Replacing The Fixed Knife And Movable Knife - Brother S-7220C Instruction Manual

7. REPLACING THE FIXED KNIFE AND MOVABLE KNIFE

Replacement of parts should only be carried out by
a qualified technician.
Turn off the power switch and disconnect the power
cord from the wall outlet before replacing any parts,
otherwise the machine may operate if the treadle is
pressed by mistake, which could result in injury.
Secure the table so that it will not move when tilting
back the machine head. If the table moves, it may
crush your feet or cause other injuries.
7. REPLACING THE FIXED KNIFE AND MOVABLE KNIFE
CAUTION
Use both hands to hold the machine head when
tilting it back or returning it to its original position.
If only one hand is used, the weight of the machine
head may cause your hand to slip, and your hand
may get caught.
When replacing
accessories, be sure to use only genuine Brother
parts.
Brother will not be held responsible for any accidents
or problems resulting from the use of non-genuine
parts.
<Fixed knife>
1. Tilt back the machine head.
2. Remove the screw (1), and then remove the hook stopper
(2).
3. Remove the screw (3), and then remove the fixed knife
(4).
NOTE:
Carry out the above steps in reverse to install the fixed
knife (4).
Sharpening the fixed knife
If the cutting performance deteriorates, sharpen the fixed
knife (4) on a whetstone (5) as shown in the illustration.
0569D
<Movable knife>
0778B
1. Remove the needle.
2. Lift up the presser foot using the lifting lever.
3. Remove the two screws (1), and then remove the needle
plate (2).
4. Turn the machine pulley to raise the needle bar to its
highest position.
5. Tilt back the machine head.
6. Push the thread trimmer lever (3) by hand in the direction
of the arrow until the two screws (4) can be seen.
7. Remove the two screws (4), and then remove the
movable knife (5).
NOTE:
Carry out the above steps in reverse to install the
movable knife (5).
0570D
S-7220C
parts and installing optional
0777B
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