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Crosman 38T Went Pffft!

461 Views 12 Replies 7 Participants Last post by  GuitarmanNick
Pulled out the Crosman 38T in .22 caliber yesterday for some indoor target practice. Haven't had it out in a couple of months.
Inserted a CO2 cartridge and discovered that a seal was leaking badly.
The gun is about 50 years old and has never been repaired so, it is due for a new seal kit.
Found the kit on ebay and should have it in less than a week. The gun was given to me about a year ago by a close friend, and was like new in the box. We were both surprised that it was working when I shot it for the first time.
The kit was only around $30 shipped, so I will have only a small investment in it, if I can repair it.
As I looked into the repair procedure, it appears it will be quite a challenge to keep parts from flying across the room when disassembling it.
The 45 pages of instruction are also a little intimidating, but very detailed. It should go smoothly, and the plan is to follow the instructions all of the way.
I like to think that my mechanical skills are well developed and that nothing is too complex for me to handle. I have successfully rebuilt several air guns. Being a revolver, it is a little more involved than my past air gun projects.
The gun is one of my favorites and worth the effort and investment of a little time and money.
Admittedly, anything that can leak air or fluids, seems to be my nemesis. I have had to do a few jobs more than once before finally being successful, no matter how careful I am during the first attempt.
I will update this thread on the outcome, either way.
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You may want to send it to Tim McMurray of MACH One in CA. He can do amazing things with those guns. You chack into his "tune up" where he tunes the trigger and the action.
Sounds like it will be a cool, project and definatly worth the effort
If you decide to DIY, do the disassembly inside a gallon Ziploc bag or equivalent. You will be able to see what you are doing and everything will be contained inside the bag, even if some part does fly off. If you aren't using a Ziploc, you can make the bag more escape-proof by putting a clip for potato chip bags on the lip of the bag, between your hands when they are inserted into the bag (although it can be something of a circus trick to get the clip onto the bag!). You can achieve the same end by zipping the Ziploc between your hands, again something of a circus trick.
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You may want to send it to Tim McMurray of MACH One in CA. He can do amazing things with those guns. You chack into his "tune up" where he tunes the trigger and the action.
Tim won't rebuild a 38T (or 38C) unless it has one of early brass valve bodies. He won't do the ones with a zinc valve. He does however sell the rebuild kits.
Box and saran wrap will save parts from launching into the great unknown.

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Box and saran wrap will save parts from launching into the great unknown.
I like your idea even better than mine (which I obviously stole from many others)! Much more room to work and, with the rubber glove "sleeves" you attached to the holes, much easier to get and out while maintaining the ability to corral parts. I would suggest that it might be a good idea to tape the seams so there is no possibility of small parts slipping under an edge but that may simply be paranoia on my part.
Love the box!
Now I just have to order something from Amazon......
I like your idea even better than mine (which I obviously stole from many others)! Much more room to work and, with the rubber glove "sleeves" you attached to the holes, much easier to get and out while maintaining the ability to corral parts. I would suggest that it might be a good idea to tape the seams so there is no possibility of small parts slipping under an edge but that may simply be paranoia on my part.
MY box was a 5 finger discount also. 😇
Thanks for the suggestions, gents. I have used plastic bags many times in the past, but this toy is large enough that the box appears to be an excellent idea.
Update:
The seal kit arrived in the mail yesterday and this morning I resealed the gun successfully!

It was relatively easy to work on, and I am happy to report that no parts went flying or were left over after reassembly.

Loaded a cartridge and everything went as it should when pierced. Gun fires, cylinder rotates, and it is no longer leaking.

The most difficult part was getting the spring for the pellet loader back into place correctly.

Woohoo! Back in business.
Now we know who to send em to ;)
Tip to make installing the spring for the pellet loader very easy and reduce the chances of damaging the spring...
Looked for videos on this but found that they all cut the video to install this spring failing to show how they finally did it.

Put everything back together but do not install the pellet loader spring until after you have replaced the frame cover and tightened the screws.
Slide the pellet loader toward the muzzle and insert the loosely coiled end of the spring into the channel towards the rear of the gun. Use a small screwdriver to push from the tightly coiled end of the spring until it clears the pellet loader. Push down on the spring and it should pop into place, completely undamaged.

Also ran into a small issue with the hammer not being able to lock back with a cartridge installed. When the new seal was installed in the top of piercing block, the fitting for the line did not tighten down as much as it had been prior to the repair. The top of the fitting was holding the hammer up just enough to keep it from locking with a cartridge installed. I used a small piece of brass between the frame and the piercing block to achieve the needed clearance.

Now we know who to send em to ;)
Actually, being retired, I have lots of time and am always looking for small projects to keep me busy.

I have repaired guitars(both acoustic and electric), banjos, and mandolins including refinishing and final setup. Also used to do a lot of work on firearms for family and friends, but new state transfer laws stopped much of that. Still refinish stocks and work on a few C&R items from time to time.

One of my friends has quite the collection of fully automatic BB guns and brings them to me for repair. So far, I have only disappointed him on one occasion. It was an old Daisy rifle that needed seals and the barrel was badly bent. For just a little more the price of the seal kit, he bought a new version of the same rifle.

I'm open to new projects if anyone cares to message me. Located in Marylandistan.
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