7-1. Daily cleaning ……………………………………………………………………………… 23
7-1-1. Cleaning …………………………………………………………………………… 23
7-1-2. Supplying oil ………………………………………………………………………… 24
7-1-2-1. Oil flow in gear box ……………………………………………………… 24
7-1-2-2. Oil flow in oil tank (KM-2300M & S Type) ………………………… 25
7-1-3. Checking …………………………………………………………………………… 25
7-2. Supplying grease (KM-2300S & F) …………………………………………………… 26
8. Maintenance and repair
……………………………………………………………………………………………………………………………………
27
8-1. Adjusting thread take-up spring …………………………………………………………… 27
8-1-1. Position of thread take-up spring …………………………………………………… 27
8-2. Adjusting right arm thread guide …………………………………………………………… 27
8-3. Adjusting presser foot height ……………………………………………………………… 28
8-4. Adjusting wiper …………………………………………………………………………… 28
8-5. Adjusting needle bar height ………………………………………………………………… 29
8-6. Adjusting height and slope of feed dog……………………………………………………… 29
8-7. Needle and conveying timing ……………………………………………………………… 30
8-8. Needle and hook timing …………………………………………………………………… 30
8-9. Adjusting trimming time …………………………………………………………………… 31
8-10. Adjusting and replacing knife……………………………………………………………… 31
8-10-1. Adjusting fixed knife ……………………………………………………………… 31
8-10-2. Replacing movable knife …………………………………………………………… 32
8-10-3. Replacing fixed knife ……………………………………………………………… 32
8-11. Adjusting bobbin stopper ………………………………………………………………… 33
8-12. Adjusting oil flow in hook (KM-2300M & Stype) …………………………………… 33
8-13. Oil Supply Adjustment (KM-2310 Series) ………………………………………………… 34
8-14. Adjusting automatic knee lifter (Option device) …………………………………………… 35
9. Causes of troubles and troubleshooting
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36