11e
LOWER LOOPER & CHAIN LOOPER AUTOMATIC ENGAGEMENT
h
Lower Looper
Chain Looper
Washer
0.5
‘
2.0
h
b
b
a
A
7. Lower Looper:
Turn handwheel towards you to bring lower looper to its far right position. Press lever
"a"
downwards. Turn handwheel towards you again and check if lever
"a"
returns automatically
to its initial position. If not, loosen screw
"h"
and insert a washer under the plate
"b"
to get
the gap 0.5
~
2.0 as shown in Fig. 12.
Chain Looper:
Turn handwheel towards you to bring needle bar to its lowerst position. Lift up lever
"A"
to
disengage chain looper. Turn handwheel towards you again and check if chain looper is
automatically engaged. If not, loosen screw
"h"
and slide the plate
"b"
right or left to get the
gap 0.5
~
2.0mm as shown in Fig. 13.
Note: If either lower looper or chain looper is set apart from the plate
"b"
so far or if either of
two touches the plate
"b"
, handwheel is blocked and can not be turned.
Fig.10
Fig.12
Fig.11
0.5
‘
2.0
Fig.13
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...