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    Singer sewing machine repair vertical shaft gear R&R - YouTube

    How do you remove gears from a Singer sewing machine?
    Turn these screws counterclockwise to release the shaft at the end. Loosen the screws along the shaft on the gears inside the sewing machine with either the screwdriver or an Allen wrench, depending upon the model. Some Singer machines have four gears and some have five.
    ehow.com
    Singer Sewing Machine Model 457 Top Gear Replac…

    Remove the needle, needle plate and bobbin from the machine. It can be easier later on if the bobbin case is also removed, but this is not essential. It is released by lifting the black coloured bracket about ¼" (6mm) and then sliding it to the right. Next take off the needlebar cover at the left of the machine and the plastic cover on the top arm ...

    singersewinginfo.co.uk

    Rotate the vertical gear so that it’s retaining setscrew is in line with the access aperture. If the gear teeth are broken then turning the balance wheel may not also turn the vertical gear as it is should. In that case turn the toothed belt pulley at the other end of the gear shaft underneath the machine. Once the gear setscrew is in line with the...

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    Reassembly needs to be carried out in 2 stages so that the hook can be re-timed in between them. Replace the small filler panel at the bottom of the access aperture and then refit the plate to the controls area. This is just a reversal of the dismantling procedure. Underneath the machine, refit the toothed timing belt and the tensioner device so th...

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    Whenever the timing belt has been removed it is necessary to retime the machine so that the hook is in the correct relationship to the needle. Before starting, make sure that on zigzag machines the needle is set to the central straight stitching position. Double check this by inserting a needle and temporarily replacing the stitch plate and lowerin...

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    All that is left now is to put the machine back together. Refit the bottom cover onto the machine, the needle plate,the needlebar cover and finally the plastic cover onto the top arm. Thread up and sew test the machine.

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