4-24.Adjusting The Position Of The Lower Thread Presser (-02, -52 Specifications) - Brother RH-981A Service Manual

4. ADJUSTMENT
4-24. Adjusting the position of the lower thread presser (-02, -52 specifications)
The lower thread presser (1) should be adjusted so that it can securely clamp the lower thread.
3826Q
3828Q
1. Loosen the screw (2), and move the lower thread presser (1) up and down so that its top surface is flush with the
groove in the throat plate.
2. Make sure that the lower thread presser (1) does not fill the front groove of the throat plate.
If it does, loosen the nut (3), and adjust the screw (4).
Note: Set the height from the stopper portion of thread trimmer lever bracket B (5) to the top of the looper base,
to 11 mm at maximum.
3. Make sure that the front of the throat plate overlaps with the lower thread presser (1) by 0.5 – 1.0 mm when
thread trimmer lever bracket B (5) operates.
4. If adjustment is necessary, remove the lower thread presser bracket (6), loosen the nut (7), and adjust the screw
(8).
75
Lap amount
RH-981A
3827Q
3829Q