So I recently acquired an old Sheridan with the janky push button safety you have to hold while firing and it’s got a weird problem going on. So the rifle pumps and holds air all day and the trigger system works flawlessly; however, when I fire the gun the air escapes out of the breech/bolt area. It’s missing the little cam plate cover but I wasn’t sure if that was the only thing causing it. It seems like there’s more to it than that but so far I’ve only worked on old crosman and Benjamin pistols so this model is completely new to me. I attached a photo and video, it’s hard to tell what it’s doing in the video but ALL the air is escaping out of the breech. Any help would be greatly appreciated!
Sheridan Weird issue with old push button safety Sheridan blue streak, NEED HELP!
- Thread starter Hughjazz69
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Get the cam plate, the cover and the two screws. When adjusted correctly, you'll be good to go.
Maybe grab a new lug screw too.
Maybe grab a new lug screw too.
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Looking closely at the rear of breech section, it appears that it has seperated from the main tube?
Examine it closely for seperation of the solder joint, and get that cam plate installed!
Examine it closely for seperation of the solder joint, and get that cam plate installed!
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ok, didnt you see in the video whats happening?? Becasue the 2 screws are missing along with its cam plate the bolt is no longer locked closed.Upon discharge the bolt blew back open slightly. So just get the 2 screws and the 2 part cam plate (inner and outer). I would still check your bolt O-ring . If you see it has a flat appearance around the perimeter edge change it. You can change that without taking the bolt out.
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You need these parts.
And two screws.
The problem is finding them available.
I have an idea where there are some. If you like I'll PM you.
And two screws.
The problem is finding them available.
I have an idea where there are some. If you like I'll PM you.
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This is what the parts look like installed.
There's a cam under the plate that pushes the bolt forward when you lock the bolt handle into firing position.
There's a cam under the plate that pushes the bolt forward when you lock the bolt handle into firing position.
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Thanks everyone for the quick responses, I did see what was happening in the video but even holding that bolt closed with a lot of pressure didn’t stop the issue at all so I had a suspicion that something else was going on. I decided to stick a wooden rod down the barrel and sure enough the barre has pellets lodged in it causing the air to escape back out the breech area. I’ll remove the pellets tomorrow and let yall know if that solves everything.
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I did notice that but even after applying pressure to that bolt the air was still escaping out the breech. I decided to test some other things out and sure enough the barrel has pellets lodged in it forcing the air back out the breech.
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Found what I believe to be the issue, wrong size pellets are lodged in the barrel from the previous owner. But I’ll definitely look into this as well.
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That would be greatly appreciated. Turns out there are pellets lodged in the barrel forcing the air back out the breech but I definitely want to get these parts installed as well.
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Before trying to drive the pellets out of the bore, first remove the bolt and find out how long the jam is. If there's very many stacked in there, then simply pushing them out may not be an option, and definitely don't try to pound them through by force... It will make a difficult job even harder.
Get an 1/8 inch steel rod and, with a torch, heat several inches up to a cherry red. Then melt through the center of the pellet jam. You might have to keep reheating the rod till you finally make a hole all the way through. This will provide some relief when you drive it out. Next step is to spray some WD40 down the barrel on both sides of the pellet jam. A brass rod and mallet can then be used to tap the slug out, preferably the shortest route.
I've used this method on several guns.
Attached pics show the worst I've seen. This early Sheridan had over three inches of compressed pellets stuck in the barrel.
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Great advice I’ll give that a shot hopefully this evening if not then I’ll knock it out this weekend. It seems that there are maybe 2-3 pellets about 5 inches from the end of the barrel. Do you still think this is the route I should take?
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I would never use a steel rod in a brass/bronze barrel!! YEs take the bolt out. You will need a 1/8" hex nut drive to get the lug out watch if there is a tiny ball detent and the little spring that will jump out the side when you slowly slide the bolt out. Now from the breech out to the muzzle you can first try a 1/8" wooden dowel and tap it to dislodge the pellets.This should work IF the wood fails step up to maybe a brass rod or a teflon covered cleaning rod in 177 or 20 cal. Some taps should dislodge the lead pellets.
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That's not too many, so just tapping out with the brass rod should work. Make sure to still spray WD40 in there first.
If you're comment about not using a steel rod is referring to my post, please read again. It is a small diameter rod and only used to melt through a lengthy pellet jam, not used as a push stick.
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YEs , I was referring to your post. Even a smaller diameter steel rod wobbling thru that rifled barrel can damage the delicate rifling of a soft brass barrel. IF its just a few pellets like he said the 1/8" wood dowel should work. Your picture of all those pellets mashed together looks like a lead rod ! That truly is unbelievable.I would think the first pellet jam was from not enough gas or pumped air. But it should have got shot out on the second hit. And to keep firing away that many with nothing coming out sounds totally ridiculous. I once had a used Feinwerkbau 124. When I tried to shooti it at a target nothing came out. I stopped and looked into the barrel and sure enough a stuck pellet. It was easy to push out with the wood dowel. The problem was a crystalized piston seal that didnt work very well. anyway if it was my sheridan thats how I would approach it.
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The pellets are stuck in the barrel because it was shot without the bolt being closed due to the missing cam. "My opinion"
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Try to lightly tap them out. Mark your progress on the dowel as you go.
Did you find a source for the parts yet?
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