Crosman Model 140 sealing problem.

[gkenny]

I recently purchased a nice crosman model 140 in .22 cal.

It seemed to shoot nicely at first, after a little oil, but after a few shots, it just made a 'click' sound after about 6 pumps, and did not fire.

I removed the pellet, and saw nothing out wrong except that the safety would not move where before it did.

I decided to take it apart to see what was wrong. When I started to remove the round bolt on the bottom side of the stock, which holds the gun to the wood stock, I foind that it was loose. When I tightened it, the safety could be moved again and it fired normally.

I tried to fire it again after 5 pumps, and again it did not fire, just clicked, even with a hand-tightened tightened stock bolt. I could hear a small leak of ait around the bolt area.

I decided to remove the pellet and take the gun apert to see what was wrong, and as I removed the 'spoon' type bolt, I noticed a flat head screw at he bottom of the pellet ramp. When I turned this screw to remove it, the gun fired!

Have you ever heard or experienced this problem?

Any help or suggestions will be greatly appreciated.

Thank you and regards, gkenny.

T decided

[BillK]

This has some info on the 140.  It's a good reference.
http://stevespages.com/pdf/crosman_factory_service_manual_all.pdf

[TimmyMac1]

I recently purchased a nice crosman model 140 in .22 cal.

It seemed to shoot nicely at first, after a little oil, but after a few shots, it just made a 'click' sound after about 6 pumps, and did not fire.

I removed the pellet, and saw nothing out wrong except that the safety would not move where before it did.

I decided to take it apart to see what was wrong. When I started to remove the round bolt on the bottom side of the stock, which holds the gun to the wood stock, I foind that it was loose. When I tightened it, the safety could be moved again and it fired normally.

I tried to fire it again after 5 pumps, and again it did not fire, just clicked, even with a hand-tightened tightened stock bolt. I could hear a small leak of ait around the bolt area.

I decided to remove the pellet and take the gun apert to see what was wrong, and as I removed the 'spoon' type bolt, I noticed a flat head screw at he bottom of the pellet ramp. When I turned this screw to remove it, the gun fired!

Have you ever heard or experienced this problem?

Any help or suggestions will be greatly appreciated.

Thank you and regards, gkenny.

T decided

The 140 has a short breech screw vs the 1400 which has the barrel to tube spacer so the breech screw and rear screw are both longer. If the breech screw is too long it bottoms on the pin that must travel to let the valve release air. When you loosened the breech screw you allowed the captured pin to move.
My cousin had one of these situations on the bench one time and when he loosened screw/released the pin the air stored bounced off the flat blade driver and propelled a pellet in my direction at relatively low velocity and caught me in the right wrist. This is the only time I have ever been hit by a pellet in my life. It got my attention big time and I immediately turned my cousins vise at an angle so the guns he worked on aimed at the back of the bench instead of me.

THEY ARE ALL LOADED! ALWAYS! When they point at you, you should feel a sick feeling. I hate muzzles pointed in my direction so I never point at anyone cause I could not live with myself if I slipped up and shot anything I did not want to shoot. My cattle dog constantly gets in front of muzzles because she is programmed to be at my side for the rest of her life. Cali spends her life in harms way at the foot of the shooting bench. She has never even caught a ricochet so she is overly confident in my ability to keep her safe. That is dangerous and I'm constantly watching where she is to make sure she is not around someone who hasn't the proper skills. I wish I could teach her to not trust people but I can only teach her that a cold line means she can go downrange.
BE SAFE!

TimmyMac1

[bbv13]

I'm not sure what's going on but it sounds like it needs to be torn down so you can look at the seals and parts to see if something is damaged or worn out. There's no telling what you will find when you get into it?

I just finished rebuilding a Crosman 1400 which is similar. There's several videos on YouTube about rebuilding a 140 that helped me a lot. I got my reseal kit from Tim at Mac1 and it worked out great. His video on the flat top piston really helped as well. I see Tim has already commented on your problem and his concern is justified. The old Crosmans are always cocked so be careful. If it's holding air it could go off unexpectedly.

Bryan

[gkenny]

I'm not sure what's going on but it sounds like it needs to be torn down so you can look at the seals and parts to see if something is damaged or worn out. There's no telling what you will find when you get into it?

I just finished rebuilding a Crosman 1400 which is similar. There's several videos on YouTube about rebuilding a 140 that helped me a lot. I got my reseal kit from Tim at Mac1 and it worked out great. His video on the flat top piston really helped as well. I see Tim has already commented on your problem and his concern is justified. The old Crosmans are always cocked so be careful. If it's holding air it could go off unexpectedly.

Bryan

Thank you Bryan. I have a seal kit ordered and will be careful with the repair.

Regards, gkenny.

[bbv13]

We should treat all guns like they are loaded. The issue that bothered me about yours is that you pumped it up and it didn't fire. If you have any questions about doing the reseal feel free to ask. If I can't help you someone here on the GTA can and will.

Bryan

[gkenny]

We should treat all guns like they are loaded. The issue that bothered me about yours is that you pumped it up and it didn't fire. If you have any questions about doing the reseal feel free to ask. If I can't help you someone here on the GTA can and will.

Bryan

I Agree totally with you Bryan, and I will be very careful with this re-seal. It is nice to know that there are people like yourself who are willing to help!

Thanks for your help and concern.

Regards, gkenny.

[avator]

From first hand experience. I resealed a '66 760. I had everything out of the receiver when I put the piston in it. Warning... this gun cocks itself on the first pump. If nothing is holding the cocking cap in when you push the piston in, it's best to have the back end aimed in a direction other than your... ummm.... lap.  SON-OF-A-*%@#* !!!

[gkenny]

From first hand experience. I resealed a '66 760. I had everything out of the receiver when I put the piston in it. Warning... this gun cocks itself on the first pump. If nothing is holding the cocking cap in when you push the piston in, it's best to have the back end aimed in a direction other than your... ummm.... lap.  SON-OF-A-*%@#* !!!

Thank you very much Avator, I will be very careful with this part on the disassembly!

Regards, gkenny.

[bbv13]

From first hand experience. I resealed a '66 760. I had everything out of the receiver when I put the piston in it. Warning... this gun cocks itself on the first pump. If nothing is holding the cocking cap in when you push the piston in, it's best to have the back end aimed in a direction other than your... ummm.... lap.  SON-OF-A-*%@#* !!!

  That's a mistake you only make once

Bryan

[avator]

Yeah, I did a few hot laps around the gun room.