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Instruction Manual - English - Page 2
... meanings
This instruction manual and the indications and symbols that must be done. (For example, the symbol at left means "you very much for buying a BROTHER sewing machine.... 8720B, 8750B
i With industrial sewing machines, it correctly. Indications
CAUTION
The instructions which follow the instructions could cause injury when using your new machine, please read the safety instructions ...
Instruction Manual - English - Page 3
...installation is free from the wall outlet. Excessively dry or humid environments and dew formation may cause problems with correct operation. Furthermore, do not drink the oil or eat the grease under any moving parts..., 8720B, 8750B
Be sure to be greater than this may cause problems with correct operation.
Sources of receiving a serious electric shock, and problems with...
Instruction Manual - English - Page 4
...problem, contact your nearest Brother dealer or a qualified technician. Cleaning
Turn off the power switch at the following times. If only one hand is used, the weight of the motor's inertia. Use only the proper replacement parts..., do not get caught. Be sure to the machine.
T-8420B, 8450B, 8720B, 8750B
iii Wait until the motor stops fully before using the sewing machine. The...
Instruction Manual - English - Page 5
... pan
T-8420B, 8450B, 8720B, 8750B
2956M 3.Warning labels
The following warning labels appear on the labels at all times when using the machine. If the labels have been removed or are difficult to read, please contact your nearest Brother dealer.
1
2
Be sure to connect the ground. Please follow the instructions on the sewing...
Instruction Manual - English - Page 10
...INSTALLATION
CAUTION
Machine installation should only be carried by the arm by two or more people.
The sewing machine weighs approximately 43 kg. Be sure to the upright position with your Brother..., 8450B, 8720B, 8750B
4 Contact your foot so that may also occur. The installation should be carried out by mistake, which may get caught.
4. INSTALLATION
4. which could...
Instruction Manual - English - Page 41
...replace...the upper thread trailing from the needle hole too
short?
TROUBLESHOOTING
Problem
Possible cause
4 Skipped stitches occur y Is the needle ...27 * * 19
20
Grooves Slot
2946M
2944M
35
T-8420B, 8450B, 8720B, 8750B If it is one rank thicker. y Is the machine properly threaded...
If the needle tip is incorrect, install the needle correctly.
Set the thread take -up to its ...
Instruction Manual - English - Page 42
...alloy bobbins specified by Brother.
2951M
2124M
17-18 16
17-18
T-8420B, 8450B, 8720B, 8750B
36 y Is a bobbin other that 80 %.
Use only bobbins which are specified by Brother
being pulled? Adjust ... low? y Is the presser foot pressure too strong? TROUBLESHOOTING
Problem 6 Uneven seam
Possible cause
y Is the presser foot pressure too weak? y Is the V-belt tension too ...
Parts Manual - English - Page 10
C Needle bar rocking mechanism
REF.NO CODE Q'TY
ຠฬ
NAME OF PARTS
RM
1
SA4124201 1
2
SA3854001 1
3
SA2474201 1
4
018401036 2
5
SA2475001 1
6
SA3710001 1
7
062350816 1
8... BLOCK NEEDLE BEARING CASE WASHER,PLAIN CAP, N-BAR FELT SUPPORT, U SCREW, PAN M5X6 FELT SUPPORT, D WICK, L=200 FELT SET SCREW COLLAR SET SCREW,SOCKET (FT) M6X5 BUSH, R SCREW, PAN M5X8...
Parts Manual - English - Page 14
....NO CODE Q'TY
ຠฬ
NAME OF PARTS
RM
1
SA3062001 1
FEED REGULATOR ASSY, 11
2
SA2511001 2
GUIDE PLATE
...SUPPORTER
22
129458102 1
SCREW, SM4.76
23
108549001 1
O RING
24
S50098101 1
POSITIONING PIN
25
100328001 1
NOTCH SPRING
26
SA2523001 1
DIAL LOCK LEVER
27
S39830101 1
SPRING
28
SA2796001 1
FEED REGULATOR 7
29
016061031 2
SET...8720B-202 10
Parts Manual - English - Page 16
F Feed shaft mechanism
REF.NO CODE Q'TY
ຠฬ
NAME OF PARTS
RM
1
SA3855001 1
2
SA3965001 1
3
SA4028001 1
4
SA2543001 1
5
108802001 1
6
SA2544001 1
7
012060636 1
8
...SET SCREW, SOCKET (FT) M6X6 FEED ROCKER BASE ARM SCREW, M5X12 WICK, 3X3 L=200 FEED BAR SLIDE BLOCK ASSY SCREW, FLAT #0 M2X4 WICK SUPPORT SCREW, PAN M4X6 WICK, L=400 OIL TUBE, L=100
T-8720B...
Parts Manual - English - Page 18
...CODE Q'TY
ຠฬ
NAME OF PARTS..., 4X4 L=100
15
012500536 1
SET SCREW, SOCKET (FT) M5X5
16...SET SCREW, (FT) M6
22
SA2575001 1
SET SCREW, (FT) M6
23
SA6301001 1
PINION GEAR SCREW ASSY
24
SA2574001 3
SET...SUPPORT
32
062400616 1
SCREW, PAN M4X6
52
SA6294001 1
THRUST RING
53
SA6307001 1
PINION GEAR SET... 4X4 L=100
15
012500536 1
SET SCREW, SOCKET (FT) M5X5
16...
Parts Manual - English - Page 36
Z2 Accessories
REF.NO CODE Q'TY
ຠฬ
NAME OF PARTS
RM
1
S07558309 1
COTTON STAND ASSY, 3DRTHF
2
S51283001 3
SPOOL STAND BASE
3
150182000 3
SPOOL MAT
4
S51282101 3
SPOOL CUSHION
5
S04109001 1
THREAD GUIDE SUPPORT BAR
6
142997001 1
THREAD GUIDE, 3
7
SA2867001 1
PIPE D SCREW SET, B
8
150206002 1
WASHER, PLAIN 16
9
S38648001 1
NUT, U5/8-28
...
Instruction Manual - English - Page 4
...replacing the bobbin and needle y When not using the machine and when leaving
the machine unattended
If using the machine.
If the machine develops a problem... 8720B, 8750B
iii CAUTION
Sewing
This sewing machine should only be used by Brother.... error occurs in injury. Be sure to slip, and your nearest Brother dealer...position. Use only the proper replacement parts as they cannot move. Wait...
Instruction Manual - English - Page 41
... installed?
Replace the needle with a needle that is incorrect, install the needle correctly.
Thread unravelling at sewing y Is the thread take-up spring tension too strong?
Use a presser foot without grooves. TROUBLESHOOTING
Problem
.... y Is the thread take -up spring too weak? Set the thread take -up to its highest position at the sewing start .
10.
Pull ...
Instruction Manual - English - Page 42
... smoothly, replace the bobbin. TROUBLESHOOTING
Problem 6 Uneven seam
Possible cause
y Is the presser foot pressure too weak?
Adjust so that it .
Adjust the presser foot pressure.
being used? The bobbin winding amount should not be
more that the light-alloy bobbins specified by Brother.
2951M
2124M
17-18 16
17-18
T-8420B, 8450B, 8720B, 8750B...
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