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b831
Brother b831 Manuals
Manuals and User Guides for Brother b831. We have
2
Brother b831 manuals available for free PDF download: Service Manual
Brother b831 Service Manual (85 pages)
Brand:
Brother
| Category:
Sewing Machine
| Size: 9.86 MB
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
Thread Cutter Timing Adjustment
62
Needle and Feed 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
Presser Foot Height Adjustment
66
Feed Dog Height Adjustment
67
Vibrating Presser Foot and Lifting Presser Foot and Needle Timing Adjustment
68
Upper Feed 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
(7.9 MM) 151528-001
76
1/4" (6,4 MM) 151538-001
76
3/1 6" (4.8 MM) 151524-001
76
5/16" (7.9 MM) 151540-001
76
/4" (6.4 MM) 151544-001
77
Adjusting Upper Thread Length
78
Anti-Spinning Spring
78
Top Cover Thread Guide
78
Bobbin
79
Presser Foot
80
Troubleshooting Guide
80
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Brother b831 Service Manual (84 pages)
Brand:
Brother
| Category:
Sewing Machine
| Size: 7.29 MB
Table of Contents
Table of Contents
2
Names of Main Parts)
4
(Specifications)
6
(Mechanism)
8
Upper Shaft and Needle Bar Mechanism
8
Lower Shaft and Rotary Hook Mechanism
9
[!] Feed Mechanism
9
Thread Trimmer Mechanism
10
Tension Releaser Mechanism
10
[!!] Timmg Belt Replacement
10
Needle Bar (Left and Right) Mechanism Types 8835 and 8836
12
Top Feed Mechanism Types 8837 and 8838
13
Disassembly Procedures
14
Presser Mechanism
14
[]Cover
14
Rotary Hook, Lower Shaft and Thread Trimmer Mechanism
15
Reverse Mechanism
17
[!]Thread Wiper
15
[!]Needle Bar Rocking Shaft Mechanism
18
Assembly Procedures
19
Lower Shaft. Thread Trimmer and Rotary Hook Mechanism
19
[!] Presser Mechanism
24
[]Needle Bar Rocking Mechanism
19
[!]Thread Wiper
24
Reverse Switch Mechanism
26
[!]Reverse Mechanism
26
Standard Adjustments
28
B831,B832,B835,B836,B882
28
Lil Needle and Feed T1Mmg (8831)
28
(Models 8831. 8832. 8835. 8836. 8882)
32
Needle and Rotary Hook Timing Adjustment
32
II] Rotary Hook to Bobbin Case Opener Gap
34
Rotary Hook to Needle Plate Gap
34
Presser Foot Height Adjustment
35
Stitch Length Adjustment
38
Llij Slider Adjustment
42
[!!]Movable and Fixed Kn1Fe Adjustment
43
Ffi) Knife Drcving Lever Adjustment
45
Position Detector Adjustment
46
IE) Knife Mam Lever Roller
45
Ill) Corner Sewmg Pos1T10N Adjustment (8835. 8836)
46
Disassembly Procedures
51
Cover
51
Tension Release Lever
52
Feed Assembly
54
Fl] Needle Bar and Needle Thread Take-Up
54
(Assembly Procedures)
55
Feed Assembly
55
[!]Needle Bar
55
Walking Bar and Presser Foot
56
Fl]Tension Release Lever
60
Cover
61
Standard Adjustments
62
Needle and Feed Timing Adjustment (Standard)
62
[!]Feed Dog Adjustment M Back and Forth Directions
63
Clearance between Rotary Hook and Bobbin Case Opener
65
[!] Presser Foot Height Adjustment
66
Fl] Clearance between Rotary Hook and Needle Plate
65
II] Feed Dog Height Adjustment
67
And Needle Timing Adjustment
68
1IJ Upper Feed Adjustment
68
Gauge Parts List for B837,B838 Double Needle Lock Stitch Sewing Machines
70
(Others)
78
Top Cover Thread Guide
78
[!]Adjusting Upper Thread Length
78
Anti-Spinning Spring
79
Fl]8Obbin
79
Itlto Thread Bobbin Cases (8835. 8836)
79
(Troubleshooting Guide)
80
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