Contents - Brother b831 Service Manual

CONTENTS [Model B831 6832 8835 6836 8882]
( NAMES OF MAIN PARTS ) i
(specifications) 3
( MECHANISM ) 6
CD Upper shaft and needle bar mechanism 5
(U Needle feed mechanism 5
d] Lower shaft and rotary hook mechanism 6
[U Feed mechanism 6
d] Thread trimmer mechanism 7
d] Tension releaser mechanism 7
dl Reverse mechanism 8
d] Thread wiper 8
[9] Needle bar (left and right) mechanism types
B835 and B836 9
(13 Top feed mechanism types 8837 and B838 10
rDISASSEMBLY PROCEDURES ^ 11
\B831. B832, B835, B836. B882y
d] Cover 11
(U Presser mechanism 11
|T| Thread wiper 12
d] Rotary hook, lower shaft and
thread trimmer mechanism 12
d] Reverse mechanism 14
d] Needle bar rocking shaft mechanism 15
d] Reverse switch mechanism 15
(assembly procedures) 16
[T|Needle bar rocking mechanism 16
[T] Lower shaft, thread trimmer and
rotary hook mechanism 16
(H Presser mechanism 21
(T|Thread wiper 21
d] Reverse switch mechanism 23
d] Reverse mechanism 23
d] Cover 24
/STANDARD ADJUSTMENTS A 25
VB831, 8832, 8835, 8836, B882y
d] Needle and feed timing (B831) 25
d] Adjustment of needle bar to presser bar gap
(Models 8831, 8832, 8835, 8836. 8882) 28
d] Needle and rotary hook timing adjustment 29
d] Rotary hook to needle plate gap 31
d] Rotary hook to bobbin case opener gap 31
d] Presser foot height adjustment 32
d] Feed dog height adjustment 33
d] Tension release adjustment 34
d] Stitch length adjustment 35
(13 Reverse feed solenoid adjustment 36
[n]Thread wiper adjustment 37
ini Slider adjustment 39
[13 Movable and fixed knife adjustment 40
03 Knife mam lever roller 42
HE Knife driving lever adjustment 42
(13 Position detector adjustment 43
03 Corner sewing position adjustment
(8835, 8836) 43
03 Timing belt replacement 47