How do I open the housing of a Pfaff 7550 to clean the thread tension mechanism?
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It is possible to do this on your own and it can be a bit difficult to do it. This mechanism is made to adjust the thread tension by turning the knob on the front. if you take this apart and can not get it back together correctly you will need to buy a new one. There should be some instruction in the book or I would recommend that you take this to a sewing machine shop to have it done.
Looks like you need the manual: www.pfaff.com/
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