Installing Optional Parts; Presser Arm - Brother BM-917B Instruction Manual

13. REPLACING PARTS
13. REPLACING PARTS
Replacement of parts should only be carried out by a qualified technician.
Turn off the power switch and disconnect the power cord before installing any optional parts.
The machine may operate if the pedal is pressed by mistake, which could result in injury.
* The motor will keep turning even after the power is switched off as a result of the motor's inertia. Wait until the
motor stops fully before starting work.
When turning the machine pulley by hand, turn the pulley until the needle is at the final position after one cycle.
If the needle is at a point midway through the cycle when the power is turned on, the machine will immediately start
operating, which could result in injury.

13-1. Presser arm

23
CAUTION
<Removal>
1. Remove the needle.
2. Depress the pedal to lower the presser arm (1).
3. While pushing the spring guide (2) and the spring (3) up in
the direction of the bracket (4), pull them forward or to the
right to remove them.
4. Remove the snap (5) at the left side.
5. Loosen the two set screws (6), pull out the holder bar (7)
and then remove presser arm (1).
<Installation>
1. Align the holes in the presser arm (1) and the feed bracket
(8), and then pass the holder bar (7) through the holes.
2. Place the snap (5) into the groove in the holder bar (7), and
then tighten the two set screws (6).
3. Insert the spring (3) and the spring guide (2) into the
bracket (4), and then push them into the recess in the
presser arm (1).
4. While lifting the presser arm (1) by hand, turn the rotor (9)
2020M
in the direction of the arrow until it clicks.
The presser arm (1) will remain in the up position.
2021M
5. Loosen the bolt (12) and move the presser adjust plate
(13) until the distance between the top of the feed plate
(10) and the end of the button clamp (11) is 13-14 mm.
* If using the B913 or B915 type of presser arm, adjust
using the button holder hook (sold separately) instead
of the presser adjust plate.
6. Securely tighten the bolt (12).
7. Install the needle.
13-14mm
2075M
BM-917B, 917C
Button holder hook (Parts No. : S38181001)