JSAR Rator issues any help would be great.

[nervoustrigger]

Abrasives for thee but not for me!

Oh okay, I see how it is

[chwillbill68]

I did what Scott said twice with no luck yet.  I will keep trying and see if I can get it to seal.

Is it a very slow leak? Take some fine grit sandpaper and lay it on a piece of glass and sand both sides of the seat disc till its got a smooth new surface and give that a go.

No its a pretty fast leak.  It doesn't take long to drain the tank.  I will take a real good look at the disc and see if I can see anything.  Its weird that it worked for a while the leaked and I did the dry fire like you said and it worked for a while then back to the leak.

[chwillbill68]

Maybe a little late but did you verify its the valve leaking? Balloon over barrel?
I have had mine apart and its super easy to work on to me. I had a leak between the O ring on the valve and tube that would empty the gun after a period of time. If you think its the valve to seat leaking burnishing as recommended above should work. I would inspect everything under a magnifying glass if you have one.

I didn't get to the balloon test. But it was blowing out the barrel.  Now while doing what Scott says to do it is blowing out the transfer port pretty fast. But when you push on the poppet it gets louder and more air blows out.

[chwillbill68]

Mine did the same today. I will take her apart after a little snooze. Old age ya know. LOL


 From what yo describe, I figured it was the valve poppet to seat area rather than the reg.hat they suggested works well.


I'm a little hard on mine. I put well over 500 31gr. slugs down range with it today. Man, I'm getting LOW on lead!
 Knife

Knife,  Let me know what you figure out, maybe it will be what I need to do.

[chwillbill68]

I did what Scott said twice with no luck yet.  I will keep trying and see if I can get it to seal.

Is it a very slow leak? Take some fine grit sandpaper and lay it on a piece of glass and sand both sides of the seat disc till its got a smooth new surface and give that a go.

  Travis what should I use to burnish the brass part of the valve?

[Jacob_M]

I’m going on 1500 shots so far, so far so good. Hoping this doesn’t happen to my raptor.

[Franklink]

Do the set screws op showed pics of need to be loosened before the reg is adjusted?

[Jacob_M]

No, those set screws do not need to be loosened to turn the adjustable collar.

Only reason to loosen is if your taking the reg apart.

[bear air]

Holy smoke Knife that is a lot of shootin! I'm jealous, lol.

[Franklink]

No, those set screws do not need to be loosened to turn the adjustable collar.

Only reason to loosen is if your taking the reg apart.

Thanks Jacob.

[KnifeMaker]

Holy smoke Knife that is a lot of shootin! I'm jealous, lol.

It wears me out, but is the only way I know to test different slugs. Shoot, test, shoot, test, But sure is a lot of fun compared to setting home. LOL


My little snooze ended up being an all niter. Time to tear her down and find the issue. Grrrrr!!!

[chwillbill68]

Under that seat ring there should be an o-ring.
make sure every things clean, Lube the o-ring, and replace the seat and poppet stem.  Install the thimble and circlip.

Now with a electric drill attach it to the protruding stem and with a fair amount of pulling pressure spin the stem both directions a couple times.
Assemble just the lower tube and check it. repeat if it does not seal.

Scott can you help me with this question pls? You see the plastic seat in my pic, that's the way that it came out of the valve. It has that small lip on it, but it doesn't go down into the oring.  I tried putting the packing on the seat then slowly pushing it into the valve. But with the packing on it is to tight to slide down together. So I put the packing down lubed well and then put the seat down and tried to get it to pop into the oring but it doesn't seem to want to which make the seat move around a bit, which could be my issue maybe. Wondering if maybe I should flip the seat over and try it.  or is there a trick to get the seat to lock into the oring.

Thanks Bill C!

[Motorhead]

Shop has a long tool that simply is a stepped shoulder the seat sits on, o-ring placed onto the seat around its shoulder & then slid down the body hole.
Yes the o-ring needs to sit on the seats shoulder and in your case perhaps placing a small chamfer on the inner edge of seat will help in getting the ring to go into the o-ring.

[PoolDoc]

Is it possible the O ring has swollen preventing you from inserting the seat/o ring combo into the valve? I would try replacing the O ring if you have one of the correct size on hand.Then try assembling it again.
Does anybody have a complete list of O ring sizes for the gun? A complete list of size and location would be great?

[chwillbill68]

Shop has a long tool that simply is a stepped shoulder the seat sits on, o-ring placed onto the seat around its shoulder & then slid down the body hole.
Yes the o-ring needs to sit on the seats shoulder and in your case perhaps placing a small chamfer on the inner edge of seat will help in getting the ring to go into the o-ring.

thanks Scott, I will try that.

[avator]

I would return it for repair.

[oldpro]

I would return it for repair.

Ditto

[chwillbill68]

Is it possible the O ring has swollen preventing you from inserting the seat/o ring combo into the valve? I would try replacing the O ring if you have one of the correct size on hand.Then try assembling it again.
Does anybody have a complete list of O ring sizes for the gun? A complete list of size and location would be great?

Maybe, I don’t have many o rings to look for a match.

I have reached out to Jacob on the three ways I know of.  Just need to wait for him at this point.  No idea when that will be with this corvid- 19 stuff going on.

[ranchibi]

Bill, you have some incredible PCP’s in your Avatar. If you are unable to get it up and shooting soon, I’d do as Travis and the other Bill recommenced and send it in for repair. I just got mine back for a retrofitted adjustable regulator as mine came with the non adjustable regulator, they will take care of you! You do have some other fine shooting machines to keep you occupied for the time being 🤓.

[avator]

JSAR is a contributing sponsor of this forum. I would try to reach them through the resources here. Post in the dealer's gate or whatever. I would think that our sponsors would want to show dedication to our members. Just as we have a responsibility as to who gets access to our members. This relationship should be a two way street.