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 Posted: Mon Jun 25, 2012 3:26 pm |
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| No-Powder-Pete |
| New Member |
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| Joined: 25 Jun 2012 |
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Hi to all...New Member Here!
Have Crosman break barrel (Remington Genesis) that has worked fine, today after breaking & cocking spring the barrel will not return to fire position. My assumption is possibly a hinge pin worked out of place somewhere inside.
Question - What is danger of spring being tripped if I take this apart?
I tried to fire with barrel dangling but seems to be a safety device locking the trigger. Have reasonable firearm repair skills but new to AG repairs...Please Help!!!
My first post - Found this forum while searching for repair ideas - Looks like a great Forum I'm sure I will be visiting often! Thanks  |
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| Posted: Mon Jun 25, 2012 6:30 pm |
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| SMP |
| Silver Status Member |
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| Joined: 04 Feb 2011 |
| Posts: 1183 |
| Location: Just south of "Out There"- Land O Lakes Ontario |
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Hi welcome to the forum.
It's possible that the cocking shoe has gotten fouled up in it's track and is now binding.
Unfortunately the only way to tell is undo the three screws and have a look. As long as you engage the safety and be mindful of the trigger mechanism you should be fine to have a peek.
If it is the cocking shoe you'll have to either send it off to a repair depot or restrain the tube and fire the spring
....check back if this is indeed what you find |
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Sean
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| Posted: Mon Jun 25, 2012 11:02 pm |
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| Slavia |
| Moderator |
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| Joined: 31 Mar 2008 |
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| Location: Waseca, Minnesota, USA |
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| Quote: |
It's possible that the cocking shoe has gotten fouled up in it's track and is now binding.
Unfortunately the only way to tell is undo the three screws and have a look. As long as you engage the safety and be mindful of the trigger mechanism you should be fine to have a peek. |
SMP is right. One screw behind the trigger and two up front and the action will lift out of the stock. Put the safety on, finger off the trigger, and pointed in a safe direction of course. It will look something like this:
The linkage is bowed away from the compression tube for clarity. In use the stock would keep it pegged right up against the tube.
You do indeed have an "anti-beartrap" mechanism. The trigger won't work until the barrel closes, pulling the linkage forward and moving that little tab out of the way of the trigger pin.
The cocking shoe that SMP mentions is a wide spot on the linkage that rides inside the tube and pushes against the piston. Two words of caution: First, if you can get the barrel shut be sure to put a pellet in the breech before pullng the trigger (i.e., don't "dry" fire it). Second, if you defeat the anti-beartrap and pull the trigger with the barrel open then the spring will swing the barrel shut, with the risk of bending the barrel when it stops. |
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 ¡Listo! ¡Apunte! ¡Fuego! |
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| Posted: Tue Jun 26, 2012 12:07 am |
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| No-Powder-Pete |
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Thanks guys...
Yes, it appears to be the shoe has dislocated from it's working position, however it's not bound up. The barrel & the cocking lever swing freely.
Looking in on the spring, the end of cocking lever shoe travels freely over top of spring (held upside down) without any resistance but hits dead against the rear of the piston.
Without really knowing what the shoe looks like or how it tracks, I'm surprised it moves freely without binding. Have shaken it, can't hear anything rattling inside such as a piece broken off the shoe.
Your warning tells me I can't do anything with it myself & need to send it in for repair. Unless... maybe I could come up with a way to compress the spring enough to take pressure off of end cross bolt & remove it, then ease off the spring pressure to disassemble the tube? Starting with an already compressed spring could be more difficult I expect.
I don't see any advantage in discharging spring as it would most likely compound the problems. |
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| Posted: Tue Jun 26, 2012 7:32 am |
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| Slavia |
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| Quote: |
| Yes, it appears to be the shoe has dislocated from it's working position, however it's not bound up |
There is a wide opening at the forward end of the slot in the tube. Can you flex the linkage away from the tube enough to get the shoe out of there for inspection?
Another thought - do all the visible coils of the spring look right? (As in could the shoe be binding on a broken spring?)
| Quote: |
| maybe I could come up with a way to compress the spring enough to take pressure off of end cross bolt & remove it, then ease off the spring pressure to disassemble the tube? Starting with an already compressed spring could be more difficult I expect. |
You're on the right track, although I would try to get the spring uncocked before taking it apart. A spring compressor is a necessity for going inside, but it is made for the preload pressure of an uncocked spring. Try here:
http://www.kermitairgunclub.com/airguntips/compressor/
There is a square nut to the rear of the trigger (the thing the rear mounting screw turns into). That as well as the cross pin need to be removed before the compressor can relax the spring. |
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¡Listo! ¡Apunte! ¡Fuego! |
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| Posted: Tue Jul 10, 2012 3:29 pm |
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| No-Powder-Pete |
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I'm not so sure the spring is compressed?
Measuring from the outside butt end of the tube (point past trigger guard, not shown in photo) to the point between the plunger & end of spring (cut out where foot should be attached) is about 6.25".
The spring coil is not tight (coils are not touching) but don't know how tight it would be when cocked vs uncocked.
Your thoughts?
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| Posted: Wed Jul 11, 2012 7:57 am |
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| Slavia |
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| Location: Waseca, Minnesota, USA |
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I think the gun might be cocked and the spring compressed. I say that for three reasons: First, it looks like the rear end of the piston is back by the sear (right on your photo). Second, the spring coils are relatively close together (compare to my G1). Third, the coils are nearly perpendicular to the span of the spring. (The coils of the G1's uncocked spring lay at more of an angle.):
You say that the barrel swings freely, and that the cocking shoe slides freely over the spring. Check to see if the anti-beartrap link is binding. (That's the slotted strap that goes all the way back to the trigger.) Is it possible to slide the cocking arm and shoe slightly to the rear, to see what's under there that might be binding? The spacer (part number CRS5177B010) might be a candidate. Here's the parts diagram:
http://www.crosman.com/pdf/manuals/R1K77PG-EVP%20&%20PL%20%20OLD.pdf |
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¡Listo! ¡Apunte! ¡Fuego! |
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| Posted: Sat Jul 14, 2012 2:36 am |
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| No-Powder-Pete |
| New Member |
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| Joined: 25 Jun 2012 |
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Replacement...
Thanks for all the help, when time allows will take serious look at repairing.
Problem being that it will be benched awhile & I need a replacement as it's my camp rifle & gets used a lot.
Any thoughts on a decent replacement in the $200 max range? Looked at the Benjamin Trail MP in .177 for $180 but not sure due to some of the reviews. Sounds like a gamble in getting a "good one".
If I buy one at Wally-Mart it's easier to return & replace until I find the "good one", but that's a hassle & should not have to deal with in search of a quality product.
Any suggestions or comments? |
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