Brother b837 - Page 3

CONTENTS [Model 8837 · 8838]
DISASSEMBLY PROCEDURES
B837,B838
Page
...... 48
[I) Cover . . . . . . . . . . • . . • . • • . . . . . . . . . . . . . . . . . . . . . . 48
[!]Tension release lever . . . . . . . . . . . . . . . . . . . . . . . . . 49
[II Presser foot and walking bar . . . . . . . • . • . . . . . . . . 49
fl] Needle bar and needle thread take-up . . . . . . . . . 51
[I] Feed assembly . . .. . . . . . . • • .. . . .. .. . . .. . . . .. .. 51
(ASSEMBLY PROCEDURES) ........... 52
[I) Feed assembly . . . . . . . . .. . . . . . . • . . . . . . . . . . . . . . 52
[!]Needle bar . . . . . . . . . . • . . . . . . . . • . • . • . . • . . . . . • • 52
[II Walking bar and presser foot . . . • . . . . . . . . . . . . . 53
fl]Tension release lever ......................... 57
[!]Cover .•...•....•..•...•.•..•••.............. 58
STANDARD ADJUSTMENTS .. .. . . .. 59
B837,B838
[I) Needle and feed timing adjustment (standard) . . 59
[!]Feed dog adjustment m back and forth
directions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
60
[II Needle and rotary hook timmg adjustment . . . . . . 61
fl] Clearance between rotary hook and
needle plate . . • . • . . . . . • . . . . . . . . . . . . . . . . . . . . . . 62
11] Clearance between rotary hook and
bobbin .case opener . . . . . .
• . . . . . . . . . . . . . . . . . . . 62
[!] Presser foot height adjustment . • . . . . • • . . . . . . . . 63
II] Feed dog height adjustment . . . . . . . . . . . • . . . . . . 64
II] Vibrating presser foot and lifting presser foot
and
needle timing adjustment . . . . . . . . . • . . . . . . • 65
1IJ Upper feed adjustment .. . • • .. . . .. .. . .. . . . . .. . 65
[!ID Vibrating presser foot and lifting presser foot
vertical stroke adjustment . . . . . . . . . . . . . . . . . . . . . 66
GAUGE PARTS LIST FOR
DOUBLE NEEDLE LOCK STITCH
SEWING MACHINES _, ..... 67
(OTHERS)................................. 75
[I) Top cover thread guide .. • .. .. .. • .. .. .. .. . .. .. 75
[!]Adjusting upper thread length • . . . . . . . . . . . . . . . • 75
[II Anti-spinning spring .. . .. . .. .. .. • . . .. . . . .. . .. . 76
fl]8obbin ......................•......•........ 76
ITlTo thread bobbin cases (8835. 8836) ........• 76
(TROUBLESHOOTING GUIDE) ......... 77
From the library of: Superior Sewing Machine & Supply LLC