SunStar KM-750 User Manual page 12

b) As can be seen on figure 5, make sure to supply oil into the oil holes marked in red and into each friction part, before
moving the sewing machine.
c) Hook oil level check
Check whether the amount of oil sprinkled from the
hook for 10 seconds is as is on figure 6.
To adjust the amount of oil supply, turn the oil supply
screw on the hook base to the right ① to decrease the
oil supply, and to the left to increase the oil supply.
(see figure 6)
B. As test operation, run the machine for 10 minutes at about 1,500 SPM.
For the first 4~5 days of using the machine, operate the machine at less than 2,400 SPM per minute. Then, start using at
normal pace. This will help good performance of the machine along the way.
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[Figure 5]
non oxidized oil
white paper
[Figure 6]