Tuning Dreamline trigger issue

Hi, I write this feeling a little stupid. I have had my dreamline close to a year, and it lost all its air overnight, after no problems. So I thought I would give it a clean and check the obvious, like fill valve, tank, and reg O rings. I was looking at the trigger, and it had what looked like very fine silvery filings in, and around the hammer. So I took hammer/trigger out. It appears to me that the rough spring ends have possibly cut all these filings, as where the spring sits in the hammer adjuster, (Dreampup) one side has had black finish worn off it. So I polished the spring ends, and thought I would give everything that touches a light clean and smooth off. I didn't touch the sears, other than clean them.

So I put it all back together, and the small sear that latches onto the ridge around the hammer just won't engage. It slides past, but won't "hook up", and so the gun won't cock. It is the right way around too.

So in polishing the hammer, have I taken a micro edge off the hammer engagement ridge part? I didn't do anything more than hold 600 grit wet and dry onto this ridge and twirl with my fingers. It still has a matt look, so I didn't make it glow shiny. Any ideas?

Picture shows the shiny flakes.

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Well I took the bull the horns and put the hammer in the lathe. I ever so slightly altered it to what I thought it should be, and it works again. I think i've even made it slightly crisper. 



What are anyones thoughts on the silver flakes in that image? The photos are the hammer adjuster where the spring sits. Worn on one side. I smoothed and lubed lightly with moly grease. 

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The silver filings are exactly as you suspect, a sharp edge on the hardened steel spring digging into the aluminum adjuster. You said you did a polish job to the end of the spring, that will probably take care of the filings. With the picture you put in, i can see the ring on the interior of the adjuster where the spring was having its Sunday picnic 😂

Also, you said you made a mod to the hammer to make it work again, do you mind showing a picture? I've always heard of it being an adjustment change, as mentioned, but if there is a mod that can be cut on the lathe, that sounds like a more appropriate fix. 

Best of luck with finding the leak! Keyman is right on track 👍



Buck
 
Thanks Keyman, yes I have a balloon over the barrel tonight, and will do the testing with spray too.

Buck, I have put a couple of photos up. Ones a bit out of focus, but I was mainly looking at the angles. The big one of the hammer is what I have done to it, except I had put just a little more angle on the main edge, as that image shows it almost under cut, but effectively I flattened the face that the sear latches onto. 

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I must admit, I was a little surprised at how rough the spring ends were. Anyone that has anything to do with airguns, springers especially, would know the damage a sharp, jagged, moving edge will do. which is why we don't fit metal files into the guns, or lubricate with swarf. 

This also shows how much movement there is when the hammer spring unleashes. The end must actually travel out of it's seat by 5 - 10 mm judging by where the scoring is, although probably more so at lower hammer tensions.
 
Soapy water in a spray bottle. Don't forget to check reg and barrel
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Well a bubble bath it was. I took the reg out, carefully took most of it apart, not touching the ball bearing adjuster and cleaned it. Quite a lot of thickish grease in there, certainly heavier than silicone grease. It's back together now, and no more bubbles, but I will check it again in the morning.