Table of Contents
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1. NAMES OF MAJOR PARTS
2. MACHINE SPECIFICATIONS
3. OPTIONAL PARTS (748A)
4. WORK TABLE
............................................
5. MOTOR (746A)
............................................. 06
6. INSTALLATION
.........................................
6-1.
Installing the oil pan ............................ 08
6-2.
Installing the machine head ............... 09
6-3.
Installing the knee lifter assembly
(746A/748A-10 , 40 ) ......................... 10
6-4.
Installing the belt ................................. 11
6-5.
Installing the bobbin winder ............... 12
6-6.
Installing the belt cover ....................... 13
6-7.
Installing the cotton stand .................. 16
6-8.
Ground Wire Connections (746A) ...... 16
6-9.
Lubrication ............................................ 17
6-10. Checking the machine pulley
rotating direction .................................. 18
7-1.
Installing the needle ............................ 19
7-2.
Removing the bobbin case ................. 20
7-3.
Winding the lower thread ................... 21
7-4.
Installing the bobbin case ................... 23
7-5.
Threading the upper thread ................ 24
7-6.
Adjusting the stitch length .................. 25
7-7.
Using the thread wiper
(748A-40 , 90 , option) ..................... 26
......................................................... 27
8-1.
Sewing .................................................. 28
8-2.
Backtacking ........................................... 28
CONTENTS
....................
9. THREAD TENSION
01
...................
02
.......................
03
05
10.CLEANING
07
........... 19
SL-746A, 748A (English)
.......................................
9-1.
Adjusting the thread tension .............. 29
9-2.
Adjusting the presser foot
pressure ................................................ 30
9-3.
Adjusting the trailing length after
thread trimming (748A) ....................... 30
.................................................
11-1. Adjusting the thread tension
spring .................................................... 38
11-2. Adjusting arm thread guide R ............ 40
11-3. Adjusting the presser foot height ...... 41
11-4. Adjusting the feed dog height ............ 42
11-5. Adjusting the feed dog angle ............. 43
11-6. Adjusting the needle bar height ......... 44
11-7. Adjusting the needle and feed
mechanism timing ............................... 45
11-8. Adjusting the needle and rotary
hook timing ........................................... 47
11-9. Checking the rotary hook and
B-case holder position bracket
clearance ............................................... 48
11-10.Adjusting the upper shaft and
rotary hook lubrication amount ......... 48
MOVABLE KNIFE (748A)
2-1. Replacing the fixed knife ..................... 51
1
12-2. Replacing the movable knife .............. 52
................................. 53
29
33
................... 37
.........................
51
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