Pfaff 438 Series

10
Setting:
10.1
Adjustment:
10.1.1
.2
.4
.5
Zeroing the bottom feed
When the stitch iength is set at "0" the feed dog must not move fonward when the
baiance wheei is turned.
Adjustment with closed gearcase.
((t
1/
10.0.1
Loosen clamp screw 4 of actuating crank 5.
Place a 27-mm wrench on hexagon torsion nut 6 and thus hoid actuating shaft 7 firmlyin
position.
Keep rotating the balance wheel and turn the wrench on the torsion nut until the
feed dog stops moving forward.
Hold the wrench in this position and, making sure the actuating crank 5 and circlip 8 are
against the casting, tighten clamp screw 4.
Check this adjustment (see "Setting").
18
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com