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(2) Upper looper
Use a proper upper looper in accordance with the needle No. When ordering, refer to the Parts List. The
numbers shown in frame in the table below are engraved markers. In addition, the letters in ( )
parentheses are the kinds of the needles.
Parts Nos. with an asterisk * are factory-installed on the standard machine heads at the time of delivery.
Model Nos. engraved on Needle No.
upper looper (kind)
MO-6704D series *1188 81 #9 #11 #14
MO-6716D series
MO-6714D series *1217 60
Part No. Color Natural length Operating length Weight required to compress
(mm) (mm) spring to working length
13137807 Red 19.5mm 11.5mm 4.21±0.49N (430±50g)
13138508 Yellow 17.8mm 9.8mm 3.14±0.34N(320±35g)
13138805 Blue 17.3mm 9.3mm 1.47±0.20N(150±20g)
4. ADDITIONAL INFORMATION AND PRECAUTIONS
2) Springs used for each model.
Needle thread Double-chainstitch Upper looper Lower looper
needle thread thread thread
MO-6704D series Red — Yellow Blue
MO-6714D series Red • Yellow — Blue Yellow
MO-6716D series (30P included) Red Yellow Yellow Blue
MO-6716D- -4 H, -50H Red Red Blue Yellow
Model
Where to use
(1) Thread tension
1) Strength of tension spring
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