JUKI HZL-25Z Bedienungsanleitung

HZL-25Z

SERVICE MANUAL

SEWING MACHINE

SECTION

PAGE

[ 1 ] DISASSEMBLING OF OUTER PARTS

1. Base cover

1. Lower presser foot and lay machine.

2. Remove 3 screws (1) and take out base cover (2).

* Re-assembling should be done in the reverse way.

2. Gear cover

1. Remove screw (1) and take out gear cover (2).

* Re-assembling should be done in the reverse way.

SECTION

PAGE

3. Face cover

Disassembling

1. Raise presser foot lifter (1).

2. Remove screw (2) and take out face cover (3).

Re-assembling

1. Raise presser foot lifter (1).

2. Insert presser foot lifter (1) into small window (4) of face cover (3).

3. Insert jut (6) of face cover (3) into hole (5) of arm.

4. Fixscrew(2)ttingfacecoverproletoarmprole.

SECTION

PAGE

4. SIDE COVER

Disassembling

1. Remove screw (1), (9).

2. Pushcover(2)asindicatedbyarrowinsertingyourngerintothebobbin

winder hole (3) and take out cover (2).

〔Cover(2)hasttinghook(4).〕

3. When it cannot be removed by the above way, take out base cover (5) and

remove cover (2) from lower part.

Re-assembling

1. Insert hook (6) of cover (2) into small window (7) of base cover (5).

2. Sethook(4)ofcover(2)intotheinsideoffrontcover(8)andxbyscrew(1),(9).

SECTION

PAGE

5. FRONT COVER

Disassembling

1. Remove side cover and face cover.

〔See page 2 and 3. 〕

2. Remove screws (1), (2), (3) and then securing plate (4).

3. Take out face cover (8) removing hook (7) from small window (6) of base

cover (5).

Re-assembling

1. Insert hook (7) of front cover (8) into small window (6) of base cover (5).

2. Fixscrews(1),(2)and(3)puttingfrontcover(8)uponarmprole.Alsox

securing plate (4).

SECTION

PAGE

6. SHUTTLE COVER

Disassembling

1. Remove screw (1) and take out securing plate (2).

2. Remove shuttle cover (3) extracting as indicated by arrow.

* Re-assembling should be done in the reverse way.

SECTION

PAGE

7. Hand wheel

Re-assembling

1. Set washer (a) and washer (b) in position as illustrated and fix them by

tightening stud screw (c) by hand.

2. Set clutch wheel (d) in position so that its projected portion may be posi-

tioned as illustrated.

3. Fix clutch wheel (d) with screw and tighten it clockwise.

** Disassembling should be done in reverse way.

SECTION

PAGE

2 - 0

[ 2 ] ADJUSTMENTS

* Adjustment can be made with or without removal of outer parts.

Adjustment

Without

removing

outer

parts

Removing outer parts

Front

cover

Face

cover

Side

cover

Gear

cover

Base

cover

2 - 1 L-R positioner ○

2 - 2 Needle position

Straight and Zigzag max ○

2 - 3 Needle side motion ○

2 - 4 Clearance cam and cam follower ○

2 - 5 Feed dog height ○

2 - 6 Feed dog longitudinal positioning ○

2 - 7 Feed dog lateral positioning ○

2 - 8 Feed dog timing

Vertical Movement ○

2 - 8 Feed dog timing

Lateral Movement ○

2 - 9 "0"-Feeding needle position ○

2 - 10 Buttonhole sewing -"0" feeding ○

2 - 11

Balance of reverse stitch length ○

2 - 12 Balance of stitch length - stretch stitch ○

2 - 13 Presser foot height ○

2 - 14 Needle height ○

2 - 15 Needle clearance to Shuttle ○ ○

2 - 16 Needle timing to Shuttle ○

2 - 17 Control panel pointer positioning ○

2 - 18 Belt tension ○

2 - 19 Hooking Fork Position of

Needle Threader ○

2 - 20 Bobbin winder ○

2 - 21 Rubber foot height ○

SECTION

PAGE

2 - 1

2 - 1 L - R positioner

Checking:

1. Move the needle to the left end by hand.

2. Check if the needle touches the left end of needle hole of needle plate.

Adjustment:

1. Lay the machine.

2. Loosen screw (1) and move L - R positioner (2) to left or right for adjust-

ment.

3. Tighten screw (1).

NOTE: * Needle will be broken if needle is outside of left end of needle hole.

* Selector dial can not be turned smoothly if there is clearance of

more than 0.3 mm between left end of needle hole and needle.

SECTION

PAGE

2 - 2

2 - 2 Needle position - Straight stitching and Zigzag stitching,

maximum width

Checking:

1. Remove presser foot.

2. Set machine at "straight stitching A" by turning selector dial.

3. Turning hand wheel by hand, lower the needle and check if needle point

comes to the center of needle plate hole.

4. Set machine at "zigzag stitching C (maximum width)" by turning selector dial.

5. Turning hand wheel by hand, move needle to right and left end, and check if

each clearance between needle and needle hole end of needle plate is equal.

Adjustment:

1. Remove face cover.

2. Loosen screw (1).

3. Turning eccentric pin (2), adjust needle position.

4. Tighten screw (1) after adjustment.

Straight stitching A Zigzag stitching C

(maximum width)

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