Adjusting The Upper Thread Loosening Amount - Brother RH-9820 Service Manual

7. ADJUSTMENTS

7-31. Adjusting the upper thread loosening amount

0754B
1. With the plunger (2) of the upper thread tension release solenoid (1) pushed all the way in, loosen the nut (5) and turn the bolt
(3) to adjust so that the clearance between the end of the bolt (3) and the solenoid setting plate (4) is 13.8 mm.
2. With the upper thread tension release solenoid (1) installed to the upper cover (6), check that the opening amount for the
tension discs (7) is 0.5 - 1 mm when the plunger (2) is pushed all the way in.
* Section (A) should be sealed at this time.
183 RH-9820