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4. TIMING OF THE UPPER AND LOWER SHAFT
The upper and lower shaft must be positioned cor-
rectly as follows.
Check
1. Remove the front enclosure.
2. Turn the handwheel toward you until the needle is
its lowest point.
At this time, the mark (a - very small molded line
on edge) on the lower shaft timing pulley must be
facing toward you.
Adjustment
1. Loosen the screw (b) tightening the tension pulley
bracket.
2. Slip out the timing belt from lower shaft timing
pulley.
3. Turn the lower shaft timing pulley so that the mark
faces toward you.
4. Hook the timing belt on the pulley.
5. Push the tension pulley bracket lightly (350-400g).
6. Retighten the screw (b)
7. Check the timing again and replace the front
enclosure.
8. When you have adjusted it, check the timing of
the hook again. (Sec. 1)
Settings
2
1
b
2
3
6
5
ネジＡ
a
ネジＡ
350-400g
5
ネジＡ
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