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-   -   H&r m12 (http://forums.thecmp.org/showthread.php?t=280360)

nate 04-16-2021 07:58 PM

In case you don’t have the steps for removing and installing the bolt.
1. Lift up on the bolt handle
2. Put safety in fire position
3. Pull and hold the trigger with one hand, then push forward on the bolt release lever with the other hand
4. With the bolt release held all the way forward, release the trigger and slide the bolt out of the receiver.
To install.
1. With the safety in the fire position, pull and hold the trigger with one hand, then push and hold the bolt release forward. Release the trigger.
2. Make sure the bolt handle is in the normal open position and slide the bolt forward making sure the bolt body is aligned with the loading platform.
3. When the bolt has entered the loading port area, release the bolt release lever.
Don’t know if the sequence has anything to do with the problem you are having with the trigger but it may be possible. This is from the manual for the rifle.

Calfed 04-16-2021 09:33 PM

Quote:

Originally Posted by nate (Post 2036649)
In case you donít have the steps for removing and installing the bolt.
1. Lift up on the bolt handle
2. Put safety in fire position
3. Pull and hold the trigger with one hand, then push forward on the bolt release lever with the other hand
4. With the bolt release held all the way forward, release the trigger and slide the bolt out of the receiver.
To install.
1. With the safety in the fire position, pull and hold the trigger with one hand, then push and hold the bolt release forward. Release the trigger.
2. Make sure the bolt handle is in the normal open position and slide the bolt forward making sure the bolt body is aligned with the loading platform.
3. When the bolt has entered the loading port area, release the bolt release lever.
Donít know if the sequence has anything to do with the problem you are having with the trigger but it may be possible. This is from the manual for the rifle.


I also have an H&R model 5200, which is the civilian version of the M12. I notice that I have to pull the trigger to replace the bolt in the receiver. With the M12, it slides in with only the bolt release lever being pushed forward.

Calfed 04-16-2021 09:34 PM

I took the barreled receiver out of the stock and took a few pictures. The trigger mechanism looks clean.

A prior owner bedded the action.

https://i.imgur.com/QB0DU22.jpg?1

https://i.imgur.com/kcBbmXv.jpg

https://i.imgur.com/VyRUtOK.jpg?1

https://i.imgur.com/loiQ8Yt.jpg?1

nate 04-16-2021 10:24 PM

The manual is available on rimfire central forum in free pdf download and it has a parts breakdown of the trigger. Whoever did the bedding on your rifle did a really neat looking job.

broomhandle 04-16-2021 11:09 PM

Hi Nate & hebes 405,

Honestly, just wide guess's on my part.
Does that wire spring look correct? Can it be rubbing on the bedding job?
Calfed does the trigger action work correctly out of the stock?

Since the stock was bedded, did you possibly bend the walls on the trigger unit a tad when the action was removed causing a bind?

When I was preparing one of my 03A3's DRILL rifles for shooting. I bought a NOS bolt it did not fit the receiver. The bolts on the other thee rifles just dropped in, without the barrel mounted. I assumed I knew were the problem was. I did screw up a costly part ONCE on another project!

I measured all the bolt dimensions I could. The new one was with in tolerance! I used black marker to discover the tight spot. No JOY!

I thought I knew three spots that might cause a problem, went to see the last old gunsmith in the area. "You may be right" with a smile he try's it looks at it.
He whips out a fine stone makes two pass's with the stone at the other end of the bolt & it drops right in! He smiles & said the first step to learning stuff it to admit you don't know! No charge! :GS:

Hope you sort it out?
broom -still willing to learn

navyrifleman 04-17-2021 07:56 AM

As others have suggested, your problem could be simply that the trigger mechanism has become gummed up. This happens often when gun oil dries and turns to something like shellac.

Try squirting some Ronsonol or Zippo lighter fluid into the trigger mechanism and work the parts to see if it loosens up. Let it dry and then re-oil. This worked well for an old Remington .22 that I have.

I keep a bottle of Ronsonol around all the time for use as a solvent. It works well to degrease a part prior to bluing, as well as cleaning old oil and grease off firearms. It also works great to remove glue and price tags.

Hobbs 04-19-2021 10:42 AM

Calfed
I think your problem is with sear engagement or trigger pull is slightly too lite. I have an extra copy of M12 manual that I will give you if you haven't solved your problem. I have had the same problem in the past.

Email me (PM never seems to do right) and and I'll mail you a manual which gives good instructions.

hobbsards@aol.com

Calfed 04-20-2021 01:19 PM

Thanks, guys. I swapped the bolt with my H&R 5200 (civilian version of the M12) and noted the same problem with the M12 and noted no problem with the M12 bolt in the 5200, so it does not appear to be the bolt.


I'll look at the trigger

hebes405 04-29-2021 08:17 PM

Have you solved your problem yet?

broomhandle 05-02-2021 02:25 PM

Hi Guys,

I for one have lots of interest in knowing the odd occurrence's & happing's on a M-12 WE need to know how to keep all of them running!

All of us are still wishing you a quick fix to the problem,
broom


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