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typical GT1790A - Operation Preparation Steps; Machine Lubrication Process; Needle Installation Procedure

typical GT1790A
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15
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IV. Operation Preparation
1. Lubrication
! Warning
Please turn off the power switch and confirm that the motor has stopped before operation to
prevent personal injuries caused by unexpected start.
1) Lubricating oil to oiling tank
Fill the oiling tank with New Defrix Oil No.1 up to the level indicated by MAX .
2) Adjust the lubrication for the sewing hook
The amount of oil is adjusted with oil amount adjusting screw.
Amount of supplied oil is reduced when turning the screw clockwise.
For newly-installed sewing machine or sewing machine out of service for a long time, please remove
the bobbin case and drip 2-3 droplets of oil on the side slots of the cover. In addition, drip several
droplets of oil into the oiling hole in the metal parts in front of the lower shaft, and make the oil
infiltrate into the felt inside the hole.
2. Attaching the needle
! Warning
Please turn off the power switch and confirm that the motor has stopped before operation to
prevent personal injuries caused by unexpected start.
Hold needle with its recessed part facing toward the operator side A.
Then deeply insert the needle into the needle bar hole and tighten the
needle setscrew.
Use a DPX5-(#11J, #141) needle.
Turn off the power switch before attaching the needle.
Lubricant amount
adjustment diagram
Lubricant
supply tube
Less
Lubricant amount
More

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