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Mainspring


Clockwatching247

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You need to remove the pin that I can see red circle, there might be another on the opposite side. Then push the whole thing out. You should see screws that you need to unscrew, the drum will come away which will leave you with the dial and movement.  You will need to remove the hands then you can remove the movement, some movements will be held by pins some are held in place by folded or twisted tabs. 

The spring by its looks doesn't have much power on it. With the movement free you should be able to see the click and its spring, put the key on and hold the key as if you are going to wind it and with a screwdriver move the click away from the ratchet and let the spring down. From what I see you have parts that are not in place these are the cup screw that holds the balance and it also holds the regulator which is on the movement.  

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Edited by oldhippy
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ive had one like this, 

you need to use a drift to tap the drum out, some are so tight its a joke, the 3 screws you have i believe are there to hold the movement onto the drum, you will be able to access them once the drum is removed. 

My advise would be to mark the drum and the case so you put it back in the same orientation as it cam out due to the tightness of removal

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Hi sometimes with these barrel/drum clocks the whole drum has to be removed and as transporter said they have to be drifted out carefully. After removing the fixing pin in the case side , mark the position of the drum and then use a wood drift to push out the drum. It could be corrosion between the wood and the brass liner/drum that’s holding it. When out you can gain access to the movement screws around the bezel and remove the drum sleeve from the clock, you will then see how to let down the main spring

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    • So leave off the seconds. Stand the movement on its edge, its the dial edge that rests on the pad ( either rubber or cork , something that wont slip ). Use a finger of your left hand to hold the movement upright,  right hand presses the release and flicks out the stem. I do it this way so i can see what I'm under a microscope. But you could hold the movement between two fingers of your left hand, its the right that has to manipulate the stem out by pushing the release and flicking out the stem with  right ring finger nail. Sounds more complicated than it actually is. I guess you could fix a push pin to something solid, then all you need to do is push the release against the pin, leaving your right hand completely free to pull the stem out.
    • Try putting everything back together and closing the back cover. I think one of the two springs has to contact the metal casing to ground the casing. So when you press the button, it will touch the contact on circuit board and close the circuit.
    • Yes, the seconds hand is the longest and goes almost to the edge of the dial. I can’t quite picture it how you do it on the rubber pad
    • A don't think so it leaked or damaged it because the watch itself works it just the buttons ain't working not connecting with the circuit board have taken more pictures of where the buttons makes contact with the circuit board.
    • I think what peter means oh is once he has fitted the hands and  checked for  alignment if them and that they dont foul, how does he then hold the movement to remove the stem in order to case up. The dial cannot be laid on a cushion or in a movement holder as the hands will get damaged. This can be quite tricky for a beginner, what i do is  to stand the movement on edge on a rubber pad so it doesn't slip. Hold the top edge with one finger then my dominant hand uses 3 fingers to press the stem release and flick out the stem. See below peter, leave off the second hand as this is the longest and gets caught the most, then fit it once the stem is out. Alternatively place the movement in one of the cup style holders, i imagine this is what they are designed for. They only touch the very edge of the dial.  
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