys I know I cant find the part either but for what its worth it seems to be a loose fit on the piston and a push fit in the chamber as it were. Quote Link to comment Share on other sites More sharing options...
poorpeet Posted May 14, 2011 Report Share Posted May 14, 2011 That looks nothing like the internals from my Hatsan :blink: . The gas piston on mine(3yrs old ish)is longer and has a coil spring near the base. the gas cylinder under the barrel has no ridge or rings on the inside. Could this be a very early one? Wonder if, because of the problems, they quietly changed the design. Could explain the awful reputation they have which does not seem to be born out in my experience. Quote Link to comment Share on other sites More sharing options...
poorpeet Posted May 14, 2011 Report Share Posted May 14, 2011 Pics of the same parts from mine. Quote Link to comment Share on other sites More sharing options...
poorpeet Posted May 14, 2011 Report Share Posted May 14, 2011 And Quote Link to comment Share on other sites More sharing options...
utectok Posted May 14, 2011 Author Report Share Posted May 14, 2011 hey poorpeet that is really interesting maybe I just need to get a new piston? or maybe its a 20 bore thing? I reckon that a new piston might fit the existing chamber without the ring? Dunno but that was perhaps why nobody Knew what I was talking about? Quote Link to comment Share on other sites More sharing options...
poorpeet Posted May 14, 2011 Report Share Posted May 14, 2011 It looks like a different design altogether. I'd email Edgar brothers and ask them or take it to a gunshop that sell them and ask their opinion. Quote Link to comment Share on other sites More sharing options...
sitsinhedges Posted May 14, 2011 Report Share Posted May 14, 2011 From memory those thick rubber grommets shouldn't be on there at all, just one thin rubber o ring and the piston ring should have a thin wire securing clip. That's how my 20 was anyway, from memory. Quote Link to comment Share on other sites More sharing options...
utectok Posted May 14, 2011 Author Report Share Posted May 14, 2011 Yeah here is mine without the ring in place.... looks the same as yours poorpeet? Quote Link to comment Share on other sites More sharing options...
utectok Posted May 14, 2011 Author Report Share Posted May 14, 2011 maybe there is a part missing ie a securing clip in front of the piston ring?? Quote Link to comment Share on other sites More sharing options...
utectok Posted May 14, 2011 Author Report Share Posted May 14, 2011 (edited) you will notice there is a wee grove in my pic. On the piston that is. Perhaps someone with a working 20 could upload pa pic please? Edited May 14, 2011 by utectok Quote Link to comment Share on other sites More sharing options...
poorpeet Posted May 14, 2011 Report Share Posted May 14, 2011 The 3 rings on the picture of the piston on mine are 3 of the spings coils not big rubber O rings. I've looked through the manual for mine and it does not mention the 20 bore so perhaps that has different internals. Quote Link to comment Share on other sites More sharing options...
Blunderbust Posted May 14, 2011 Report Share Posted May 14, 2011 (edited) Looking at the pics of your hatsan it looks like the ring that keeps dislodging has either stretched or buckled so that it has dislodged from the recess on the spring collar. The small rubber ring should be placed on the top of the ammo tube after the spring collar and before the barrel gas port ring is placed over the tube. Try assembling it as I have stated but first force the collar into place in the recess (it should not be loose) and see how you get on. Ensure that the rubber ring goes on the ammo tube after the spring collar though or it wont work. Let me know how you get on. Slangevar, Jimmy Edited May 14, 2011 by Blunderbust Quote Link to comment Share on other sites More sharing options...
utectok Posted May 14, 2011 Author Report Share Posted May 14, 2011 Hi Blunderbuss thanks for your help I have assembled the gun several times and no joy :look: The diameter on the piston (is this what you call the spring collar?) is 25.5mm and the diameter on the internal face of the ring is 25.92. So its pretty loose on the piston, its external diameter is 30.53mm and the gas port on the barrel is 30.59mm so it will push fit into that but it will not stay in place. does this make any sense? Im wondering if the grove at the end of the piston is for a retaining clip to hold the ring on the piston? Quote Link to comment Share on other sites More sharing options...
sitsinhedges Posted May 14, 2011 Report Share Posted May 14, 2011 Where did you buy this gun from You seem to have bought a pig in a poke unless it wasn't like this when you bought it. Quote Link to comment Share on other sites More sharing options...
utectok Posted May 14, 2011 Author Report Share Posted May 14, 2011 yeah private via the dreaded guntrader.... he said it was working fine Pahh never consistently worked for me! Quote Link to comment Share on other sites More sharing options...
utectok Posted May 14, 2011 Author Report Share Posted May 14, 2011 here is a bad sketch of a section Quote Link to comment Share on other sites More sharing options...
sitsinhedges Posted May 14, 2011 Report Share Posted May 14, 2011 'For?' is where a spring retaining clip goes to hold the piston ring on. It's only a piece of sprung wire, IIRC. The three fat o rings shouldn't be there at all. Quote Link to comment Share on other sites More sharing options...
utectok Posted May 14, 2011 Author Report Share Posted May 14, 2011 Maybe the spring retaining clip is missing it's never been there!! Quote Link to comment Share on other sites More sharing options...
colin lad Posted May 14, 2011 Report Share Posted May 14, 2011 Sorry the photos are rubbish quality but you get the idea pm me mate with your phone number i will give you a bell as i have mine apart at the moment colin Quote Link to comment Share on other sites More sharing options...
colin lad Posted May 14, 2011 Report Share Posted May 14, 2011 mate i can see what is wrong will be easy to explain over phone i have pm you my number give me a bell colin Quote Link to comment Share on other sites More sharing options...
sitsinhedges Posted May 14, 2011 Report Share Posted May 14, 2011 Problem with Hatsans is that they've changed the internals a few times and as the newer models come along they stop producing spares for the older versions which means you're stuffed if it breaks down. I bought a new magazine tube and it was 1mm fatter than the old one I owned. I recut and threaded it to fit the reciever but then the gas piston wouldn't fit over it either so I was stumped Quote Link to comment Share on other sites More sharing options...
fruitloop Posted May 14, 2011 Report Share Posted May 14, 2011 just striped my 20 and the o ring gos on the mag tube then the piston but looks like a steel ring is missing out of the grove that holds the coler on if that helps Quote Link to comment Share on other sites More sharing options...
utectok Posted May 14, 2011 Author Report Share Posted May 14, 2011 Thanks everyone for all your help my wee girl is delighted and amazed how you have sorted it. It seems I bought it with the circlip missing I'll nip down the garage on monday and see if I can find a replacement! :good: Watch this space as they say Thanks so much as on friday I was ready to buy a new barrel!!!! saved me a fortune!! :good: :good: :good: :good: :good: :good: Quote Link to comment Share on other sites More sharing options...
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