Worker WKG180T User manual

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Concrete Grinding Machine
WKG180T Operator’s Manual
Electric Model

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SAFETY INSTRUCTION
Before using a new grinder
⚫Please read the operator’s manual carefully and make sure
you understand the instruction before using the machine
⚫WKG450 is designed for concrete floor grinding,
flattening out concrete floors,surface removal of glue/
adhesive residues and putty.
⚫The machine can cause serious personal injury.Read
the safety instruction carefully.Learn how to use the
machine
⚫Only staff the have received the necessary education,
both practically and theoretically concerning their usag
e should operate the machinery
Always use common sense
It is not possible to cover every conceivable situation you can
face. Always exercise care and use your common sense.Avoid
all situations which you consider to be beyond your capability. If
you still feel uncertain about operating procedures after reading
these instructions, you should consult an expert before
continuing.
Do not hesitate to contact your dealer if you have any more
questions about the use of the machine. We will willingly be of
service and provide you with advice as well as help you to use
your machine both efficiently and safely.
Let your WORKER dealer regularly check the machine and
make essential adjustments and repairs.
All information and data in the Operator’s Manual were
applicable at the time the Operator’s Manual was sent to print.
Personal protective equipment
• Protective helmet
• Hearing protection
• Protective goggles or a visor
• Breathing mask
• Heavy-duty, firm grip gloves
• Tight-fitting, heavy-duty and comfortable clothing that
permits full freedom of movement.
• Boots with steel toe-caps and non-slip sole.
• Always have a first aid kit nearby.

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Operating Dimension
WKG180T Electric Model
Model
WKG180T
Length
670mm
Width
540mm
Height
650mm
Weight
99 lbs/45kg
Note :All dimensions and weight are all for reference only and subject to change at any time
HOW TO ORDER REPAIR PARTS
To insure product safety and reliability, always use
replacement parts when making repairs to the equipment.
When ordering parts, please specify the MODEL and SERIAL
NUMBER of the machine as given on the NAMEPLATE. In
addition, give part number, description and quantity as listed
on the parts list.
Please note: Due to improvements and changes in the equipment
the illustrations shown may be different from the actual
Machine.

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Diamonds Selection
Diamond
Diamond abrasives usually consist of 2 components,
⚫Diamond power (also known as diamond crystals or grit)
⚫A binding agent
The following are general rules regarding diamond segments in grinding applications
A.Diamond grit size
Changing the size of the diamond grit to a smaller particle/grit size will effect the performance of the
diamond tool in the following ways
⚫Create a finer scratch pattern
⚫Increase life of diamond tool
The opposite will occur when changing to a larger particle/grit size
B.Binding agent
Increasing hardness of bond will:
⚫Create a finer scratch pattern
⚫Increase life of diamond tool
⚫Decrease production rate
The opposite will occur when making the metal or resin bond softer
Determining the hardness of concrete
Generally, the higher the compressive strength rating, the harder the concrete and therefore, the
harder it will be to grind
However, other factors beside compressive strength ratings determine how hard the floor will be, and
therefore, the correct diamond selection. Since grinding normally only deals with the surface of
concrete (top 5mm or 1/4 inch),often the way the concrete floor has been finished or the condition of
the surface will have a greater bearing on what type of diamond to select ,rather than the
compressive strength rating of the concrete
Surface factors to consider when making a diamond selection.
Generally, if concrete surface is very smooth (i.e.Most likely it has been heavily troweled/
helicoptered),the concrete will behave as if it has a high compressive strength and
therefore,require a soft bond segment.
Accordingly if concrete surface is coarse/aggressive (e.g.rain-damage,shot blast,scarified,exposed
aggregate e.t.c.) the concrete will behaves as if it has low compressive strength and
therefore,requires hard bond segment Surface coatings/contaminants (e.g. Epoxy coatings,ceramic
tile adhesives,leveling compounds/screeds) will often have a larger bearing on what diamond to
select,than will the compressive strength of the concrete.

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Operating Instruction
Cup wheels layout
1pc 7inch grinding cup wheel, Use wrench to fixed the motor, then set grinding
cup wheel.
Attach the skirt
Adjust the rubber skirt to be in contact with the floor to
ensure efficient dust collection.
Connect the vacuum cleaner
Make sure that the filters in the vacuum cleaner are intact
and clean. Pay attention to dust during operation.
Transport
The machine can be folded to minimize space needed for transport.
Carefully fold the machine forward. Put padding between
the motor and the electric box to prevent damage to the machine

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Select the correct grit size diamonds for your application
Please refer to the following suggestion cover the basic configuration of WORKER diamond cup
wheels(medium metal bond)
Applications
Grit size
flatten floor,
ceramic tile adhesive,
epoxy paint removal,
rain damaged concrete,
grinding to exposed aggregate in concrete,
flatten undulation in concrete floor
# 30/40
Surface polishing of concrete floors
# 60/80,#80/100
Start and Stopping
Wear personal protective equipment. See instructions under the heading ”Personal protective equipment”.
Perform Pre-Start Check
⚫Visually inspect the equipment for wear or damage
⚫Be sure all guards are in place and functional properly,Do not operate unless all guards are in
place and secure
⚫Perform all daily maintenance

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⚫Inspect accessories -Be sure the correct accessory is install properly on the machine,mounting
arrangement and its intended use
⚫Inspect work area to determine the presence and location of deck inserts,pipes,columns and
objects producing from the slab surface so that they may be avoided during the grinding
operation.
⚫Plug power supply to the grinder
Starting
⚫Press the start button and keep it pressed a few seconds to start the machine (electric motor
model)
⚫Lean back slightly on the handle to get the cup wheels off the surface and start the machine,idle
the machine firstly in approximately 20 seconds,then lower the machine to the surface and do a
short touch pass on the concrete.
Then you are ready to grind,rotate the handle to adjust the height&depth of the grinding wheels
Stopping
⚫Use the stop button to shut down the machine.
⚫Keep grinding segments in contact with the floor when stopping. This will help bring the machine
to a complete stop quickly. Do not lift the grinding head off the floor when stopping as this can
create a significant amount of dust in the air.

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MAINTENANCE
Faults and trouble shooting
The machine will not run
• Check the power supply and the power cables and
make sure that they are not damaged.
• Check that the emergency stop button is not pressed
by turning it clockwise.
Machine is hard to hold onto
• Not enough diamonds under the machine (if grinding
thick glue or soft floors, too few diamonds under the
Machine will greatly increase the load on grinder and
operator).Usually also accompanied by high current draw by
motor.increase number of diamonds under machine to
reduce load on grinder and operator.
Machine is jumping around
• Rubber shock absorber pads in grinding unit may be
worn out or damaged. Check and change if necessary.
• Diamonds may not be fitted correctly or have different
heights. Check to ensure all diamonds are fitted
Correctly and are the same height.
The machine stops after just a while
• The machine is overloaded and the overload
protection has been released. Reduce load. The
machine will reboot after about a minute when the
motor has cooled off.
The machine stops during start-up
• The electric motor has been overloaded or a phase is
missing. Allow the machine one or two minus to reset
and try again. When this does not help, contact an
authorized service workshop.
Cleaning
A Always pull out the plug from the outlet socket before
cleaning, maintenance or assembly.
Always clean all the equipment at the end of the working
da day
Do not use a high pressure washer to clean the machine.
In order for the machine to always be cooled sufficiently
the cooling air openings must be kept clear and clean.
Rubber shock absorber pads
Check the rubber shock absorbing pads every month.
Replace if necessary.
Electrical Feed
Check that the cord and extension cord are intact and in
good condition.Never use the machine if the cord is
damaged, hand it in to an authorized service workshop for
repair.
Skirt
Make sure that the rubber skirt is intact and clean and that
it seals tightly against the floor. Damaged rubber skirt
should always be replaced.
Service