34
4. After turning idly the sewing machine for three minutes (at
an appropriate speed), secure the oil flow checking paper as
shown in Fig. 58 and run the machine for about five seconds.
Then check the oil tape marked on the paper.
5. Check the oil supply level three times. The appropriate level
of oil is when the oil level neither exceeds the maximum
amount nor falls below the minimum level. (Insufficient oil
would jam the hook, whereas excessive oil would
contaminate the sewing material with oil.)
[ Figure 58 ]
Hook
Bed
Oil Flow
Checking Paper
Resulting Oil Tape
Minimum
Optimum Level
about 0.5mm about 1mm
Maximum
Optimum Level
Resulting Oil Tape
3~10mm
More
8-13. Oil Supply Adjustment
(KM-2310 Series)
1. Adjusting oil supply to thread take-up lever
1) As in the figure, when the punched mark② on the oil
volume adjusting pin head ① is aligned with the hole of
the needle bar crank③, the oil supply volume will
become maximum. As the oil volume adjusting pin ① is
turned left or right and becomes closer to the edge⑤ of
the crank cam plate④, the oil supply volume grows
smaller.
1) When the punched mark passes the edge ⑤ of the crank
cam plate, no oil will be supplied.
2. Adjusting oil supply to hook
1) As in the figure, turn clockwise (＋) the oil volume
adjusting screw①, which is inserted into the low-axis
front bushing, and the oil supply will increase. If the oil
volume adjusting screw is turned counter-clockwise (－),
the oil volume will decrease.
[ Figure 59 ]
①
②
③
④
⑤
[ Figure 60 ]
①
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