Lubrication; Oil; Lubricating Oil; Oil Gauge/Oil Window - SunStar SC 7900-Series User Manual

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LUBRICATION

Check the OFF-status condition of a power switch before lubricating.
Warning

1) OIL

Use the industrial sewing machine oil which is provided by SUNSTAR or SF oil from YANASE.
Do not put foreign substances into the lubricating oil to prevent oil from aging of and breaking
down.
Caution
2) LUBICATING OIL
This sewing machine is shipped without oil. To use the machine without breakdown, remove the oil cap screwⓐ, ⓑ and then
lubricate oil to the top limit of the oil gaugeⓒ, ⓓ.
ⓐ ⓔ
Small quantity of lubricating oil cause the machine breakdown and large quantity of lubricating
oil cause the quality deterioration because of the spattering of the oil .
Caution

3) OIL GAUGE/OIL WINDOW

Check the oil gaugeⓒ, ⓓ before operating the sewing machine. Lubricate oil when the oil indicator or the oil surface (refer to the
figure 18, 19) is under the 2 lines. Check the spattering of the oil through the oil windowⓔ, ⓕ when operating the sewing machine.
20
ⓒ
ⓕ
ⓑ
[ Figure 18 ]
ⓓ
[ Figure 19 ]