Singer 20U109 Instruction Manual And Parts List page 29

3.25
Knee Lifter
Installation
Caution
Switch off the
machine.
Set sewing head
upright again
using both hands.
Danger of crush-
ing between
sewing head and
table top.
Knee operating stitch width control
(Except 20U-309
(Figure 36)
Bell cranks '2' is fastened to the
underside of the bed, the bell crank
'2' is used for controlling the stitch
width with the knee.
To control the stitch width with the
knee, loosen screw '4' holding the
knee lifter shaft arm '3', and move
the knee lifter shaft arm just under
the bell crank'2' and firmly tighten
screw '4'.
Loosen the lock nut holding screw
'7' and turn screw '7' as required, so
that the bent end '6' of knee lifter
shaft arm '3' will be almost horizon-
tal when knee lifter knee plate '5' is
pushed as far as it will go in the
direction indicated with arrow 'A'.
Then firmly tighten the lock nut.
With knee lifter shaft arm '3' set in
position as described above, loosen
11
12
screw '8' and move knee lifter shaft
and 20E-910) arm '3' up or down as required, so
that height '10' from its bent end '6'
to bracket '9' is 67 mm.
Loosen stitch width regulating plate
thumb screws '11' and '12' so that
stitch width regulator '13' can be
moved from zero to maximum
stitch width. (20U-109 / 109C: 9mm
or 20U-112 / 112C: 12mm). Loosen
the lock nut holding screw '14' and
turn screw '14' as required, so that
knee lifter knee plate '5' when
pushed in the direction indicated
with arrow 'B', will stop at the maxi-
mum stitch width position of stitch
width regulator '13'. Then firmly
tighten the lock nut.
Stitch width will become wider
when knee lifter knee plate '5' is
pushed in the direction indicated
with arrow 'B' and will become
smaller
released.
13
10
67 mm
Figure 36
Zigzag Sewing Machine
when knee
2
1
14
7
8
9
B
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plate is
3
6
4
A
5
26