Mikasa MGX-23 User manual

2146#$.'8+$4#614
ᾜᵥᾧᵋᵐᵑᵍᵐᵖᵍᵑᵐᵍᵑᵖᴾ
ᵭᵮᵣᵰᵟᵲᵧᵭᵬᴾᵫᵟᵬᵳᵟᵪ
Thank you for purchasing MIKASA PORTABLE
VIBRATOR.
For
safe and correct use of the product, please
read this
manual beforehand.
After reading, please keep this manual for future
reference.
&QWDNGKPUWNCVKQP

TABLE OF CONTENTS
1. Introduction
2. Use of Machine, warning, structure and power transmission
3. Warning signs
4. Cautions for safety
5. Appearance
6. Concrete casting
7. Maintenance and storage
2-1 Use of machine
2-2 Warning for incorrect applications and incorrect uses
2-3 Structure
2-4 Power transmission
2-5 Double insulation
4-1 General cautions
4-2 Cautions before work
4-3 Cautions during work
4-4 Cautions for maintenance
4-5 Labeling position
4-6 Descriptions of symbols used on safety label
5-1 Outline drawing (dimension and name of each part)
5-2 Specification
............................................................................................. 2
................. 2
......................................................................................... 3
.................................................................................. 3
......................................................................................... 7
................................................................................... 7
..................................................................... 8

1. Introduction
䖃䖃䖃
2
This instruction manual describes the correct operation method of MGX portable vibrator and its easy
inspection and maintenance. To enhance your work efficiency and to make your work more effective,
please read this manual before using the vibrator.
After you finish reading, please keep this manual at hand so that you can refer to it whenever necessary.
For repair parts, parts lists, service manuals and repair requests, please contact your distributor, our sales
office or Mikasa Parts Service Center.
Parts lists are also available at our homepage, MIKASA website, at http://www.mikasas.com.
The illustrations in this instruction manual might differ in part from the actual product due to design change,
etc.
2. Use of machine, warning, structure and power transmission
2-1. Use of machine
2-2. Warning for incorrect applications and incorrect uses
2-3. Structure
2-4. Power transmission
2-5. Double insulation
Portable vibrator is for concrete compaction.
During concrete casting, insert the vibrating end of this machine into the concrete. Gap will be eliminated
from the concrete filled in the form, and the air bubbles contained in the concrete will be removed, which
results in nice-looking well compacted concrete finish of high strength.
Concrete casting in an area deep down the ground or anywhere far from the power source can be done
easily by extending the cord. Because this vibrator is small and light, long work and machine handling can
be done easily and safely.
Do not use this vibrator for purposes other than concrete compaction. Also, do not remove the shaft to alter
the motor and shaft to use them for other applications.
To prevent the risk of electrification, make sure to use a breaker at the power source.
Do not hold the vibrating head and the vibrating area near the vibrating head while you work. There is a
risk of vibration induced disease.
The portable vibrator consists of commutator motor part, vibration generating end part and flexible
hose/flexible shaft part that connects the commutator motor to the vibration generating end. The
combination of flexible hose/shaft part and motor part can be changed to meet the needs of each specific
application.
The electricity from the power source runs the commutator motor. Via the flexible shaft, the motor running
at high speed rotates the eccentric rotor, which makes the vibrating head to vibrate for concrete
compaction.
A switch is used to turn on and off the commutator motor.
This vibrator is marked with a “ ” symbol because two insulators are used as double insulation between
the electricity conducting part and the outside frame that comes into contact with people.
Double insulation tools are highly safe against electrification.
If the existing part is replaced with a different part, or when the parts are assembled incorrectly, double
insulation structure will be lost, and the vibrator might become unsafe to operate.
For disassembly/assembly of electric system and parts change or repair, please contact your distributor.

3. Warning signs
䟿䟿䟿
3
This manual explains the operation method of MGX Type Portable Concrete Vibrators. Please work safely
with our product by reading this manual and fully understanding the content.
The ( ) mark used in this manual and the safety label on the machine are warning signs. For your
safety, please follow the rule of warning signs.
Each ( ) warning sign represents danger to people as shown below.
DANGER:
䟿
WARNING:
䟿
CAUTION:
䟿
Extremely dangerous if the instruction is not followed, resulting in
potential accident of death or serious injury.
Danger exists if the instruction is not followed, resulting in potential
accident of death or serious injury.
Potential for danger exists if the instruction is not followed, resulting
in injury accident.
Caution(Nomark):Potentialforphysicaldamageiftheinstructionisnotfollowed.
4. Cautions for safety
4-1 General cautions
䚷 Do not work if one of the following conditions exists.
䕿䕿䕿䚷
Work in proper work clothes.
䕿䕿䕿䚷
Please wear noise suppressing device.
䕿䚷
Check the machine carefully to make sure there is
no breakage, crack or deformation.
䕿
WARNING
䟿
Your body condition is not good because of overwork
or illness.
When you are under the influence of some medication.
When you are drinking.
CAUTION
䟿
Read the operation manual well and work safely
by taking correct steps of operation.
䚷
Prevent the operation of the machine by someone
who does not have sufficient knowledge of
operation.
䕿
Always use protective gear (helmet, protective
goggles, safety shoes, anti-vibration gloves, etc.) for
safe operation of the machine, and wear appropriate
work clothe.
For outdoor work, rubber gloves and slip-resistant
shoes are recommended.
Long hair should be covered with a cap or hair cover.
When doing work that generates high level of noise,
wear noise suppressing devices such as ear plugs or
ear muffs.
Check also the cabtyre cord to make sure the
conducting part is not exposed due to wear or crack.
As the cabtyre cord wears relatively quickly, please
replace with a new one at early timing. Also check the
power outlet and the plug for breakage, deformation,
burn or damage at the cord connection area.

4-2
䚷
Cautions before work
4
DANGER
䟿
WARNING
䟿
CAUTION
䟿
CAUTION
Always check the machine to see if there is any loosened
bolt or abnormal part. Operate the machine after making sure
the machine is in normal condition.
The faceplate (operation method, warning information, etc.)
on the machine is very important for safe operation of the
machine. Clean the machine and always keep the
information on the faceplate clearly legible.
When the information on the faceplate (operation method,
warning information, etc.) on the machine is difficult to read,
replace it with a new one.
It is dangerous if young children come into contact with the
machine. Use some measure, such as "Do not enter" sign
around the work area or proper storage (storage location) of
the machine, to prevent children from coming near the
machine.
MIKASA is not responsible for remodeling without
manufacturer's permission or accident caused by any use
other than [warning for incorrect purpose and incorrect use].
䚷 Always keep the work area clean.
䚷 Consider the surrounding condition of work area.
Before working, carefully make sure that there is no
buried pipe such as electric wire tubes, water pipes or
gas pipes in the area where work is to be done.
䕿
If there are buried objects, the tool might touch them, causing an
accident of electrification or electric leak, or gas leakage.
䕿
Unorganized littered work site is likely to cause accident.
䕿䕿䕿
Do not use the machine in rain, and when the plug or the outlet
of vibrator and extension cord is wet.
Keep the work area sufficiently lighted.
Do not use the machine in the environment where there is
flammable liquid gas nearby.
䚷 Noise prevention rule
For noise, there are laws and rules established by the ordinances
of each municipality.
It is necessary to use the machine at below the specified allowable
noise level to prevent noise problem in the vicinity.
Depending on the situation, use noise shielding fence when
working.
䕿䚷㻯㼔㼑㼏㼗㻌㼠㼔㼑㻌㼜㼛㼣㼑㼞㻌㼟㼛㼡㼞㼏㼑㻌㼠㼛㻌㼎㼑㻌㼡㼟㼑㼐㻚
Please check the followings before using the machine.
Check the following items before plugging into the
outlet.
Always make sure the power is the one shown on the
faceplate. The power voltage you can use is 90-110V single
phase. If you use the voltage that exceeds the display, the
motor coil might be burned out.
If the voltage is low, the current flowing to the motor circuit
increases and there arises potential for danger of burnout.
Also do not use direct current power. That will result not only
in damage of the product but also in accident.
*
*

䕿䚷䚷
䚷䞉
DANGER
䟿
WARNING
䟿
䕿䚷䚷
䚷䞉
CAUTION
䚷
5
䕿䚷
䚷䚷䞉䚷䚷䞉䚷䚷䞉䚷䚷䞉㻌㻌㻌㻌㻌䞉
Check of earth leakage braker.
Because this product is double insulation structure, the setting of
earth leakage braker is exempted by a law. But this machine is
very dangerous because it's used at a juicy place.Use electric
leakage braker by all means.
䕿
Make sure the switch is turned off.
If the machine is plugged without knowing that the switch turned
on, the machine starts to operate unexpectedly, causing an
accident. The switch is turned on when it pulled trigger, and
turned off when separated trigger.
Always check that the switch can be turned on and off by pulling
and separating of the trigger.
䚷䚷
䞉䚷䚷䞉
WARNING
䟿
WARNING
䟿
䕿䚷䚷
䚷䞉
Check the assembly of motor and flexible hose.
Check on whether the LOCK NUT of the flexible hose is
completely tightened in a motor. (MGX type is the left screw.)
Check of the plug and power outlet.
If you experience looseness when the plug is inserted into the
outlet, or if the plug comes off from the outlet, you need some
repair.
If used without repair, overheating might occur, resulting in an
accident.
(Connection) Extension cord

㻞
Use an (connection) extension cord that is not damaged.
If the power source is far away from the machine and you need
an extension cord, use the one with sufficient size that allows
the flow of necessary current, and try to make the length of the
cord as short as possible for maximum efficiency and trouble
free operation of the machine.
Use the extension cabtyre cord of thickness more than core line
1.25 mm .
As the cord gets longer, the voltage becomes lowered in
proportion to the length, which results in poor motor starting
operation and lowering of output.(MGX type can extend
approximately 50m at 2 mm .)
For outdoor use, use cabtyre cord or cabtyre cable connection
(extension) cord.
4-3 Cautions during work
䚷䕿䚷䕿䚷䕿䚷
WARNING
䟿
Always be alert and pay careful attention to your work.
When using the vibrator, work very carefully with careful attention
to the operation method, work method and the surrounding
condition.
Use your common sense.
When you are tired, do not use the machine.
䚷䕿䚷䕿䚷
䟿
DANGER Avoid sudden start.
Do not carry the machine with the switch turned on while
connected to the power source.
Before plugging, make sure that the switch is turned off.
䟿
DANGER
䚷䕿䚷䕿䚷䕿䚷
䟿
CAUTION Do not handle the cord carelessly.
Do not pull the cord when trying to unplug it.
Do not use the machine by hanging it with the cord.
Do not put the cord near heat, oil or sharp corner.
Do not use the vibrator that cannot be started or stopped
by the operation of the switch.

4-5
䚷
Labeling position
䚷䕿䚷䕿䚷ࠉࠉ䕿䚷䕿䚷䕿䚷䕿䚷
4-6
䚷
Descriptions of symbols used on safety label
䐟䚷䚷
䐠䚷䚷䚷
䐡䚷䐢䚷䚷䚷
Fig.No.
䚷㻌㻌㻌
Part No.
䚷䚷䚷䚷
P a r t n a m e
㻌䚷䚷䚷䚷䚷䚷
Remark
23
䚷㻌
9201-10850
㻌㻌
Nameplate, Product No./MGX
㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌㻌
NP-1085
26
䚷㻌
9201-10460 Nameplate, Combination of caution labels
㻌㻌㻌
NP-1046
50
䚷㻌
9201-10550 Nameplate, Double insulation NP-1055 No.50
No.26
No.23
No.23 No.26No.50
䐟䐠䐡䐢
6
MGX 2 8 0
W
100V 㹼㹆㹸
㸿
㹔㹎㹋
No
Made In Japan
NP 㸫㸯㸮
P
S
E
WARNING
䟿䟿
DANGER If you notice abnormal condition of the machine or
abnormal noise while using the machine, turn off the
switch immediately to stop the machine. Then contact the
sales store or the rental store to ask for inspection and
repair. Electric leak or fire accident might occur.
䕿䚷
ࠉ
ࠉ
CAUTION
When not used, always turn off the switch.
Do not use the machine with abnormal posture.
Always secure stable footing and keep good balance.
䚷
WARNING
䟿
When working at high location, make sure that there is no
one underneath. For safe work, use a safety wire to
prevent the fall of the machine.
䚷
WARNING
䟿
Do not let children come near the machine.
Anyone other than the workers should not be allowed to touch the
high frequency vibrator and extension cord.
Do not allow anyone other than the workers to come near the
work area.
4-4 Cautions for maintenance
Before inspection and maintenance work, always turn off
the switch and unplug from the power outlet.
Do maintenance work carefully.
Check the cord regularly, and if damage is detected, contact the
sales store for repair.
If repair is done by someone without proper repair knowledge or
skill, the machine will not function properly, and even accident and
injury might occur.
When using a connection (extension) cord, check it regularly and if
damage is detected, replace it with a new one.
Keep the holding part dry and clean all the time. Keep the holding
part free of oil and grease.
Double Insulation
Read the instruction manual carefully.
Do not use in rain (to avoid electrification, short circuit).
Wear ear and eye protection gear
Double insulation
Read the instruction manual before use, and operate the machine safely.
Do not use the machine in rain.
Do not wash with water.
Do not leave the machine in rain without covering.
Do not transport the machine in rain without covering.
Double insulation structure. Grounding not required.

5. Appearance
5-1 Outline drawing (dimension and name of each part)
Figure 1: Name of each part
㻯㻩㻺㼍㼙㼑䚷䠄䡉䠅㻭㻩䚷䠄䡉䡉䠅㻮㻩䠄䡉䡉䠅䠄䠌䠊䠒㼙䠅㻣㻤㻜㻝㻘㻜㻟㻤䠍䠊䠌䡉㻝㻘㻝㻤㻜㻝㻘㻠㻟㻤䠍䠊䠑䡉㻝㻘㻢㻤㻜㻝㻘㻥㻟㻤䠎䠊䠌䡉㻞㻘㻝㻤㻜㻞㻘㻠㻟㻤
㻨㻰㻪㻔䟚㻕㻹㻳㼄㻙㻞㻟㻞㻟㻹㻳㼄㻙㻞㻤㻞㻤㻹㻳㼄㻙㻟㻞㻟㻞㻹㻳㼄㻙㻟㻤㻟㻤㻝㻚㻞㻝㻚㻤㻝㻚㻥㻞㻚㻜㻝㻚㻟㻝㻚㻣㻝㻚㻥㻞㻚㻞
㻔䟙 )
㻔䟚㻕㻴㼦㻔㼂㻚㻼㻚㻹㻕
㻞㻜㻜䡚㻞㻡㻤㻔㻝㻞㻘㻜㻜㻜䡚㻝㻡㻘㻡㻜㻜㻕
㻞㻤㻜㼃㻝㻜㻜㼂㻠㻚㻡㻭㻞㻚㻥㻣㻤㻜
5-2 Specification
6. Concrete casting
ەࠉ䕿䚷䕿䚷䚷䕿䚷䖃䚷䕿䚷䖃䚷䚷䚷䕿䚷
7
㹀㸿㹂
Switch
Motor
Lock nut
Flexible hose
Vibrating head
㹁
Intake
P
Portable Concrete Vibrator has each dimensions of
the list shown below other than standard length.
Hose length
A = Shaft set length
B = Full length
C = Flexible hose length
D = Vibrating head diameter
Shaft set
length Full length
Standard
Model
Shaft set
Dia. Length <A>
㻨㻮㻪㻔䟚㻕㻝㻘㻜㻟㻤
Full
㻔䟚㻕㻤
Shaft
Dia.
㻞㻜㻔䟚㻕㻞㻠㻚㻢
Dia.
Hose Amplitude Vibration Use motor
(Commutator motor)
Weight<Mass>
Shaft set Motor
( With cord
4m )
CAUTION
CAUTION
Before using the vibrator, do warm up for 2 to 3 minutes.
When the ambient temperature is low, do warm up for more than 2 to 3 minutes before use.
Securely insert the plug into the socket, and operate the switch quickly and properly.
Before turning on the switch, take out the vibrating head of the vibrator
out from the concrete.
When the motor is started with the vibrating head in the concrete, the motor might
not start if the voltage is low or some other unfavorable condition exists. If the
switch is left turned on under such condition, the motor burnout might occur.
Vertically insert the entire vibrating head in the concrete gently, then pull it out gently.
In order to prevent excessive vibration from being applied, the standard insertion time for concrete
of 12 to 18 cm slump should be about 15 sec. at one location for an interval of 30 to 50 cm.
Do not immerse the motor part in the concrete.
Only the part below the locknut may be immersed in the concrete.
While using the vibrator, try not to bend the flexible hose too much.
Also, do not put heavy objects on the hose, nor drop heavy objects on
the hose.
When moving the vibrator, do not drag the Cabtyre cord and the hose.
Hold the motor handle when moving the vibrator.

7. Maintenance and storage
䕿䚷䕿䚷䚷
Danger
䟿
7-1 Check of bolts used to fix parts
7-2 Remove the mortar that has adhered at the air vent (cap).
䕿䚷
7-3 Check of grease on flexible shaft and bearing
䕿䚷䕿䚷䚷
Warning
䟿䕿䚷䕿䚷䚷䕿䚷䕿䚷
Caution
䚷
8
Always turn off the switch and unplug from the power
outlet before starting check or maintenance work.
Regularly check the bolts used to fix parts to see if there is any looseness. If
looseness is found, tighten again securely.
If the machine is used with loosened bolts, an accident leading to injury might occur.
If the air vent is clogged, overheating occurs, which might result in burnout. (Refer to Figure 1)
After each operation of about 200 hours, cleanly wipe off the grease on the flexible
shaft and bearing, then apply new grease evenly on the entire surface of the shaft. Pull
out the rotor from the vibrating case, then wash well the inside of the case and the
bearing of the rotor. When a new bearing is used, fill it sufficiently with grease. Do not
put grease inside the case.
Use heat resistant grease that will not be deteriorated by change in temperature. Use
[for example, Pyronoc No.2 of Nippon Oil Corporation (previously Nisseki Mitsubishi)].
For vibrator repair, please contact your distributor.
This product complies with the applicable safety requirements. Please do
not try to make alterations.
For repair, please contact your distributor.
If repair is done by someone without proper knowledge and skill, it might
result in the performance of the machine being compromised, and even
there might arise a risk of accident or injury.
Check of carbon brush
If you notice a drop in motor revolution or lowering of the force, remove
the back cover of the motor to check the wear of carbon brush.
For MGX model, the carbon brush should be replaced with a new one
when its remaining length is less than 5mm (length of new brush is
12mm).
Contact your distributor if you need to replace a carbon brush.
Make sure to use a MIKASA genuine carbon brush when replacing
the carbon brush with a new one.