Maintenance; Changing The Upper Knife; Changing The Lower Knife; Cleaning And Lubricating - JUKI MO-644DN Instruction Manual

Maintenance

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WARNING :
Please refer to the safety instructions.

Changing the upper knife

The upper knife (moving knife) is made from special hardened ma-
terial.
Replace the upper knife only when the knife blade tip is damaged.
For a replacement, contact your local dealer.

Changing the lower knife

Main switch off "O". Disconnect machine from electri-
city supply.
Turn handwheel towards you until needles are fully raised. Match
the matching up marks on hand wheel and side cover. Raise the
upper knife.
Loosen the setscrew on the lower knife retaining plate. Remove the
lower knife.
Fit the replacement knife (from accessory bag) in the groove so that
the sharp edge is in line with the stitch plate. Re-tighten the set-
screw.

Cleaning and lubricating

Main switch off "O". Disconnect machine from electricity
supply.
During sewing, dust and fluff collect in and on the machine. This
should be removed regularly. Your overlock machine requires very
little lubrication. Now and then, lubricate only the points illustrated.
Please refer to safety instructions.
Precautions to be taken when handling oil
* In the event the oil gets in the eye or adheres on skin, imme-
diately wash it off in order to prevent irritation and rash.
* If swallowed accidentally, immediately seek for medical ad-
vice in order to prevent diarrhea and vomiting.
* Keep the oil away from children.
* Oil disposal is obliged by legislation. Dispose of the oil prop-
erly in compliance with the relevant legislation.