Rolex DateJust Waterproof Pusher Crown Repair

Learning how to repair waterproof crowns, or pusher crowns it not difficult.  This process can take a few moments.  However, as you will see, the repair process on this watch was easy, but normally waterproof crowns get so worn out, they often need to be changed.

Pusher crowns on watches are nothing new.  They have been put onto some of the best watches for many years.  Pusher crowns offer the owner a way for the crown to fit onto the watch, and then get Screwed down to the watch case.  They offer water resistance, or water proofing as many like to say, and are a mechanical wonder when you think about how simple they are, but what they do to protect the watch inside.

Now and then, these crows can become damaged.  Normally, before they fall apart, over the course of years, they will get worn down to the point that they no longer function.  If one comes apart in pieces, then it was probably abused, or not made well.

In this case, the customer tightened the crown down so hard, that when he unscrewed the crown, he actually unscrewed the internal crown parts.  

Watch the How to here...

How do pusher crowns work?

Pusher crowns are made up of four parts, not including the gaskets.

The first part, is the crown head.  On this watch, a Rolex, we can see that the crown head is made of 18k yellow gold, and has the Rolex Logo embossed on it.

The second part of the pusher crown is the piece that the stem screws onto.  This piece would look like any other crown post if we examined them all.

The third part, the part being the one that allows the crown to move in and out, is the crown tube, and either screwed to the crown, welded to the crown, or pressure fit to the crown.  

The fourth part, is a tiny little spring.  This spring sits inside the crown tube, and pushes between the crown top, and the crown post that screws onto the stem.  

Together, when assembled, this allows about 3mm to 7mm worth of springy push to the crown.  When extended out, the tube and the post are keyed in a way, like a hex nut.  When the crown is extended out, the keying system locks the stem to the crown so that you can set and wind the watch.

When the crown is pushed in, and screwed down to the case, it can turn freely, not engaging the stem, like a slip clutch, and be allowed to tighten onto the case to make the watch water resistant.

How long do they last?

When we speak about wear and tear of watch parts, especially crowns, we tend to think that most watches have crowns which will last the lifetime of the watch.

It is true however, that some people are much harder on watches than most of us think, and watches being banged, dropped or abused, will tend to have either the crowns or crystals damaged more often than other parts.

Pusher crowns tend to wear out over the course of many years.  My experience tells me that a well taken care of watch may last 50 years, and equally, so will the crown.

If you are the type of watch owner that constantly adjusts the time and date of your watch, then you are putting more wear and tear on the crown and the associated parts to that crown.  The more use it gets, the quicker it will break.

Rolex crowns, like the one in this video however, usually last twenty years more or less. This watch is a beautifully taken care of watch, and the reason for the crown coming apart in this case, was due to the customer over-tightening the crown onto the watch case.

Most of the time, the crown will either just fall apart, or will wear out to the point that when you unscrew the crown from the case, and pull out the stem to set the time, you then realize that the keyed system to the stem parts are worn beyond repair, and must be replaced.

This watch was easy!

Even I love an easy repair.  No, maybe I can’t make much money from this, but boy can I do this quickly and save the customer a lot of money for the repair, because he believed he was going to need a new crown.

Luckily, this crown screws together. Because the spring was lost, we had to replace that, and then screw it back together in the correct way.  I also apply a little drop of lock-tight or something similar onto the threads of the crown post so that it is less likely to come apart again in the future.

The springs used in this crown are not easy to find, and you will most likely, like me, have to go to either a watch supply company to get them, or order a generic pusher crown and take it apart for its pieces.  To be honest, if you do that, then all you want to save is the spring.

The repair would have been much more complicated had the crown need pressure fitting.  I have a video on that, and I’ll put a link here for you to see that process.

This repair went well, and I’ve sent it back to the customer.  He is very happy, and because of that, sent me two additional watches for me to look at.

 

Thanks for coming to the website, and I hope you found this information helpfult.

One thought on “Rolex DateJust Waterproof Pusher Crown Repair

  • August 2, 2020 at 9:17 am
    Permalink

    Hi, I am trying to find contact info for you. I believe I am in need of a crown tube replacement for my Rolex Datejust and wonder if you are willing to do the repair? I notice you are in SW FL. I am in the Panhandle in a little town called Niceville, which is outside the east gate of Eglin AFB. Thank you!

    Reply

Leave a Reply

Your email address will not be published. Required fields are marked *