Specifications; Grease Replacement; Maintenance And Inspection - Hitachi DH 40MEY Handling Instructions Manual

English
APPLICATIONS
Rotation and hammering function
○ Drilling anchor holes
○ Drilling holes in concrete
Hammering only function
○ Crushing concrete, chipping, digging, and squaring
(by applying optional accessories)

SPECIFICATIONS

The specifi cations of this machine are listed in the Table on
page 102.
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
About the power lamp
Speed change
Install the stopper
Using tapershank adapter
Removing tapershank adapter
Mounting core bit
Mounting guide plate and center pin
Selecting accessories*
* For detailed information regarding each tool, contact a
Hitachi authorized service center.
Warming up (Fig. 13)
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.
ABOUT THE PROTECTION
FUNCTION
This tool has a built-in protection circuit for preventing
damage to the unit in the event of an abnormality. Depending
on the nature of the abnormality, the display lamp will fl ash
as shown in Table 1 and the unit will cease to operate. In
such cases, verify the problem indicated by the fl ashing and
take whatever steps are necessary to correct the problem.
NOTE
Repair may be required if the display lamp continues to
fl ash after taking all necessary steps to correct the problem.
If the problem persists, please arrange for repairs.
Display
fl ashing
Flash
Flash
Flash
Figure Page
1 103
2 103
3 103
4 103
Flash
5 103
6 104
7 104
8 104

GREASE REPLACEMENT

9 105
10 105
This Rotary Hammer is of full air-tight construction to protect
11 105
against dust and to prevent lubricant leakage.
Therefore, this Rotary Hammer can be used without
12 105
lubrication for long periods. Replace the grease as described
– 106, 107
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 drill bits
2. Inspecting the mounting screws
3. Maintenance of the motor
4. Replacing supply cord
4
Table 1
lamp Cause
Internal temperature
has risen beyond
the unit's specifi ed
temperature.
(Temperature
increase protection
function)
Excessive pressure
applied to the tool
has resulted in an
overload.
(Overload
protection function)
Tool is connected
to a power source
whose voltage is
either too high or
too low.
(Circuit protection
function)
Sensor signal read
error.
(Control monitoring
function)
Since use of a dull tool will cause motor malfunctioning
and degraded effi ciency, replace the drill bit with new
ones or resharpen them without delay when abrasion is
noted.
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.
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.
If the replacement of the supply cord is necessary, this
has to be done by the manufacturer of this agent in order
to avoid a safety hazard.
Solution
Turn off the unit and
allow it to cool down
for about 15 minutes.
When the temperature
goes down, the display
lamp will stop fl ashing
and remain lit to
indicate that the unit is
ready for use.
Press the rotation
speed selector switch
to recover. Try to avoid
tasks that will apply
excess pressure to
the unit.
Connect the unit to a
power supply matching
the input voltage
specifi ed on the
nameplate. Press the
rotation speed selector
switch to recover.
Press the rotation
speed selector switch
to recover. Repair may
be required if this error
continuously occurs.