This isn't as easy as it seems.First you need to remove the outer covers,all screws are visible & should be removed.Lever the stitch selector dial away from the machine being careful not to loose the retaining plate.You will need to apply some force to remove the front cover,easing the catch just above the needle upwards while pulling the cover forwards.Once the covers are removed remove the bobbin winder,might be a good idea to take a photo just as a reminder of how the return spring is positioned.Check the bobbin winder works before reinstating the covers.Good luck !!
Sewman
May 2011