Brother b837 - Needle breaks

L---[ _ Trouble _____, , .______ I _ ca _u se ____. I f.______ Che - ck ___JI , IL---- Rem -e dy ----'
Threads loose.
Needle breaks.
Thread take-up
sprrng too
weak.
Upper thread tens10n t oo
weak.
Lower thread tens1
on t oo
weak.
Needle guard
maladJuS ted.
Needle 1ncorrectly
Install-
ed.
Needle bent. needle
up
crushed.
Wrong needle and feed
t
iming .
Wrong needle and rotary
hoo k t 1mmg
Needle guard maladJuSted
Thread take-up
sprrng ten-
SIOn and movement
Upper thread tens1on.
Lower thread tens1
on .
Needle d1rect1on and
he1ght.
Needle.
See the section for thread
tens1on
See the sect1on for thread
t
ens1on.
See the section for thread
tension.
See the sect1on lor needle and
rotary hook
t1mmg adjustment
See the section for install-
ing the needl e.
Replace faulty needle.
See the section for needle
and feed timtng
adJust-
ment.
See the sect1on for needle and
rotary
hook t1m1ng adjustment
See
th e sect1on for needle and
rotary hook
t1mmg ad1ustmen1
From the library of: Superior Sewing Machine & Supply LLC