Type 99 Bolt Assembly

[Patrick Chadwick]

a completely unrelated thread

You can run, but you can't hide (cue evil cackle)

[jmoore]

You can run, but you can't hide (cue evil cackle)

No, I go looking for trouble...


Tkaxman, I keep wondering about that cover. Once again you have something new! Maybe we can sort that as well, but I'm thinking the next time you try an install, it'll mysteriously work!

Chitlins. Yallerdog. Footfeet.

[Milsurp Collector]

The bolt is a cock-on-opening type, so if (like me) you store the bolt outside the rifle - to save space in the gun cabinet - the spring will be permanently compressed, and eventually weaken.

Constant compression does not weaken springs, that is a common misconception.
Magazine spring madness: | American Handgunner | Find Articles at BNET

Cyclic loading is what weakens springs, not static compression. Compressing and relaxing the spring (by cocking and decocking) will wear a spring out faster than leaving it compressed (cocked).

[stache]

I put my type 99 7.7 in storage about 30 years ago and I took the bolt out then.
Now I have pulled it out of storage and I can not seem to get the bolt back in. It locks up at the point where the bolt handle meets the top and should go down but it will not go down.
I have read this thread and my bolt appears to be correct according to the pictures. I took the stop off for now to see if that would help but it didn't. I do have to pull the trigger to get the bolt in the last little bit.
Hope the pictures show up. I am new to this.
Is there a sequence that needs to be followed?

[jmoore]

stache, judging by the shadow in the RH photo, it appears that you are not exerting forward force on the bolt handle. In which case, the action isn't cocked. And it SHOULD be by the time the bolt has moved that far forward.

In guessing you pulled the trigger whilst inserting the bolt, allowing the striker to move forward, in an attempt to decock it. Due to the trigger interlock working properly, the bolt should NOT rotate down!

Remove the bolt from the rifle. Put the bolt stop back on, open the floorplate to get the magazine follower out of the way. Then re-insert the bolt and ensure that the striker and sear engage, cocking the action whilst you press the bolt handle forward. If there's tension from the firing pin spring resisting the forward motion of the bolt- good!- continue the press forward and rotate the handle down. If it works fine (NO trigger pulling during the bolt closing operation!), then everything's as it should be.

If not, let us know. I have a few ideas.

[stache]

It so easy when you know how to do it. Guess I tried to make it hard. Thanks.

[m4a3sherman]

I have to agree with many of the posts on here about how do you do it! And, it's that there are 6 pages of this! haha. To be fair, I sought for so long to find a way to let my firing pin down without 'dry-firing' it but eventually gave up. Sht_le can do it somehow through brute force and persuasion. I simply prefer to dry-fire it and be done with it. It won't hurt it, sounds sort of neat and it takes less than a second to do. Still, it is stuff like this that keeps me coming back to this forum- Now, if I ever DO come across someone who has managed to jam an Arisaka, I will know several remedies for it.

[luxordeathbed]

Probably thread necromancy, but had to post this. Thank you all for posting here and for this information. I just undid the same mistake here that someone's father did to their rifle 10 years ago. Google searched found this, studied, and had it fixed in 20 minutes. Thank you.

[jmoore]

Probably thread necromancy, but had to post this. Thank you all for posting here and for this information. I just undid the same mistake here that someone's father did to their rifle 10 years ago. Google searched found this, studied, and had it fixed in 20 minutes. Thank you.

If it helped you then that's super! Renewing an old but useful thread is a good thing, I think. Our site is pretty good about it.

Welcome to the forums! And thanks for the feedback.

[romeoburbs]

I have a Type 99 Last Ditch series 40 Jinsen. I am having a devil of a time trying to get the safety to operate properly. When I push it in and try to give it a 1/8 turn right it goes just a little way and then cams back out. The serial # matches so it probably never worked. I trimmed back the forward edge of the cap to bring it farther forward and it didn't help. Any sulggestions? Thanks in advance for any help.
Gene