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1. NAMES OF MAJOR PARTS ............................... 1
2. MACHINE SPECIFICATIONS ............................... 3
3. OPTIONAL PARTS ............................................... 5
4. WORK TABLE AND MOTOR .............................. 7
5. INSTALLATION
.......................................................... 9
5-1. Installing the oil pan ........................................... 10
5-2. Installing the machine head ............................... 11
5-3. Installing the knee lifter plate ............................. 12
5-4. Adjusting the knee lifter ..................................... 13
5-5. Installing the belt ................................................. 14
5-6. Installing the bobbin winder .............................. 14
5-7. Installing the belt cover ...................................... 15
5-8. Ground Wire Connections .................................. 17
5-9. Installing the cotton stand .................................. 18
5-10. Lubrication ........................................................... 19
5-11. Checking the machine pulley rotating
direction ................................................................ 20
6. PREPARATION BEFORE SEWING
6-1. Installing the needle ............................................ 21
6-2. Removing the bobbin case ................................. 22
6-3. Winding the lower thread ................................... 23
6-4. Installing the bobbin case .................................. 25
6-5. Threading the upper thread ............................... 27
6-6. Adjusting the zigzag width ................................. 29
6-7. Adjusting the needle position ............................ 31
6-8. Adjusting the stitch length ................................. 33
6-9. Cautions when replacing gauge parts ............... 34
6-10. Backtacking ........................................................... 35
7. SEWING ...............................................................
7-1. Sewing .................................................................. 38
8. THREAD TENSION
.................................................... 39
8-1. Adjusting the thread tension .............................. 39
8-2. Adjusting the presser foot pressure .................. 41
9. CLEANING ............................................................
10. STANDARD ADJUSTMENTS
10-1. Adjusting the thread tension spring .................. 47
10-2. Adjusting the presser foot height ...................... 49
10-3. Adjusting the feed dog height ........................... 50
10-4. Adjusting the feed dog angle ............................ 51
10-5. Adjusting the forward/back position of the
feed dog ............................................................... 53
10-6. Adjusting the needle and feed mechanism
timing .................................................................... 54
10-7. Adjusting the needle bar height ........................ 55
10-8. Needle and rotary hook timing ......................... 57
CONTENTS
......................... 21
37
43
............................... 46
LZ2-B850, B851 (English)
10-9. Hook stopper position ......................................... 57
10-10. Adjusting the rotary hook lubrication
amount .............................................................. 61
11. INSTALLING OPTIONAL PARTS
11-1. Presser bar U and presser bar tip ..................... 64
11-2. Thread guide F .................................................... 67
12. TROUBLESHOOTING
12-1. Machine head ...................................................... 69
......................... 63
............................................. 69
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