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Discussion Starter · #1 ·
Can anyone help me with a model 81 bolt disassembly?, Pictures would help I have never took one apart and I have a broken firing pin that I need to replace...

Thanks

mtnsmith...........
 

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Remove the bolt from the receiver by pulling it to the rear. Once the bolt is at its rearmost position, pull and hold the trigger to allow the bolt to pull out the rest of the way.

As the bolt comes out of the receiver, it is in the cocked position and the cocking-piece, at the rear of the bolt is in its "cocked groove," which is at about 7 o'clock (when the bolt handle is at 3 o'clock). Slowly, and without letting it slam forward, pull and turn the cocking-piece counter-clockwise until it rests in its "firing groove" at about 6 o'clock.

Note: To cock the bolt, you will need to press the stud on the cocking-piece, against a benchtop or suitable piece of wood. Pull and rotate the bolt, until the stud will come to rest in the "cocked groove." It will need to be cocked before trying to reinstall into the receiver.

To disassemble the bolt, first (with the bolt uncocked) remove the small screw that is near the cocking-piece. You can now remove the cocking-piece assembly. You will next need to drive out the small retaining pin that retains the rotating, forward piece. Once this pin is out, the forward piece will come out and you will have easy access to the firing pin and spring. Reinstalling the retaining pin may require dressing up the holes in the bolt in order for it to go back in peacefully. It's supposed to be a tight fit, to keep the pin from falling out. So, be patient on reassembly and don't remove too much metal all at once.

Here's a pic of the bolt afer disassembly, including my broken firing pin too.
 

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This thread is right on time. Picked up a 1999 model 81TSDU Saturday. When I was trying to get the bolt out to look at the bore it wouldn't release. After a couple of tries at the store figured out that the trigger needed to be pulled to dryfire (I know) to allow the bolt to be removed. When I got it home I went ahead and put a spend round in so I wouldn't have to dryfire again. I need to take mine apart to clean what looks to be the original grease off the spring and give it a look over before I take it to the range next weekend. Sent out a request from Marlin today for an owners manual and your post on how to disassemble couldn't have come at a better time. Thanks.
 

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Discussion Starter · #4 ·
Tedak said:
Remove the bolt from the receiver by pulling it to the rear. Once the bolt is at its rearmost position, pull and hold the trigger to allow the bolt to pull out the rest of the way.

As the bolt comes out of the receiver, it is in the cocked position and the cocking-piece, at the rear of the bolt is in its "cocked groove," which is at about 7 o'clock (when the bolt handle is at 3 o'clock). Slowly, and without letting it slam forward, pull and turn the cocking-piece counter-clockwise until it rests in its "firing groove" at about 6 o'clock.

Note: To cock the bolt, you will need to press the stud on the cocking-piece, against a benchtop or suitable piece of wood. Pull and rotate the bolt, until the stud will come to rest in the "cocked groove." It will need to be cocked before trying to reinstall into the receiver.

To disassemble the bolt, first (with the bolt uncocked) remove the small screw that is near the cocking-piece. You can now remove the cocking-piece assembly. You will next need to drive out the small retaining pin that retains the rotating, forward piece. Once this pin is out, the forward piece will come out and you will have easy access to the firing pin and spring. Reinstalling the retaining pin may require dressing up the holes in the bolt in order for it to go back in peacefully. It's supposed to be a tight fit, to keep the pin from falling out. So, be patient on reassembly and don't remove too much metal all at once.

Here's a pic of the bolt afer disassembly, including my broken firing pin too.
Thank you so much Tedak...

mtnsmith....................
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I am having trouble re-assembling the cocking piece in the bolt, the screw hole collar on the spring is about a 16th from lining up with the screw hole in the bolt. Any tips on alignment?

Edit: Got it, what a PITA. Could still use some tips on re-assembly because there has to be an easier way than I took. The post with the pic was a great help. Thanks.
 

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Never mind I finally figured it out days later. Make sure that you have baindaids on hand. Make sure that the back rounded end to the bolt is in out position or in the short groove not the deep oval groove. If the threaded hole or the part that you screw into is not lined up wedge your screw driver in between the rounded head and the spring and turn your screw driver back and forth which ever way you need to line up the holes. Then with the bolt carrier in a vice work your screw driver in betwen the spring end and the round head and push down and forward so that the spring collapses and the holes lien up. Then withy your third hand put the screw in and tighten. Hope this helps a little
 

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Hello to everyone who helped me in these 80DL threads.

I ordered a new firing pin and decided to go through the entire gun, since I've had it for 23 years and have never done so. I took apart the bolt and ran into the same issues as others; "uh, the holes don't line up." I then searched and saw, "don't take that small screw out if you don't have to." Sadness. :shot:

Well, I figured out an easy way, no vice or extra hands needed. It's similar to Mark's reply above, but instead of a screwdriver, I used a quarter, which happens to be just the right size.

I took a small diameter, long nail (moulding nail is what I had on hand) and just pushed the round cylinder away from the end of the bolt. Then I wedged a quarter into it (after trying a couple of other makeshift shims) and inserted the whole thing back in. The holes lined up, but you could carefully move the quarter around to pry more if it needed to. It was all back together with minimal effort and about 20 seconds.

Pic below to help out. Thanks for the help in this thread and others everyone. I hope this helps more idiots like me put stuff back together after they shouldn't have taken them apart.

 

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Hello to everyone who helped me in these 80DL threads.

I ordered a new firing pin and decided to go through the entire gun, since I've had it for 23 years and have never done so. I took apart the bolt and ran into the same issues as others; "uh, the holes don't line up." I then searched and saw, "don't take that small screw out if you don't have to." Sadness.


Well, I figured out an easy way, no vice or extra hands needed. It's similar to Mark's reply above, but instead of a screwdriver, I used a quarter, which happens to be just the right size.

I took a small diameter, long nail (moulding nail is what I had on hand) and just pushed the round cylinder away from the end of the bolt. Then I wedged a quarter into it (after trying a couple of other makeshift shims) and inserted the whole thing back in. The holes lined up, but you could carefully move the quarter around to pry more if it needed to. It was all back together with minimal effort and about 20 seconds.

Pic below to help out. Thanks for the help in this thread and others everyone. I hope this helps more idiots like me put stuff back together after they shouldn't have taken them apart.

i have done all of this and for the life of me i cant get it the quarter isn't wide enough. I wish someone would do a youtube video of this! Im about to have a damn stroke! This is why you never let friends mess with your guns. Should the front piece that houses the firing pin should that be taken off before attempting this part because no matter how much i try it only lines up half way.
 
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