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HOW-TO: Fix Broken Nikon DSLR Lens Mounts.


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Old 11-06-2009, 08:28 AM   29 links from elsewhere to this Post. Click to view. #1
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...............¯\_(ツ)_/¯

Might as well add this to this site as well:


If you have a Nikon DSLR camera, you most likey have one or both of these lenses.


The 18-55 and 55-200 Nikon lenses have plastic mounts. Where the lens mounts to the camera body, the 3 tabs are plastic, and it's common for them to break if too much stress is placed upon it, it gets pushed around too much while in a camera bag, or if some dingbat drops the camera (as in my case).

In these photos you can see where the 3 plastic tabs have broken off:





So with the 3 plastic tabs broken off the mounting part of the lens, the lens will not stay on the camera. The lens is still fully functional, it just will not stay on, unless you are firmly holding it in place.




Most camera "experts" say repairing them cost more than they are worth, which is not true, (I was told $65 for parts and labor at a well known Los Angeles camera shop, they have done it a lot and a new 18-55 VR lens is about $170 or about $90 for a Nikon reconditioned one, the 55-200's are even more). But really this is a simple do-it-yourself repair, and the part is very cheap (Nikon sells it for $9.45).

I went over to Nikon and got the part:



It is called the"bayonet mount unit" (the part # for the 18-55 VR lens can be seen on the box in the photo above).


The part is available directly from Nikon:

Nikon Parts Department
7AM - 3PM (Pacific)
Monday - Friday

841 Apollo Street, Suite 100
El Segundo, CA 90245-4721

1-310-414-8107



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Old 11-06-2009, 08:29 AM   #2
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...............¯\_(ツ)_/¯

Now here's a "How-To" on replacing the part:

(First off, I wanna say that I was not planning on doing a write-up on this, I was just taking photos of the fix for my own use, like in case I forgot what part went where, I could just look back at the photos. So these are not the greatest photos as I was just using an old P&S camera that I had with me at the time.)

You will need the new mounting unit and a tiny screw driver. There will be a total of 9 tiny screws to remove/put back on on the lens and 1 on the new mounting unit to remove.



1- Look at the new part, so you know what you will be taking off the lens.












2- Remove the following piece, one screw holds it in place:







Now on to the lens:

3- There are 2 parts that are attached to the mounting unit. In the following photo, they are are numbered 1 and 2 in RED.



The YELLOW numbers are where the screws are. Numbers 1-3 hold the mounting unit to the lens body, 4 and 5 part #2 and 6-8 hold part #1 to the mounting unit.

Close up shot of the screws that attach the 2 parts to the mounting unit:





Remove all the screws.






4- Lift off part #1 only:








5- Let part #2 tilt inward, it is attached to the lens body:








6- Look at the following photo:



The mounting unit is still connect to the lens by the part circled in yellow. So you will need to carefully lift it up just enough so the long tab part (look at the new unit) comes out and you can flip it over like in the photo.

Also, as the RED ARROWS point out, remember how those metal rings are placed, there are a total of 4 that sit on each other. They are loose now.






7- Just like you did on the new unit, remove that screw:



Now the old mounting unit is free from the lens.






8- Screw that piece to the new mounting unit:









9- Flip the new mounting unit on (RED ARROWS), then flip up part #2 back into place (YELLOW ARROWS). Make sure the 4 metal rings are back in the proper position first.









10 - Screw the mounting unit to the lens body (3 screws), and screw that part to the mounting unit (2 screws).












11- Place the last part back on and screw it on:



Finish.

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Old 11-07-2009, 11:49 PM   #3
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Good stuff.

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Old 11-08-2009, 02:50 AM   #4
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Thanks, bro.

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Old 02-04-2010, 03:31 PM   #5
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I did the repair as mentioned and everything was great. I called nikon Canada and they sent me the part. I think it was 14.00 cdn and 15.00 shipping. Very easy to do and a big thank u goes out to the poster. The repair at a local repair shop would have cost the same as buying a new lens figure that one out. The bayonet conecter in my opion is really cheap quality.

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Old 02-05-2010, 08:49 AM   #6
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Totally cool. My sister and myself both have those lenses, so this could come in handy soon.

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Old 02-06-2010, 12:35 PM   #7
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Quote:
Originally Posted by tony8512 View Post
I did the repair as mentioned and everything was great. I called nikon Canada and they sent me the part. I think it was 14.00 cdn and 15.00 shipping. Very easy to do and a big thank u goes out to the poster. The repair at a local repair shop would have cost the same as buying a new lens figure that one out. The bayonet conecter in my opion is really cheap quality.
Yeah, the bayonet is pretty low quality material, but when I was getting the part from the guy at Nikon, he said it's better that this piece breaks instead of the glass breaking. Which is kinda true, I rather have that part take the brunt of the force (from dropping the camera) instead of the glass or camera itself.

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Old 03-14-2011, 07:59 PM   #8
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First and foremost thank you for this great thread!! :]

Is there any I can self reconnect the GND lead wire to the yellow metal window piece? It got disconnected in the process of disassembly :'[

Also do you advise that I buy a new rear cover ring? a very small piece on the side seems to have chipped off. Also there are 2 tiny nail that are attached to it, but I could only managed to get one of it out. The unscrew nail that is still attached is quite mutilated from my stubborn attempts. I don't know what to do with that mutilated unscrew nail.

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Old 03-14-2011, 08:58 PM   #9
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Originally Posted by smileforme View Post
First and foremost thank you for this great thread!! :]

Is there any I can self reconnect the GND lead wire to the yellow metal window piece? It got disconnected in the process of disassembly :'[

Also do you advise that I buy a new rear cover ring? a very small piece on the side seems to have chipped off. Also there are 2 tiny nail that are attached to it, but I could only managed to get one of it out. The unscrew nail that is still attached is quite mutilated from my stubborn attempts. I don't know what to do with that mutilated unscrew nail.
It looks like it can be just soldered on.

I'd get a new piece.

And for the stripped screw, you probably have to just keep trying different mini screw drivers till at slight angles you can get lock and turn it, or possibly, an eyeglass repair place can remove it (since they are used to these sssssize screws).

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Old 03-15-2011, 09:25 AM   #10
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This thread sure does get a lot of attention.

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Old 10-09-2011, 05:04 PM   #11
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A big thanKyou to the poster for this. Nikon will only repair my lens if I give them $160. This lesson in practical economy is gratefully received. BPB

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Old 04-10-2012, 09:20 AM   #12
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I used this tutorial and I was able to repair my lens. I got just the outer ring from usacamera.com for $11 plus shipping. Thanks a ton!!!

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Old 05-26-2012, 02:35 PM   #13
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Used these instructions to repair my Nikon 18-55mm lens; however, there were some issues to discuss:
1. Called Nikon as specified and ordered the repair kit. What I ended up finding out was that the little metal strip and ring that sticks down into the lens was not the same one that was in the original lens. When installing, make sure the two pieces are identical. I will be calling back Nikon to let them know that part #1C999-601-2 is not the same. To resolve the issue, I took the metal ring and strip from the broken lens mount and used it in the new ring mount since it was the plastic ring that was broken. When we used the part we got from Nikon, the ring would not rotate to the full 18mm view; it only went from 55mm to about 35mm. With the new ring and old metal peice, it worked fine.
2. Alignment of the pieces is critical to reassembly.
3. I ended up taking the lens to my watch repair guy since he has the small tools to remove screws that I did not. He charged me $26.50 to do the job, but it took him a couple tries to get it right.

Hope this helps those of you who try this self repair. in the end, it was cheaper than buying a new lens.

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Old 07-13-2012, 04:35 AM   #14
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I have just registered specifically to thank the OP for this incredibly useful money saving guide. My wife dropped my (open) camera bag and the lens mount plastic broke, she was devastated thinking she'd destroyed my genuine Nikkor 18 - 105mm lens, however with this guide and the outer ring replacement (£3.30 on Amazon UK Marketplace) I was able to repair my lens within 5 minutes.

As the outer ring didn't come with the inner sliding plastic part (with the long arm) I had to work out how that disassembled (unscrew 2 screws and rotate) and remount the spring onto the new outer ring, but it was a doddle and I'm indebted to you for this excellent guide.

I can't see myself ever using this site again (the UK isn't typically a GM Truck kinda place), but I genuinely wanted to say thank you Steve.

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Old 07-14-2012, 09:29 PM   #15
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I just bought a D5100 and have both of those lenses. I'm going to print this and keep it for future reference...thanks.

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Old 09-07-2012, 08:55 PM   #16
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I found the part on eBay for $6.90 including shipping from Hong Kong. Other than big fat shaky fingers and breaking the wire all went well. A quick solder job and I'm back in business.

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Old 04-15-2013, 12:02 PM   #17
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I broke the small wire in picture #7

What is it? What does it do? What is it called?

I put the lens back together without the wire and it seems to work ok.
I'd like to put the wire back together too, just for completeness sake.

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Old 04-15-2013, 12:10 PM   #18
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Quote:
Originally Posted by malo2000 View Post
I broke the small wire in picture #7

What is it? What does it do? What is it called?

I put the lens back together without the wire and it seems to work ok.
I'd like to put the wire back together too, just for completeness sake.
Does it still zoom the complete range

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Old 06-22-2013, 11:55 PM   #19
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just replaced broken bayonet on VR 18-105 on a D7000. unfortunately the small wire attached to the bayonet detached from the metal post attachment. Auto focus does not seem to work now - can anyone confirm if this is the reason why? Am I screwed? thanks.

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Old 06-23-2013, 12:13 AM   #20
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Originally Posted by jbuffam View Post
just replaced broken bayonet on VR 18-105 on a D7000. unfortunately the small wire attached to the bayonet detached from the metal post attachment. Auto focus does not seem to work now - can anyone confirm if this is the reason why? Am I screwed? thanks.
I believe that did it. Not positive, but it could probably be soldiered back

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Old 01-28-2014, 03:58 PM   #21
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Thank you Steve and other contributors! Here from Google search. Saved me a ton and now I can go take pictures of the snow instead of waiting for a repair

To anyone who went with an aftermarket mount (I don't believe Nikon sells the full mount anymore, just folks on eBay reselling it $25ish), some help:

- Ordered "NEEWER" Bayonet Mount Ring from Amazon Prime ($9) and arrived next day. The earth wire screw hole was just a little too small on new part, and I had to force feed a screw into it (while disassembled) to get the screw hole large enough - before placing the mount back with earth wire and screwing - but the part works fine and everything else fits.

- Between steps 7 & 8: The above part didn't come with an aperture control (the part with the long metal rod and two screws) so I had to pull the control and spring off the broken mount's and place on the new mount and put spring back on (I also first removed the two screws the hold the aperture lever onto the control ring - this is not necessary but didn't hurt, just put it back on and re-screwed).

- I took quick iPhone pics of what stuff looked liked on all sides before disassembling each part, which really helped me remember what went where, and how, if it wasn't visible in the guide photos.

- Be extremely gentle at step 6, else the earth wire will pull loose easily. Do not let the mount dangle - you must support it underneath (extra hands help) and put absolutely no pressure on the wire as you unscrew it. This is surgery, right?

- The metal stacked rings underneath the mount (red arrows step 6) will shift around and become misaligned easily as you pull the lens apart. Easy solution is use a small piece of tape to secure rings to the lens in one spot while working, or just hand thread a screw back in through one hole so they don't shift as you work.

- I also laid the broken mount on table and placed the screws around the mount where I took them off, to make sure they went back in the right holes (3 diff size screws on my lens - and the holes ALL look the same once they're out).

- When reassembling at step 9, I slid the long aperture control rod back into the lens in wrong. It should be on the very left side of the entry hole (mine seemed to slide easily into the right side, so I didn't realize it was incorrect). You will know this because:
(1) When you reassemble and look through the viewfinder of the reassembled camera, the lens view is very dark.

(2) It will be a bit difficult to mount the lens back to the camera (thought it was the aftermarket part being wonky) and lens will not zoom in/out all the way.

(3) Most easy to check (found this last) - when you finish step 11, the metal part (aperture lever) sticking out on the bottom right will not move. If it's installed correctly, it will easily slide back and forth.
Hope this helps anyone in the same boat. I am dexterous but knew absolutely nothing about the inner-workings of a lens, or how to repair this - but start to finish with this guide and a couple YouTube videos (here and here), I had everything fixed within 45 minutes. G'luck!

Jess

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Old 03-29-2014, 10:25 PM   #22
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Quote:
Originally Posted by Steve View Post
I believe that did it. Not positive, but it could probably be soldiered back
I had the same problem. Auto focus didn't work, and the camera shoots without even trying to autofocus. Did you find a way to fix it?

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Old 03-29-2014, 11:22 PM   #23
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...............¯\_(ツ)_/¯

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Originally Posted by AdhamAbozaeid View Post
I had the same problem. Auto focus didn't work, and the camera shoots without even trying to autofocus. Did you find a way to fix it?
I didn't run into that problem (small wire attached to the bayonet detached from the metal post attachment) when I did this. And I haven't had to do any more repairs like this since.

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Old 03-30-2014, 03:24 AM   #24
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Quote:
Originally Posted by AdhamAbozaeid View Post
I had the same problem. Auto focus didn't work, and the camera shoots without even trying to autofocus. Did you find a way to fix it?
Update

It's working at last!!
First, I thought i was an idiot and did it all wrong and missed up the AF motor of the connector.
But then, i though i should try and put the broken original mount back on the lens, and even didn't connect the cable at step 8 at all, and it worked straight away! I compared both mounts for any shift in the plastic that is causing the metal contacts to get shifted, but found none obvious.

I also googled for ppl who have their AF stuck, and came across this
D7000 AF doesn't work after switching lenses: Nikon DX SLR (D40-D90, D3000-D7100) Talk Forum: Digital Photography Review
" after putting the new lens on (after it clicks into place), turn the lens back in the opposite direction (as though you were going to take it off...but don't push the lens release button, just turn the lens)."
i put the new mount back on the lens, and tried that, and it worked also.

My guess is that my new Neewer mount
Amazon.com: Neewer® 2x Bayonet Mount Ring for Nikon 18-15 18-105 55-200mm Lens: Camera & Photo
is off by a single mm that causes the whole lens to shift, and the metal contact to disconnect from the body!

I'm still reporting this back to Neewer and Amazon. Did anybody find another supplier for these mounts? Nikon stopped selling the genuine one :/

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