Brother RH-9820 User manual

RH-9820
Please read this manual before using the machine.
Please keep this manual within easy reach for quick reference.
ELECTRONIC EYELET BUTTON HOLER
INSTRUCTION MANUAL

RH-9820
Thank you very much for buying a BROTHER sewing machine. Before using your new machine,
please read the safety instructions and the explanations given in the instruction manual.
With industrial sewing machines, it is normal to carry out work while positioned directly in front of
moving parts such as the needle and thread take-up lever, and consequently there is always a danger
of injury that can be caused by these parts. Follow the instructions from training personnel and
instructors regarding safe and correct operation before operating the machine so that you will know
how to use it correctly.

RH-9820 i
SAFETY INSTRUCTIONS
[1] Safety indications and their meanings
This instruction manual and the indications and symbols that are used on the machine itself are provided in order to ensure
safe operation of this machine and to prevent accidents and injury to yourself or other people.
The meanings of these indications and symbols are given below.
Indications
DANGER The instructions which follow this term indicate situations where failure to follow
the instructions may result in death or serious injury.
CAUTION The instructions which follow this term indicate situations where failure to follow
the instructions could cause injury when using the machine or physical damage
to equipment and surroundings.
Symbols
..……… This symbol ( ) indicates something that you should be careful of. The picture inside the triangle
indicates the nature of the caution that must be taken.
(For example, the symbol at left means “beware of injury”.)
..……… This symbol ( ) indicates something that you must not do.
..……… This symbol ( ) indicates something that you must do. The picture inside the circle indicates the
nature of the thing that must be done.
(For example, the symbol at left means “you must make the ground connection”.)

RH-9820
ii
[2] Notes on safety
DANGER
Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet
before opening the cover of the control box. Touching areas where high voltages are present can result in severe
injury.
CAUTION
Environmental requirements
Use the sewing machine in an area which is free
from sources of strong electrical noise such as
electrical line noise or static electric noise.
Sources of strong electrical noise may cause
problems with correct operation.
Any fluctuations in the power supply voltage should
be within ±10% of the rated voltage for the machine.
Voltage fluctuations which are greater than this may
cause problems with correct operation.
The power supply capacity should be greater than
the requirements for the sewing machine's power
consumption.
Insufficient power supply capacity may cause
problems with correct operation.
The pneumatic delivery capability should be greater
than the requirements for the sewing machine's total
air consumption.
Insufficient pneumatic delivery capability may cause
problems with correct operation.
The ambient temperature should be within the range
of 5°C to 35°C during use.
Temperatures which are lower or higher than this
may cause problems with correct operation.
The relative humidity should be within the range of
45% to 85% during use, and no dew formation
should occur in any devices.
Excessively dry or humid environments and dew
formation may cause problems with correct
operation.
In the event of an electrical storm, turn off the power
and disconnect the power cord from the wall outlet.
Lightning may cause problems with correct
operation.
Installation
Machine installation should only be carried out by a
qualified technician.
Contact your Brother dealer or a qualified electrician
for any electrical work that may need to be done.
The sewing machine weighs approximately 120 kg.
Installation of the sewing machine and adjustment of
the table height should be carried out by four or
more people.
Do not connect the power cord until installation is
complete. If this is not done, the sewing machine
may operate if the start switch is pressed by mistake,
which could result in serious injury.
Hold the machine head with both hands when tilting
it back or returning it to its original position.
In addition, do not subject the machine head to extra
force while it is tilted back.
If this is not observed, the machine head may
become unbalanced and fall over (together with the
table), and serious injury or damage to the sewing
machine may result.
Be sure to connect the ground. If the ground
connection is not secure, you run a high risk of
receiving a serious electric shock, and problems with
correct operation may also occur.
All cords should be secured at least 25 mm away
from any moving parts. Furthermore, do not
excessively bend the cords or secure them too firmly
with staples.
If this is not observed, fire or electric shocks may
result.
Install belt covers to the machine head.
If using a work table which has casters, the casters
should be secured in such a way so that they cannot
move.
Be sure to wear protective goggles and gloves when
handling the lubricating oil, so that it does not get
into your eyes or onto your skin.
If care is not taken, inflammation can result.
Furthermore, do not drink the lubricating oil. Diarrhea
or vomiting may result.
Keep the oil out of the reach of children.

RH-9820 iii
CAUTION
Sewing
This sewing machine should only be used by
operators who have received the necessary training
in safe use beforehand.
The sewing machine should not be used for any
applications other than sewing.
Be sure to wear protective goggles when using the
machine.
If goggles are not worn, there is the danger that if a
needle breaks, parts of the broken needle may enter
your eyes and injury may result.
Turn off the power switch at the following times. If
this is not done, the sewing machine may operate if
the start switch is pressed by mistake, which could
result in serious injury.
•When threading the needle
•When replacing the needle
•When not using the machine and when leaving the
machine unattended
If using a work table which has casters, the casters
should be secured in such a way so that they cannot
move.
Attach all safety devices before using the sewing
machine. If the machine is used without these
devices attached, injury may result.
Do not touch any of the moving parts or press any
objects against the machine while sewing, as this
may result in personal injury or damage to the
machine.
If an error occurs in machine operation, or if
abnormal noises or smells are noticed, immediately
turn off the power switch. Then contact your nearest
Brother dealer or a qualified technician.
If the machine develops a problem, contact your
nearest Brother dealer or a qualified technician.
Cleaning
Turn off the power switch before carrying out this
operation. If this is not done, the sewing machine
may operate if the start switch is pressed by mistake,
which could result in serious injury.
Be sure to wear protective goggles and gloves when
handling the lubricating oil, so that it does not get into
your eyes or onto your skin.
If care is not taken, inflammation can result.
Furthermore, do not drink the lubricating oil. Diarrhea
or vomiting may result.
Keep the oil out of the reach of children.
Maintenance and inspection
Maintenance and inspection of the sewing machine
should only be carried out by a qualified technician.
Ask your Brother dealer or a qualified electrician to
carry out any maintenance and inspection of the
electrical system.
Turn off the power switch and disconnect the power
cord at the following times. If this is not done, the
sewing machine may operate if the start switch is
pressed by mistake, which could result in serious
injury.
•When carrying out inspection, adjustment and
maintenance
•When replacing consumable parts such as the
loopers and knife
Disconnect the air hoses from the air supply and wait
for the needle on the pressure gauge to drop to “0”
before carrying out inspection, adjustment and repair
of any parts which use the pneumatic equipment.
Hold the machine head with both hands when tilting
it back or returning it to its original position.
In addition, do not subject the machine head to extra
force while it is tilted back.
If this is not observed, the machine head may
become unbalanced and fall over (together with the
table), and serious injury or damage to the sewing
machine may result.
If the power switch and air need to be left on when
carrying out some adjustment, be extremely careful
to observe all safety precautions.
Use only the proper replacement parts as specified
by Brother.
If any safety devices have been removed, be
absolutely sure to re-install them to their original
positions and check that they operate correctly
before using the machine.
Any problems in machine operation which result
from unauthorized modifications to the machine will
not be covered by the warranty.

RH-9820
iv
[3] Warning labels
The following warning labels appear on the sewing machine.
Please follow the instructions on the labels at all times when using the machine. If the labels have been
removed or are difficult to read, please contact your nearest Brother dealer.
1 2
3 Do not touch the knife or press any
objects against the machine while
sewing, as this may result in personal
injury or damage to the machine.
Safety devices
Devices such as eye guard, finger guard,
needle bar guard, needle guide cover and
belt cover
4
Be careful not to get your hands
caught when returning the machine
head to its original position after it
has been tilted.
5 Be careful not to get your hands caught
when moving the feed base backward.
6 Be sure to connect the ground. If the
ground connection is not secure, you
run a high risk of receiving a serious
electric shock, and problems with
correct operation may also occur.
7 Direction of operation
8High temperature warning display
Eye guard
Finger guard
Needle guide cove
r
Needle bar guard
0534B
0330B
0302B

RH-9820 v
Belt cover
(Rear)
0331B
0332B
0334B
0486B
0485B
0333B

RH-9820
CONTENTS
1. NAMES OF MAJOR PARTS................. 1
2. MACHINE SPECIFICATIONS............... 2
2-1. Specifications .............................................. 2
2-2. Sewing shapes............................................ 3
3. INSTALLATION .................................... 4
3-1. Table processing diagram........................... 4
3-1-1. When setting up on top of the table ..... 5
3-1-2. When embedding into the table ........... 6
3-2. Installing the control box ............................. 7
3-3. Installing the table reinforcement plates
(embedded installation only) ....................... 8
3-4. Installing the machine head ........................ 8
3-4-1. When setting up on top of the table ..... 8
3-4-2. When embedding into the table ......... 10
3-5. Tilting back and returning the machine
head .......................................................... 11
3-6. Installing the belt cover and feed bar
cover U...................................................... 12
3-7. Installing the oiler ...................................... 12
3-8. Installing the operation panel .................... 13
3-9. Installing the cotton stand ......................... 13
3-10. Installing the air unit and valve unit ........... 14
3-11. Installing the 2-pedal foot switch
(when using the 2-pedal foot switch)......... 14
3-12. Installing the treadle unit
(when using the treadle)............................ 15
3-12-1. When setting up on top of the table ... 15
3-12-2. When embedding into the table ......... 15
3-13. Installing the hand start switch
(when using the hand start switch)............ 16
3-14. Connecting the cords ................................ 18
3-14-1. Connecting the connectors inside
the control box ................................... 18
3-14-2. Connecting the ground wire ............... 22
3-14-3. Connecting the power cord ................ 23
3-14-4. Connecting the air tubes .................... 24
3-14-5. Securing the cords ............................. 24
3-15. Installing the air hose ................................ 25
3-16. Adjusting the air pressure ......................... 25
3-17. Installing the eye guard ............................. 26
3-18. Setting the scrap holder for the knife ........ 26
3-19. Installing and removing the work clamp
plates ........................................................ 27
3-20. Lubrication................................................. 28
3-20-1. Adding oil ........................................... 28
3-20-2. Lubrication ......................................... 29
4. PREPARATION BEFORE SEWING ... 30
4-1. Installing the needle...................................30
4-2. Threading the upper thread .......................31
4-3. Threading the lower thread........................32
4-4. Threading the gimp....................................33
4-5. Threading the threads when the cotton
stand is installed on the right side..............34
4-6. Setting the material....................................35
5. USING THE SEWING MACHINE
(OPERATION PANEL: BASIC
OPERATION) ...................................... 36
5-1. Name and function of each operation
panel item ..................................................36
5-2. Starting the sewing machine......................38
5-3. Program setting method ............................39
5-3-1. Parameter list .....................................41
5-4. Checking the sewing pattern in test
mode..........................................................46
5-5. Switching cutting operation........................48
5-6. Changing the material setting position.......49
5-7. Using threading mode ...............................50
6. USING THE SEWING MACHINE
(SEWING OPERATION) ..................... 51
6-1. Automatic sewing (automatic mode)..........51
6-2. Using the STOP switch..............................52
6-2-1. Pausing sewing during automatic
sewing ................................................52
6-2-2. Canceling manual sewing or test
feeding................................................54
6-3. Adjusting the thread tension ......................55
7. USING THE SEWING MACHINE
(OPERATION PANEL: ADVANCED
OPERATION) ......................................57
7-1. Using cycle programs ................................57
7-2. Setting memory switches...........................60
7-2-1. List of memory switch settings............61
7-3. Resetting the data (initialization)................62
7-4. Changing the production counter setting ...63
7-5. Displaying the help screen.........................64
7-6. Manual sewing (manual mode)..................65
7-7. Switching the sewing mode while sewing
is in progress .............................................67

RH-9820
8. CLEANING AND INSPECTION ...........68
8-1. Daily cleaning and inspection.................... 68
8-1-1. Cleaning............................................. 68
8-1-2. Checking the air filter ......................... 69
8-1-3. Checking the needle .......................... 69
8-2. Monthly cleaning and inspection ............... 69
8-2-1. Cleaning the control box air inlet
port..................................................... 69
8-3. Cleaning and inspection as required......... 70
8-3-1. Draining lubricating oil........................ 70
8-3-2. Cleaning the eye guard...................... 70
8-3-3. Lubrication ......................................... 70
8-3-4. Draining water.................................... 70
9. STANDARD ADJUSTMENTS..............71
9-1. Adjusting the heights of the spreaders
and loopers ............................................... 71
9-2. Adjusting the zigzag width (stitch width).... 72
9-3. Adjusting the zigzag base line position ..... 73
9-4. Adjusting the needle and looper timing ..... 76
9-5. Adjusting the looper stroke........................ 77
9-6. Adjusting the height of the needle bar....... 78
9-7. Adjusting the clearance between the
loopers and needle.................................... 79
9-8. Adjusting the needle guard ....................... 79
9-9. Adjusting the spreader installation
positions.................................................... 80
9-10. Adjusting the spreader timing.................... 81
9-11. Adjusting the height of the throat plate...... 82
9-12. Changing the cutting length
(Replacing the hammer)............................ 83
9-13. Adjusting the cutting surface of the
hammer..................................................... 84
9-13-1. Filing the cutting surface of
the hammer........................................ 84
9-13-2. Adjusting the contact between
the knife and the hammer .................. 85
9-14. Adjusting the axial play of the hammer ..... 85
9-15. Making the cutter driving shaft and driving
shaft presser move together ..................... 86
9-16. Replacing the knife and adjusting its
position...................................................... 87
9-16-1. Replacing the knife ............................ 87
9-16-2. Making fine adjustments to the knife
position............................................... 88
9-17. Adjusting the cutting pressure ...................90
9-18. Adjusting the work clamp lift amounts .......91
9-19. Adjusting the work clamp positions............92
9-20. Adjusting the positions of the work clamp
plates .........................................................93
9-21. Adjusting the cloth opening amounts.........94
9-22. Adjusting the upper thread feeding
amount.......................................................95
9-23. Adjusting the lower thread feeding
amount <-01 specifications only> ..............96
9-24. Replacing and adjusting the upper
movable knife ............................................96
9-24-1. Replacing the upper movable knife ....96
9-24-2. Adjusting the upper movable knife .....97
9-24-3. Adjusting the position of the thread
trimmer lever bracket..........................98
9-25. Replacing and adjusting the movable
knife and fixed knife (for the lower thread
and gimp) <-01 specifications>..................99
9-25-1. Replacing the movable knife and
fixed knife ...........................................99
9-25-2. Adjusting the cutting pressure ..........100
9-25-3. Adjusting the meshing amount .........100
9-25-4. Adjusting the thread nipper
assembly and opener .......................101
9-25-5. Adjusting the thread handler.............103
9-26. Replacing and adjusting the movable
knife and fixed knife (for the lower thread
and gimp) <-02 specifications>................104
9-26-1. Replacing the movable knife and
fixed knife .........................................104
9-26-2. Adjusting the cutting pressure ..........104
9-26-3. Adjusting the movable knife
installation position ...........................105
9-26-4. Adjusting the position of the sub
clamp................................................106
9-27. Adjusting the gimp trailing length
<-02 specifications only> .........................107
9-28. Adjusting the position of the lower thread
presser <-02 specifications only> ............108
10. ERROR CODES ...............................109
11. TROUBLESHOOTING .....................114

RH-9820
1. NAMES OF MAJOR PARTS
1
1. NAMES OF MAJOR PARTS
The accessory switches shown below to use for starting the sewing machine will vary depending on the destination.
(1) Power switch (7) 2-pedal foot switch
(2) Control box (8) Hand start switch
(3) CF slot* (9) STOP switch
(4) Operation panel (10) Upper shaft pulley
(5) Treadle unit (11) Feed base
(6) Treadle (commercially-available) (12) Cotton stand
Safety devices:
(13) Finger guard (16) Needle guide cover
(14) Eye guard (17) Belt cover
(15) Needle bar guard
*: CFTM is a trademark of SanDisk Corporation.
0335B

RH-9820
2. MACHINE SPECIFICATIONS
2
2. MACHINE SPECIFICATIONS
2-1. Specifications
Lower thread trimmer
Thread trimmer Long type Short type
-00 O - -
-01 O O -
-02*1O - O
*1: -02 specifications are divided into L1422 to L3422 specifications
depending on the sewing lengths, so please specify the sewing
length when ordering.
*2: This is not covered by specification designations, but compatibility
is possible by replacement of gauge parts. (Ask the place of
purchase for details.)
SPECIFICATIONS RH-9820-00 RH-9820-01 RH-9820-02
Use Men’s clothes, ladies’ clothes Jeans and work clothes
Sewing speed 1,000 - 2,500 rpm (Setting possible in units of 100 rpm)
Sewing shape
Without bartack
Taper bartack
Straight bartack
Round bartack
Circular stitch
Without bartack
Taper bartack
Straight bartack
Round bartack
Circular stitch
Without bartack
Taper bartack
Straight bartack
Round bartack
Sewing length 5 - 50 mm 5 - 42 mm
L1422: 14 - 22 mm *2
L1826: 18 - 26 mm
L2230: 22 - 30 mm
L2634: 26 - 34 mm *2
L3442: 34 - 42 mm *2
Stitch pitch 0.5 - 2.0 mm
Zigzag width 1.5 - 5.0 mm (Max. 4.0 mm with mechanism, Max. 1.0 mm with software)
Taper bartack length 0 - 20 mm
Work clamp height Standard 12 mm (up to 16 mm possible) 16 mm
Starting method Foot switch (treadle type, 2-pedal type) or hand start switch
Feed mechanism Intermittent feed by three pulse motors (X, Y, θ)
Needle DO x 558 80 - 120 Nm (Schmetz 558)
Safety devices Built-in emergency stop function and automatic stopping device which stops the machine when the
safety circuit is activated
Upper shaft motor AC servo motor (4-pole, 550 W)
Air pressure Main regulator: 0.5 MPa
Hammer pressure regulator: 0.4 MPa
Air consumption 43.2 l/min (8 cycles/min)
Power supply Single-phase 100V/220V, Three-phase 200V/220V/380V/400V 400 VA
Weight Machine head: Approx. 120 kg, Operation panel: Approx. 0.6 kg
Control box: 14.2 - 16.2 kg (Varies depending on destination)

RH-9820
2. MACHINE SPECIFICATIONS
3
2-2. Sewing shapes
Eyelet buttonhole
Without bartack Taper bartack Straight bartack Round bartack
Straight buttonhole
Without bartack Taper bartack Straight bartack Round bartack
Circular stitch
0536B-0539B
0540B-0543B
0544B

3. INSTALLATION
RH-9820 4
3. INSTALLATION
CAUTION
Machine installation should only be carried out by a
qualified technician.
Contact your Brother dealer or a qualified electrician
for any electrical work that may need to be done.
The sewing machine weighs approximately 120 kg.
Installation of the sewing machine and adjustment of
the table height should be carried out by four or more
people.
Do not connect the power cord until installation is
complete. If this is not done, the sewing machine may
operate if the start switch is pressed by mistake, which
could result in serious injury.
Hold the machine head with both hands when tilting it
back or returning it to its original position.
In addition, do not subject the machine head to extra
force while it is tilted back. If this is not observed, the
machine head may lose balance and fall over
(together with the table), and injury or damage to the
sewing machine may result.
All cords should be secured at least 25 mm away from
any moving parts. Furthermore, do not excessively
bend the cords or secure them too firmly with staples.
If this is not observed, there is the danger that fire or
electric shocks could occur.
Be sure to connect the ground.
If the ground connection is not secure, you run a high
risk of receiving a serious electric shock, and
problems with correct operation may also occur.
Install the safety covers to the machine head and
motor.
3-1. Table processing diagram
• Use a table with legs which is strong enough to bear the weight of the sewing machine (120 kg) and which can also
withstand vibration. Use a table with a top thickness of 49 - 60 mm.
NOTE:
If the thickness of the table exceeds 60 mm, the accessory bolts and the cables coming from the machine head may not
be long enough.
• If using casters, use ones which can bear the total weight of sewing machine and table.
• Check that the control box is at least 10 mm away from the leg. If the control box and the leg are too close together, it may
result in incorrect sewing machine operation.
• The method of processing the table varies depending on whether the machine head is sitting on the table or embedded into
the table. Refer to the processing diagrams for each respective setting-up method and drill the holes as appropriate.

3. INSTALLATION
RH-9820
5
3-1-1. When setting up on top of the table
0338B
For control box
2 x 4 mm dia.
20 depth
(From underneath
table)
For valve unit
For cotton stand
2 x 4 mm dia. 20 depth
(from underneath table)
For
p
neumatic unit
For cords
For treadle unit
For table le
g
For oiler
For bed base
For provisionally holding
bed base
Melamine veneer
p
anel
2 x 2 mm dia. 10 depth
(from underneath table)
For power switch
4 x 2 mm dia. 10 depth
For operation panel
For o
p
eration
p
anel cord
For cords
Φ50

3. INSTALLATION
RH-9820 6
3-1-2. When embedding into the table
When embedding the machine head into the table, some extra components will be required, so contact the place of purchase
for further details.
NOTE:
When embedding the machine head into the table, be sure to install the L-shaped table reinforcement plates. (Refer to “3-3.
Installing the table reinforcement plates (embedded installation only)”.)
0339B
For control box
4 x 4 mm dia.
20 depth
(From underneath
table)
For valve unit
For cotton stand
For pneumatic unit
Shaded area should
be C10
For table le
g
Melamine veneer
p
anel
2x 2mm dia. 10 depth
(from underneath
table)
For power switch
For operation panel
4 x 2 mm dia. 10 depth
For o
p
eration
p
anel cord
For bed su
pp
ort
p
late
For L-sha
p
ed reinforcement
p
lates

3. INSTALLATION
RH-9820
7
3-2. Installing the control box
CAUTION
Before installing the control box, take steps to make sure that the control box does not fall down.
If this is not done, injury to feet or damage to the control box may result.
Before installing the control box (1),
check that the model plate (2) on the
control box (1) is “RX9820” to indicate
that it is an RX-control box for RH-9820
sewing machines.
(1) Control box
(3) Bolts [4 pcs.]
(4) Plain washers [4 pcs.]
(5) Nuts [8 pcs.]
NOTE:
Check that the control box (1) is at
least 10 mm away from the leg. If
the control box (1) and the leg are
too close together, it may result in
incorrect sewing machine
operation.
10mm or more
Leg
(6) Power switch
(7) Screws [2 pcs.]
(8) Staples [5 pcs.]
* Use the remaining two staples to
secure the power cord (9) in a
position that matches the position
of the wall outlet.
NOTE:
Take care when tapping in the
staples (8) to make sure that they
do not pierce the power cord (9).
0341B
Operator
Operator
0404B
0340B

3. INSTALLATION
RH-9820 8
3-3. Installing the table reinforcement plates (embedded installation only)
(1) L-shaped reinforcement plates
[2 pcs.]
(2) Bolts [10 pcs.]
(3) Plain washers [10 pcs.]
(4) Spring washers [10 pcs.]
(5) Nuts [10 pcs.]
3-4. Installing the machine head
3-4-1. When setting up on top of the table
<Only when using the treadle>
Before installing the machine head, install the three treadle
mounting bolts (A) to the table.
* Insert the bolts (A) securely so that their heads do not
protrude out from the top of the table.
(Refer to “3-12. Installing the treadle unit (when using the
treadle)”.)
Table
(Continued on next page)
0342B
0343B

3. INSTALLATION
RH-9820
9
CAUTION
Always be sure to install the stopper bolt before tilting back the machine head in step 4 below. If this is not done, the
machine head will tip over and fall down, and injury or damage to the machine head may result.
1. Check that the four bed base
cushions (1) have all been installed
to the bottom of the bed base, and
then place the machine head onto
the table.
NOTE:
• When placing the machine head
onto the table, have four or more
people hold the machine head by
the places indicated by the four
locations in the illustration.
• Do not hold by the head support
lever (2).
2. Use one of the four bolts (3) and a
plain washer (4) to provisionally
secure the bed base to the table
from underneath the table.
3. After provisionally securing the bed
base, remove the fixing bolt (5) and
washer (6).
4. Tilt back the machine head, and
then install the remaining three of
the four bolts (3) to the other three
places in the bed base. (Refer to
“3-5. Tilting back and returning the
machine head” for details on tilting
back the machine head.)
(7) Washers [4 pcs.]
(8) Rubber sheets [4 pcs.]
(9) Washers (large) [4 pcs.]
(10) Nuts [4 pcs.]
NOTE:
Do not over tighten the bolts (3)
so much that a gap is produced
between the table and the bed
base.
5. Remove the bolt (3) and washer (4)
that were used to provisionally
secure the bed base, and install
them to the one remaining location.
NOTE:
The fixing bolts (5) and washers (6)
are needed when moving the
machine head, so store them in a
safe place.
gap
0344B
0345B
0346B
(rear)
Provisionally
secure
Provisionally
secure

3. INSTALLATION
RH-9820 10
3-4-2. When embedding into the table
(1) Bed support plates [4 pcs.]
(2) Bolts [16 pcs.]
* Install so that they are horizontal to
the bed base.
NOTE:
• When placing the machine head
onto the table, have four or more
people hold the machine head by the
places indicated by the locations
in the illustration.
• Do not hold by the head support
lever (3).
(4) Rubber sheets [4 pcs.]
(5) Bolts [4 pcs.]
(6) Washers (large) [4 pcs.]
(7) Nuts [4 pcs.]
After installing the machine head,
remove the fixing bolts (8) and washers
(9).
NOTE:
The fixing bolts (8) and washers (9)
are needed when moving the
machine head, so store them in a
safe place.
0347B
0348B
0349B
(rear)

3. INSTALLATION
RH-9820
11
3-5. Tilting back and returning the machine head
CAUTION
Hold the machine head with both hands when tilting it back or returning it to its original position.
In addition, do not subject the machine head to extra force while it is tilted back. If this is not observed, the machine
head may lose balance and fall over (together with the table), and injury or damage to the sewing machine may result.
Do not hold the feed base (2) and the feed guide shaft (3). If this is not observed and the feed base (2) or feed guide
shaft (3) come off, the machine head may fall down and injury or damage to the machine head may result.
The machine head can be tilted back and returned to one of two heights.
NOTE:
Always be sure to turn off the power switch before tilting back and returning the machine head.
Tilting back the sewing machine head
1. Hold the bed (1) at both sides (at the places indicated by
in the illustration) with both hands.
2. To tilt back to the first step:
Gently lift up the machine head until the head support
lever (4) securely engages section A of the hinge support
shaft (5) (until a click is heard).
3. To tilt back to the second step:
Remove the head support lever (4) from section A of the
hinge support shaft (5), and then gently lift up the
machine head until the head support lever (4) securely
engages section B.
NOTE:
The machine head will be momentarily stopped by the
gas spring (6) immediately before it rises to the
second step, but it will not be locked at this point. Lift
the machine head until the head support lever (4)
securely engages section B of the hinge support shaft
(5).
CAUTION
Be sure to check that the head support lever (4)
and the hinge support shaft (5) are engaged. If
they are not engaged, the machine head may
suddenly return to its original position and injury
may result.
<Returning the machine head to its original position>
1. To return the machine head from the second step:
After lifting up the machine head, remove the head support lever (4) from section B of the hinge support shaft (5), and then
hold the bed at both sides and gently return it to its original position.
* The machine head will start returning until the gas spring (6) starts to operate, so support the machine head securely
with both hands.
* When the machine head is returned to the first step, the head support lever will lock onto section A.
2. To return the machine head from the first step:
After gently lifting up the machine head, remove the head support lever (4) from section A of the hinge support shaft (5),
and then hold the bed at both sides and gently return it to its original position.
0352B
First step
Second step