VEVOR 250D User manual

Concrete Grinding Machine
250D Operator’s Manual
Electric Model

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
WKG250D 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
• 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.

SAFETY INSTRUCTION
Use and care
• Only use the machine for the purpose it was
intended for.
• Keep all parts in good working order and ensure
that all fixtures are properly tightened.
• Never use a machine that is faulty. Carry out the
checks,maintenance and service instructions
described in this manual. Some maintenance
and service measures must be carried out by
trained and qualified specialists.See instructions
under the heading Maintenance.
• Do not modify safety equipment.Check regularly
that they function as they should. The machine
must not be run with defective or disassembled
safety equipment.
• Never use a machine that has been modified in
any way from its original specification.
• Machinery should only be started when grinding
Heads are resting on the ground unless carrying
out a testing procedure as outlined in this
manual.
• The machine should not be started without the
rubber dust skirt attached. It is essential a good
seal between machine and floor be established
for safety, especially when operating in dry
grinding applications.
• During grinding, the machine must be
connected to a vacuum cleaner to sucking off
the dust.
• When changing the grinding discs ensure power
supply to the unit is OFF by engaging the Stop
Button and the power-plug disconnected.
•
After each grinding/polishing operation always
remove the diamond tools.
•
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
•
The grinding disc continues to rotate for some
time after the motor has stopped. Maintain
grinding action until the fan has come to a
complete stop. Make sure the grinding head
has stopped rotating before raising the machine.
•
When removing glue, asphalt, paint etc. always
raise the machine from the surface after use to
prevent it from sticking to the floor due to the
heat. Make sure the grinding head has stopped
rotating before raising the machine.
• Diamond tools may be very hot after use. Leave machine
to cool off before removing the diamond segments. Use
protective gloves.
• Always use the machine mounted lifting eye when lifting.
• Always carry the machine by the carrying handle and the
handle.
Transport and storage
• The machine should be transported under cover where
possible, limiting the exposed to natural elements – in
particular rain and snow.
• Store the equipment in a lockable area so that it is out of
reach of children and unauthorized persons.
• The machine should always be stored in a dry place when
not in use.

Operating Dimension
WKG250D Electric Model
Model WKG250D
Length 740mm
Width 420mm
Height 850mm
Weight 68kg
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.
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.
Operating Instruction
Cup wheels layout
1. 1pc 10inch grinding cup wheel
2. 3pcs 4inch trapezoid
Connect the vacuum cleaner
Make sure that the filters in the vacuum cleaner are intact
and clean. Pay attention to dust during operation.

Level and water cooling
Adjustable
Removable shroud for edge grinding
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

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
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.
Service