Adjusting The Knee Lever Motion - Pfaff 481 Service Manual

20

Adjusting the knee lever motion

Requirement
When the knee lever is pushed by the full amount of its travel, there must be a clearance
as indicated in the table below between presser foot and needle plate and the presser bar
lifter should drop by its own weight.
Version A and subclass -731/..:
Versions B and C:
7/9 mm
● Turn stop screw 1 (nut 2) out a few turns.
● Raise the presser bar lifter.
● Place the 7-mm-thick or the 9-mm-thick blade of the gauge under the presser foot and
lower the presser bar lifter.
● Push the knee lever until a noticeable resistance is felt; the presser foot must not yet lift
off the gauge. First turn in stop screw 1 (nut 2) fully, then back out by half a turn.
7 mm
9 mm
1
2
25