SOURCE: threading a pfaff 9020 sewing
all machines thread the same. TTN tension, take up,
needle.
Beginning with the spool, guide the
thread through the thread guides to the tension assembly. Pull the thread
through the tension assembly and test it to make sure the tension is working
correctly.
(To do this test, adjust your tension setting to normal or medium or 5 or
something in the middle. Raise the presser foot and pull the thread through the
tension. It should pull easily!! Lower the presser foot and pull the thread. It
should pull noticeably harder.) If it passes this test, continue up through the
take up lever,then down through the thread guides to the needle. Make sure your
needle is fully inserted and turned the correct way.( If you load your bobbin
case from the left side,the needle rule is normally FLAT to the RIGHT is RIGHT.
There are some exceptions. If you have a newer style drop in bobbin or your
bobbin case loads in the front then the rule is FLAT to the BACK.
Sewman7
SOURCE: timing my pfaff 332 sewing machine
There are two parts to the sew hook on that machine. The outer part has the hook point that grabs the thread off the needle. Then there is an inner part which has a post in the center of it that the bobbin case fits on to. The inner part should be held in place with an arm that has a bump on it. It keeps the inner part from spinning around. Sometimes this arm slips loose and a notch in the inner part of the hook assembly slips out from under the knob on the arm. If this is what is happening, you need to loosen the screw holding the arm in place and reposition the notch of the inner part of the hook back under the bump on the arm. There needs to be clearance between the notch and the bump for the thread to pass between the two. And the bump should be in line with the needle when it is in its lowest position.
If this doesn't solve the problem you need to take the machine in for repair.
Wayne
SOURCE: Anna had this problem with her Pfaff 332 sewing machine, I do too
I believe that the bobbin case holder has become unlatched, for lack of better terminology. I have one of these machines, and my first experience with one was exactly as you are describing. A friends grandmother brought it to me because it kept breaking needles and wouldn't complete a stitch.Put the bed table in the lowered position, leaving the free arm exposed. Remove your needle, presser foot, and bobbin case, leaving the bobbin door open. Next remove the two screws that hold in the feed plate, and remove the feed plate. Looking down into the bobbin area, manually turn the bobbin case holder. There is a small slot in the top of the bobbin case holder, look for it as you turn. A small latch protruding from the bed plate is supposed to be clipped into that slot, and if the latch is still there, you likely will not be able to rotate the holder into place: This is good news, it means nothing is broken. Loosen the three screws (two silver on the top of the bed plate and one black in the area where the feed plate goes) which hold the bed plate in place, but do not remove them. You should be able to lift the bed enough to get the holder into place, and then set the bed back down and tighten the screws. Reassemble everything, throw in a new needle and see how it goes!
SOURCE: pfaff hobby 301 manual how to thread my sewing
Here is a manual you can download - http://gotoes.org/sales/PfaffSewingMachineManuals/ViewInfo.pl?Pfaff=1&Sewing_Machine_Model=HOBBY-301-420-INSTRUCTIONS
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