SunStar SC 7900-Series User Manual page 39

Loosen the presser foot clamp screw .
(Refer to the Figure 66)
Put to the highest point of the needle bar by rotating the hand
pulley.
Remove the presser adjusting screw
by using the presser bar pressure adjusting spring . (Refer
to the Figure 67)
Remove the thread holder crank
sleeve . (Refer to the Figure 68)
Remove the presser foot among the presser foot guide (left),
(right) by turning the presser foot to the left.
(Refer to the Figure 68)
Insert the replacement presser foot in the presser foot guide
(left), (right) by turning to the right. (Refer to the Figure 68)
Insert the thread holder crank
sleeve . (Refer to the Figure 68)
and lift the presser bar
from the hook drive
into the hook drive
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