1322 hing pin slop.

[Mike71]

I know I have a FT piston so it puts more stress on everything, but my 1322 pistol is only like a month old and I've noticed the thing pin moves when the pump are is extended and doesn't have any pressure on it, move it forward and back a little and see the pin screw head move, any tricks to fix this short of silver soldering a washer on the outside and get a longer pin or something other than a new tube.
Could a new tube be heat treated to be tougher  ?

[Mike71]

When I say heat treat I mean just the front at the pin holes.

.191 front to back and .187 up and down is the measurements I got.
Definitely starting to egg out, I've ordered some 7/32 steel rod (.218 dia) to make hammer pins with, may try and make a solid over sized hing pin.

[Rick67]

Check out Wyoman’s links and see how he reinforces the tube to the barrel band.

He uses metal barrel bands though:



https://www.gatewaytoairguns.org/GTA/index.php?topic=148375.0

[Rick67]

You can even pin your valves.

I’ve done it years ago after seeing his.

[Mike71]

I've got some set screws on the way to pin the valves, I'll check out the link on reinforcing the tube.
Thanks.

[Rick67]

I've got some set screws on the way to pin the valves, I'll check out the link on reinforcing the tube.
Thanks.

I did mine top and bottom, so they’re hidden by the breech and/or trigger frame.

[Hoosier Daddy]

Would this help?
 I have the older hex head on mine and it is well made.
But if your hole is wollowed out it may not fix your issue.

https://www.alchemyairwerks.com/store/p1/Stainless_Steel_Roll_Pin_Replacement%C2%A0for_Crosman_1322_1377_%2F_PC77_Backpacker_760_NOW_PHILLIPS_HEAD%21.html

[Mike71]

That's what I'm using..

Would this help?
 I have the older hex head on mine and it is well made.
But if your hole is wollowed out it may not fix your issue.

https://www.alchemyairwerks.com/store/p1/Stainless_Steel_Roll_Pin_Replacement%C2%A0for_Crosman_1322_1377_%2F_PC77_Backpacker_760_NOW_PHILLIPS_HEAD%21.html