151K disassemble

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Rolf Hanson

Rolf Hanson

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I put this rifle away about 60 years ago, dirty, never disassembled or oiled, with a worn sear and broken firing pin. I watched a video on the disassemble and everything was as shown except that the disconnect pin was frozen and I had to twist it out with vice grips. The disconnector and bracket seen unaffected and I can buy a new pin but something seems wrong that the pin was frozen. No rust or other obstruction and other than riding up over the sear, seemed to function.
Any ideas or comments. Moving from SoCal to some land I bought in Texas and I'm looking forward to using the rifle again.
 
Just looked it up, it's what I thought it was. The disconnect pin should have slid out without too much resistance. It may have been a replacement that's slightly oversized. I was given one of these rifles that was missing the bolt, hammer and a few other small pieces. I was able to find everything on Ebay except the cocking handle which I made. They are not bad rifles other than being Mossberg ugly. I find mine runs kinda slow compared to other semi autos. It is fairly accurate.
 
Jackrabbit1957 said:
Is this an old Mossberg semi auto 22?
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Sure is. Has the tubular magazine . Bought it new when I was in High school. Only made the 151K in 1950 and 1951. Pin is original. Never been torn down nor oiled. Don't recall cleaning the barrel much either. Stupid kid. Never figured that I'd let it sit for 60 years before using it again. 22 semi's not much use in the city. I'll probably just get a new pin and force it in if I have to. At my age it should last long enough.It's just going to be a varmint rifle. Thanks for the reply.
 
Those Mossberg disconnector pins are very tight from the factory. They don't just slide in. Usually need a hard punch to knock them out. Heres some info on removing/installing it. The Mossberg forum at RFC has the most information on old Mossbergs you'll find anywhere. I have about 20 Mossberg semiautos based on this action. The 3 or 4 DC pins I remover were wedged in and came out hard. Pins can be replaced but be carefull you don't break one of the ears off. Go easy. Good luck. The 151K is a nice full size rifle. I have 2.
https://www.rimfirecentral.com/forums/showthread.php?t=390419
 
Scooter22 said:
Those Mossberg disconnector pins are very tight from the factory. They don't just slide in. Usually need a hard punch to knock them out. Heres some info on removing/installing it. The Mossberg forum at RFC has the most information on old Mossbergs you'll find anywhere. I have about 20 Mossberg semiautos based on this action. The 3 or 4 DC pins I remover were wedged in and came out hard. Pins can be replaced but be carefull you don't break one of the ears off. Go easy. Good luck. The 151K is a nice full size rifle. I have 2.
https://www.rimfirecentral.com/forums/showthread.php?t=390419
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Thank you. First meaningful reply I've had. This was so hard to remove, I thought that over the past 60 years it might have cold welded. I'll fix a support for the ears when I reassemble with a new pin. Can you imagine. I was probably 14 when I bought this without an adult at the local hardware store. No red tape. Nobody cared. That's what kids that age did in rural California. I'm sure it didn't cost $100.
 
Rolf Hanson said:
Thank you. First meaningful reply I've had. This was so hard to remove, I thought that over the past 60 years it might have cold welded. I'll fix a support for the ears when I reassemble with a new pin. Can you imagine. I was probably 14 when I bought this without an adult at the local hardware store. No red tape. Nobody cared. That's what kids that age did in rural California. I'm sure it didn't cost $100.
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Just be happy you still have it. Post some pics when you get it fixed. I love all those old Mossbergs. Especially all the house brands like Wards Westernfields, New Haven, Western Auto Revelation. Very under rated guns that in the last 5 years or so have really increased in price.
 
I will. Next will be my Winchester Model 37 16 Gauge single.shot. Bought it around 1952. Need to find a screwdriver long enough to reach the stock screw. Nice simple gun that seems to have a good following and nothing is broken. Just needs to be prettied up and cleaned. Should get some use when I get to my little plot of woods in east Texas.
 
entropy said:
NO, but a 1980-something F350 7.3 quadcab long box, a shotgun under the back seats just kinda fits, doncha think?
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Yup I've had one under every back seat or storage compartment that I've had. Currently it's a Rossi matched pair youth 20ga/.22 switch barrel. Solid, compact little gun and I only have 99.00 bucks in it so if I lose it no biggie.. But I've remembered to remove it from the last 3 vehicles.;)
 
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Neighbor has a 12" heavy duty screwdriver. His father in law, who has about three words of English, two of which are "Good Morning", and has a penchant for helping, came over with it. I had gotten about a half turn on the screw, but he didn't understand and he took over. He managed to split the stock, top from bottom. Actually made it easier to reach the screw. We'll live. It was a clean break, and it glued back well. Poor old guy feels worse about it than I. With a new finish it shouldn't be real visible. I was going to refinish it anyway.
 
Rolf Hanson said:
Neighbor has a 12" heavy duty screwdriver. His father in law, who has about three words of English, two of which are "Good Morning", and has a penchant for helping, came over with it. I had gotten about a half turn on the screw, but he didn't understand and he took over. He managed to split the stock, top from bottom. Actually made it easier to reach the screw. We'll live. It was a clean break, and it glued back well. Poor old guy feels worse about it than I. With a new finish it shouldn't be real visible. I was going to refinish it anyway.
Click to expand...
It won't hold. That type of break is best cured with a new stock, but if not, it should be pinned.
 
Right off 155 just south of Frankston. Bought 16 acres of trees. It's taken a while what with the rain, but we've got three acres cleared and work will start on two houses for my wife and me and for my daughter and son in law.

They ask why this move at my age, the answer is------"Too soon old, Too late smart." Got to get out of California before it's too late. Going to live a little slower.
 
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I don’t know if this thread will ever get watched, but here are a couple of comments upon finishing the reassembly of my 151k.

I watched the assembly video by ninja midget a couple of times, but had to keep referring to it as I went along. Kind of a hassle. Probably a good idea to make a written procedural order, because unless you are experienced, as I am not, there is a definite order of assembly which is not intuitive.

I should have organized the parts, before setting them aside when I took the rifle apart. Using the correct pin wasn’t much of a problem, but I mixed up the screws for the rear site and the disconnector mount and had to undo some assembly to correct the problem.

I did not have a decent punch, but found that a blunted steel nail worked for all but the disconnector pin. It also subbed for the trigger pin before inserting the pin permanently.

Once I got the trigger inserted and pinned and had the ammo feeder tube in place to hold tension on the spring, I realized that I could have just looped a length of insulated 18 gauge wire through the spring to pull it down to allow insertion of the tube. Easier than the video.

The video showed the disconnector pin being inserted with finger pressure. Maybe on some assemblies, but my mount was original, and it had taken vice grips to pull it out in disassembly. Driving it, or a new pin in with a hammer was not an option. The solution was to tap the pin in for a start, place a steel nut over the out going mounting hole and gently press the pin in with the vice grips. It also worked well when I had to reverse the procedure when I found I had used the wrong screws on the disconnector mount. It actually got easier with the second insertion.

Thanks to, all who offered advise and encouragement. I can’t wait to sight it in and use it.
 
Glad you've got it under control. I need to make a new bolt handle for mine. I was given mine from a friend, it sat in a shed for years and the rust was incredible. It was missing the hammer spring and everything rear of the bo!t including the handle. found most of the pieces on Ebay. It's an amazingly accurate rifle, runs slow compared to other semi autos.
 
I guess you're referring to the cocking knob. They are out of stock everywhere. Good luck.
 
I wonder if one of the other Mossberg cocking knobs that are available could be used of easily adapted. Maybe the only difference is the second slot.
 
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