– 14 –
❶
❷
❷
❶
Switch "off" the motor.
Use 135x17 needles.
1) Turn the handwheel to bring the needle bar to
the highest position of its stroke.
2) Loosen needle clamp screw
❷
. Hold the nee-
dle so that the long groove on needle
❶
faces
directly to the right for the LU-2810, 2810-7 and
2818-7, and so that the long groove on each the
two needles faces inward for the LU-2860, 2860-
7 and 2868-7.
3) Push needle
❶
deep into the needle clamp hole
until it will go no further.
4) Tighten needle clamp screw
❷
rmly.
Long groove
❶
❷
When replacing the needle, check the clear-
ance provided between the needle and the
blade point of hook. (Refer to "4-5. Needle-
to-hook relation" p.27 and "4-6. Adjusting
the hook needle guard" p.28.)
If there is no clearance, the needle and the
hook will be damaged.
LU-2810, LU-2810-7, LU-2818-7
LU-2860, LU-2860-7, LU-2868-7
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.
Long groove
LU-2860, LU-2860-7, LU-2868-7
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 ve seconds as
shown in the gure on the left.
A sheet of
paper
In the case the oil quantity in the
hook cannot be adjusted to the
proper quantity, it should be ad-
justed 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.
❸
❹
B
A
❺
❻
C
D
3-2. Attaching the needle
❶
❷
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