Speedmaster pusher

Donn Chambers

I’m no expert, but I think you have to uncase the movement in order to replace the pushers. If I’m wrong, I’m sure I’ll be corrected.

pascs

You need a special tool to replace the part that is screwed into the case. However, you dont necessarily need to replace that part at this stage. The pusher cap is held in with a long screw which goes through the middle of the pusher (the part screwed into the case).
The screw will still be inside the case, so in theory you just need to replace the pusher cap, but of course things are not always that simple and some pushers seem to have slightly different teeth etc. Ideally you would want to buy a complete new pusher but you could just buy a used one or the cap

To replace either part of the pusher you need to open the case and take out the movement. Although not difficult, the potential for disaster is high. So unless you are experienced in watch repairs, then i would not attempt it yourself.
Once the movement is removed, then its just a case of screwing a new/old pusher cap on, or replacing the complete pusher if the person doing the work has the necessary tool - I think the spline tool is about £50

Dan S

As noted, you may be able to replace just the cap by removing the movement and screwing it onto the pusher screw that you can see inside the tube, assuming it's not damaged. The end of the screw inside the case usually has a slot for a small screwdriver. In the future, when you see the pusher cap backing off so that the knurled end of the tube is visible, remove the movement and tighten the screw before you lose the cap. It's usually obvious to see when it is becoming loose.