E
Relationship between the rotating
hook motion and the thread take-up
lever motion
When the timing belt is removed for replacement,
etc., the relation between the rotating hook motion
and the thread take-up lever motion should be
adjusted as follows:
( 1 ) Turn the pulley and stop when the thread
take-up lever is lifted to the highest position.
( 2 ) Lean the machine head backward and check
that the arrow (timing mark) put on the
timing belt is aligned with the black line on
the boss of lower shaft bearing.
( 3 ) If the timing mark is not in line with the
black line, remove the timing belt and install
it again to adjust.
F
Relationship between the rotating
hook motion and the opener motion
( 1 ) Turn the pulley by your hand and stop it
at the position where the opener holder is
located most remotely from the throat plate.
( 2 ) Check that the gap between the lug Ⓐ and
the opener is approximately 0.2 mm.
( 3 ) If the gap is too large or small, loosen the
opener holder screw Ⓑ and adjust position of
the opener.
HOW TO USE
Timing belt pulley
Timing mark (arrow)
Black line on boss of
lower shaft bearing
Timing belt
Approx. 0.2 mm
Opener
Opener holder
Ⓐ
Screw
Ⓑ
— 12 —
Summary of Contents for LT2-2250-B1T
Page 28: ...Printed in Japan ...
