– 44 –
1) Adjust distribution board
❶
to adjust
the oil quantity in the left hook or distri-
bution board
❷
to adjust the oil quanti-
ty in the right hook as described below.
2) Loosen nut
❸
and turn oil amount ad-
justment screw
❹
to adjust the amount
of oil in the hook.
Turning the screw clockwise
A
will de-
crease the amount of oil in the hook or
counterclockwise
B
will increase it.
3) The appropriate amount of oil, when a
sheet of paper is placed near the pe-
riphery of the hook, is to such an extent
that splashes of oil from the hook ap-
pear in approximately five seconds as
shown in the figure on the left.
In the case the oil quantity in
the hook cannot be adjusted to
the proper quantity, it should be
adjusted by loosening nut
❺
and
turning oil quantity adjusting
screw
❻
.
The oil quantity in the
hook is increased by turning the
oil quantity adjusting screw coun
-
terclockwise C, or is decreased by
turning it clockwise D.
Also check to be sure that the oil
is fed to the hook at the sewing
speed of 1,000 sti/min.
4-12. Adjusting the oil quantity in the hook
WARNING :
To check the amount of oil supplied to the hook, take care not to allow your finger and the oil-amount
checking sheet to come in contact with the moving parts such as the hook and feed mechanism.
Contacting those parts can cause injury.
❸
❹
B
A
❺
❻
C
D
❶
❷
A sheet of
paper
