POSITION OF THE DISPLAY DRUM INDICATOR
& UPPER LOOPER SHIFTING CAM
F
1. Remove: Mains lead - Front cover
2. Make sure if tension cams and levers are set in proper positions when selecting sewing
program 1
"SAFETY 4 THREAD"
. (See and Check Page E).
3. Select sewing program 10
"COVER HEM/CHAINSTITCH".
4. Bring the needle bar to its lowest position by turning a handwheel toward you.
5. Loosen screw
"a"
and turn the upper looper shifting cam
"b"
until the hook of the looper
follower
"c"
falls into the V-shaped hollow of the cam
"b"
(See View A ). Check if a
cam
"b"
and looper follower
"c"
are positioned as shown in View B .
6. Fasten screw
"a"
and recheck if the upper looper shifting connector
"d"
is pulled
up by a spring.
view A
b
c
view B
b
c
a
a
b
c
d
A
SELECT
2 mm
1.0~1.5mm
B
Summary of Contents for 745 -
Page 1: ...745 845 SERVICE MANUAL 2 2 5 5 1 3 5 NA 6 0 B 1 2 1 T P T P...
Page 18: ...a HEIGHT AND ALIGNMENT OF CLOTH PRESSER BAR 4a 5 b c 4 7mm...
Page 24: ...TIMING OF LOWER LOOPER 8a A B C D b a 5 2mm R1 Fig 1 Fig 2 Fig 3...
Page 51: ...ANNEX SETTING POSITIONS OF SL DF DIALS b c f d g e 2 1 C B A...
Page 61: ...M E M O...