This process will demonstrate how to remove the internal assembly and tighten the metal shaft on a Sonicare FlexCare toothbrush.

To complete this, you will need 5-10 minutes and the following:
Standard flat head screwdriver
#0 Phillips screw driver
A little common sense

Step 1: Disassembly

Remove brush head
Using a standard flathead screwdriver
Gently twist the bottom plug until it releases
Gently remove the plug

Please note the tabs holding the plug in place are soft plastic and look like they will easily break.

Holding the body, push down on the metal shaft. Because of the seal it will take a little effort so I used side of the handle on my screw driver to break the seal and push it down.
Pull the internal assembly out

Hi, followed your instructions, tightened the screw. powers on, but no vibration. Any other suggestions?
It is possible that maybe there is something else that is broken? For me it was just a loose screw. <br> <br>If you locate the problem, please post a reply. <br> <br>Good luck!
<p>I had this problem on mine. It ended up being that the coils had slipped forward and come in contact with the metal base that makes the head vibrate. Basically, there needs to be a small air gap between the end of the electromagnetic coils and the shiny metal peice just in front of them. If they make contact, the vibration is greatly reduced. There are two slotted screw holes on the assembly at the base of the coils. One of them is under the circuit board, so you will need to remove the entire assembly to get to the other screw. Loosen them up and pull the coils all the way back, and i used a piece of thin plastic between the coils and the metal piece to maintain the gap when I pushed the coils back up. Tighten the screws and remove the plastic, and reassemble. </p>
<p>Thank you. I had this same problem on two sonicare brushes. Perhaps this is a common problem.. </p>
<p>Thanks. This seems to be the problem with mine. Making the electromagnet-mechanical gap bigger helped it.</p><p>If anyone is interested, I measured the voltage at the coils during operation to be about a 260Hz, 10Vp-p, modified sine wave with the pulse widths being 1.5ms on high, 1ma on medium, and 0.5ms on low.</p>
<p>I had the same problem. Battery power is fine but when you turn it on, you hear a slight vibration. I took it all apart and found that the metal piece that goes between the electromagnet and the top rotating shaft had sheared off. (see picture) It is permanently busted. You cant order these parts. It might be possible to get a &quot;parts only&quot; broken one off e-bay and cannibalize it.</p>
<p>Also, I found it easier to get the bottom off by wrapping it in a paper towel and squeezing channel-lock pliers at the widest part of the oval near the bottom. After that I used a thin screwdriver to pry out the bottom assembly.</p>
Twist the bottom plug in which direction?
<p>I twisted the plug about 1/4&quot; CCW, but I don't think it matters which direction. You just need to turn it far enough so the black tabs in the 2nd pic on the first step (near the bottom end) twist out of the slots in the shell. The other method of squeezing the oval of the body so the sides bulge out away from these tabs works well too. The tabs are easy to see in the step 3 battery picture too-- they are lined up with at the left end of the battery at the green band and fit into little slots inside the sides of the shell.</p>
I don't recall, but generally it is righty tighty lefty loosey (counter clockwise).
<p>It would be helpful to mention that the bottom plug detaches from the main body and the hole which appears to take a flat screwdriver blade in fact does nothing and there is no need to rotate the plug. I just ended up destroying the plastic a little for nothing. </p><p>Don't worry about the plug, it's just a plug not attached to anything really. You want to remove the inner assembly and THAT is what has two little plastic tabs that fit into recesses in the outer body shell that surrounds it.</p><p>To get the body out, as another poster said, it easiest just to use channel lock type pliers and squeeze the outer shell/body at it widest point about 3/4&quot; (2cm) from the bottom.</p><p>In doing this you widen the body where the tabs sit in their recesses and you can just push firmly on the metal tip of the device and it should fall right out. If it doesn't come right out, perhaps remove the bottom plug first with a small flat screw driver by prying between it and the body, trying to pull it straight down. </p><p>Some overseas folks are selling internals for these brush bodies on eBay. Might be worth looking at if you have physical breakage.</p>
<p>I basically took it very carefully and got the end cap off by prying with screwdriver, plus holding the end with a pair of channel locks. Once I got the cap off, I pulled out the entire mechanism and discovered that the screw holding the metal tip was loose. I simply tightened the screw and put it all back together. It works liked a charm now.</p>
<p>The screw in my toothbrush doesn't seem to be loose. However my metal shaft has detached from the main body of the toothbrush and the rubber seal around it has broken. Any ideas what to do or where replacement parts could be obtained?</p>
<p>I got it out (use a very broad tip screwdriver!) and tightened it up, but then when putting it back in, the toothbrush turned on for a bit, then turned off and now will not turn back on again....did i short something out somewhere? I put the core on the basestation and it charges, but can't get the thing to turn back on again... Any suggestions?</p>
<div> Thanks for your ideas! I had the same problem but in my case there is a part broken: So too late...</div>
<p>Yup, same with me. Dropped mine accidently and the part of aluminium-cast seems to be broken. Anybody has an idea where to get these as replacements?</p>
Bummer. Pretty sure our friends at Phillips does not consider this a serviceable item.<br><br>If you have all of the pieces you could try a 2 part epoxy or something like that? If that doesn't work then it is probably time for a new unit.
<p>Hi Dave, right, Philips just wrote me... &quot;please send it to one of our repair-shop for exchange&quot;... at a cost naturally. I really hate this mentality of non maintainable products.It's awful.</p><p>Epoxy will not work IMO because of the mechanical stress this part is suffering.</p>
<p>Very helpful tip and good instructions. Worked like a charm. And then I fixed it again 2 days later, and today the screw came out again. I would like to know if there is a way to get a replacement screw -- or possibly the threads are loose where it is going. Has there been success with locking washers or any other fixes to hold these pieces together? Tx. </p>
<p> The repair worked perfectly , worked for a while then stopped again I took it apart again , put red lock tight on the threads of the screw and will try again ..I would however wright a small disclaimer telling people to be very carful unscrewing the end cap for the 1/4 turn , cause if you break the plastic locks you'll have a problem getting it back together !</p>
Thanks, you saved me from a bunch of inconveniences during an already hectic time of year; greatly appreciate you posting this. My husband fixed it within 3 minutes for me (tightened a couple of screws). I also realized that a new brush head also was needed.
Thanks. You just saved me from having to buy a replacement for an otherwise fully functional brush. Unfortunately I was impatient and made a mess of the soft plastic base so I'll need to find something to seal it to make it waterproof again.
It lasted another year and a half before I had to tighten it again. This time I had a little trouble getting the inner component out but I turned it upside down and pushed the top down on to the top of a table and it came out easily.
Thanks! Worked for me. Great instructions.

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