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Replacement Bolt Assembly

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Zed View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Zed Quote  Post ReplyReply Direct Link To This Post Posted: April 06 2016 at 12:00pm
I assume that this is your new bolt assembly that requires fitting.
From the look of the 3 pictures, it appears that it's not quite closing fully on the "Go gauge" as there appears a very small gap between the RH side of the bolt and the receiver. It should close fully on the "Go Gauge". Maybe it's just the photo; but worth examining properly.
There is a reasonable pass on the No Go gauge. Now you need to check the surface contact of the bolt lugs but stoning the bolt will remove some of that margin you have on the gauge. So go carefully and keep checking the surface contact at very regular intervals.
It's nice to be important, but it's more important to be nice!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AJ Dragon Quote  Post ReplyReply Direct Link To This Post Posted: April 06 2016 at 2:13pm
Hi
 
Before I started there was just a thin line on the little lug. I did a little filling with a fine metal file and a metal finger nail file, and here are the lug contact points.  The bolt closes all the way now on the Go Gauge. 
 
I used Permanent marker on the receiver contact area to make it easier to see the contacted area 
 
and I used a silver paint pin on the big lug, as you can see some of the Permanent marker ink transferred over to the bolt and vice versa.
 
I used just a permanent marker for the small lug
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Zed Quote  Post ReplyReply Direct Link To This Post Posted: April 07 2016 at 11:52am
That's looking good. It is difficult to get identical surface areas on each lug for us amateurs. But in my bolt fitting, when I got contact on both sides and head space good; I started testing carefully at the range and inspect after a few rounds. We cannot replicate the pressure of recoil on the lugs unless it's fired; so it needs to be checked regularly to see how its settling in. I expect the contact area's to enlarge a little over time as the bolt; but only have about 20 rounds fired with the new bolt so far. So I will be keeping a close eye on how it's doing over the next for range visits. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AJ Dragon Quote  Post ReplyReply Direct Link To This Post Posted: April 10 2016 at 5:42pm
Hi
 
Well I messed up on the bolt and filed it to far, it now closes all the way on the field gauge.  But I think there is something wrong with the receiver.  This is how the big lug if making contact with the receiver.  If you look strait down into the receiver this is how it looks.  I will have to see about getting it checked out before I start buying more parts.
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote hoadie Quote  Post ReplyReply Direct Link To This Post Posted: April 10 2016 at 6:28pm
oh oh..I bin watchin this. (I'M about to learn more)
Loose wimmen tightened here
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Zed Quote  Post ReplyReply Direct Link To This Post Posted: April 11 2016 at 10:55am
That's unfortunate AJ. 
It looks like you may need to get the receiver tested and measured properly by an Enfield specialist.

What was the contact area like on the original bolt? Close examination of that may help ascertain the condition of the receiver contact area. If the original bolt was good on both lugs, then it should be possible to make a new bolt fit.
However if the receiver has been filed then it's probably gone through the case hardening; that would make it a wall hanger!
There really isn't much room for error even with a new bolt. Personally; I think using files instead of a stone has probably removed too much too quickly. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Shamu Quote  Post ReplyReply Direct Link To This Post Posted: April 11 2016 at 1:06pm
That would be my thought too. Its a delicate procedure, not something to go at like a bull in a china shop.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AJ Dragon Quote  Post ReplyReply Direct Link To This Post Posted: April 11 2016 at 11:46pm
Hi
 
I made a mistake, it was the big lug that had the angle on it and not the receiver. Which would explain why I could see contact marks on the small lug but never on the big one.  It turns out that the contact area on the big lug was right in the very corner where the lug and the bolt meet together.  I should have realized something was wrong when the contact marks on the small lug disappeared and there still were no marks on the big lug.  I wont make that mistake again with the next bolt.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Zed Quote  Post ReplyReply Direct Link To This Post Posted: April 12 2016 at 4:14am
It really is a question of very fine adjustment; so go slowly and constant checking. The fine stone will not remove so much material, but you still need to be careful.
It took me some time to do my bolt; having been almost too careful and re-checking after evry couple of strokes of the stone. But the result is worth the effort. I fired another 10 rounds with it at the weekend and it's showing reasonably good contact on both sides. I think it will probably take more rounds to get it fully settled in; so I'll keep checking it and the headspace after each outing.
Don't be put off though. Everyone makes mistakes; it's how we learn!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Shamu Quote  Post ReplyReply Direct Link To This Post Posted: April 12 2016 at 6:54am
Yes. Zed has it nailed its a slow careful process.
Mark.
Stone the HIGH points
Re mark
re test
Stone a little more (if needed)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AJ Dragon Quote  Post ReplyReply Direct Link To This Post Posted: April 12 2016 at 9:40am
Hi
 
The next bolt I plan on inspecting very closely and taking it a little bit more slowly. Unfortunately I cant do any test shots because it's still missing the trigger guard assembly.  I was expecting the parts and two books on the Enfield's from a guy on another forum two months ago, but the USPS damaged then lost then found then sent it back to sender "when it was only a couple of miles away from where I live" and then lost it again for good this time.  I am now on my third Mail Recovery Center Search Request form hoping that they will find the parts.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bear43 Quote  Post ReplyReply Direct Link To This Post Posted: April 12 2016 at 9:54am
Whatever you do don't get discouraged. You are not alone in making a mistake. The first time I ever replaced a fore-end on a No 1 Mk III* I put on a very beautiful walnut NOS fore-end. However, I didn't get the draws fitting right and I ended up with matchsticks after 10 rounds. Most of us have been right in that boat with you, AJ. Wink
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Zed Quote  Post ReplyReply Direct Link To This Post Posted: April 12 2016 at 12:13pm
At least in the USA the parts are cheaper and easier to find generally. A new bolt in Europe will probably be more than double the US price.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Shamu Quote  Post ReplyReply Direct Link To This Post Posted: April 12 2016 at 12:50pm
Keep the dinged bolt too. Its still usable for "training" & some of the home made jigs for L-E's are made from bolt sections.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AJ Dragon Quote  Post ReplyReply Direct Link To This Post Posted: April 12 2016 at 4:50pm
Hi
 
Is it suppose to be easy to remove the firing pin.  When I took the bolt assembly apart I found that I could unscrew the firing pin by hand if I turned the cocking piece counter clock wise allowing it to move forward. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bear43 Quote  Post ReplyReply Direct Link To This Post Posted: April 12 2016 at 5:24pm
It can be easy. In service the end in the cocking piece could be peened or hit to force a distortion in the threads to prevent turning, which makes the striker hard to turn and remove. If yours wasn't peened or distorted like that then they are fairly easy to remove.
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