Brother LH4-B800E Service Manual download pdf (Page 22)

LH4-B800E

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1. MECHANISM DESCRIPTION

3. Then, when the feed mechanism moves forward, the cam w that is secured to the feed arm q moves in the

direction of the arrow (forward) and moves the back plate e in the direction of the arrow (forward).

4. When the back plate e and the stop plate r lock together and clamp the upper thread trimmer lever t and the

stop plate r separates from the back stopper y, the upper thread trimmer lever t is pulled in the direction of the

arrow by the spring u, and the upper thread trimmer assembly i changes from the condition in Figure A to the

one in Figure B and the upper thread trimmer opens fully.

Figure A

Figure B

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Brother LH4-B800E Service Manual Page 22