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Switching ON
Switching OFF
Disconnect mains plug from electrical outlet
Class II tool
STANDARD ACCESSORIES
In addition to the main unit (1 unit), the package
contains the accessories listed in the below.
○ Plastic case ................................................................ 1
○ Side handle ................................................................. 1
○ Stopper ...................................................................... 1
○ Hammer Grease A ..................................................... 1
Standard accessories are subject to change without notice.
APPLICATIONS
Rotation and hammering function
○ Drilling anchor holes
○ Drilling holes in concrete
Hammering only function
○ Crushing concrete, chipping, digging, and squaring
(Some applications need optional accessories)
SPECIFICATIONS
The specifi cations of this machine are listed in the Table on
page 5.
NOTE
Due to HITACHI's continuing program of research and
development, the specifi cations herein are subject to
change without prior notice.
MOUNTING AND OPERATION
Action
Inserting SDS-max tools
Removing SDS-max tools
Changing tool direction
Selecting the operating mode
Switching on and off
Install the stopper
Using tapershank adapter
Removing tapershank adapter
Mounting core bit
Mounting guide plate and center pin
Replacing carbon brushes
Selecting accessories*
*
For detailed information regarding each tool, contact a
Hitachi authorized service center.
Operate this Rotary Hammer by utilizing its own weight. The
performance will not be better even if it is pressed or thrust
forcibly against the work surface.
Hold this Rotary Hammer with a force just suffi cient to
counteract the reaction.
CAUTION
After long time of use, the cylinder case becomes hot.
Therefore, be careful not to burn your hands.
Warming up (Fig. 12)
The grease lubrication system in this unit may require
warming up in cold regions.
Position the end of the bit so makes contact with the
concrete, turn on the switch and perform the warming
up operation. Make sure that a hitting sound is produced
and then use the unit.
CAUTION
When the warming up operation is performed, hold the
side handle and the main body securely with both hands
to maintain a secure grip and be careful not to twist your
body by the jammed drill bit.
GREASE REPLACEMENT
This Rotary Hammer is of full air-tight construction to protect
against dust and to prevent lubricant leakage.
Therefore, this Rotary Hammer can be used without
lubrication for long periods. Replace the grease as described
below.
Grease Replacement Period
After purchase, replace grease after every 6 months of
usage. Ask for grease replacement at the nearest authorized
Service Center.
MAINTENANCE AND INSPECTION
1. Inspecting the tool bits
Since use of a dull tool will cause motor malfunctioning
and degraded effi ciency, replace the tool bit with new
ones or resharpen them without delay when 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 (Fig. 13)
Figure
Page
The Motor employs carbon brushes which are
2
2
consumable parts. When they become worn to or near
the "wear limit" ⓐ , it results in motor trouble.
3
2
When an auto-stop carbon brush is equipped, the motor
4
2
will stop automatically. At that time, replace both carbon
brushes with new ones which have the same carbon
5
3
brush Numbers ⓑ shown in the Fig. 13. In addition,
6
3
always keep carbon brushes clean and ensure that they
slide freely within the brush holders.
7
3
5. Replacing carbon brushes (Fig. 13)
8
3
Loosen the two set screws and remove the tail cover.
9
4
Remove the brush caps and carbon brushes. After
replacing the carbon brushes, do not forget to tighten the
10
4
brush caps securely and to install the tail cover.
11
4
6. Replacing supply cord
If the replacement of the supply cord is necessary, this
13
5
has to be done by the manufacturer of this agent in order
–
6, 7
to avoid a safety hazard.
CAUTION
In the operation and maintenance of power tools, the
safety regulations and standards prescribed in each
country must be observed.
10
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