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Here is a guide how to reset your sa4130 keyless, this movement is found in the Noob Daytona with full working chronograph. An amazing movement which is very close to the Rolex 4130.
There are two parts to this guide, If you're confident with working with your hands on small parts you can try the first part before we remove the hands. If you have never touched a movement before, i would not recommend you try the second part, save yourself the headache and send your movement to someone who knows what they're doing.
So starting with a cased up movement
Use a caseback tool (die no.5 29.50) to remove the back
Now you have the case back off you can remove the 3 small screws for the rotor (screwdriver size 110), remove the rotor and place the parts in a container so they're covered and safe. Turn the clamp screw (screwdriver size 160) in the green circle a few times, the screw doesn't need to come all the way out, the clamps can turn 90 degrees so they're free from the case. Or you can just take them out completely.
Once the clamps are tucked away or removed you're ready to remove your crown and stem. The stem should be removed in the winding position! Press down very gently in the area marked with a red circle, use some fine tweezers, peg wood or even a cocktail stick. If you press to hard you risk bending the spring for the setting lever. So, lightly pressing the button with one hand, turn the crown and pull out gently with the other.
(You will notice i have removed the auto work from my movement and can see the ratchet wheel, you don't need to do this).
If you're not resolving an issue with the keyless place the movement on a cushion or in a movement holder and insert the stem, you shouldn't need to press the button down, push it in slowly giving it a few turns.
If the stem wont go back in and you have a problem with the keyless we can try to reset it without removing the hands and dial, sometimes this works sometimes it doesn't.
There is a good chance the stem won't go back in because the Yoke for the sliding pinion (4130 240) has moved on top of the Sliding pinion (4130 205), i have simulated this in the picture below. You can see the Yoke with the red arrow pointing at it is not seated correctly in the sliding pinion with the green arrow pointing at it.
We need to get it seated correctly like this
Before we remove the dial and hands, we can try and push a screwdriver very gently between the gap of the dial and keyless to try and push the yoke back into position. Insert a small screwdriver around the area where the red arrow is (obviously you will have a dial and hands on your movement and the stem will not be inserted)
If it works you're done and you can reverse what we did and case the movement up. If not the next step is to remove the dial and hands and take a better look at what is going on. Whilst you are not working on your movement make sure you don't leave it exposed, always cover it up.
To remove the hands, place a small plastic bag, you can cut a section out of a zip lock bag or similar. This will protect the dial and hands by making sure the levers do not come into contact with either
Use some hand levers to lift the hands
loosen the screws on the side of the movement at 10 and 5 so you can remove the dial (i have removed the screws because i am servicing this movement).
So, now you will be able to see if the yoke is in the incorrect position or not. If it is gently push it onto the winding pinion.
I will go through how to rebuild the Keyless in the next part
EDIT: Onto dismantling the keyless and rebuilding
Parts list from top to bottom
1. Setting lever jumper 4130-231
2. Sprinng for yoke 4130-241
3. Yoke for sliding pinion 4130-240
4. Setting lever 4130-220
5. Winding Pinion 4130-204
6. Sliding pinion 4130-205
7. Setting wheel core 4130-249
8. Setting wheel 4130-250
9. Spring for setting lever 4130-250
The first step is to remove the Setting lever jumper, which acts as a cover plate for the rest of the parts. Loosen the two screws a few turns and then with a small screwdriver lift up the lever so it becomes free from the setting lever. Remove the screws and keep them covered.
The only tricky part is coming next, removing the Yoke spring. If you mess this up the spring will be launched into orbit and you'll have to ask Nasa to retrieve it
This spring is under quite a lot of tension and not so easy for beginners to remove. it . You will need some pegwood or Rodico to cover one end
Then with a pair of strong tweezers grip the spring tightly and pull it out. I would also recommend a beginner places the movement inside a clear plastic bag to limit how far the spring can travel, if you haven't got a good grip of it. Replacement rep parts are very rare and gen parts are very expensive.
Taking the rest apart is straight forward, so we'll move onto rebuilding step by step. Just make sure you keep the setting lever spring screw separate from the setting lever jumper screws as they are different.
Rebuild
Place the winding and sliding pinions as shown, note the orientation of the sliding pinion.
Next place the stem through the winding and sliding pinions and into the movement
Place the setting wheel core on its post, be sure to get the correct orientation as per the picture
Place the setting wheel on top
Next is the set lever, the small notch has to sit in the hacking lever hole circled in red.
Seat the yoke on its post and on the sliding pinion. The set lever spring can also be installed.
The yoke spring is next, as per the removal i get it almost in position and hold it with some pegwood. Instead of using tweezers like we did to remove it i get another piece of pegwood with a nice flat end and just press it in, so 2 pieces one to hold it in place and 1 to press it in. Again, do this in a clear bag if you're not 100% confident.
line up the setting lever jumper with its screw holes, tighten the screws a couple of turns and then make sure the lever is in the correct position before tightening the screws fully.
Check the function by pulling the stem in and out, give it a few cautious turns whilst you check everything is aligned correctly.
If you removed the hour wheel and washer replace them now.
Replace the dial and tighten the screws for the dial feet. Place in a movement holder ready to press the hands
Replace the hands, remember to check the clearance between the hour hand and sub dial. Also hour, minute and centre chrono hand are all clear and parallel.
Now you need to place the movement upside down in a movement holder and remove the stem, remember winding position. I use bergeon 4040-p as it will not scratch the dial.
Under magnification check the dial for and dust, particles, fluff etc. Check no dust has made its way onto the inside of the crystal.
Place the case over the movement and turn it over
Insert the stem. You shouldn't have to press the button but you can lightly if needed.
Before screwing the crown down, put your case clamps back in. Check the dial is aligned properly.
When attaching your rotor, give the stem a few turns to make sure everything is engaged.
Replace the case back.
There are two parts to this guide, If you're confident with working with your hands on small parts you can try the first part before we remove the hands. If you have never touched a movement before, i would not recommend you try the second part, save yourself the headache and send your movement to someone who knows what they're doing.
So starting with a cased up movement
Use a caseback tool (die no.5 29.50) to remove the back
Now you have the case back off you can remove the 3 small screws for the rotor (screwdriver size 110), remove the rotor and place the parts in a container so they're covered and safe. Turn the clamp screw (screwdriver size 160) in the green circle a few times, the screw doesn't need to come all the way out, the clamps can turn 90 degrees so they're free from the case. Or you can just take them out completely.
Once the clamps are tucked away or removed you're ready to remove your crown and stem. The stem should be removed in the winding position! Press down very gently in the area marked with a red circle, use some fine tweezers, peg wood or even a cocktail stick. If you press to hard you risk bending the spring for the setting lever. So, lightly pressing the button with one hand, turn the crown and pull out gently with the other.
(You will notice i have removed the auto work from my movement and can see the ratchet wheel, you don't need to do this).
If you're not resolving an issue with the keyless place the movement on a cushion or in a movement holder and insert the stem, you shouldn't need to press the button down, push it in slowly giving it a few turns.
If the stem wont go back in and you have a problem with the keyless we can try to reset it without removing the hands and dial, sometimes this works sometimes it doesn't.
There is a good chance the stem won't go back in because the Yoke for the sliding pinion (4130 240) has moved on top of the Sliding pinion (4130 205), i have simulated this in the picture below. You can see the Yoke with the red arrow pointing at it is not seated correctly in the sliding pinion with the green arrow pointing at it.
We need to get it seated correctly like this
Before we remove the dial and hands, we can try and push a screwdriver very gently between the gap of the dial and keyless to try and push the yoke back into position. Insert a small screwdriver around the area where the red arrow is (obviously you will have a dial and hands on your movement and the stem will not be inserted)
If it works you're done and you can reverse what we did and case the movement up. If not the next step is to remove the dial and hands and take a better look at what is going on. Whilst you are not working on your movement make sure you don't leave it exposed, always cover it up.
To remove the hands, place a small plastic bag, you can cut a section out of a zip lock bag or similar. This will protect the dial and hands by making sure the levers do not come into contact with either
Use some hand levers to lift the hands
loosen the screws on the side of the movement at 10 and 5 so you can remove the dial (i have removed the screws because i am servicing this movement).
So, now you will be able to see if the yoke is in the incorrect position or not. If it is gently push it onto the winding pinion.
I will go through how to rebuild the Keyless in the next part
EDIT: Onto dismantling the keyless and rebuilding
Parts list from top to bottom
1. Setting lever jumper 4130-231
2. Sprinng for yoke 4130-241
3. Yoke for sliding pinion 4130-240
4. Setting lever 4130-220
5. Winding Pinion 4130-204
6. Sliding pinion 4130-205
7. Setting wheel core 4130-249
8. Setting wheel 4130-250
9. Spring for setting lever 4130-250
The first step is to remove the Setting lever jumper, which acts as a cover plate for the rest of the parts. Loosen the two screws a few turns and then with a small screwdriver lift up the lever so it becomes free from the setting lever. Remove the screws and keep them covered.
The only tricky part is coming next, removing the Yoke spring. If you mess this up the spring will be launched into orbit and you'll have to ask Nasa to retrieve it
This spring is under quite a lot of tension and not so easy for beginners to remove. it . You will need some pegwood or Rodico to cover one end
Then with a pair of strong tweezers grip the spring tightly and pull it out. I would also recommend a beginner places the movement inside a clear plastic bag to limit how far the spring can travel, if you haven't got a good grip of it. Replacement rep parts are very rare and gen parts are very expensive.
Taking the rest apart is straight forward, so we'll move onto rebuilding step by step. Just make sure you keep the setting lever spring screw separate from the setting lever jumper screws as they are different.
Rebuild
Place the winding and sliding pinions as shown, note the orientation of the sliding pinion.
Next place the stem through the winding and sliding pinions and into the movement
Place the setting wheel core on its post, be sure to get the correct orientation as per the picture
Place the setting wheel on top
Next is the set lever, the small notch has to sit in the hacking lever hole circled in red.
Seat the yoke on its post and on the sliding pinion. The set lever spring can also be installed.
The yoke spring is next, as per the removal i get it almost in position and hold it with some pegwood. Instead of using tweezers like we did to remove it i get another piece of pegwood with a nice flat end and just press it in, so 2 pieces one to hold it in place and 1 to press it in. Again, do this in a clear bag if you're not 100% confident.
line up the setting lever jumper with its screw holes, tighten the screws a couple of turns and then make sure the lever is in the correct position before tightening the screws fully.
Check the function by pulling the stem in and out, give it a few cautious turns whilst you check everything is aligned correctly.
If you removed the hour wheel and washer replace them now.
Replace the dial and tighten the screws for the dial feet. Place in a movement holder ready to press the hands
Replace the hands, remember to check the clearance between the hour hand and sub dial. Also hour, minute and centre chrono hand are all clear and parallel.
Now you need to place the movement upside down in a movement holder and remove the stem, remember winding position. I use bergeon 4040-p as it will not scratch the dial.
Under magnification check the dial for and dust, particles, fluff etc. Check no dust has made its way onto the inside of the crystal.
Place the case over the movement and turn it over
Insert the stem. You shouldn't have to press the button but you can lightly if needed.
Before screwing the crown down, put your case clamps back in. Check the dial is aligned properly.
When attaching your rotor, give the stem a few turns to make sure everything is engaged.
Replace the case back.
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