1
ATTENTION
Be sure to observe the following, as they may well become causes for fire, electric-shock,
injuries, 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
1. Products specification
2. Out look
3. Names of principal parts
4. Removing methods of external parts
5. Adjusting methods of each part
.............................................................................................................2
.....................................................................................................................................3
.........................................................................................................4
4.1
4.2
Face plate .........................................................................................................................5
4.3
Cord reel cover .................................................................................................................5
4.4
Belt cover ..........................................................................................................................5
4.5
...........................................................................................................6
4.6
.................................................................................................................6
4.7
Front cover ....................................................................................................................6-7
4.8
Back cover ........................................................................................................................8
5
5
.1
Symbol instructions...........................................................................................................9
.2
Play of arm shaft .............................................................................................................10
5.3
Drop middle point of needle ............................................................................................10
5.4
Height of presser foot......................................................................................................11
5.5
Needle flow at maximum zigzag width............................................................................12
5.6
Drop middle point of needle ............................................................................................13
5.7
Needle position of zigzag................................................................................................14
5.8
Automatic needle threader adjustment ...........................................................................15
5.9
Adjustment of feed rock shaft and feed lifting rock cam .................................................16
5.10 Height of needle bar .......................................................................................................17
5.11 Timing of needle and hook..............................................................................................18
5.12 Distance-needle-hook .....................................................................................................19
5.13 Play between shuttle driver shaft gear and lower shaft gear ..........................................20
5.14 Play of shuttle driver shaft ..............................................................................................21
5.15 Feed-dog height..............................................................................................................22
5.16 Position of feed-dog in relation to the needle plate (left to right) ....................................23
5.17 Upper thread tension adjustment....................................................................................24
5.18 Shuttle hook tension adjustment.....................................................................................25
5.19 Motor belt tension ...........................................................................................................26
5.20 Drop point of needle .......................................................................................................27
5.21 Forward and reverse stitching in buttonhole sewing
(Feeding pitch of reverse and forward stitching is not even) ..........................................28
5.22 Bar tack density (stitch advances in upper or lower bar tacking)....................................29
5.23 Buttonhole length adjustment .........................................................................................30
5.24 Bobbin winding problem .................................................................................................31
..................................................................................................................32-33
6. Circuit diagram
Sewing table .....................................................................................................................5
Free arm foot bush
Free arm cover
Summary of Contents for HZL - 353Z Series
Page 1: ...SEWING MACHINE HZL 350Z series SERVICE MANUAL ...
Page 4: ...3 2 Out look ...
Page 33: ...32 Europe 6 Circuit diagram ...
Page 34: ...33 North America 6 Circuit diagram ...
Page 35: ...030Y4B0101 EN ...
