Tuning Akela slow air leak found/ Now small bb fell out and looking how to fix

I've had this PCP rifle for about 2 months now, and it has always had a slow leak that I wasn't able to pinpoint until now. I finally took the stock off and soap tested multiple areas. There is an obvious leak coming out of a brass fitting above the pressure gauge on the air tube(?). It looks like I will have to take the whole gun apart to get to it. My question is, what do you think will need to be replaced? Looking at an old parts diagram, I can't tell what's what. I'm assuming a possible oring. If so, does anyone no what size or part #?

Thanks 
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I am almost 100% certain that the only brass fitting on these guns is the burst disk on the air tube. It will take a quick bump of a 3mm allen key to tighten the cup screw that sits over the burst disk. I had a similar leak on my origianl Kral after sitting in my unheated garage and going through 2 years of heat/cold cycle. The dissimilar metals worked themselves loose, imho.

Simple fix and you will be happy again :D
 
I am almost 100% certain that the only brass fitting on these guns is the burst disk on the air tube. It will take a quick bump of a 3mm allen key to tighten the cup screw that sits over the burst disk. I had a similar leak on my origianl Kral after sitting in my unheated garage and going through 2 years of heat/cold cycle. The dissimilar metals worked themselves loose, imho.

Simple fix and you will be happy again :D

That certainly was the issue, and fixed with a little more torque on the fitting. Kind of a bummer this happened right out of the box, but glad it was an easy DIY fix. It's nice to know that the gun won't be 1/2 drained every time I go to use it now.

Thanks again for everyone's help and suggestions.
 
Air pressure has held for a few days now. I finally got a chance to zero my scope in, but something bizarre happened. While changing magazines on the shooting bench, something fell out of the gun. This very tiny "steel" ball. I thought for sure it must have came out of the rotary mag, but I can't see anywhere where it would go. I thought maybe it was supposed to go in that little circular groove by the numbers, but I don't see a little ball in my other mags. Any ideas what this little ball is from?

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I believe that I have found where it is supposed to go. With the bolt cocked back, I can see a spring (thought it was an allen stop bolt at first) where I assume the rotary magazine is supposed to lock in, see pic. I guess it is related to the magazine hold. I can't figure out how this little bb is supposed to sit, or if there's something else missing. Any ideas? Or better yet anyone have picture of how this part is supposed to look? I'd rather not call and have send back the gun to Crossman if it's something simple that I can fix.



Well pic uploads seems to be broke at the moment... I'll try again later. Here's a shared link to the photo for now. https://photos.app.goo.gl/cHX5FAvdRWnYcUyQ7