Regularly inspect all mounting screws and ensure that they are properly tightened. Any loose
should be tighten immediately, failure to do maybe cause serious hazard.
3. Inspecting the bit retainer
The retainer may become loose due to excessive use. Make sure the bit shank position is hold
securely, if any wear or damage is found, ask the authorized service people to maintenance.
4. Maintenance the motor
The motor is the heart of the machine, please avoid any damage to the winding, or any water
and oil to wet it.
5. Carbon brush replacements
5.1 Carbon brushes are consumable parts, when it becomes worn or "limit worn" it can cause
motor trouble, we use auto-stop carbon brush, it stopped automatically when carbon brush worn out,
at that time, replace a new couple of them as following procedure:
5.2 When you have to replacement the carbon brushes by yourself, please following the order
：
(1) Loosen the three set screws and remove fan cover,
(2)
Remove the helical spring and carbon brushes.
(3) After replacing the carbon brushes, install the
helical spring and fan cover, with securely tightening
four set screws.
6. Cleaning
Clean the machine regularly with a soft cloth, preferably after each use. Solvent such as
gasoline, thinner, alcohol etc.. These kind of chemical materials are not allowed to use, water or
soap are recommended!
7. Warranty
For the condition of warranty, please refer to the separately provided warranty card.
Environment
Faulty and /or discarded electrical or electronic apparatus have to be collected at
the appropriate recycling location.
