YATO YT-81983 Manual De Instrucciones página 16

EN
the spindle with one spanner and tightening the drill bit with the other spanner (VII).
To disassemble the drill bit, unscrew it with the spindle spanner held in place by the other spanner.
Perform drill bit installation and disassembly using hand spanners. The drill bit will tighten during drilling, which may mean that
disassembling the drill bit will require more force than the installation.
Cooling water connection
Caution! Use only water for cooling. It is forbidden to use other liquids. The water for cooling should be clean, free from any
impurities which could restrict or block the water fl ow.
Whenever possible, drill with water cooling. This will prolong the operation of drill bits and core drill, as well as reduce the amount
of dust generated during operation. Check that the product water valve is closed (VIII). Slide the hose with the internal diameter
specifi ed in the technical data table onto the valve port (IX). Check that the hose does not automatically slide off during operation.
Secure the connection with a clamp if necessary. Do not tighten the clamp too much to avoid damaging the hose.
Open the water supply to the product valve. Water to the water connection must be supplied at a pressure not higher than
specifi ed in the technical data table. Check that the connection of the hose to the valve port does not show any signs of leakage.
The valve is opened and closed by means of a lever (X). If the lever is perpendicular to the water connection port, the valve is
closed. Lever in any other position means the valve is open. The valve is fully open when the valve lever is parallel to the port.
Check that the water comes out of the outlet nozzle.
Caution! If the end of the drill bit is higher during operation than the end of the spindle, e.g. when drilling in the ceiling,
ensure that water does not fl ow towards the core drill. The core drill is not sealed and contact of water with the product
electrical systems can lead to electrocution, which can lead to serious injuries or death.
In this case, do not use water cooling for drilling or use an external device for collecting excess water (available separately)
connected to an industrial vacuum cleaner designed for wet work (available separately).
The water supply system should be routed in such a way that it does not interfere in any manner with the operation of the product
and access to the handle, holders and power switch.
Residual current circuit breaker (PRCD) test
The product is equipped with an automatic residual current circuit breaker connected to the power cord near the plug. Every time
before starting work, test its operation. Check that the tool power switch is in the "off " position, the drill bit has been disassembled
and the spindle does not come into contact with any object. Plug the power cord plug into the mains socket. Press the button
marked "TEST" on the PRCD circuit breaker housing; the indicator light on the PRCD circuit breaker will go out. Press the button
marked "RESET" and then turn on the product by pressing the power switch; the indicator light should illuminate.
If the indicator light does not go off after pressing the button marked "TEST" or goes off after turning on the product, immediately
stop the product operation, disconnect the power cord plug from the mains socket and hand the product over to the authorised
service centre of the manufacturer.
Caution! It is forbidden to use the product with a damaged residual current circuit breaker.
Turning on the product
Always perform a test run to check the correct operation of the product each time before starting work.
Make sure that the tool power switch is in the "off – O/OFF" position and the power cord plug is unplugged from the mains socket.
Install the drill bit and then connect the water supply. Perform the activities following the above guidelines. Close the water valve.
Make sure that the drill bit does not come into contact with any object; plug the power cord plug into the mains socket.
Press the button marked "RESET" on the residual current circuit breaker and open the water valve.
Move the power switch to the "on - I/ON" position – this will turn on the tool. Allow the product to run for approx. 30 seconds at a
rated rotational speed.
During this time, check whether the drill bit does not show signs of axial run-out, the product does not vibrate, does not generate
excessive noise, or no smoke or suspicious odours are released from the product. Check the water fl ow of the cooling system
for interference.
In case of observing any signs of malfunction, immediately turn off the product, unplug the power cord plug from the socket and
then try to remove the cause of the malfunction. If it is not possible to remove the cause of the malfunction, the product must be
handed over to the authorised service centre of the manufacturer.
It is forbidden to work with malfunctioning product or product that is damaged.
Turning off the product
Turn off the product in the following order.
Move the power switch to the "off – O/OFF" position.
Wait until the drill bit stops rotating. Close the water valve. Unplug the power cord plug from the mains socket. Disconnect the
water supply system from the product. Open the product water valve and allow the rest of the water to escape from the product.
Remove the drill bit and proceed with the product maintenance.
Operation
Before commence of the work always prepare the operation place.
O R I G I N A L I N S T R U C T I O N S
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