33 BAS-761
10-4. Removal of the fixed knife and the movable knifeNote:
Turn off the power switch.
■ Removal of the fixed knife
1. Remove flat-head screws q and then needle plate RR w and needle plate RL e.
2. Remove clamping screws r and then tilt the machine head.
NOTE:
At this time, adjust the position of the machine head so that it is aligned with the notch in the bellows rail.
3. Remove clamping bolt t and then bobbin case holder position bracket y.
4. Remove flat-head screw u and then fixed knife i.
¡When the fixed knife i becomes blunt, sharpen it as illustrated at right.
■ Removal of the movable knife
wy
q
r
1. Remove flat-head screws q and then needle plate RR w.
2. Remove clamping screw e and then presser foot assembly r.
3. Turn the pulley and stop the needle bar at its highest position.
4. Remove screw t and then needle y.
5. Push thread trimming rod t in the arrowed direction and stop where flat-head screws y can be seen.
6. Remove flat-head screws y and then movable knife u.
Note:
To reassemble, reverse the above procedures.
e
u
10. Adjustments
t
t
y
i
r
u
r
e
qw
Belows rail
Notch
t
y