2 104 72 72-26
ATTENTION
Be sure to observe the following, as they may well become causes for fi re, electric-shock, inju-
ries, and damage to parts.
- Be sure to unplug power source before engaged in disassembly, installation, adjustment.
- In case of installing please pay special care to clamp electrical cords, etc., scars to sheath,
mis-circuit, etc.
- Be sure to use regular standard part in replacing.
CONTENTS
Products specifi cation ................................................................................................................3
Names of principal parts.............................................................................................................4
Removing methods of external parts ........................................................................................5
Adjustments:
Lower thread tension ..................................................................................................................8
Upper thread tension ..................................................................................................................9
Presser bar height and alignment............................................................................................10
The centre position of the needle in the feeding direction ....................................................11
Height of needle bar ..................................................................................................................12
Turning movement of the needle in zigzag and the play of the worm gear ........................13
The centre position of the needle in straight stitching ..........................................................14
Needle position of zigzag .........................................................................................................15
Play of arm shaft........................................................................................................................16
Clearance between needle and hook.......................................................................................17
Play between shuttle driver shaft gear and lower shaft gear ................................................18
Distance adjustment between shuttle driver shaft gear and lower shaft gear ....................19
Timing of needle and hook .......................................................................................................20
Setting the feed lifting in relation to the needle .....................................................................21
Feed dog height .........................................................................................................................22
Clearance between feed dog and the needle plate – Front to Back .....................................23
Clearance between feed dog and the needle plate – Side ways ...........................................24
Stretch stitch balance ...............................................................................................................25
Buttonhole - the colums, cutting space .................................................................................26
Buttonhole - the colums, feed balance ...................................................................................27
Buttonhole - bar tack, zero feeding .........................................................................................28
Motor belt tension .....................................................................................................................29
Bobbin winding ..........................................................................................................................30
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