Pfaff 3307-3 Series Instruction Manual page 117

Adjustment
● Detach bracket 4 (screws 5) together with the cam roller.
● Remove yoke head 6 and pull cylinder 7 off the bearing pin.
● Remove the 3 tube connections to the blind stitching unit.
● Remove the blind stitching unit (screws 8) by pulling it forwards.
● Reassemble in the reverse order.
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