Worker WKG280 User manual

Concrete Grinding Machine
WKG280 Operator’s Manual
Gasoline/Electric Model

Operating Dimension
WKG280 Electric Model
Model WKG280
Length 900mm
Width 690mm
Height 770mm
Weight 143 lbs/85kg
Note :All dimensions and weight are all for reference only and subject to change at any time

Operating Instruction
Cup wheels layout
A.3pcs grinding shoes
B.3pcs 4inch grinding cup wheel
C.1 pc 10inch grinding cup wheels
Choose one type when it works.

Connect the vacuum cleaner
Make sure that the filters in the vacuum cleaner are intact
and clean. Pay attention to dust during operation.
Attach the skirt
Adjust the rubber skirt to be in contact with the floor to
ensure efficient dust collection.
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

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
 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.
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.
 Reduce the pressure between grinding disc and floor by pushing down on the handle without
raising the grinding off the ground
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.

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.