Brother B830 Series Manuals

Table of Contents

• 2

  Table of Contents
• 4

  Names of Main Parts)
• 6

  (Specifications)
• 8

  (Mechanism)
• 8

  Upper Shaft and Needle Bar Mechanism
• 9

  Lower Shaft and Rotary Hook Mechanism
• 9

  [!] Feed Mechanism
• 10

  Thread Trimmer Mechanism
• 10

  Tension Releaser Mechanism
• 10

  [!!] Timmg Belt Replacement
• 12

  Needle Bar (Left and Right) Mechanism Types 8835 and 8836
• 13

  Top Feed Mechanism Types 8837 and 8838
• 14

  Disassembly Procedures
• 14

  []Cover
• 14

  Presser Mechanism
• 15

  [!]Thread Wiper
• 15

  Rotary Hook, Lower Shaft and Thread Trimmer Mechanism
• 17

  Reverse Mechanism
• 18

  [!]Needle Bar Rocking Shaft Mechanism
• 19

  Assembly Procedures
• 19

  []Needle Bar Rocking Mechanism
• 19

  Lower Shaft. Thread Trimmer and Rotary Hook Mechanism
• 24

  [!] Presser Mechanism
• 24

  [!]Thread Wiper
• 26

  Reverse Switch Mechanism
• 26

  [!]Reverse Mechanism
• 28

  Standard Adjustments
• 28

  B831,B832,B835,B836,B882
• 28

  Lil Needle and Feed T1Mmg (8831)
• 32

  (Models 8831. 8832. 8835. 8836. 8882)
• 32

  Needle and Rotary Hook Timing Adjustment
• 34

  Rotary Hook to Needle Plate Gap
• 34

  II] Rotary Hook to Bobbin Case Opener Gap
• 35

  Presser Foot Height Adjustment
• 38

  Stitch Length Adjustment
• 42

  Llij Slider Adjustment
• 43

  [!!]Movable and Fixed Kn1Fe Adjustment
• 45

  IE) Knife Mam Lever Roller
• 45

  Ffi) Knife Drcving Lever Adjustment
• 46

  Position Detector Adjustment
• 46

  Ill) Corner Sewmg Pos1T10N Adjustment (8835. 8836)
• 51

  Disassembly Procedures
• 51

  Cover
• 52

  Tension Release Lever
• 54

  Fl] Needle Bar and Needle Thread Take-Up
• 54

  Feed Assembly
• 55

  (Assembly Procedures)
• 55

  Feed Assembly
• 55

  [!]Needle Bar
• 56

  Walking Bar and Presser Foot
• 60

  Fl]Tension Release Lever
• 61

  Cover
• 62

  Standard Adjustments
• 62

  Needle and Feed Timing Adjustment (Standard)
• 63

  [!]Feed Dog Adjustment M Back and Forth Directions
• 65

  Fl] Clearance Between Rotary Hook and Needle Plate
• 65

  Clearance Between Rotary Hook and Bobbin Case Opener
• 66

  [!] Presser Foot Height Adjustment
• 67

  II] Feed Dog Height Adjustment
• 68

  And Needle Timing Adjustment
• 68

  1IJ Upper Feed Adjustment
• 70

  Gauge Parts List for B837,B838 Double Needle Lock Stitch Sewing Machines
• 78

  (Others)
• 78

  Top Cover Thread Guide
• 78

  [!]Adjusting Upper Thread Length
• 79

  Anti-Spinning Spring
• 79

  Fl]8Obbin
• 79

  Itlto Thread Bobbin Cases (8835. 8836)
• 80

  (Troubleshooting Guide)