THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.
NOTES
PAGE 2 — MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12)
SILICOSIS/RESPIRATORY WARNINGS
WARNING
SILICOSIS WARNINGRESPIRATORY HAZARDS
Grinding/cutting/drilling of masonry, concrete, metal and
other materials with silica in their composition may give
off dust or mists containing crystalline silica. Silica is a
basic component of sand, quartz, brick clay, granite and
numerous other minerals and rocks. Repeated and/or
substantial inhalation of airborne crystalline silica can
cause serious or fatal respiratory diseases, including
silicosis. In addition, California and some other
authorities have listed respirable crystalline silica as a
substance known to cause cancer. When cutting such
materials, always follow the respiratory precautions
mentioned above.
WARNING
Grinding/cutting/drilling of masonry, concrete, metal and
other materials can generate dust, mists and fumes
containing chemicals known to cause serious or fatal
injury or illness, such as respiratory disease, cancer,
birth defects or other reproductive harm. If you are
unfamiliar with the risks associated with the particular
process and/or material being cut or the composition of
the tool being used, review the material safety data
sheet and/or consult your employer, the material
manufacturer/supplier, governmental agencies such as
OSHA and NIOSH and other sources on hazardous
materials. California and some other authorities, for
instance, have published lists of substances known to
cause cancer, reproductive toxicity, or other harmful
effects.
Control dust, mist and fumes at the source where
possible. In this regard use good work practices and
follow the recommendations of the manufacturers or
suppliers, OSHA/NIOSH, and occupational and trade
associations. Water should be used for dust
suppression when wet cutting is feasible. When the
hazards from inhalation of dust, mists and fumes cannot
be eliminated, the operator and any bystanders should
always wear a respirator approved by NIOSH/MSHA for
the materials being used.
MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12) — PAGE 3
Terms And Conditions Of Sale — Parts ................ 28
NOTICE
Specifications and part numbers are subject to change
without notice.
PAGE 4 — MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12)
PARTS ORDERING PROCEDURES
Ordering parts has never been easier!
If you have an MQ Account, to obtain a Username
Effective:
Choose from three easy options:
January 1st, 2006
Best Deal!
Order via Internet (Dealers Only):
Order parts on-line using Multiquip’s SmartEquip website!
■ View Parts Diagrams
■ Order Parts
■ Print Specifi cation Information
Goto www.multiquip.com and click on
Order Parts
to log in and save!
Order via Fax (Dealers Only):
All customers are welcome to order parts via Fax.
Domestic (US) Customers dial:
1-800-6-PARTS-7 (800-672-7877)
Order via Phone:
Non-Dealer Customers:
Contact your local Multiquip Dealer for
parts or call 800-427-1244 for help in
locating a dealer near you.
and Password, E-mail us at: parts@multiquip.
com.
To ob tai n an MQ Ac cou n t, con tac t your
District Sales Manager for more information.
Use the internet and qualify for a 5% Discount
on Standard orders for all orders which include
complete part numbers.*
Fax your order in and qualify for a 2% Discount
on Standard orders for all orders which include
complete part numbers.*
Domestic (US) Dealers Call:
1-800-427-1244
International Customers should contact
their local Multiquip Representatives for
Parts Ordering information.
Note: Discounts Are Subject To Change
Note: Discounts Are Subject To Change
❒ Dealer Account Number
❒ Dealer Name and Address
❒ Shipping Address (if different than billing address)
❒ Return Fax Number
❒ Applicable Model Number
❒ Quantity, Part Number and Description of Each Part
www.multiquip.com
MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12) — PAGE 5
When ordering parts, please supply:
❒ Specify Preferred Method of Shipment:✓ UPS/Fed Ex ✓ DHL
■ Priority One ✓ Truck
■ Ground
■ Next Day
■ Second/Third Day
NOTICE
All orders are treated as Standard Orders and will
ship the same day if received prior to 3PM PST.
WE ACCEPT ALL MAJOR CREDIT CARDS!
DO NOT operate or service the equipment
before reading the entire manual. Safety
PERSONAL SAFETY
of inattention while operating power tools may result in
Prevent unintentional starting. Ensure the switch is in the
off position before connecting to power source, picking
fi nger on the switch or energizing power tools that have
Remove any adjusting key or wrench before turning the
power tool on. A wrench or a key left attached to a rotating
overreach. Keep proper footing and balance at
all times. This enables better control of the power tool in
Keep your hair, clothing and gloves away from moving
parts. Loose clothes, jewelry or long hair can be caught
connected and properly used. Use of dust collection can
precautions should be followed at all times
when operating this equipment. Failure to
read and understand the safety messages
and operating instructions could result in injury to yourself
and others.
SAFETY MESSAGES
SAFETY INFORMATION
CAUTION
Stay alert, watch what you are doing and
use common sense when operating a
power tool. Do not use a power tool while
you are tired or under the infl uence of
drugs, alcohol or medication. A moment
The four safety messages shown below will inform you
about potential hazards that could injure you or others. The
safety messages specifi cally address the level of exposure
to the operator and are preceded by one of four words:
DANGER, WARNING, CAUTION or NOTICE.
SAFETY SYMBOLS
DANGER
Indicates a hazardous situation which, if not avoided,
WILL result in DEATH or SERIOUS INJURY.
WARNING
Indicates a hazardous situation which, if not avoided,
COULD result in DEATH or SERIOUS INJURY.
CAUTION
Indicates a hazardous situation which, if not avoided,
COULD result in MINOR or MODERATE INJURY.
NOTICE
Addresses practices not related to personal injury.
serious personal injury.
Use personal protective equipment. Always wear eye
protection. Protective equipment such as dust mask,
non-skid safety shoes, hard hat, or hearing protection
used for appropriate conditions will reduce personal
injuries..
up or carrying the tool. Carrying power tools with your
the switch on can cause accidents.
part of the power tool may result in personal injury.
DO NOT
Potential hazards associated with the operation of this
equipment will be referenced with hazard symbols which
may appear throughout this manual in conjunction with
safety messages.
SymbolSafety Hazard
Burn hazards
Electric shock hazards
PAGE 6 — MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12)
unexpected situations.
Dress properly. Do not wear loose clothing or jewelry.
in moving parts.
If devices are provided for the connection of dust
extraction and collection facilities, ensure these are
reduce dust-related hazards.
SAFETY INFORMATION
GENERAL POWER TOOL SAFETY WARNINGS
NEVER use accessories or attachments that are not
recommended by Multiquip for this equipment. Damage
keep
Also, know the phone numbers
fi re department.
wear rubber insulated gloves and boots when
holding the fl exshaft during operation. The possibility of
The possibility of electrocution exists causing equipment
carry plugged-in motor with fi nger on the switch.
check the vibrator motor for loosened hardware
overload the motor. It will do a better and safer
WARNING
Read all safety warnings and all instructions.
Failure to follow the warnings and instructions
may result in electric shock, fire and/or
serious injury.
Save all warnings and instructions for future reference.
NOTICE
The term "power tool" in the warnings refers to your
mains-operated (corded) power tool.
WORK AREA SAFETY
NOTICE
Keep work area clean and well lit. Cluttered or dark areas
invite accidents.
DO NOT operate power tools in explosive atmospheres,
such as in the presence of fl ammable liquids, gases or
dust. Power tools create sparks which may ignite the dust
or fumes.
Keep children and bystanders away while operating a
power tool. Distractions can cause you to lose control.
to the equipment and/or injury to user may result.
ALWAYS know the location of the nearest
fi re extinguisher.
ALWAYS know the location of the nearest
fi rst aid kit.
ALWAYS know the location of the nearest phone or
a phone on the job site.
of the nearest ambulance, doctor and
This information will be invaluable in the case of an
emergency.
MOTOR AND FLEXSHAFT SAFETY
DANGER
ALWAYS
electrocution exists causing equipment damage and
severe bodily harm even death!
ALWAYS clear the work area of any debris, tools, etc.
that would constitute a hazard while the equipment is
in operation.
No one other than the operator is to be in the working
area when the equipment is in operation.
DO NOT use the equipment for any purpose other than
its intended purpose or application.
This equipment should only be operated by trained and
qualifi ed personnel, 18 years of age and older.
Whenever necessary, replace nameplate, operation and
safety decals when they become diffi cult read.
Manufacturer does not assume responsibility for any
accident due to equipment modifi cations. Unauthorized
equipment modifi cation will void all warranties.
DANGER
If applicable, periodically check insulation resistance.
damage and severe bodily harm even death!
WARNING
NEVER attempt to run the core outside the casing
assembly for any reason.
CAUTION
DO NOT
NEVER carry the motor by the cord. Use the carrying
handle.
ALWAYS
such as nuts and bolts before starting.
Keep the cord from heat, oil, and sharp objects.
DO NOT
job at the rate for which it was designed.
MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12) — PAGE 7
SAFETY INFORMATION
DO NOT expose vibrator motor to rain.
ELECTRICAL SAFETY
modify the plug
use any adapter plugs with earthed
(grounded) power tools. Unmodifi ed plugs and matching
Avoid body contact with earthed or grounded surfaces
such as pipes, radiators, ranges and refrigerators. There is
an increased risk of electric shock if your body is earthed
expose power tools to rain or wet conditions.
carrying, pulling or unplugging the power tool. Keep cord
away from heat, oil sharp edges or moving parts. Damaged
When operating a power tool outdoors, use an extension
cord suitable for outdoor use. Use of a cord suitable for
frame makes grounding unnecessary. However, if parts
are replaced with wrong parts or assembled incorrectly,
as a Ground Fault Circuit Interrupter, for the protection
make sure the ON/OFF switch on the electric
motor is in the OFF position when not in use and before
ALWAYS
DO NOT use vibrator motor in damp or wet locations
without proper electrical circuits.
DO NOT immerse the motor part in concrete.
ALWAYS keep clear of rotating or moving parts while
operating the vibrator motor.
NEVER leave the machine unattended while running.
ALWAYS disconnect the motor from the power source
when not in use, before servicing, and when changing
fl exible shafting and vibrator heads.
Allow the vibrator motor to cool before
servicing. Contact with hot components can
cause serious burns.
Before each use, ALWAYS check the motor
to make certain that there are no damaged parts and that
all parts function properly (such as switch, cord housing).
If any damage or malfunctioning parts are found, have
them repaired or replaced by an authorized service facility.
NOTICE
Secure forms. Make sure the form work is well made and
braced to withstand the stresses made by vibration.
Keep vibrator motor clean for better and safer operation.
CAUTION
Power tools must match the outlet. NEVER
in any way. DO NOT
outlets will reduce risk of electric shock.
or grounded.
DO NOT
Water entering a power tool will increase the risk of
electric shock.
DO NOT abuse power cord. NEVER use the cord for
or entangled cords increase the risk of electric shock.
outdoor use reduces the risk of electric shock.
This unit is double-insulated. The double-insulation
between the electric-conducting part and the outside
ALWAYS store equipment properly when it is not being
used. Equipment should be stored in a clean, dry location
out of the reach of children and unauthorized personnel.
Use only factory-authorized replacement parts.
Store idle vibrator motor. When not in use, motor should
be stored in a dry, safe storage area.
PAGE 8 — MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12)
the vibrator may become unsafe to operate. Use only
Multiquip recommended replacement parts.
When applicable, use a protection wiring device, such
of personnel.
Operate electric motor only at the specifi ed voltage
indicated on the nameplate.
DO NOT spray water onto electric motor.
DO NOT yank the cord to disconnect it from the
receptacle. Grasp the plug itself to disconnect it.
ALWAYS
inserting the power plug into an AC receptacle.
Before plugging the motor into a power source,
remove any wrenches or other tools from the motor,
shaft, and head that were used for assembly.
Power Cord/Cable Safety
Disconnect the plug from the power source and/or the
tools. Such preventive safety measures reduce the risk
Store idle power tools out of the reach of children and do
not allow persons unfamiliar with the power tool or these
instructions to operate the power tool. Power tools are
Maintain power tools. Check for misalignment or binding
damaged, have the power tool repaired before use. Many
accidents are caused by poorly maintained power tools.
Keep cutting tools sharp and clean. Properly maintained
accordance with these instructions, taking into account
Use of the power tool for operations different from those
person using only identical replacement parts. This will
pour waste or oil directly onto the ground, down
SAFETY INFORMATION
DANGER
ALWAYS use a grounded 3-wire extension cord that has
a 3-prong grounding plug, and a 3-pole receptacle that
accepts the plug on the concrete vibrator motor. DO NOT
REMOVE THE GROUNDING PIN FROM THE PLUG!
NEVER let power cords or cables lay in water.
NEVER use damaged or worn cables or cords when
connecting equipment to generator. Inspect for cuts in
the insulation.
NEVER grab or touch a live power
cord or cable with wet hands. The
possibility exists of electrical shock,
electrocution or death.
Make sure power cables are securely connected.
Incorrect connections may cause electrical shock and
damage to the vibrator motor.
CAUTION
Ensure that cables and cords will not be tripped over.
NOTICE
ALWAYS make certain that proper power or extension
cord has been selected for the job.
Use only extension cords that are intended for outdoor
use and so marked.
Use only the gauge wire and length of cord recommended
for the motor size. If in doubt, go to the next heavier gauge.
(The smaller the gauge number, the heavier the cord.)
POWER TOOL USE AND CARE
battery pack from the power tool before making any
adjustments, changing accessories, or storing power
of starting the power tool accidentally.
dangerous in the hands of untrained users.
of moving parts, breakage of parts and any other
condition that may affect the power tool's operation. If
cutting tools with sharp cutting edges are less likely to
bind and are easier to control.
Use the power tool, accessories and tool bits etc. in
the working conditions and the work to be performed.
intended could result in a hazardous situation.
SERVICE
Have your power tool serviced by a qualifi ed repair
ensure that the safety of the power tool is maintained.
ENVIRONMENTAL SAFETY/DECOMMISSIONING
NOTICE
DO NOT
a drain or into any water source.
DO NOT force the power tool. Use the correct power tool
for your application. The correct power tool will do the
job better and safer at the rate for which it was designed.
DO NOT use the power tool if the switch does not turn it
on and off. Any power tool that cannot be controlled with
the switch is dangerous and must be repaired.
MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12) — PAGE 9
Contact your country's Department of Public Works or
recycling agency in your area and arrange for proper
disposal of any electrical components, waste or oil
associated with this equipment.
When the life-cycle of this equipment is
over it is recommended that the head
casing and all other metal parts be sent
to a recycling center.
120 Volt
Models
MGX12325MGX22325
MGX12810MGX22810
MGX12825MGX22825
MGX13225MGX23225
MGX13810MGX23810
MGX13825MGX23825
240 Volt
Models
Amps 120V
(240V)
3.8
(2.1)
3.8
(2.1)
3.8
(2.1)
3.8
(2.1)
3.8
(2.1)
3.8
(2.1)
Watts
280
280
280
280
280
280
Table 1. Vibrator Specifications
Head
in. (mm)
.905
(23)
1.10
(28)
1.10
(28)
1.25
(32)
1.5
(38)
1.5
(38)
Shaft Dia
in. (mm)
.79
(20)
.98
(25)
.98
(25)
.98
(25)
.98
(25)
.98
(25)
Amplitude
in. (mm)
.047
(1.2)
.070
(1.8)
.070
(1.8)
.075
(1.9)
.079
(2.0)
.079
(2.0
Frequency
Hz (vpm)
12,000 to
15,500
(200 to
258)
12,000 to
15,500
(200 to
258)
12,000 to
15,500
(200 to
258)
12,000 to
15,500
(200 to
258)
12,000 to
15,500
(200 to
258)
12,000 to
15,500
(200 to
258)
Shaft
Length
ft. (m)
8.2
(2.5)
3.2
(1.0)
8.2
(2.5)
8.2
(2.5)
3.2
(1.0)
8.2
(2.5)
SPECIFICATIONS
Overall
Length ft.
(m)
9.5
(2.9)
4.7
(1.4)
9.5
(2.9)
9.5
(2.9)
4.7
(1.4)
9.5
(2.9)
Motor
Weight
lb. (kg)
6.4
(2.9)
6.4
(2.9)
6.4
(2.9)
6.4
(2.9)
6.4
(2.9)
6.4
(2.9)
Shaft/
Head
Weight
lb. (kg)
5.07
(2.3)
3.08
(1.4)
5.07
(2.3)
3.08
(1.4)
5.07
(2.3)
3.08
(1.4)
Total
Weight
lb. (kg)
11.5
(5.2)
9.5
(4.3)
11.5
(5.2)
9.5
(4.3)
11.5
(5.2)
9.5
(4.3)
Table 2. Replacement Heads and Shafts Specifications
Head/Shaft Model
MGX2325
MGX2810
MGX2825
MGX3225
MGX3810
MGX3825
Head Diameter
in. (mm)
.9
(23)
1.10
(28)
1.10
(28)
1.25
(32)
1.5
(38)
1.5
(38)
Shaft Length
ft (m)
8.2
(2.5)
3.2
(1.0)
8.2
(2.5)
8.2
(2.5)
3.2
(1.0)
8.2
(2.5)
PAGE 10 — MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12)
C
120 Volt
Models
MGX12325MGX22325
MGX12810MGX22810
MGX12825MGX22825
MGX13225MGX23225
MGX13810MGX23810
MGX13825MGX23825
240 Volt
Models
DIMENSIONS
Table 3. Dimensions
Head (A)
in. (mm)
.905
(23)
1.10
(28)
1.10
(28)
1.25
(32)
1.5
(38)
1.5
(38)
Shaft
Length (B)
ft. (m)
8.2
(2.5)
3.2
(1.0)
8.2
(2.5)
8.2
(2.5)
3.2
(1.0)
8.2
(2.5)
Overall
Length (C)
ft. (m)
9.5
(2.9)
4.7
(1.4)
9.5
(2.9)
9.5
(2.9)
4.7
(1.4)
9.5
(2.9)
B
A
Figure 1. MGX Vibrator Dimensions
MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12) — PAGE 11
GENERAL INFORMATION
INSERTION SPACING
The MGX Vibrator has a double-insulated motor (no ground
necessary) with advanced and user-friendly design. The
motor is lightweight and durable with an aluminum motor
case. The frontend closed-motor design prevents any
invasion of mortar and foreign material from the front.
Original cord protector gives flexibility to input cord for
longer cord life.
Multiquip's shaft/heads are designed to work in medium
to high slump concrete. Typical applications include small
pours, slabs driveways, stem walls and footings.
A vibrating steel head is attached to one end of the flexshaft.
This head generates vibration via an eccentric rotator that
consolidates the concrete by removing air pockets. The
round head design allows for the transmission of vibration
in all directions.
WHY VIBRATE CONCRETE
To ensure optimum strength and durability, vibration of
fresh concrete is an important requirement. Vibration or
compaction is the principal method for consolidation of
concrete.
CONSOLIDATION
Consolidation eliminates pockets of aggregate and air
bubbles maximizing strength, eliminating surface voids.
Vibrators consolidate concrete by transmitting shock waves
which allow the aggregate to float freely while pushing
lighter trapped air up and out of the concrete mix.
A properly consolidated concrete pour will display a thin line
of mortar appearing along the form near the vibrator and the
coarse aggregate has been dispersed evenly throughout
the pour and is not visible.
VIBRATION TIME
VIBRATION RANGE
Vibration range (Figure 2) can be defined as "Area of
Influence". This area of influence (vibrating radius) is the
distance from the center of the vibrator to the outer most
edge.
AREA OF INFLUENCE
(VIBRATING RADIUS)
R
D
VIBRATOR HEAD
Figure 2. Vibrator Radius/Spacing
Table 4 shows the vibration radius and spacing for a given
vibrator head diameter.
Table 4. Vibrating Radius/Insertion
Spacing
120 Volt
Models
MGX12325 MGX22325
MGX12810 MGX22810
MGX12825 MGX22825
MGX13225 MGX23225
MGX13810 MGX23810
MGX13825 MGX23825
240 Volt
Models
Vibration
HeadDia.
in. (mm)#
.9 (23)4 (102)6 (152)
1.1 (28)5.5 (140) 8.25 (210)
1.1 (28)5.5 (140) 8.25 (210)
1.25 (32)8 (203)12 (305)
1.5 (38)12 (305)18 (427)
1.5 (38)12 (305)18 (427)
Radius
(R) in.
(mm)
Vibrator
Spacing
(D) in.
(mm)
Vibration time depends on frequency. The higher the
frequency, the less vibration time is required for the job.
PAGE 12 — MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12)
NOTICE
Radius (area of influence R) and vibrator head spacing
(D) are expressed in inches/millimeters. Radius and
distance values expressed in Table 4 are only to be
used as a general guide. Values are subject to change.
GENERAL INFORMATION
INSERTION SPACING
NOTICE
Vibrator head spacing distance (D) is calculated by
multiplying the vibrating head radius (R) (area of
influence) by 1.5.
When determining which head to choose it is important
to access the application. Mainly what are the dimensions
of the application. Select the vibrator head based on its
radiating radius characteristics. Reference Table 4.
Select the vibrating head that covers the largest possible
area without excessive overkill. This will allow for more
efficient productivity. General rule of thumb is DO NOT
select a vibrator head which has a vibration radius of more
than twice the width of the form.
Example:
If the form width is 9 inches (229 mm) the selected vibrator
head radius should not exceed an 18 inch (457 mm) radius.
In this example the MGX3810 and MGX3825 head/shaft
would be the recommended choice. Refer to Table 4 and
Figure 3.
NOTICE
Vibration techniques, vibrator head placement and
spacing as referenced in the "General Information" and
"Operation" sections of this manual is only to be used as a guideline. Multiquip assumes no responsibility for
vibrator operating techniques referenced in this manual.
The consolidation of concrete has many mitigating
factors that must be considered such as slump, mix,
depth of vibrator, vibrator spacing, vibration time,
vibration frequency, temperature. All of these factors
must be considered when the consolidation (vibration)
of concrete is required.
AREA OF INFLUENCE
(VIBRATING RADIUS)
CONCRETE
FORM
WIDTH
NO VIBRATION
TOO SMALL AREA
OF INFLUENCE
(VIBRATING RADIUS)
VIBRATOR HEAD
INSERTION POINT
NO VIBRATION
VIBRATOR HEAD
Figure 3. Head Selection
MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12) — PAGE 13
CORRECT
COMPONENTS
1. ON/OFF Switch — Turns power on when pressed and
1
8
2
7
off when released.
2. Power Cord — Connects to the power source. (120V or
220V depending on model). Make sure to check voltage
on motor nameplate and connect to the appropriate
power source.
3. Motor — 120V or 240V depending on model.
4. Flexible Shaft — Transmits rotary motion from the
motor to the head.
3
6
5. Vibrator Head — Generates vibration via an eccentric
rotator that consolidates the concrete by removing air
pockets.
6. Coupler — Attaches the shaft/head assembly to the
motor.
7. Air Intake —Air comes in and suctioned by the fan to
cool the motor, then discharged at the rear of the motor.
8. Power Lock Button — Locks the ON/OFF Switch to
the ON position. Lock is released when the ON/OFF Switch is pressed again.
4
5
Figure 4. MGX Vibrator Components
PAGE 14 — MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12)
OPERATION
OPERATION
1. Connect the vibrator to the proper power source.
2. If an extension cord is necessary, refer to Table 5 for
the correct type of extension cord to use.
Table 5. Extension Cord Types
Current
in
Amperes
2.53006001000 ft.600 ft.375 ft.250 ft.
56001200500 ft.300 ft.200 ft.125 ft.
7.59001800350 ft.200 ft.125 ft.100 ft.
1012002400250 ft.150 ft.100 ft.
1518003600150 ft.100 ft.65 ft.
2024004800125 ft.75 ft.50 ft.
3. Hold vibrator head above concrete pour when starting
drive motor. This will prevent the vibrator head from
bouncing on hard surfaces which could damage the
bearings.
4. Push the ON/OFF switch to the ON position then
immerse into the surface. Do not run the motor outside
of the surface for long periods.
NOTICE
Pressing the Power Lock Button will lock the On/OFF
switch to the ON position.
5. Keep flexshaft (Figure 5) straight as possible when
operating. Sharp bends increase the load on the core
and drive motor, which will result in early core failure
and possible damage to the drive motor.
1-1/2 TIMES AREA
Load in WattsMaximum Allowable Cable Length
At 100
Volts
OF INFLUENCE
At 200
Volts
#10 Wire #12 Wire #14 Wire #16 Wire
FLEX-SHAFT
VIBRATOR HEAD
6. Completely immerse the vibrator head quickly into
the concrete mix at a verticle rate of about one foot
per second (0.3 meters/second). Vibrate concrete for
about 5 to 15 seconds for wet mixes. For stiff mixes
vibrate 2-3 minutes.
7. Stop vibration of concrete mix when concrete has a
level, glossy surface and there are no breaking air
bubbles.
8. Slowly lift the head out of the mix using an up and
down movement. This slight up and down movement
will close the hole formed by the vibrator.
9. When lifting the head out of the concrete, withdraw
slowly at a rate of about 3 sec./ft. Using this technique
will avoid the re-trapping of air.
10. When near the top of the mix, withdraw the vibrator
quickly.
11. Re-insert vibrator into mix according to the "area
of influence" See Figure 5. Establish a symmertical
overlapping pattern for inserting and removing the
vibrator head.
12. If concrete is poured in layers, allow vibrator to pass
within 3 to 6 inches (76 to 152 mm.) into next layer to
ensure the knitting of the two layers. The complete
bonding of layers will prevent "lift lines" when forms
are removed.
NOTICE
DO NOT use vibrator to move concrete laterally. This
will cause segregation of the concrete. Use a shovel
or similar device to spread the concrete.
CORRECT
VIBRATOR HEAD
INCORRECT
Figure 5. Vibrator Head Insertion
MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12) — PAGE 15
MAINTENANCE
DRIVE MOTOR INSPECTION
1. Visually inspect the motor daily before use for defective
or missing parts, and have repairs made before use.
CARBON BRUSH REPLACEMENT
1. To gain access to the carbon brushes, remove the body
cover from the motor (see Figure 6).
Body Cover
Screw (4)
Screw (2)
Brush Holder
(2)
2. Remove the screw and washer securing the brush
holder.
3. Inspect the brush and replace when they become worn
to a length of 3/8".
VIBRATOR HEAD LUBRICATION (300 HOURS)
1. Using a wrench, remove vibrator head tip (Figure 7)
from vibrator head body. Have a cloth handy to catch
any spilled oil.
Vibrator Head
Vise
Rag
Washer
(Poly
Carbonate) - (2)
Carbon
Brush (2)
Screw (2)
Lubricate
Cover
Oil
Figure 7. Adding Oil (Vibrator Head)
Figure 6. Carbon Brush Replacement
PAGE 16 — MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12)
2. Drain old oil from vibrator head body (casing). Place oil
in a suitable container. DO NOT pour oil on the ground.
MAINTENANCE
NOTICE
Dispose used vibrator head oil in accordance with city,
local and state environmental guidlelines.
3. Fill vibrator head body with SAE 15 or AW MV ISO 46
type oil or equivalent.
4. DO NOT fill head body beyond capacity. Reference
Table 6.
NOTICE
DO NOT overfill. Too much oil in the vibrator head will
overload the drive motor.
Table 6. Vibrator Head Oil
Capacity
120 Volt
Models
MGX12325MGX223252.4 (70)
MGX12810MGX228100.5 (15)
MGX12825MGX228252.4 (70)
MGX13225MGX232252.4 (70)
MGX13810MGX238100.5 (15)
MGX13825MGX238252.4 (70)
240 Volt
Models
Oil Capacity.
oz. (ml)#
2. Replace vibrator shaft/head assembly if head diameter
is at maximum wear as specified in Table 7. See Table
2 for available models and specifications. Shaft/head
as sembli es shoul d be replaced by a qualif ied
technician.
Table 7. Vibrator Head Wear Diameter
120 Volt
Models
MGX12325MGX22325.905 (23).842 (21.39)
MGX12810MGX228101.1 (28)1.02 (25.91)
MGX12825MGX228251.1 (28)1.02 (25.91)
MGX13225MGX232251.25 (32)1.16 (29.46)
MGX13810MGX238101.5 (38)1.39 (35.31)
MGX13825MGX238251.5 (38)1.39 (35.31)
240 Volt
Models
New Head
Dia. in. (mm)#
Head Dia.
w/ Max Wear
in. (mm)
SHAFT LUBRICATION (200 HOURS)
1. Place the vibrator on a suitable workbench. Make sure
the area is clear of clutter.
2. Turn the plasticcoupler holding the shaft to the motor
clockwise until completely loose (Figure 9). If the
coupler does not come off easily, place motor in a
vise and hit the coupler with a rubber mallet to loosen.
VIBRATOR HEAD WEAR (300 HOURS)
1. Periodically measure the outside diameter (Figure 8)
of the vibrator head casing.
VIBRATOR HEAD
CASING DIAMETER
Figure 8. Vibrator Head Diameter
Motor
Plastic Coupler
Figure 9. Loosening Shaft Coupler
3. Gently pull out flexible shaft collar to access the flex
shaft core crimp. See Figure 10.
MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12) — PAGE 17
Core Crimp
MAINTENANCE
4. Place a 5/16-inch wrench on the flat side of the motor
shaft coupling.
5. Using a pair of pliers, grip the flex shaft core crimp.
6. Turn the motor coupling clockwise with the wrench to
remove shaft from motor.
Motor Threaded
Connector
Wrench
Flex Shaft
Pliers
LUBRICANT
TPG
WIRE
BRUSH
Figure 11. Cleaning Wire Core
CLOTH
WIRE
CORE
11. Apply a light amout of DuBois "TPG" lubricant (Figure 11)
or a good grade bearing grease to the entire length of
the wire core.
NOTICE
DO NOT force casing full of grease. A tightly packed
casing will load the drive motor which could lead to
overheating.
12. Reinstall wire core back into casing.
Plastic Coupler
Flex Shaft Core
Figure 10. Removing Shaft from Motor
7. Slowly pull the wire core from the shaft.
8. Inspect the core for broken wires, permanent set or
other damage such as an area that indicates high wear
or having overheated. If any of these conditions exist,
replace shaft/head assembly.
9. Use the core to push a cleaning patch through the
casing to remove any old grease or foreign matter that
may have accumulated inside the casing.
NOTICE
DO NOT use solvents to clean casing. Applying solvents
to the core or casing may cause grease (lubricant) to
breakdown, resulting in damage to the shaft.
13. Align the flexible shaft core to the motor shaft.
14. Using a pair of pliers, grip the flex shaft core crimp.
15. Place a 5/16-inch wrench on the flat side of the motor
shaft.
16. Turn the motor coupling counterclockwise with the
wrench until tight.
17. Align and push the flexible shaft into the motor threaded
connector.
18. Tighten the plastic coupler making sure shaft/head
assembly is connected securely to the motor.
10. Thoroughly clean wire core (Figure 11) if it is being
reused. A wire brush may be required to remove
hardened residue.
PAGE 18 — MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12)
TROUBLESHOOTING
Table 8. Vibrator Troubleshooting
SymptomPossible ProblemSolution
Shaft Binding
Leaking Vibrator Head
Shaft kinked?Straighten out shaft.
Defective shaft?Replace shaft/head.
Too much oil in head casing?Fill head casing to recommended level.
Head bearings/seals defective?Replace shaft/head.
MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12) — PAGE 19
EXPLANATION OF CODE IN REMARKS COLUMN
The following section explains the different symbols and
PART NO. Column
QTY. Column
— Item quantity can be indicated by a
A/R (As Required) is generally used for hoses or other
A blank entry generally indicates that the item is not sold
separately. Other entries will be clarifi ed in the “Remarks”
Some of the most common notes found in the “Remarks”
Column are listed below. Other additional notes needed
same unique symbol will be included when this item is
— Used to list an effective serial
— Indicates that the part
part is NOT used on a specifi c model or model number
available items. Examples include battery cables, shims,
— Indicates that an item cannot
be purchased as a separate item and is either part of an
assembly/kit that can be purchased, or is not available
remarks used in the Parts section of this manual. Use the
help numbers found on the back page of the manual if there
are any questions.
Numbers Used
number, a blank entry, or A/R.
NOTICE
The contents and part numbers listed in the parts
section are subject to change without notice. Multiquip
does not guarantee the availability of the parts listed.
4 12349 BEARING ..............1 .....S/N 2345B AND ABOVE
NO. Column
Unique Symbols — All items with same unique
symbol
(@, #, +, %, or >) in the number column belong to the
same assembly or kit, which is indicated by a note in the
“Remarks” column.
Duplicate Item Numbers — Duplicate numbers indicate
multiple part numbers, which are in effect for the same
general item, such as different size saw blade guards in
use or a part that has been updated on newer versions
of the same machine.
NOTICE
When ordering a part that has more than one item
number listed, check the remarks column for help in
determining the proper part to order.
parts that are sold in bulk and cut to length.
Column.
REMARKS Column
to describe the item can also be shown.
Assembly/Kit — All items on the parts list with the
purchased.
Indicated by:
“INCLUDES ITEMS W/(unique symbol)”
Serial Number Break
number range where a particular part is used.
Indicated by:
“S/N XXXXX AND BELOW”
“S/N XXXX AND ABOVE”
“S/N XXXX TO S/N XXX”
Specifi c Model Number Use
is used only with the specifi c model number or model
number variant listed. It can also be used to show a
variant.
Indicated by:
Numbers Used — Part numbers can be indicated by a
number, a blank entry, or TBD.
TBD (To Be Determined) is generally used to show a
part that has not been assigned a formal part number
at the time of publication.
A blank entry generally indicates that the item is not sold
separately or is not sold by Multiquip. Other entries will
be clarifi ed in the “Remarks” Column.
“XXXXX ONLY”
“NOT USED ON XXXX”
“Make/Obtain Locally” — Indicates that the part can
be purchased at any hardware shop or made out of
and certain washers and nuts.
“Not Sold Separately”
for sale through Multiquip.
PAGE 20 — MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12)
MGX SERIES VIBRATORS
1 to 3 units
Qty. P/N Description
3 247458690 CARBON BRUSH 6X8
NOTICE
Part numbers on this Suggested Spare Parts list may
supersede/replace the part numbers shown in the
following parts lists.
SUGGESTED SPARE PARTS
MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12) — PAGE 21
MOTOR ASSY.
PAGE 22 — MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12)
6+&^* FLEXIBLE SHAFT ...........................................1................NOT SOLD SEPARATELY
MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12) — PAGE 27
TERMS AND CONDITIONS OF SALE — PARTS
PAYMENT TERMS
5. Par ts must be in new and resalable
Multiquip reserves the right to quote and
who use our products as integral parts of their
LIMITATIONS OF SELLER’S LIABILITY
liable for loss of profi t or good will or for any
connection with the sale of its products. Apart
statutory, which extend beyond the description
Terms of payment for parts are net 30 days.
FREIGHT POLICY
All parts orders will be shipped collect or
prepaid with the charges added to the invoice.
All ship ments are F.O.B. point of origin.
Multiquip’s responsibility ceases when a
signed manifest has been obtained from the
carrier, and any claim for shortage or damage
must be settled between the consignee and
the carrier.
MINIMUM ORDER
The minimum charge for orders from Multiquip
is $15.00 net. Customers will be asked for
instructions regarding handling of orders not
meeting this requirement.
RETURNED GOODS POLICY
Return shipments will be acce pted and
credit will be allowed, subject to the following
provisions:
1. A Returne d Material Autho riza tion
must be approved by Multiquip prior to
shipment.
2. To obtain a Return Material Authorization,
a list must be provided to Multiquip
Parts Sales that defi nes item numbers,
quantities, and descriptions of the items
to be returned.
a. The parts numbers and descriptions
b. The list must be typed or computer
c. The list must state the reason(s)
d. The list must reference the sales
e. The list must include the name
3. A copy of the Return Material Authorization
must accompany the return shipment.
4. Freight is at the sender’s expense. All
parts must be returned freight prepaid to
Multiquip’s designated receiving point.
must match the current parts price
list.
generated.
for the return.
ord e r ( s) or i nvo i c e (s ) u n d er
which the items were originally
purchased.
and phone number of the person
requesting the RMA.
co ndit ion, in th e origin al Multiq uip
package (if any), and with Multiquip part
numbers clearly marked.
6. The following items are not returnable:
a. Obsolete parts. (If an item is in the
price book and shows as being
replaced by anoth er item, it is
obsolete.)
b. Any parts with a limited shelf life
(such as gaskets, seals, “O” rings,
and other rubber parts) that were
purchased more than six months
prior to the return date.
c. Any line item with an extended
deal e r net pric e of less th an
$5.00.
d. Special order items.
e. Electrical components.
f. Paint, chemicals, and lubricants.
g. Decals and paper products.
h. Items purchased in kits.
7. The sender will be notifi ed of any material
received that is not acceptable.
8. Suc h materi al will be held for five
working days from notifi cation, pending
instructions. If a reply is not received
within five days, the material will be
returned to the sender at his expense.
9. Credit on returned parts will be issued
at dealer net price at time of the original
pur ch a s e, le s s a 15 % resto c ki n g
charge.
10. In cases where an item is accepted, for
which the original purchase document
can not be determined, the price will be
based on the list price that was effective
twelve months prior to the RMA date.
11. Credit issued will be applied to future
purchases only.
PRICING AND REBATES
Prices are subject to change without prior
notice. Price changes are effective on a
specifi c date and all orders received on or
after that date will be billed at the revised price.
Rebates for price declines and added charges
for price increases will not be made for stock
on hand at the time of any price change.
sell direct to Government agencies, and to
Original Equipment Manufacturer accounts
own products.
SPECIAL EXPEDITING SERVICE
A $35.00 surcharge will be added to the
invoice for special handling including bus
shipments, insured parcel post or in cases
where Multiquip must personally deliver the
parts to the carrier.
Multiquip shall not be liable hereunder for
damages in excess of the purchase price of
the item with respect to which damages are
claimed, and in no event shall Multiquip be
other special, consequential or incidental
damages.
LIMITATION OF WARRANTIES
No warran ties, express or im pli ed, are
made in connection with the sale of parts or
trade accessories nor as to any engine not
manufactured by Multiquip. Such warranties
made in connection with the sale of new,
complete units are made exclusively by a
statement of warranty packaged with such
units, and Multiquip neither assumes nor
auth orize s any person to assume for it
any other obligation or liability whatever in
from such written statement of warranty,
there are no warranties, express, implied or
of the products on the face hereof.
Effective: February 22, 2006
PAGE 28 — MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12)
NOTES
MGX SERIES • OPERATION AND PARTS MANUAL — REV. #0 (03/26/12) — PAGE 29
Multiquip Inc
of their respective owners and used with permission.
This manual
The information and specifications included in this publication were in effect at the time of approval for printing. Illustrations, descriptions, references and technical data contained in
this manual are for guidance only and may not be considered as binding. Multiquip Inc. reserves the right to discontinue or change specifications, design or the information published
in this publication at any time without notice and without incurring any obligations.
PLEASE HAVE THE MODEL AND SERIAL
NUMBER ON-HAND WHEN CALLING
United StateS
Multiquip Corporate OfficeMQ Parts Department
18910 Wilmington Ave.
Carson, CA 90746
Contact: mq@multiquip.com
, the MQ logo are registered trademarks of Multiquip Inc. and may not be used, reproduced, or altered without written permission. All other trademarks are the property
MUST accompany the equipment at all times. This manual is considered a permanent part of the equipment and should remain with the unit if resold.
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