Others Looking for help with 3622 leak

[Dogowski]

Breech oring is so tedious to change. Hopefully you've got an oring that will fit.

 

[PapaT]

Breech oring is so tedious to change. Hopefully you've got an oring that will fit.

Good point, I should find orings...

 

[Elexious Musick]

Hello folks,

I have a Crosman 3622 which has about 1,700 pellets through it and it has held up great so far. Recently I noticed that it was losing about 300 to 1000 psi after a couple of days in storage and I discovered that the front fill-port was not screwed in tight, so I thought "Alright, simple fix." I degassed the gun and unscrewed the fill-port end cap, cleaned the threads and did a quick swab down the cylinder to get rid of the moisture while I had it open. That is all I took apart. I put the fill-port end cap back on and cocked the bolt to alleviate the hammer pressure for the initial fill (something I've done before for first fills).

This is where it gets weird. I have no leak from the end cap, but I now have a very fast, audible leak at these two holes. The hole in the top of the red circle is where the front trigger unit screw threads in, and I'm not sure what the other hole is for, but it cants at an angle on the bolt side of the gun:

View attachment 17437

I am new to the 3622/2240 line of products, and I have not taken apart anything in the hammer spring or valve part of the gun. I had degassed the gun before when adding the steel breech, and I didn't have any leaks when I did that. Did I bump something while I was swabbing the air cylinder? I don't think I did.

I would love to hear from those with more experience working with this or similar platforms. Thanks!

The Crosman 3622 comes with a 5-year limited warranty against defects in materials and workmanship. Maybe have Crosman fix it for you?

 

[Farmplinker2]

This reminds me that I need to tear down my 3622 and find the reason for its leak. It's only puff of air when shooting. It holds air when not firing. My suspicion is breech o-ring, but need to go hunting and verify...

It may be like my one 362 that "leaks". The bolt is smooth enough that it's possible to accidentally lift it enough the bolt doesn't seal. Have to check every time I go to shoot.

 

[PapaT]

It may be like my one 362 that "leaks". The bolt is smooth enough that it's possible to accidentally lift it enough the bolt doesn't seal. Have to check every time I go to shoot.

Maybe, but it's louder and I get an eye puff with every shot.

 

[Elexious Musick]

Maybe, but it's louder and I get an eye puff with every shot.

Crosman's built-in glaucoma test!

 

[VMC]

I have four Crosman Disco tube gun builds that I hand pump. I add a drop or two of silicone shock oil inside the fill nipple every third or fourth time I pump them up. The oldest is about ten years old with no leaks or corrosion at the valve O rings. I have disassembled it twice over the years just to replace the O rings in case of wear, but no corrosion showed up. I believe that is the best way to prevent any moisture damage.

 

[Roamin Greco 1]

VMC beat me to it.

Silicone oil in the fill port will get blown all around the air reservoir and seals.

But silicone oil doesn't have enough viscosity for metal to metal lubrication. That's why your other parts were binding.

Only be careful that lubricating oil doesn't migrate where your seals are. Most lubricating oils will degrade rubber seals sooner or later.

I defer to Ben. He designed these guns.