Putting Across The V-Belt - Mitsubishi PLK-E0504 Technical Manual

3-10. Putting across the V-belt

Caution
For safety purposes, tilting or raising of the sewing machine must always be carried out by
two or more workers. Apply a stopper on the leg casters to prevent the table from moving,
and then securely support the bed base and the sewing machine head.
Hold the work holder frame to prevent it from dropping down when tilting the sewing
machine
(1) Tilt the sewing machine head to the left, and hold it with the head rest.
(2) Put the V-belt (NO.4) across the sewing machine pulley and the motor pulley with passing it
through the slit on the tabletop.
(3) Raise the tilted sewing machine head to the original position.
(4) Push the center portion of V-belt by the finger with the presser of about 1Kg.
If the V-belt tension is proper, it should be yielded about 10mm.
If the V-belt tension is not proper, please adjust it as follows.
(5) Loosen two nuts (No.2,3) on the motor position adjust bolt (No.1). Fix the motor (No.5)
position with putting the tension to the V belt by its weight and firstly, tighten the upper nut
(No.2) then secondly, tighten the lower nut (No.2).
Please make sure to fasten the nuts (NO.5) firmly after the adjustment.
(6) Put the motor pulley cover on the motor with the set screws.
NOTE The V-belt becomes loose after along period machine running.
If the looseness is recognized definitely, firstly turn the power OFF then, adjust the
V-belt tension again as the above procedure (4).
4
10mm
1
2
3
5
－6－