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1. MECHANISM DESCRIPTION
i
11. When feed guide shaft B q that is secured to the feed arm support moves forward after sewing starts, the roller r
that is secured to the opening plate w by means of the roller shaft e moves over feed guide shaft B q and the
opening plate w rotates centering on the shoulder screw t.
12. The opening plate w presses against the collar u that is installed to the lower thread clamp y and the lower
thread clamp y rotates centering on the shoulder screw i, so that the clamped lower thread is released by the
lower thread presser o and the lower thread clamp y.
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o
y
u
LH4-B800E
t
q
r
e
w
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Table of Contents
Troubleshooting
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Brother LH4-B800E Instruction Manual
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