Brother b831 - Contents

CONTENTS [Model B831 6832 8835 6836 8882]
( NAMES OF MAIN PARTS ) i
(specifications) 3
( MECHANISM ) 6
CD Upper shaft and needle bar mechanism 5
(UNeedle feed mechanism 5
d]
Lower shaft and rotary hook mechanism 6
[UFeed 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
(UPresser 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
(HPresser 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 barto presser bargap
(Models 8831, 8832, 8835, 8836. 8882) 28
d] Needle and rotary hook timing adjustment 29
d] Rotary hookto needle plate gap 31
d] Rotary hookto 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
iniSlider adjustment 39
[13 Movable and fixed knife adjustment 40
03 Knife mam lever roller 42
HE Knife driving lever adjustment 42
(13 Positiondetector adjustment 43
03Corner sewing position adjustment
(8835, 8836) 43
03 Timing belt replacement 47