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6. MAINTENANCE
6-1. Changing procedure to bottom feed and the adjustment
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
[LH-3528]
5
4
1
8
Needle
C
B
A
3
1
2
6
7
!3
!0
!2
!1
9
9
!0
!2
!1
!3
)
Loosen hinge screw 1 after adjusting the
feed dial to the minimum, move needle bar
rocking rod 2 from needle bar rocking rod
arm 3 to needle rocking rod fixing base 4 ,
and fix it with hinge screw 1 .
When hinge screw 1 is difficult
to turn, perform the work after
removing oil tank 6 .
2)
After replacing the feed dog and the throat
plate with the components for bottom feed,
adjust the position of needle rocking rod fixing
base 4 so that the needle center aligns with
needle holes 7 in throat plate 8 , and fix
setscrews 5 .
3)
Loosen setscrews 9 and!3 (2 places) in
sprocket !2 . Loosen the setscrews in the
order of !3 and 9 . At this time, remove screw
No. 9 which is put in screw hole A in
sprocket !2 , and put it in screw hole C which
is located on the opposite side at 180˚.
Turn the pulley by 180˚ without turning the
hook driving shaft, align the flat section of
the hook driving shaft with screw hole C in
sprocket !2 , and fix with setscrews 9 . Screw
No. !1 in the hook driving shaft rear bearing
!0 aligns with the flat section of the hook
driving shaft. Make the state as the standard.
Then fix screw No. 2!3 which is put in screw
hole B in sprocket !2 as well.
– 25 –
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