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  #1  
Old 10-16-2012, 06:54 PM
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Join Date: Oct 2012
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Nylon 66 failes to reset


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My dad has had a Nylon 66 in Seneca Green since new. Shot it all the time as a kid; coon, rabbit, squirrel. Been sitting in the closet for the last 30 years only to come out for the occasional coon in the barn. Receiver cover hasn't been off for at least this long.

His grandkids, including my daughter, are all getting to the age of learning to shoot. Pulled the nylon out, removed the receiver cover, cleaned the bore. Cover back on, ran a hundred rounds through it. Lots of spent shells caught in the closing bolt, probably 20~25. 9 or 10 rounds jammed feeding in, caught by the bolt half way into the bore.

Used http://www.nylonrifles.com/Nylonpdf/66DIS.pdf to help with dis-reassemble. Took a while but everything seemed to go good. Took it out, one round in it, fire perfectly. Loaded another round, perfect. Filled the magazine, first round perfect, second round the trigger wouldn't pull. Racked the bolt to clear the round and load a new one. Tried it again and same thing. First round fired fine, second round dead trigger like it won't cycle the bolt and hammer back to reset the hammer on the sear.

I have tried it about thirty times now and it's the same thing every time. Have primarily used Winchester white box 36 grain, but have tried CCI mini-mags 40 grain as well.

Any ideas?
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  #2  
Old 10-16-2012, 07:45 PM
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Good luck. The Nylon 66 is the one gun I learned the hard way never to disassemble beyond removing the receiver cover for cleaning. After a cleaning, my next step would have been to try as many different loads as I could find.
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  #3  
Old 10-16-2012, 09:27 PM
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Really wasn't that hard to reassemble give I had a step by step with pictures. Something is just a tiny bit off and I'm not sure which part it is.
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  #4  
Old 10-17-2012, 03:14 AM
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I'm not that familar with a Nylon 66, but will try offering some suggestions. I'd say the problem with the case jams and the the trigger reset is the same issue. The bolt should contact the case head to chamber the round. Since the bolt is contacting the side it means the round isn't held high enough for rear contact or the bolt isn't traveling far enough to the rear after firing. Since the sear isn't being reset I'd guess the bolt isn't getting full travel.
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  #5  
Old 10-17-2012, 03:31 AM
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Quote:
Originally Posted by 79 IH Scout View Post
Really wasn't that hard to reassemble give I had a step by step with pictures. Something is just a tiny bit off and I'm not sure which part it is.

Oh, I am familiar with your story. Seemed so simple, didn't it?
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  #6  
Old 10-17-2012, 07:49 AM
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Been there

That 66 is so well balanced, mechanically, that it will still feed most of the time with a broken spring, or an out of service spring in it's feed chain. Mine was "fixed" by a service center, but still had to eventually go back to Remington for final repair. Try about ten rounds, loading only one at a time in the magazine. I'll bet they all fire and eject just fine, without another round coming up too quick, and jamming into the bottom of the bolt.

This was sometimes before 1972. So I can't come up with the work order from Remington.
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Old 10-17-2012, 08:21 AM
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Remington really does mean what they say about not needing oiling or any disassembly. I never clean anything other than maybe the bore every 500 rounds or so.
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  #8  
Old 10-19-2012, 02:38 AM
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I think Monty is on the right track, but try looking at the magazine tube. That is the only part you haven't mentioned. Could dirt or rust be limiting the spring tension and the new round is not seating in the cartridge lifter and that limits travel enough to cause the problem? Just a thought, Lou
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Old 10-20-2012, 07:36 PM
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I have to say the cartridge lifter and spring need to be considered, and then the bolt return spring should be checked. If the bolt spring is not in there perfectly and is binding slightly on recoil that could be causing the trouble. It may be as simple as turning it a bit so it sits differently in the tube and on the guide rod. Depending of course on how it is set up, I have never actually taken one apart all the way for deep cleaning.
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  #10  
Old 10-21-2012, 08:45 AM
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After I disassembled, cleaned, and reassembled, everything feeds fine. The problem is that it fails to reset after firing and "light strikes" the second round. With the receiver cover off, I held the ejector in place while firing. The hammer does not reset on the sear. My only guess is that the disconnector is slightly bent. The bolt and hammer both travel freely. The hammer seats properly on the sear every time when manually charged.
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  #11  
Old 10-23-2012, 10:19 AM
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Obviously the bolt does not have enough rearward travel. CCI mini-mags should make that happen if it was a small problem but that isn't working so it has to be mechanical. Something is impedeing the bolt travel. Now what is it. This is where the worms come out. Too stiff a return spring? Cartridge lifter hanging up and not letting the bolt travel fully? You mentioned disconnector. Bolt binding in the raceway? Process of elimination now friend. Good luck and aproach it with an eye toward what if? Let us know for future refrence and we can all learn. Lou
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  #12  
Old 10-25-2012, 01:59 PM
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I'd check for a straight bolt spring guide rod, or junque in the hole where it's rear end resides, limiting bolt travel.


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