Slide Shaft Support Bracket Adjustment; Stop Lever Arm Spring Pressure Adjustment - Brother b831 Service Manual

4. Slide shaft support bracket adjustment
Set the stop lever to the dot on the position guide. Align the left end of slide block O with the left side of the needle bar
frame O.
Insertguidescrew O through the oval hole mslideshaft support bracketO- and screwthe set screwtightly intocollar
0
Tighten stop screw O.
Improper adjustment may damage the slide block tab and release pin end. resulting in damage to the release pin and
needle bar assembly
5. Stop lever aim spring pressure adjustment
Spring pressure control
collar position at stop
lever position R
Spring pressure control
collar position at stop
lever position L
★
Spring pressure is properly adjusted if the stop leverO stops at the center dot when the push lever O is released from
the L and R positions.
★
Screwthe collarO tightat the pointwhere the stop lever armspring 0 lightly touches thecollarO when the stop lever
0 is set to the L or R position.
Spring pressure should be equal at both positions L and R.
If the stop lever O will not stop at the dot. readjust the stop lever arm spring pressure.