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Author Topic: Does your 140 or 1400 squeak ?  (Read 493 times))

Offline bantam5s

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Does your 140 or 1400 squeak ?
« on: May 18, 2022, 12:22:27 AM »
When you pump you gun does it squeak ?


I was shooting my '65 140 and was reminded of a reason why I don't shoot it as often as I should, maybe more of a subconscious reason but a reason none the less.

It squeaks when I pump it, and no matter where I put oil I can not remedy this issue.
I don't see anything rubbing,  but maybe theres something I'm missing.
Could it really just be becaise theres no felt wiper on the piston ?




These 140's are a great simple rugged gun, theres a lot to love with the only negative being the sliding cover bolt, but that squeak is annoying.

I'm not giving up on the gun, but I just can't figure out why it's squeaking when I pump it.
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Offline DanD

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Re: Does your 140 or 1400 squeak ?
« Reply #1 on: May 18, 2022, 01:26:23 AM »
I have a couple Sheridans that are the same way, and I've wondered how to get them to stop.
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Offline 19Sheridan57

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Re: Does your 140 or 1400 squeak ?
« Reply #2 on: May 18, 2022, 08:15:39 AM »
   I have had several 140/1400's over the years, & a couple of them squeaked. Never could get oil to the right place to stop it.
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Offline Back_Roads

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Re: Does your 140 or 1400 squeak ?
« Reply #3 on: May 18, 2022, 08:21:26 AM »
 The squeak could possibly be air passing by the check valve, like the reed on a wind instrument.
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Offline OTmachine

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Re: Does your 140 or 1400 squeak ?
« Reply #4 on: May 18, 2022, 08:56:48 AM »
The squeak could possibly be air passing by the check valve, like the reed on a wind instrument.
+1
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Online TerryM

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Re: Does your 140 or 1400 squeak ?
« Reply #5 on: May 18, 2022, 09:34:14 AM »
  My pumpers have a repertoire of different squeeks, clicks and toots.  I just live with them.  ;)
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Offline bantam5s

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Re: Does your 140 or 1400 squeak ?
« Reply #6 on: May 18, 2022, 12:27:48 PM »
The squeak could possibly be air passing by the check valve, like the reed on a wind instrument.
It's a pretty loud squeak, but maybe that's it.
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PCP? I never touched the stuff !
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Oh!, no I don't have one of those.

Offline Blowpipe Sam

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Re: Does your 140 or 1400 squeak ?
« Reply #7 on: May 18, 2022, 10:07:02 PM »
I rebuilt one of mine with a Mac1 O ring piston.  If I pump it briskly it will squeak right at the end of each pump stroke.  Pumped a little slower it does not squeak.  The tendency to squeak gets worse as the pressure goes up.  I’m thinking my problem is the O ring seal “burping” air past the seal when it is pumped too hard.  I’ve never heard a parachute seal squeak on any of my Crosman’s unless it needs oiling.
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Offline OTmachine

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Re: Does your 140 or 1400 squeak ?
« Reply #8 on: May 18, 2022, 10:47:36 PM »
I rebuilt one of mine with a Mac1 O ring piston.  If I pump it briskly it will squeak right at the end of each pump stroke.  Pumped a little slower it does not squeak.  The tendency to squeak gets worse as the pressure goes up.  I’m thinking my problem is the O ring seal “burping” air past the seal when it is pumped too hard.  I’ve never heard a parachute seal squeak on any of my Crosman’s unless it needs oiling.
Sounds like you may have a belled out pump tube
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Offline Blowpipe Sam

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Re: Does your 140 or 1400 squeak ?
« Reply #9 on: May 18, 2022, 11:02:30 PM »
I rebuilt one of mine with a Mac1 O ring piston.  If I pump it briskly it will squeak right at the end of each pump stroke.  Pumped a little slower it does not squeak.  The tendency to squeak gets worse as the pressure goes up.  I’m thinking my problem is the O ring seal “burping” air past the seal when it is pumped too hard.  I’ve never heard a parachute seal squeak on any of my Crosman’s unless it needs oiling.
Sounds like you may have a belled out pump tube
Thanks for the tip.  I’ll check it with some calipers.  Fortunately I have another 1400 pump tube if needed.
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Hatsan Mod 125  .25
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Hatsan Mod  95.  .22
Ruger Impact Max .22
FDAR Xisico XS60c .22 
Crosman 1400 .22.  3rd model
Crosman 1400 .22.  2nd model
Crosman 1400 .22.  1st. Model
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Offline bantam5s

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Re: Does your 140 or 1400 squeak ?
« Reply #10 on: May 18, 2022, 11:19:20 PM »
I have bought seal kits from Crosman600repair in the past, but I looked through my Ebay purchase history and didn't see a 140 seal kit there, so I'm thinking I must have went with a Mac1 kit.

Then again maybe I got a kit from Bakerairguns?
I found a post where I mentioned having payed $35 for my seal kit, but I never mentioned where I got it.

I'm definitely not going to take my gun apart to see what kind of seal kit I have in it, not that knowing this would stop the squeaking.
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PCP? I never touched the stuff !
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Offline OTmachine

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Re: Does your 140 or 1400 squeak ?
« Reply #11 on: May 18, 2022, 11:51:26 PM »
I rebuilt one of mine with a Mac1 O ring piston.  If I pump it briskly it will squeak right at the end of each pump stroke.  Pumped a little slower it does not squeak.  The tendency to squeak gets worse as the pressure goes up.  I’m thinking my problem is the O ring seal “burping” air past the seal when it is pumped too hard.  I’ve never heard a parachute seal squeak on any of my Crosman’s unless it needs oiling.
Sounds like you may have a belled out pump tube
Thanks for the tip.  I’ll check it with some calipers.  Fortunately I have another 1400 pump tube if needed.
I hope that I was helpful.  Usually you can tell by measuring the O.D. In various places.  If you do find a bulge, you could repair it by swaging it with pre-bored soft jaws in a 3-jaw lathe chuck using a to size mandrel on the I.D.
IMHO, The usual cause of belling is from over pumping.
« Last Edit: May 18, 2022, 11:53:42 PM by OTmachine »
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Offline sicumj

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Re: Does your 140 or 1400 squeak ?
« Reply #12 on: May 19, 2022, 09:23:31 AM »
My Benjamin 132 squeaks and my assumption was the inner chamber was wore from use.  I am pretty sure the squeaking is from air escaping past the plunger.  I made an o'ring plunger and that helped but it still is underpowered.  I will have to check the OD for bellying.  Thanks for the tip.
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Offline OTmachine

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Re: Does your 140 or 1400 squeak ?
« Reply #13 on: May 19, 2022, 06:50:48 PM »
My Benjamin 132 squeaks and my assumption was the inner chamber was wore from use.  I am pretty sure the squeaking is from air escaping past the plunger.  I made an o'ring plunger and that helped but it still is underpowered.  I will have to check the OD for bellying.  Thanks for the tip.
A backup ring may help.
https://www.sealingandcontaminationtips.com/backup-rings-help-prevent-o-ring-migration/
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Offline Air Head

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Re: Does your 140 or 1400 squeak ?
« Reply #14 on: May 20, 2022, 02:55:46 AM »
I rebuilt one of mine with a Mac1 O ring piston.  If I pump it briskly it will squeak right at the end of each pump stroke.  Pumped a little slower it does not squeak.  The tendency to squeak gets worse as the pressure goes up.  I’m thinking my problem is the O ring seal “burping” air past the seal when it is pumped too hard.  I’ve never heard a parachute seal squeak on any of my Crosman’s unless it needs oiling.

I think it's making a tighter seal with that tough Durometer O-ring. If you pump fast, it's rigid enough to clear oil out of the way quickly, Causing a squeak. Not a bad thing because it's so durable.

It probably produces more pressure than the stock pump cup. I believe mine do.


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Offline bantam5s

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Re: Does your 140 or 1400 squeak ?
« Reply #15 on: May 20, 2022, 01:31:59 PM »
Anyone who can just avoid the squeak by pumping differently is lucky.

If I pump my gun quickly I don't notice the squeak as much,  but there's basically no way to avoid it unless I have the gun in my lap upside down which is very awkward.

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Offline sicumj

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Re: Does your 140 or 1400 squeak ?
« Reply #16 on: May 20, 2022, 05:53:29 PM »
     I haven't tried a backup ring but I have plenty of area on the piston to try it.  I think an o'ring should work.  I do have some teflon seals from McMaster Carr that may fit.  Think I will try double o'rings first and see what velocity I get.  Thanks again.


Jim
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Offline OTmachine

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Re: Does your 140 or 1400 squeak ?
« Reply #17 on: May 20, 2022, 07:05:51 PM »
     I haven't tried a backup ring but I have plenty of area on the piston to try it.  I think an o'ring should work.  I do have some teflon seals from McMaster Carr that may fit.  Think I will try double o'rings first and see what velocity I get.  Thanks again.


Jim
A buna-n o-ring energized teflon o-ring would probably work Great.  Another thing that I sometimes do is to add another o-ring with some space between it and the sealing o-ring so I can put some “permanent” lubrication trapped between the two o-rings.  My .02
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Offline bantam5s

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Re: Does your 140 or 1400 squeak ?
« Reply #18 on: May 27, 2022, 08:51:40 PM »
I've been shooting my 140 a bunch this week, and surprisingly it doesn't seem to be squeaking as much now.

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PCP? I never touched the stuff !
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Oh!, no I don't have one of those.

Offline Air Head

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Re: Does your 140 or 1400 squeak ?
« Reply #19 on: May 28, 2022, 03:25:36 AM »
Kinda like a Woman....show her a little love and she quiets down.

Cheers!
Rich
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