Pfaff 937

Adjustment
● Loosen nut 2 and increase the pressure on the presser foot a little with screw 1.
● Allow the presser foot to rest on the needle plate.
● Loosen screw 4, move the eccentricity of bolt 3 towards the needle bar and tighten
screw 4.
● Turn the balance wheel until lever 5 is at its rear point of reversal.
● Loosen screw 6 and press lever 5 to the rear.
● Slide a gauge conforming with the requirement between the vibrating presser foot and
the needle plate and tighten screw 6.
● Loosen screw 8 and turn eccentric pin 7 for the final adjustment.
● Tighten nut 2 and screw 8.
11.05.33 Vibrating presser stroke
Requirement
With the stitch length set at “0“, the presser foot resting on the needle plate and the
vibrating presser foot at its upper point of reversal, there must one of the following
clearances between the needle plate and the vibrating presser foot, depending on the
model of the vibrating presser foot.
Subclass -706/81: 1.3 mm on pulling-type vibrating pressers.
2.0 mm on pushing-type vibrating pressers behind.
Subclass -706/83: 1.3 mm on pulling-type vibrating pressers.
• 3.2 mm on pushing-type vibrating pressers.
11 - 37
Fig. 11 - 36
1
2
1
7
4
3
8
5
6