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Brother Manuals
Sewing Machine
b831
Service manual
Table Of Contents - Brother b831 Service Manual
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Service manual
(84 pages)
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Table Of Contents
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
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Table of Contents
Contents
2
Table Of Contents
3
Product View
4
Technical Data
4
Motor Pulley Data
7
Motor Pulley Change
7
Upper Shaft And Needle Bar Mechanism
8
Needle Feed Mechanism
8
Lower Shaft And Rotary Hook Mechanism
9
Feed Mechanism
9
Thread Trimmer Mechanism
10
Tension Releaser Mechanism
10
Reverse Mechanism
11
Thread Wiper
11
Needle Bar
12
Top Feed Mechanism
13
Disassembly Procedures
14
Assembly Procedures
19
Q] Needle And Feed Timing Adjustment (Standard)
28
Thread Cutter Timing
29
Lower Belt Wheel Position
30
Adjustment Of Needle Bar To Presser Bar Gap
31
Needle And Rotary Hook Timing Adjustment
32
Needle To Rotary Hook Point Gap
32
Needle Bar Rise And Height
32
Rotary Hook To Needle Plate Gap
34
Rotary Hook To Bobbin Case Opener Gap
34
Presser Foot Height Adjustment
35
Feed Dog Height Adjustment
36
Tension Release Adjustment
37
Stitch Length Adjustment
38
Reverse Feed Solenoid Adjustment
39
Reverse Switch Adjustment
39
Thread Wiper Adjustment
40
Slider Adjustment
42
Bobbin Thread Clamp Spring
42
Movable And Fixed Knife Adjustment
43
Installing The Movable And Fixed Knives
44
Knife Main Lever Roller
45
Knife Driving Lever Adjustment
45
Position Detector Adjustment
46
Corner Sewing Position Adjustment
46
Push Lever Position Adjustment
47
Slide Shaft Adjustment
47
Slide Shaft Support Bracket Adjustment
48
Stop Lever Arm Spring Pressure Adjustment
48
Needle Bar Stop Adjustment
49
Presser Foot Height
49
Timing Belt Replacement
50
Disassembly
51
Assembly
55
Needle And Feed Timing Adjustment
62
Thread Cutter Timing Adjustment
62
Feed Dog Adjustment In Back And Forth Directions
63
Excessive Presser Bar Walking Presser Bar Gap
63
Clearance Between Needle And Rotary Hook
64
Clearance Between Rotary Hook And Bobbin Case Opener
65
Upper Feed Adjustment
68
Vibrating Presser Foot And Lifting Presser Foot And Needle Timing Adjustment
68
Vibrating Presser Foot/Lifting Presser Foot Vertical Stroke Adjustment
69
Gauge Parts List For Double Needle Lock Stitch Sewing Machines
70
Gauge Parts List
75
3/1 6" (4.8 Mm) 151524-001
76
(7.9 Mm) 151528-001
76
1/4" (6,4 Mm) 151538-001
76
5/16" (7.9 Mm) 151540-001
76
/4" (6.4 Mm) 151544-001
77
Top Cover Thread Guide
78
Adjusting Upper Thread Length
78
Anti-Spinning Spring
78
Bobbin
79
Troubleshooting Guide
80
Presser Foot
80
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Q] Needle and Feed Timing Adjustment...
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This manual is also suitable for:
B835
B832
B836
B837
B838
B882
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