Disassembly and reassembly of Marlin 336, West Point 33 and Glenfield 30 Breech Bolt

Breech Bolt of the Marlin 336 and variants, complete disassembly and assembly
Link to the complete disassembly of the rifle:
• Disassembly of the Mar...
Link to the reassembly of the rifle:
• Reassembly of Marlin M...
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[@Kanooky_Jones]

I still come back to this. Quality stuff.

[@boscoman69]

Excellent video & instructions. Thanks!

[@megatrends]

Thank you …. I have a 1976 336C and this video is essential. Very grateful. Thank you.

[@Welder6131]

Very good, thanks for the walk through on disassembly!

[@harbortim1]

Great video. Helped me immensely. Thank you.

[@Silojohnson]

Thanks!!! I'm rebuilding a glenfield 30a barn find.

[@vspero]

Very good instructions thank you. I used your instructions for a Marlin Model 30AW. The only difference was that on my gun the roll pin lengths are the same.

[@Kanooky_Jones]

Excellent video, thank you.

[@brianblackwell2308]

Good lesson

[@anthonycesario6177]

Thank you.

[@jerryjohnsonii4181]

Thanks for the knowledge, Sir !!!!!!!!!!!

[@punkrocker915]

thanks bud. great video

[@glenncabot7994]

I have an 1895 marlin is it the same procedure , thank you, instructive and clear .

[@kaalalong8967]

Thx. Good work.

[@stevesimpson7442]

I’ve been having a problem with the last part of your video. The small piece with a flat edge pops out from the spring and ends up at an angle (like your showed). It should be tucked-in to the breech bolt, right? We don’t want it an angle, correct? Straight and tucked into the breech bolt. Am I correct with this?

[@Khethatipet]

Excellent video, thanks. I don't suppose these parts need maintenance? A spray of oil to keep them rust-free will suffice until a parts failure?

[@THESHOOTERSCHANNEL]

Khethatipet Thanks for the comment, and yes light oil...you can download the manual at Marlin’s website and it will give you the exact lubrication points

[@odiniskyvolk5167]

Do you have any suggestions on what may be the issue if the rifle is prone to light primer strikes? The bolt was disassembled and reassembled to factory standards, with no damaged components. I'm thinking that the leaf spring might need to be replaced. Thank you for the video.

[@easttexan2933]

Arthur, get a can of brake cleaner (go outside to do this) and after taking the bolt completely apart again, spray the cleaner down through the bolt body for a good cleaning inside. Let it dry or use compressed air to blow out the bolt body. No oiling the inside of the bolt but you can oil the firing pin ever so slightly. Reassemble, test fire. If problem persist, idk.

[@rjohnson5120]

The leaf spring is what pushes the rear firing pin down at an angle and out of alignment with the front pin. It’s part of the safety design. There’s another part, not shown in this video, that rises up when you close the lever. That part pushes the tilted rear pin upward into alignment with the front pin so the rifle will fire. The leaf spring is compressed when the rear pin is in alignment. Unless the leaf spring is in pieces, it shouldn’t affect primer strikes. Three easy things: make sure your hammer spring is full strength. If it’s been swapped for a lighter spring, go back to factory. Then no lubricant, dirt, rust, etc in the firing pin channel. Don’t put lubricant of any kind where it could get in there. The firing pins must move freely except for very light dragging of the rear pin against the leaf spring. Then try non-Remington ammo. Lots of reports of hard primers. Please don’t have any ammo around when working on the rifle. If any of this sounds confusing or unfamiliar, a gunsmith shouldn’t take more than 10 minutes to diagnose, and maybe 30 minutes to get it back into working order unless there’s something catastrophically wrong. But the chances of that are 1 in a million. Go with the easy stuff, because those are the most likely culprits. Cheap money compared to how long the rifle will last and function flawlessly with just basic cleaning. Good luck.

[@easttexan2933]

@@rjohnson5120 good call on using different ammo.

[@rjohnson5120]

@@easttexan2933 I’m having the same problem with an old 336 myself. Your brake cleaner and no lube suggestion is a good one. Didn’t mean to repeat you, you are right on. Lots of folks with this problem mention ammo. Only problem with that advice is there’s no ammo available to try! This is an excellent video by the way. I should have acknowledged that because it helped me. My front roll (actually solid in mine) pin was messed up and ancient and it wasn’t clear what I was looking at. Kroil and 10 minutes of careful hammering and it finally budged.

[@easttexan2933]

@@rjohnson5120 excellent

[@johnsagl6511]

Does the flat on the roll pin (slot) face the firing pin when reassembling

[@rogermorrill4700]

Didn’t say to clean inside of bolt, and clean firing pin, and leave it dry, oil in cold weather can slow pin travel and causing misfire.

[@THESHOOTERSCHANNEL]

Yeah, just a disassembly/assembly video. Thought about doing maintenance videos but everyone has their own way of doing things.

[@user-jn9km6qd7g]

I somehow can't get my rear pin out. I've beat the everloving crap out of it and it refuses to budge. Soaked in in every penetrating oil I have. Mine are the old school solid pins, not the roll pins.

[@futuremainiac6351]

I have an old 336. Check to see if it's actually a roll pin. Mine was a cotter pin, and if you punch at them from the split side they'll jam.

[@user-jn9km6qd7g]

@futuremainiac6351 Turns out I just needed someone else to hold the bolt steady on the bech surface while I really, really went at it with a carpenters hammer and punch. It took some serious pounding. It ended up bending my steel punch. I very lightly greased the pin when I reinstalled it to make sure something like that is less likely to happen again.

[@duanes3354]

Why does rear firing pin angle down?

[@nubianhex]

A small leaf spring presses it down. It is apparently a safety feature that prevents the firing pin from striking the primer when engaging the lever.

[@vanislandsteve]

👍🏻🇨🇦

[@The_Northerner]

Great video, thank you!

[@charleybrandon8602]

Excellent video great narration!

[@garyjones6859]

thank you