(4) Application of excessive force will not only expedite the work, but will deteriorate the tip edge of the drill bit,
resulting in reduced service life of the hammer drill.
3. How to dismount the core bit (Fig. 16)
Remove the core bit shank from the rotary hammer, hold the core bit with one hand, and strongly strike the head
of the SDS plus shank portion of the core bit shank (20) with a manual hammer two or three times, whereby the
round head screw is loosened and the rotary hammer is ready for disassembly.
Low viscosity grease is applied to this rotary hammer so that it can be used for a long period without replacing the
grease. Please contact the nearest service center for grease replacement when any grease is leaking from
loosened screw.
Further use of the rotary hammer with lock off grease will cause the machine to seize up reduce the service life.
CAUTION:
A special grease is used with this machine, therefore, the normal performance of the machine may be badly
affected by use of other grease. Please be sure to let one of our service agents undertake replacement of the
grease.
1. Inspecting the tool
Since use of a dull tool will degrade efficiency and cause possible motor malfunction, sharpen or replace the tool
as soon as abrasion is noted.
2. Inspecting the mounting screws
Regularly inspect all mounting screws and ensure that they are properly tightened. Should any of the screws be
loose, retighten them immediately. Failure to do so could result in serious hazard.
3. Maintenance of the motor
The motor unit winding is the very "heart" of the power tool. Exercise due care to ensure the winding does not
become damaged and/or wet with oil or water.
4. Inspecting the carbon brushes
The Motor employs carbon brushes which are consumable parts. When they become worn to or near the "wear
limit", it could result in motor trouble. When an auto-stop carbon brush is equipped, the motor will stop
automatically. At that time, replace both carbon brushes with new ones which have the same carbon brush of
specification with standard. In addition, always keep carbon brushes clean and ensure that they slide freely
within the brush holders.
NOTE: Carbon brush inspection and replacement on this tool should ONLY be performed by an after-sales service
center.
5. Replacing a carbon brush
When the carbon brushes are worn out, the power tool switches itself off. The power tool must then be sent to
an after-sales service agent.
When you have to replacement the carbon brushes by yourself, please following the order :
- Disassembling
(1) Loosen the five screws on the main handle cover, and remove the main handle cove.
(2) Lift out the brush holder together with the carbon brush, while being very careful not to forcibly pull the
lead wires within the brush holder.
(3) Withdraw the insert piece, and remover the carbon brush from the brush holder.
- Reassembling
(1) Place a new carbon brush into the insert piece, and connect the brush terminal to the carbon brush.
(2) Return the brush holder and other parts to their original positions.
(3) Place the lead wire in the specified position. Be very careful not to allow the lead wire to contact the
armature or rotating parts of the motor.
GB
HOW TO REPLACE THE GREASE
MAINTENANCE AND INSPECTION
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