1. SPECIFICATIONS
Model name
Model
Stitch type
Example of application
Max. sewing speed
Needle gauge of model
Needle height
Stitch length
Needle
Needle bar stroke
Dimensions
Periphery of cylinder
Weight
Lift of presser foot
Feed adjustment method
Looper mechanism
Lubricating system
Lubricating oil
Oil reservoir capacity
Installation
Noise
Needle feed amount adjustment
function
Needle-feed double chainstitch cylinder bed machine
2-needle 4-needle
MH-1410A MH-1410B MH-1410C MH-1410D
ISO standard 401
Waist band attaching of jeans, casual pants, etc.
5,000 rpm (Less than 4.5 mm pitch) 4,000 rpm (More than 4.5 mm pitch)
31.8mm 34.9mm 38.1mm 6.4 – 25.4 – 6.4mm
(1-1/4”) (1-3/8”) (1-1/2”) (1/4”–1”–1/4”)
10 to 10.2 mm
2.1 to 6.4 mm
ORGAN DV x 57 (62 x 57, SY3260, 5640) #18 to #25 (Standard #21)
32mm
Width : 496 mm Length : 220 mm Height : 440 mm
395 mm
46 kg
9 mm
Push-button type
Needle feed synchronizes with lower feed.
Back and forth motion type (Longitudinal oscillation type) Looper pop-up (throw-
out) at the time of threading type
Automatic lubrication by trochoidal pump
JUKI New Defrix Oil No. 2 (Equivalent to ISO standard VG32)
900mR
Installation on the top surface of table
Workplace-related noise at sewing speed
n= 4500 min-1 : LPA ≦85 dB (A)
Noise measurement according to DIN 45635-48-A-1.
-5% to +25% of needle feed amount in terms of lower feed amount can be
adjusted.
Model name Needle-feed double chainstitch cylinder bed machine (with mechanical cloth puller)
Model MH-1410 □/ V072
Max. sewing speed 4000rpm
Dimensions Width : 496 mm Length : 270 mm Height : 440 mm
Weight 50kg
Device feed adjustment method Eccentric infinitely adjustable type
* Specifications which are not described above are common to those of the sewing machine head.
Auto-lifter AK122 / Pneumatic drive type
−1 −
2. CONFIGURATION OF THE MACHINE COMPONENTS
!1
1
2
3
4
5
6
7
8
9
!0
@1
@0
!2
!3
!6
!5
!4
!7
!8
!9
1 Upper feed roller lifting lever 8 Thread guide plate !5 Finger guard
2 Roller press bar bushing (upper) 9 Handwheel !6 Looper
3 Presser spring regulator !0 Thread tension nut !7 Eye guard cover
4 Oil sight window !1 Upper feed roller !8 Looper thread eyelet
5 “Oil” indication !2 Lower roller !9 Looper thread take-up
6 Oil hole cap !3 Throat plate holder @0 Oil gauge
7 Silicon oil lubricating unit !4 Throat plate @1 Push button
−2 −
1 Upper feed roller lifting lever
Lever to raise or lower cloth puller (V072)
2 Roller press bar bushing (upper)
Screw to adjust the pressure of upper feed roller
3 Presser spring regulator
4 Oil sight window
Window to check lubrication during operation of the sewing machine
5 “OIL” indication
Mark to show oil hole
6 Oil hole cap
Remove this cap to lubricate when lubricating.
7 Silicon oil lubricating unit
This unit is used to prevent thread from thread breakage or stitch skipping in case of high speed sewing
or using synthetic thread.
8 Thread guide plate
9 Handwheel
!0 Thread tension nut
!1 Upper feed roller
!2 Lower roller
!3 Throat plate holder
!4 Throat plate
!5 Finger guard
Guard to prevent human body (mainly fingers) from coming in contact with needle.
!6 Looper
!7 Eye guard cover
Cover to prevent human body (mainly eyes and face) from coming in contact with needle due to needle
breakage
!8 Looper thread eyelet
This is used when adjusting the draw-out amount of thread with looper.
!9 Looper thread take-up
This is used when adjusting the draw-out amount of thread with looper.
@0 Oil gauge
Gauge to check oil
@1 Push button
Button to change feed amount
−3 −
3. STANDARD ADJUSTMENT
(1) Timing between the upper shaft and the lower shaft
Standard Adjustment
™ Turn the handwheel 1 to adjust marker pin 2 to “P” on the handwheel 1. (Needle is placed at the
upper dead point position.)
1
- P
2
™ Remove three setscrews 4 in bearing
cover (lower) 3 and confirm the edge
of the lower shaft.
3
™ Remove the top cover.
(Four setscrews 5 are used to tighten.)
4
™ It is standard that the line of the edge
of lower shaft is vertical and the marker
dot is above.
Marker dot
7
5
6
−4 −
Adjustment Procedures Results of Improper Adjustment
1. Loosen seven top cover setscrews and remove the top cover.
2. Loosen four setscrews 5 in the timing belt pulley of upper
shaft 6.
3. Turn timing belt pulley 7 with the upper shaft fixed and tighten
four setscrews 5 in the timing belt pulley at the position where
the line of the edge of lower shaft is vertical and the marker
dot is above.
4. To check again, turn handwheel 1 and check the line of the
edge of lower shaft and the marker dot at the upper dead point
position of the needle.
5. Attach bearing cover (lower) 3 and the top cover which have
been removed.
™ If the timing between the upper
shaft and the lower shaft is
improper, stitch skipping, thread
breakage or needle breakage
may be caused.
−5 −
(2) Adjusting the height of the needle bar
Standard Adjustment
<Checking procedure>
1
10.0 to 10.2 mm
2
™ Remove rubber cap 3 in the face plate. ™ Loosen the screw with the slit screwdriver.
1)Remove the presser foot.
2)Turn the handwheel to place needle 1 to its
upper dead point position.
3)Measure the dimension from top surface 2 of
the throat plate to the needle tip and check that
it is 10.0 to 10.2 mm.
3
™ Adjusting the parallelism
Slit screwdriver
Corresponding positions (parallel)
Parallel
−6 −
Adjustment Procedures Results of Improper Adjustment
1. Remove rubber cap 3 in the face plate.
2. Turn the handwheel to place the needle bar at its upper dead
point position and loosen the needle bar bracket screw from
the hole where rubber cap 3 is removed with the slit
screwdriver.
3. Adjust the needle bar up or down so that the dimension from
the top surface of throat plate 2 to the needle tip is 10 to 10.2
mm, and temporarily tighten the needle bar bracket screw.
4. Turn the needle bar and adjust so that all needle tips of 2needle or 4-needles enter the corresponding positions (parallel)
of the needle holes of the feed dog when turning the handwheel
and the needle tips enter the needle holes of the feed dog.
Then tighten the needle bar bracket screw.
5. Attach rubber cap 3.
™ Stitch skipping or needle
breakage may be caused unless
the needle tips are in the same
position (parallel).
−7 −
(3) Adjusting the feed dog
Standard Adjustment
1) Adjusting the lateral direction of the feed dog
2) Adjusting the longitudinal direction of the feed dog
8
™ Dimension of A and B is the same and A
and B should be parallel.
46
B
A
™ Adjusting longitudinal/lateral position of the
feed dog (For the standard machine,
remove cylinder cover (rear) and for V072,
remove the lower roller.)
2
™ When dimension of A and B is not
parallel, loosen setscrews 1 in the feed
dog to adjust.
5
1
4
™ Lateral position of the feed dog
(Rear side)
™ Clearance E should be parallel and equal.
7
E
3
E
Clearance
CD
™ Clearance between the rear of feed dog
and the throat plate
3
0.5 to 0.8 mm
−8 −
Adjustment Procedures Results of Improper Adjustment
1) Adjusting the lateral direction of the feed dog
1. Remove throat plate holder 7 (with throat plate) using four setscrews,
and check whether feed dog 4 is assembled parallel to feed dog
holder 5. Checking procedure is that the distances A and B between
the left edge of bed 6 and the front and rear of the left edge of feed
dog 4 are the same and parallel.
2. If they are not parallel, loosen two setscrews 1 in the feed dog to
adjust the parallelism, and tighten two setscrews 1 in the feed dog.
(Caution) When tightening setscrews 1 in the feed dog, remove
feed dog 4 together with feed dog holder 5 using
setscrew 8 and fix feed dog holder 5. Then tighten
setscrews 1 in the feed dog.
3. After fixing feed dog 4, install feed dog holder 5, and fix it with
setscrew 8.
4. Remove four setscrews in the cylinder cover (rear) to perform the
adjustment of lateral and longitudinal directions of the feed. (In case
of the machine with V072, remove the lower roller.)
5. Loosen two setscrews 2 in the feed base to perform the adjustment
of lateral and longitudinal positions of the feed dog.
6. Adjust the lateral position of the feed dog so that needles enter in the
center of C and D, needle entry of the feed dog.Then temporarily
tighten setscrews 2 in the feed base. (The same for 4-needle
machine)
7. Attach the throat plate and determine the position of the throat plate.
(Attach the throat plate together with throat plate holder 7 while
temporarily tightening three setscrews 3 in the throat plate.)
8. Turn the handwheel and move the throat plate so that the clearance
between the feed dog and the groove of the throat plate should be
parallel E and equal. Then tighten setscrews 3 in the throat plate.
(Caution) It is difficult to tighten one of setscrews 3 in the throat
plate . Remove the throat plate together with the throat
plate holder 7 and tighten the setscrews 3 in the throat
plate.
™ Needle breakage or stitch skipping
will be caused.
™ Breakage of the spreader pin will
be caused due to the contact of the
spreader pin and the feed dog.
2) Adjusting the longitudinal direction of the feed dog
1. Attach the throat plate to adjust the longitudinal direction of the feed
dog.
2. To adjust the longitudinal direction of the feed dog, change the feed
amount to the maximum.
(Caution) If the feed dog is positioned in the front direction, the
spreader comes in contact with the loop deflector
located in the wrong side of the feed dog. As a result,
the spreader may break.
3. When the feed amount is set to the maximum, provide a clearance
of 0.5 to 0.8 mm between the rear of the feed dog and the throat
plate, and fix the feed dog with setscrews 2 in the feed base.
(Caution) Turn the handwheel and check that there is no contact
between the feed dog and the throat plate. At the same
time, check the lateral position and the direction to check
that there are equal lateral clearances.
4. When the longitudinal and lateral positions have been determined,
remove throat plate holder 7 with the throat plate, and tighten
setscrews 3 in the throat plate which have been temporarily tightened
to fix the throat plate.
5. Attach the cylinder cover (rear) which has been removed.
6. Return the feed amount which has been changed to the maximum
to the proper feed amount.
7. Attach throat plate holder 7.
−9 −
(3) Adjusting the feed dog
Standard Adjustment
3) Adjusting the height of the feed dog
™ Loosen feed dog holder setscrew 1.
1
™ Loosen feed dog height adjusting screw 2 and nut 3 to adjust the height.
2
3
4
4) Adjusting the tilt of the feed dog
™ When the feed dog goes up to its highest position.
1±0.1 mm
™ Remove screw 5 in the adjusting hole.
Top surface of the throat plate
Parallel
5
−10 −
Adjustment Procedures Results of Improper Adjustment
3) Adjusting the height of the feed dog
1. Remove needle, presser foot and throat plate holder (with throat
plate).
2. Loosen feed dog holder setscrew 1, feed dog height adjusting
screw 2 and nut 3.
3. Attach the throat plate holder (with throat plate).
4. Adjust so that the height of the feed dog is 1±0.1 mm from the
top surface of the throat plate when the feed dog goes up to its
highest position. Then fix it with feed dog holder setscrew 1.
5. Remove the throat plate holder (with throat plate).
6. Tighten feed dog height adjusting screw 2 until it comes in
contact with feed base 4 and fix it with nut 3.
7. Attach throat plate holder (with throat plate), needle and presser
foot.
™ If the feed dog is raised
excessively high, the return is
performed before the feed dog
sinks. As a result, a bad influence
is given to the finish of sewing.
™ Chain-off thread is hard to come
out.
™ If the feed dog is lower than the
specified height, feed pitch is
decreased.
4) Adjusting the tilt of the feed dog
1. Remove screw 5 in the adjusting hole.
2. Loosen the hexagon socket head bolt located in the rear of the
adjusting hole to adjust the tilt.
3. Adjust the tilt so that the top surface of the throat plate is parallel
to the top surface of the feed dog when the feed dog goes up
to its highest position.
4. After the adjustment, tighten the hexagon socket head bolt.
(Caution) When attaching screw 5 in the adjusting hole,
apply sealant to the screw for the remedy of oil
leakage.
−11 −
(4) Adjusting the longitudinal position of the needle feed
Standard Adjustment
™ Remove rubber cap 1.
1
™ Press push button 3.
™ Loosen setscrew 2 to adjust.
2
3
™ Position of needle eyelet and feed dog
0.5 to 0.8 mm
−12 −
Adjustment Procedures Results of Improper Adjustment
1. Remove white rubber cap 1 located in the front of the machine
arm.
2. Change the feed amount to the maximum. (Press the push
button and adjust the scale of handwheel to “L”.)
3. Turn the handwheel and adjust the needle eyelet to the position
where it sinks to the needle hole of the feed dog.
4. Loosen setscrew 2 in the needle rocker driving lever which is
located in the rear where white rubber cap 1 has been
removed.
5. Provide a clearance of 0.5 mm to 0.8 mm from this side of
needle hole of the feed dog to this side of needle at the position
where the top end of needle eyelet is aligned with the top
surface of feed dog and fix the needle rocker driving lever with
setscrew 2 in the needle rocker driving lever.
(Caution) To fix the needle rocker driving lever, lightly press
it to the right-side metal and fix it with setscrew 2
in the needle rocker driving lever.
6. Attach rubber cap 1 and return the feed amount to the proper
one.
™ When the adjustment value is
excessively small, needle comes
in contact with the feed dog and
breakage of components may
occur.
−13 −
(5) Adjusting the differential needle feed
Standard Adjustment
™ Remove cover 1 and packing 2 to adjust.
1
2
7
™ The center of three engraved marker dots is the standard.
5
3
6
4
−14 −
Adjustment Procedures Results of Improper Adjustment
1. Remove four setscrews 7 in adjusting slide cover 1 and
adjusting slide cover packing 2 in the rear of the machine
bed.
2. There are needle rocker lever 4 and needle rocker lever pin
5 in the rear of the cover packing which has been removed.
Loosen nut 3 fixing the lever pin.
(Caution) Do not loosen setscrew 6 in the needle rocker
lever.
3. There are three engraved marker dots in needle rocker lever
4. When the engraved marker dot of needle rocker lever pin
5 is adjusted to the upper engraved marker dot, the needle
rocking amount (differential feed ratio) in terms of the feed
amount of the feed dog is increased by +25%, and when it is
adjusted to the lower engraved marker dot, the needle rocking
amount is decreased by -5%.
(The engraved marker dot in the center is the standard, ±0%.)
4. Adjust the needle rocking amount in accordance with materials,
process and finish of sewing.
5. After the adjustment, fix nut 3 which has been loosened and
attach adjusting slide cover packing 2 and adjusting slide cover
1.
(Caution) If the needle rocking amount (differential feed ratio)
is changed, the clearance between spreader and
needle changes. Be sure to perform the adjustment
of clearance.
(Refer to the item “Adjusting the drawing amount of
the spreader” described in the Instruction Manual.)
™ If the needle rocking amount
(differential feed ratio) is
excessively increased, belt is
fed more.
It is effective to prevent belt from
waving.
™ If the needle rocking amount
(differential feed ratio) is
excessively decreased, belt is
expanded and sewn up.
−15 −
(6) Adjusting the timing between the needle and the looper
Standard Adjustment
™ Remove rubber cap 1.
4
1
™ Adjust the timing with adjusting screws 2.
4
7
Go
2
3
6
1
5
7
6
Back
A
1.8 ± 0.2 mm
B
1.8 ± 0.2 mm
−16 −
Adjustment Procedures Results of Improper Adjustment
™ When performing the adjustment of Timing between the needle
and the looper, start the adjustment after adjusting the sewing
pitch to that to be used.
1. Remove rubber cap 1.
2. Adjust the timing between the needle and the looper by
loosening and tightening two adjusting screws 2. When the
adjustment cannot be performed with two adjusting screws
2, loosen and temporarily tighten setscrews 3 in looper
eccentric and completely loosen two adjusting screws 2. Then
adjust the timing with setscrews 3 in the looper eccentric.
3. Adjust so that the looper passes the same positions A and B
(top end of looper is 1.8 ± 0.2 mm above from top end of needle
eyelet) of the needle 6 when the looper goes and back.
4. After the adjustment, fix setscrews 3 in the looper eccentric
and two adjusting screws 2. (Lightly press looper eccentric 5
to the right-side metal to fix it.)
5. Lastly, attach rubber cap 1. (Be sure to attach the rubber cap.
If you forget to attach rubber cap 1, oil leakage will be caused.)
(Caution) Do not remove looper eccentric cover 4 at the time
of adjustment. Oil leakage will be caused.
™ When go / back timing between
needle and looper is not proper,
stitch skipping or thread breakage
will be caused.
−17 −
(7) Adjusting the attaching angle of the looper
Standard Adjustment
™ Remove cylinder cover 1 and hinge 2.
1
2
3
™ Adjust attaching angle of loopers 4.
4
(Right side)
7
5
6
4
4
90 to 92˚
7
4
8
0 to 0.1 mm
Needle guard
−18 −
Adjustment Procedures Results of Improper Adjustment
1. Loosen three setscrews 3 and remove cylinder cover 1 and
hinge 2.
2. Adjust the angle of both of two (four) loopers 4 to 90˚ and
temporarily tighten setscrews 5 in the loopers.
3. Loosen setscrew 6 in the looper holder and move looper holder
7 to the direction (right side) where the top end of loopers 4
approaches the needle.
4. First, adjust the angle of looper 4 of which the top end comes
in contact with needle 8 to the direction of 92˚. (Adjust the
angle in the direction where the looper leaves the needle.)
5. Adjust looper holder 7 so that the clearances between the top
ends of remaining loopers 4 (1 or 3 loopers) and needles 8
are 0 to 0.1 mm respectively and fix setscrews 5 and 6 in the
loopers and the looper holder.
6. Adjust the angle of the looper of which the angle has been
adjusted to the direction of 92˚ so that the clearance between
the looper and needle 8 should be 0 to 0.05 mm, and fix looper
4.
(After the adjustment, attach cylinder cover 1 and hinge 2.)
™ If the angle of the looper becomes
larger (more than 92˚), the looper
and the loop deflector attached
to feed dog may come in conract
with each other.
™ If the angle of the looper becomes
smaller (less than 90˚), stitch
skipping may be caused when
the spreader catches looper
thread at the time of return of the
looper.
−19 −
(8) Adjusting the clearance between the needle and the needle guard
Standard Adjustment
1. Needle 1 comes in contact with needle guard 2 by 0 to 0.05 mm when needle 1 meets the top
end of the looper.
2
1
0 to 0.05 mm
2
3
−20 −
Adjustment Procedures Results of Improper Adjustment
1. Loosen setscrews 3 in the needle guards and turn needle
guards 2 to adjust the clearance.
After the adjustment, tighten setscrews 3 in the needle guards.
™ When the needle used is a new
one, but bent, adjust the needle
guard to make it slighly work so
that the top end of the looper
does not come in contact with
the needle even when replacing
the needle.
™ When adjusting the needle
guard, check again the position
and angle (clearance between
looper and needle) of the looper.
−21 −
(9) Adjusting the spreader
Standard Adjustment
™ Adjust spreader 5.
3
5
7
4
* Be sure to adjust the drawing amount of spreader 5 when making the stitch length more than 4 mm.
1) Adjusting the lateral position of the spreader
1
2
2) Adjusting the height of the top end of the spreader
2
0.1 to 0.4 mm
1
3) Adjusting the drawing amount of the spreader
1
1.6 to 1.8 mm
2
−22 −
Adjustment Procedures Results of Improper Adjustment
1) Adjusting the lateral position of the spreader
1. To adjust the lateral position of spreader 5, adjust so that the
top end of spreader pin 2 is positioned between the edge line
and the left side face of looper 1 when looper 1 comes to this
side most.
2. For the adjustment, loosen setscrews 4 in spreader base 3
and move spreader base 3 to the left or right (ba).
3. After the adjustment, tighten two setscrews 4 in spreader base
3.
Make sure that when the top end of the needle and the top end
of the spreader pin come to the same height when the needle
comes down, the clearance between the top end of the needle
and the left end (as observed from the front) of the spreader
pin is more than the width of the spreader pin.
2) Adjusting the height of the top end of the spreader
1. The standard value of the clearance between the top end of
spreader pin 2 and the top surface of looper 1 is 0.1 to 0.4
mm when the top surface of the looper comes close most.
2. Loosen two setscrews 4 in spreader base 3 and turn (arrow
mark ) spreader base 3 to adjust the height. After the
adjustment, tighten two setscrews 4.
™ If spreader goes excessively to
the right side, sticth skipping is
apt to occur or chain-off thread
is hard to come out when the
spreader catches looper thread.
™ If spreader goes excessively to
the left side, needle pierces
looper thread or stitch skipping
is apt to occur.
3) Adjusting the drawing amount of the spreader
1. Adjust so that the clearance between the needle and the
spreader pin should be 1.6 mm to 1.8 mm when the needle
comes down and the top end of the needle 6 is as high as the
top end of spreader pin 2.
2. Loosen setscrew 7 in the spreader and adjust the spreader to
and fro ( ).
c
d
After the adjustment, tighten setscrew 7 in the spreader.
(Caution) When stitch length is changed, the clearance of
1.6 to 1.8 mm changes. When the stitch length is
excessively changed, perform re-adjustment
accordingly.
(Perform the same adjustment when needle rocking
amount (differential feed ratio) is changed.)
−23 −
(10) Adjusting the spreader eccentric
Standard Adjustment
1
7
2
3
5
6
4
A
1 to 1.2 mm
−24 −
Adjustment Procedures Results of Improper Adjustment
Timing between the looper thread take-up and the needle
1. Remove setscrews 1 in the bed top cover and remove the top
cover and the cover packing. (7 setscrews)
2. Remove adjusting hole screw 3 under looper thread take-up
shaft 2.
(Insert a hexagonal wrench key from the adjusting hole and
adjust setscrew 4 in the eccentric.)
3. The timing between looper thread take-up and spreader, or
needle and looper changes by changing the position of marking
5 (screw No. 1 in the rotating direction 4) on the spreader
eccentric and marking 6 on the lower shaft.
(Standard adjustment) Adjust the marking 5 on the eccentric
to marking 6 located in the rear on the lower shaft.
4. Loosen setscrew 4 in the eccentric. If the marking is adjusted
to the front of the rotational direction, the timing of looper thread
take-up 7 and spreader in terms of needle and looper is
advanced.
5. For assembling after the adjustment, tighten setscrew 4 in the
eccentric at the position where the clearance A between the
spreader eccentric and the lower shaft bushing is 1 to 1.2 mm.
(Caution) 1. After this adjustment, be sure to adjust the
timing of needle, looper and spreader.
2. After adjusting the eccentric, timing of looper
thread take-up 7 changes. Adjust the timing and
change the looper thread tension as well.
™ In case of advancing timing :
1) When timing is advanced,
needle thread is tightened and
looper thread become balloon.
2) When timing is excessively
advanced, spreader comes in
contact with looper.
™ In case of delaying timing :
1) Needle thread cannot be
tightened and chain-off thread
dose not come out.
™ When the position of the marking
is changed, the stroke of the
spreader changes and the
sewing is affected.
6. After the adjustment, attach the bed top cover, cover packing
and adjusting hole screw 3.
(Apply sealant to the adjusting hole screw 3 for the remedy of
oil leakage.)
(Caution) Avoid an excessive change (exceeding the marking).
Component breakage will be caused.
−25 −
(11) Adjusting the thread tension of looper thread
Standard Adjustment
™ The standard adjustment position
1
2
3
4
™ How to change the thread tension of looper thread
1
U
X
D
2
3
4
Y
2
1
2 mm or more
5
(12) Adjusting the needle thread take-up
Standard Adjustment
™ The standard is that the dimension between the center of setscrews 1 and that of the needle
eyelets of needle thread take-up 2 is 11 to 13 mm.
1
11 to 13 mm
2
−26 −
Adjustment Procedures Results of Improper Adjustment
1. Turn the handwheel to bring the needle bar to its upper dead point.
2. Loosen setscrew 3 and adjust so that the slot section of looper
thread eyelet 2 is flush. Then temporarily tighten setscrew 3 at the
position of the center of slot.
3. Loosen setscrew 4 in looper thread take-up 1 and tighten setscrew
4 at the position where looper thread take-up 1 draws out thread
in the center of looper thread eyelet 2 as shown in the figure.
4. Make sure that looper thread eyelet 2 is aligned with the thread hole
of looper thread take-up 1 and tighten setscrew 3 in the looper
thread eyelet. (Before changing thread tension of looper thread, return
the looper thread take-up to the position of the aforementioned
adjustment and change the thread tension.)
5. When tightening looper thread in case of the change of thread tension,
move looper thread take-up 1 to the direction Y.
When releasing looper thread, move looper thread take-up 1 to the
direction X. Adjust looper thread eyelet 2 accordingly.
(Caution) When looper thread take-up 1 is excessively moved to
the direction Y, it comes in contact with pin 5 in the
thread take-up cover. Make the clearance 2 mm or more
accordingly.
™ When the looper thread eyelet is set
to the direction U, looper thread is
likely to be tightened and it is
effective against irregular stitches.
™ When the looper thread eylet is set
to the direction U, increase needle
thread tension since needle thread
is drawn out.
™ When the looper thread eyelet is set
to the direction D, looper thread is
likely to be loosened. However, do
not adjust it normally since irregular
stitches will be caused.
Adjustment Procedures Results of Improper Adjustment
1. Loosen setscrews 1 and adjust the installing position of needle thread
take-up 2 to 11 to 13 mm.
After the adjustment, tighten setscrews 1.
™ When the needle thread take-up is
lowered, needle thread is loosened.
™ When the needle thread take-up is
lifted, needle thread is tightened.
™ It is more effective to tighten thread
when the left needle thread takeup is lifted since the material on the
left needle side is thick.
−27 −
(13) Adjusting the loop deflector
Standard Adjustment
™ Remove feed dog 2 together with the feed dog holder using setscrew 5.
2
5
™ The clearance between loop deflector 3 of feed dog 2 and needle 1 should be 0.8 mm.
1
2
3
0.8mm
Wrong side of feed dog
4
23
0.8mm
™ Adjust so that section A of the top end of loop deflector 3 is placed at the position where it does
not protrude from needle 1.
2
3
−28 −
A
1
Adjustment Procedures Results of Improper Adjustment
1. Remove needle 1, presser foot and throat plate holder.
2. Remove feed dog 2 together with the feed dog holder using
setscrews 5.
3. Loosen and temporarily tighten setscrews 4 in the loop
deflector.
4. Attach feed dog 2 together with the feed dog holder using
setscrew 5.
5. Attach needle 1, turn the handwheel to bring the needle to its
lower dead point position and adjust so that section A of the
top end of loop deflector A is placed at the position where it
does not protrude from needle 1.
6. After the adjustment, remove feed dog 2 together with the
feed dog holder and tighten setscrews 4 in the loop deflector.
7. After fixing loop deflector 3, attach feed dog holder, throat plate
holder and presser foot.
−29 −
(14) Adjusting the height of the presser foot
Standard Adjustment
B
(Dimension : 0.1 to 0.5 mm)
A (9 mm or more)
5
4
3
1
1
2
−30 −
Adjustment Procedures Results of Improper Adjustment
1. Adjust presser lifter lever stopper screw 2 so that section A of
the height of presser foot is 9 mm or more (standard) when
presser lifter lever 1 is in the lowest position.
2. Loosen nut 3 of presser lifter lever stopper screw 2 and adjust
the height with presser lifter lever stopper screw 2.
3. After the adjustment, fix the height adjusting screw with nut 3.
4. In the state that the presser foot is lifted by 9 mm, make the
section B, clearance between collar 4 and presser bar bushing
5 0.1 to 0.5 mm.
−31 −
(15) Adjusting V072
1) Position of the upper feed roller
3
2
Upper feed roller pressure
adjusting screw
4
Standard Adjustment
1
A
32 mm
B
9
4
2) Adjusting the height of the lower roller
5
6
3) Vertical position of the roller
!2
!1
!4
!3
!0
8
7
10 to 11 mm
C (0.3 mm)
6 to 7 mm
−32 −
Adjustment Procedures Results of Improper Adjustment
1) Position of the upper feed roller
1. Remove upper feed roller cover, lever cover and upper feed roller
pressure adjusting screw.
2. Loosen setscrew 1 in the upper feed roller base, setscrew 2 in the
yoke guide and setscrew 3 in the yoke pin, and adjust so that the
gear section of the upper feed roller is parallel to the center core of
the lower roller shaft.
3. After determining parallel position A with setscrew 1 in the upper
feed roller base and setscrew 2 in the yoke guide, check that the
upper feed roller with roller presser spring 9 removed lightly moves
up or down. Then tighten setscrew 3 in the yoke pin. (Make sure
that the roller lightly moves up or down even after tightening the
setscrew.)
4. Loosen two setscrews 4 in the upper feed roller bracket and adjust
so that the gear section of the upper feed roller is parallel B to the
lateral height of the lower roller.
5. After the adjustment, check that the upper feed roller with roller presser
spring 9 removed lightly moves up or down. Then tighten setscrews
4 in the upper feed roller bracket.
6. Check that the roller lightly moves, and attach the cover, roller presser
spring and pressure adjusting screw. (Height of the pressure adjusting
screw is 32 mm.)
2) Adjusting the height of the lower roller (State that the upper
feed roller is lifted with upper feed roller lifting lever !2)
1. Loosen lock nut 6 of lower roller height adjusting nut 5.
2. Adjust the height of lower roller 8 to 10 to 11 mm from the top
surface of cylinder cover (upper) 7 using lower roller height adjusting
nut 5. (Perform the adjustment of the height to both of left and right
sides.
(Caution) The pressure of the left lower roller presure spring is
different from that of the right one.
Do not mistake when removing the springs.
(The spring on the left side as observed from the sewing
machine is a weak one.)
3) Vertical position of the roller
1. Remove the upper feed roller pressure adjusting screw and lower
the upper feed roller.
2. Loosen screw !0 in the upper feed roller presser bar bracket and
lower the roller to the lowest position. Loosen height adjusting screw
lock nut !3 and adjust the height with adjusting screw !4 so that the
clearance between periphery of upper feed roller lever sleeve !1 in
the upper feed roller presser bar bracket and cam section A of upper
feed roller lifting lever !2 should be approximately 0.3 mm.
After the adjustment, fix screw !4 with lock nut !3.
3. Press down the upper feed roller presser bar and tighten setscrew
!0 in the upper feed roller presser bar bracket at the position of the
part where the lower roller protrudes from the top surface of cylinder
cover (upper) is 6 to 7 mm when the upper feed roller presses the
lower roller. Make sure that the upper feed roller presser bar bracket
is parallel to the lower roller when tightening the setscrew.
(Caution) If the upper feed roller presser bar bracket is bent at the
time of installation, the upper feed roler may not go up
smoothly when lifting it with the upper feed roller lifting
lever.
−33 −
(15) Adjusting V072
Standard Adjustment
!0
1
A
0.5 mm
™ Adjusting clearances A and B portions
2
3
32 mm
B 0.5 mm
4) Adjusting feed amount of upper feed roller
6
5
4
U
D
7
Increase Decrease
9
−34 −
8
C
Adjustment Procedures Results of Improper Adjustment
<When up / down of the upper feed roller is not synchronized with up /
down of the presser foot>
4. Attach the pressure adjusting screw to the upper feed roller and tighten the
screw up to the height of 32 mm.
5. Lift the upper feed roller with upper feed roller lifting lever !0 and adjust the
slot position of upper feed roller lifting connecting plate 1. Loosen screw 3
in upper feed roller lifter (right) 2 and adjust so that the clearance of section
A between the top surface of the slot and the hinge screw should be 0.5
mm.
After the adjustment, tighten screw 3. (When performing this adjustment,
the upper feed roller does not go up sinchronously with the presser foot
even when the presser foot is lifted.)
<When up / down of the upper feed roller is synchronized with up / down
of the presser foot>
6. When lifting the upper feed roller synchronously with the presser foot, perform
the adjustment in the state that the upper feed roller is lowered.
7. Loosen screw 3 in upper feed roller lifter (right) 2 and adjust so that the
clearance of section B between the bottom surface of the slot of upper feed
roller lifting connecting plate 1 and the hinge screw should be 0.5 mm.
After the adjustment, tighten the screw 3.
™ This adjustment is used in case of the
continuous sewing.
4) Adjusting the feed amount of the upper feed roller
Adjust the momentum of the upper feed roller in accordance with the materials
used and sewing conditions.
1. Remove the upper feed roller cover.
2. Loosen nut 5 stopping upper feed roller lever pin 4 and set upper feed
roller lever pin 4 so that it is positioned in the center position of the slot of
upper feed roller lever 6 as the standard. After setting, tighten nut 5.
3. If the aforementioned adjustment is insufficient, adjust the position of upper
feed roller lever pin 4.
™ Direction U ..... Feed amount is decreased.
™ Direction D ..... Feed amount is increased.
4. After the adjustment, replace the upper feed roller cover.
5. When the feed amount is insufficient even after adjusting upper feed roller
lever pin 4, remove rubber cap 7 on the top cover. (Place the position of the
upper feed roller lever pin 4 to the center position of the engraved marker
dot before starting the adjustment. Then perform the adjustment.)
6. Turn the handwheel until setscrew 8 in the feed adjusting eccentric comes
to right above, and loosen setscrew 8 using the hexagonal wrench key.
7. Turn the handwheel until adjusting screw 9 comes to right above to adjust
the screw position.
8. Insert the hexagonal wrench key into adjusting screw 9 to adjust the feed
amount.
™ When the feed amount of the upper feed roller is desired to be increased
: Turn adjusting screw 9 counterclockwise.
™ When the feed amount of the upper feed roller is desired to be decreased
: Turn adjusting screw 9 clockwise.
9. When adjusting of the feed amount is completed, securely fix with setscrew
8.
™ When the feed amount of the upper
feed roller in terms of the needle feed
is not proper, needle breakage or stitch
skipping will be caused.
(Caution) 1. Avoid to excessively change the feed amount.
The feed amount exceeds the range of the slot of the upper
feed roller lever and re-adjustment is necessary.
2. Do not loosen two setscrews in the cam at section C except
8 and 9. Roler timing will change.
−35 −
(15) Adjusting V072
Standard Adjustment
5) Adjusting pressure of the cluch tension spring
4
2
3
1
−36 −
Adjustment Procedures Results of Improper Adjustment
5) Adjusting the pressure of the clutch tension spring
1. Loosen two setscrews 2 in collar 1 and temporarily tighten
them.
2. Turn adjusting screw 3 to adjust the pressure of clutch tension
spring 4.
When adjusting screw 3 is turned clockwise, the pressure is
increased.
When adjusting screw 3 is turned counterclockwise, the pressure is
decreased.
3. Adjust the pressure of clutch tension spring 4 to such an extent
that the screw is turned by pressing the spring with a finger.
4. After the adjustment, tighten two setscrews 2 in collar 1.
™ When the roller is replaced with
the iron one, reduce the sewing
speed to 3.500 rpm.
−37 −
4. LUBRICATION
(1) Replacing the lubricating oil
Standard Adjustment
1) Replacing time of the lubricating oil
™ In case of a new sewing machine, replace the lubricating oil after the machine has been used for
about 250 hours. Then replace the lubricating oil every 6 months.
2) Replacing procedure of the lubricating oil
1. Remove the belt cover. (See Instruction
Manual.)
2. Remove V belt from the motor pulley.
(See Instruction Manual.)
3. Remove the machine head from the sewing
machine table. (See Instruction Manual.)
4. Set a container to receive the lubricating oil
1
under drain screw 1.
5. Remove drain screw 1. The lubricating oil is
drained.
(Caution) Be careful that oil does not adhere to
V belt.
6. After the drain, replace the drain screw 1.
2
(Caution) 1. Be sure to supply lubricating oil to the portion between the two red lines of oil
Lubrication
3
gauge 3.
2. If the oil level is above the upper red line, oil leakage may occur.
3. If the oil level is below the lower red line, machine trouble will be caused.
7. Remove rubber cap 2 on which “OIL” is
indicated.
8. Supply new lubricating oil to the hole from which
rubber cap 2 has been removed up to the
upper red line of oil gauge 3.
• Oil used : JUKI New Defrix Oil No. 2
(Equivalent to ISO VG32)
• Oil amount : 900 mR
9. Attach rubber cap 2 after filling lubricating oil.
10. Set the machine head onto the sewing machine
table. (See Instruction Manual.)
11. Fit V belt to the motor pulley and attach the
belt cover. (See Instruction Manual.)
−38 −
(1) Replacing the lubricating oil
3) Inspecting and replacing the oil filter
1
2
3
Standard Adjustment
™ Normal lubrication cannot be performed if dust
collects in oil filter 1. Inspect it every 6 months.
<Inspecting/replacing procedure>
1. Remove oil filter cap 2, and draw out O ring
3 and oil filter 1.
2. When oil filter 1 is clogged with dust, replace
it with a new one.
(Caution) When removing oil filter cap 2 ,
lubricating oil collected in oil filter 1
will leak out. So, be careful.
−39 −
(2) Adjusting the oil amount
Standard Adjustment
™ Oil amount in the face plate section (Standard : 4,000 rpm) : Remove the face plate to check the oil
amount.
1. Insert a piece of paper inside the machine arm (in the rear of the presser spring), and judge the oil
amount from the oil mark adhered to the paper by splashing from the needle bar crank.
2. Measure the oil amount for five seconds, and the standard of the oil mark is the state as shown in
the illustrations below.
(Adjust the oil amount so that the width of oil mark is within 1 to 3 mm.)
Minimum width : 1 mm
1
Splashes
of oil
Splashes
of oil
Maximum width : 3 mm
4
−40 −
3
2
Adjustment Procedures Results of Improper Adjustment
1. Remove the top cover.
2. Adjust screw 1 (double screw) in the face plate oil amount
collar located at the left edge of upper shaft.
3. When the screw in the rear is loosened, oil amount in the face
plate section is increased and when it is tightened, oil amount
in the face plate section is decreased. (The oil amount does
not change immediately even when adjusting the oil amount.)
4. After the adjustment, check the oil amount in the face plate
section and tighten screw 1.
(Caution) When needle bar rod pin 3 is removed, do not
mistake the attaching direction of the pin since
there is a direction to attach the pin.
™ Attaching direction : There is a marking 2 on the flat section
of needle bar rod pin 3. Fix the needle bar rod pin with
setscrews 4 in the needle bar rod pin at the position where
marking 2 faces the center of upper shaft. In addition, when
tightening, equally tighten two setscrews 4.
™ When the oil amount in the face
plate section is excessively
decreased, machine seizure will
be caused.
™ When the marking cannot be
adjusted, machine seizure will
be caused.
™ When setscrews 4 in the needle
bar rod pin are not equally
tightened, the setscrews may be
loosened.
−41 −
5. SPECIAL SETTING OF SC-380
(1) Adjusting SC-380
Standard Adjustment
™Changing the setting of SC-380
1. To use for MH-1410, refer to “How to select the sewing machine head” in the Instruction Manual
for SC-380, and change the function to AXM1 (function name) “ ” (7 segment display) MH481, 482 (sewing machine model) in the program mode [2] (chainstitch sewing machine head).
2. Change the max. sewing speed to less than 5,000 rpm since the max. sewing speed of MH-481,
482 (sewing machine model) changed in the program mode [2] is 5,500 rpm.
In case of with cloth puller (V072), change the max. sewing speed to less than 4,000 rpm.
3. To change the max. sewing speed, refer to Engineer’s Manual and Instruction Manual for SC-380,
and change the speed with the program mode [P].
(Caution) When the sewing machine is used at max. sewing speed of 5,500 rpm without change,
machine trouble will be caused.
™Special setting (In case brake noise occurs when the sewing machine stops.)
1. It is effective to change GAIN setting [GA.] since the belt for MH-1410 is longer than that for the
normal sewing machine. (A mode)
2. Change the brake time setting when the sewing machine stops. (A mode) [BKT.]
* In case the situation is not improved, return the setting to the original one.
3. Change the effective of operation GAIN for the big inertia sewing machine to [HWG.] (K mode)
™Changing the thread trimming signal S2 prohibition
Phenomenon
1. When performing depressing and heeling the pedal repeatedly, lock of the thread trimming signal
works and there is a case where motor may not rotate even when the pedal is depressed.
Changing the setting
1. Change [S2L] the thread trimming signal S2 prohibition to ON with the P mode.
(Set value at the time of delivery is OF.)
2. Thread trimming operation and presser lifting operation after thread trimming by heeling or the
external thread trimming signal S2 are prohibited.
−42 −
Adjustment Procedures Results of Improper Adjustment
Adjusting procedure of the special setting
1. GAIN setting
A mode : [GA. L] → [GA. LL]
(How to enter A mode : [ ↓] + [A])
2. Brake time setting
A mode : [BKT. 14] → [BKT. 5]
3. Effective of operation GAIN
K mode : [HWG. OFF] → [HWG. ON]
(How to enter K mode : [ ↓] + [ ↑ ] + [A] + [C])
* K mode is the hidden mode.
−43 −
6. TROUBLES IN SEWING AND CORRECTIVE MEASURES
Troubles
Stitch skipping
Thread breakage
Chain-off thread
does not come out
well.
Needle breakage
Loose stitches
Irregular stitches
Lubricating oil
does not come out
from nozzle.
Causes (Items to be checked)
Check whether threading is wrong.
Check whether needle is bent or needle
tip is blunt.
Check whether thread tension is too high.
Check whether needle-to-looper or tospreader timing, or the clearance is
proper.
Check whether needle is too thin for
thread.
Check whether drawing amount of needle
thread is excessive.
Check whether drawing amount of looper
thread is excessive.
Needle attaching is improper. (Direction,
insufficient insertion)
Check whether thread is entangled in
thread eyelet, etc.
Check whether threading is wrong.
Check whether thread tension is too high.
Check whether thread is too thick for
needle.
Check whether quality of thread is not
good.
Check whether thread is cut from heat.
Check whether there are scratches on
thread eyelet, looper, thread take-up, etc.
When stitch length is changed, check
whether needle-to-looper, or to-spreader
timing is proper.
Check whether needle thread tension is
too high.
Check whether needle comes in contact
with looper.
Check whether needle comes in contact
with the needle hole in the feed dog.
Check whether needle comes in contact
with presser foot.
Check whether threading is wrong.
Check whether balance between needle
thread and looper thread is proper.
Check whether threading is wrong.
Check whether balance between needle
thread and looper thread is proper.
Check whether amount of lubricating oil
is below lower line of oil gauge.
Check whether oil filter is clogged with
dust.
Corrective measures
Properly pass the thread.
Replace the needle.
Decrease the thread tension.
Adjust needle-to-looper, or -to-spreader
timing, or the clearance between needle
and looper, or between needle and
spreader to a proper value.
Replace the needle to a proper one. Or,
replace the thread to a proper one.
Adjust the needle thread take-up to a
proper position.
Adjust the looper thread take-up to a
proper position.
Properly attach the needle.
Remove the thread entangled.
Properly pass the thread.
Decrease the thread tension.
Replace the needle to a proper one, or
replace the thread to a proper one.
Use a good quality thread.
Use the silicon oil lubricating unit.
Remove the scratch, or replace it with a
new one.
Adjust needle-to-looper, or -to-spreader
timing, or the clearance between needle
and looper, or between needle and
spreader to a proper value.
Decrease the needle thread tension.
Adjust the clearance between needle and
looper or needle guard to a proper value.
Adjust the longitudinal position of the
needle.
Adjust the position of the presser foot.
Properly pass the thread.
Re-adjust the balance of thread tension.
Properly pass the thread.
Re-adjust the balance of thread tension.
Supply the lubricating oil.
Replace the oil filter.
See Inst. Manual
P13
P12
P20 to 23
P12
P19
P26
P12
P13
P13
P12
P17
P20 to 25
P21 to 22
P12
P25
P13
P26
P13
P26
P9
P28
−44 −
−45 −
−46 −
7. DRAWING OF THE TABLE
(1) Top installation type
R30
4-ø3.4 on the bottom surface, depth 20
Installing position of stopper for drawer
100
Drawer installing
position
390
(Drill a hole at the time of set-up.)
(on the reverse side)
430
1200
810
3-8.5 drilled hole, ø26, depth 1
66±1
180 70
120
75
ø17 drilled hole
57±1159±1
Z
Y
Y
50
17
R
R
3-R20
R
Z
335
230
75
25
R30
60
360
570
R2
262.5 25
10
R6
40
R30
(21)
50 20
91
R2
R2
JUKI logotype
15
500
Detailed measurement (2 : 1)
Z-Z Y-Y (3 places)
10
30˚
25
(ø26)
11.5
0.57.5
7.5
11
1
0.80.8 1
5-R1
4-7 drilled hole
228
500
Top surface
Type : Helvetica Reg. Condensed
Condensed voided letters
Thickness : 1.5
195
2-ø3.4 on the bottom surface, depth 10
(Drill a hole at the time of set-up.)
280
120
R6
R30
40
40 11547.5
R2
40
R2
10
R2
R2
20
− 47−
(1)
(ø8.5)
7
120˚
5x200=1000
Thickness : 0.8
Thickness : 0.5
Thickness : 1.5
Table Part No. 31138803
(2) Semi-submerged type
1200
810 120
75
390
R30
4-ø3.4 on the bottom surface, depth 20
(Drill a hole at the time of set-up.)
Installing position of stopper for the drawer
100
(on the reverse side)
Drawer installing
position
360
430
280
230
199
148
R10
3-8.5 drilled hole, ø26, depth 1
66±1
R25
R5
302.5 25
159 ±1
R5
4-ø9 drilled hole, depth 16, facing 16
R
ø17 drilled hole
57±1
R10
25
50
R
R5
R25
Z
R10
ZYY
45
335
R5
R10
R5
R30
60
250
570
148
R2
(16)
10
R6
40
R30
(21)
R2
R2
X-X (4 places)
(ø16)
(ø9)
R10
R10
60
25
XX
Top surface
11.5
7
7.5
0.5
7.5
Detailed measurement (2 : 1)
11
1
0.80.8 1
5-R1
Type : Helvetica Reg. Condensed
Thickness : 1.5
120
15
JUKI logotype
20
50
91
Z-Z
5
30˚
35˚
(1)
500
Y-Y (3 places)
(ø26)
R5
R5
R25
47.5
228 280
165
500
Condensed voided letters
70
2-ø3.4on the bottom surface, depth 10
(Drill a hole at the time of set-up.)
R6
R30
40115
R2
30
R2
40
40
R2
10
R2
20
− 48−
(ø8.5)
120˚
5x200=1000
Thickness : 0.8
Thickness : 0.5
Thickness : 1.5
Table Part No. 31141203
R
High-speed, 2-Needle / 4-Needle, Needle-feed,
Double Chainstitch Cylinder-bed Machine
MH-1410
ENGINEER’S MANUAL
29349305
No.00
PREFACE
This Engineer’s Manual is written for the technical personnel who are responsible for the service and maintenance
of the machine.
The Instruction Manual for these machines intended for the maintenance personnel and operators at an apparel
factory contains operating instructions in detail. And this manual describes “Standard Adjustment”, Adjustment
Procedures”, “Results of Improper Adjustment”, and other important information which are not covered in the
Instruction Manual.
It is advisable to use the relevant Instruction Manual and Parts List together with this Engineer’s Manual when
carrying out the maintenance of these machines.
This manual gives the “Standard Adjustment” on the former page under which the most basic adjustment value
is described and on the latter page the “Results of Improper Adjustment” under which stitching errors and
troubles arising from mechanical failures and “How To Adjust” are described.
CONTENTS
1. SPECIFICATIONS ............................................................................................... 1
2. CONFIGURATION OF THE MACHINE COMPONENTS .................................... 2
3. STANDARD ADJUSTMENT ............................................................................... 4
(1) Timing between the upper shaft and the lower shaft ...................................................... 4
(2) Adjusting the height of the needle bar.............................................................................. 6
(3) Adjusting the feed dog ....................................................................................................... 8
1) Adjusting the lateral direction of the feed dog .................................................................................................. 8
2) Adjusting the longitudinal direction of the feed dog.......................................................................................... 8
3) Adjusting the height of the feed dog............................................................................................................... 10
4) Adjusting the tilt of the feed dog..................................................................................................................... 10
(4) Adjusting the longitudinal position of the needle feed ................................................. 12
(5) Adjusting the differential needle feed ............................................................................. 14
(6) Adjusting the timing between the needle and the looper ............................................. 16
(7) Adjusting the attaching angle of the looper ................................................................... 18
(8) Adjusting the clearance between the needle and the needle guard ............................ 20
(9) Adjusting the spreader ..................................................................................................... 22
1) Adjusting the lateral position of the spreader ................................................................................................. 22
2) Adjusting the height of the top end of the spreader ....................................................................................... 22
3) Adjusting the drawing amount of the spreader............................................................................................... 22
(10) Adjusting the spreader eccentric .................................................................................. 24
(11) Adjusting the thread tension of looper thread ............................................................. 26
(12) Adjusting the needle thread take-up ............................................................................. 26
(13) Adjusting the loop deflector .......................................................................................... 28
(14) Adjusting the height of the presser foot....................................................................... 30
(15) Adjusting V072 ................................................................................................................ 32
1) Position of the upper feed roller ..................................................................................................................... 32
2) Adjusting the height of the lower roller ........................................................................................................... 32
3) Vertical position of the roller........................................................................................................................... 32
4) Adjusting feed amount of opper feed roller .................................................................................................... 34
5) Adjusting pressure of the cluch tension spring............................................................................................... 36
4. LUBRICATION .................................................................................................. 38
(1) Replacing the lubricating oil ............................................................................................ 38
1) Replacing time of the lubricating oil ............................................................................................................... 38
2) Replacing procedure of the lubricating oil ...................................................................................................... 38
3) Inspecting and replacing the oil filter.............................................................................................................. 39
(2) Adjusting the oil amount .................................................................................................. 40
5. SPECIAL SETTING OF SC-380........................................................................ 42
(1) Adjusting SC-380 .............................................................................................................. 42
6. TROUBLES IN SEWING AND CORRECTIVE MEASURES ............................ 44
7. DRAWING OF THE TABLE .............................................................................. 47
(1) Top installation type ......................................................................................................... 47
(2) Semi-submerged type....................................................................................................... 48
R
INTERNATIONAL SALES H.Q.
8-2-1, KOKURYO-CHO,
CHOFU-SHI, TOKYO 182-8655, JAPAN
PHONE : (81)3-3430-4001 to 4005
FAX : (81)3-3430-4909 • 4914 • 4984
TELEX : J22967
Copyright C 2001 JUKI CORPORATION.
All rights reserved throughout the world.
Please do not hesitate to contact our distributors or agents in your area for further information when necessary.
＊ The description covered in this engineer's manual is subject to change for improvement of the
commodity without notice.
01 · 03 Printed in Japan (E)
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