Maintenance And Inspection - Hitachi Koki DH 40MR Instrucciones De Manejo

English
APPLICATIONS
○ Drilling holes in concrete
○ Drilling anchor holes
○ Crushing concrete, chipping, digging, and squaring (by
applying optional accessories)
SPECIFICATIONS
Voltage (by areas)*
Power input*
No load speed
Full-load Impact Rate
Capacity
Weight (without cord,
side handle)
* Be sure to check the nameplate on product as it is
subject to change by areas.
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
Mounting the tool
Regulating the number of rotations
and hammering
Setting up work mode
How to drill holes
How to chisel or demolish
Adjustment of the tool position mode
Install the stopper
Switch operation
Using taper shank adapter
Removing taper shank adapter
Using drill chuck and chuck adapter
Mounting core bit
Mounting guide plate and center pin
How to dismount the core bit
Replacing the grease
Replacing carbon brushes
Selecting accessories*
* For detailed information regarding each tool, contact a
Hitachi authorized service center.
Warming up
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.
(110 V, 115 V, 120 V, 127 V,
220 V, 230 V, 240 V)
950 W
240 – 480 min
-1
1320 – 2650 min
-1
Drill bit: 40 mm
Core bit: 105 mm
6.5 kg
Figure Page
1 103
2 103
3 103
4 103
5 103
6 104
7 104
8 104
9 104
10 104
11 104
12 105
13 105
14 105
15 105
16 105
– 106, 107
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 machine is of full air-tight construction to protect
against dust and to prevent lubricant leakage. Therefore, the
machine can be used without lubrication for long periods.
Replace the grease as described below.
1. Grease replacement period
After purchase, replace grease after every 6 months of
usage. Ask for grease replacement at the nearest Hitachi
Authorized Service Center. Proceed for replacement of
grease.
2. Grease replenishment
CAUTION
Before replenishing the grease, turn the power off and
pull out the power plug.
(1) Remove the crank cover and wipe off the grease inside.
(Fig. 15)
(2) Supply 30 g of Hitachi Electric Hammer Grease A
(Standard accessory, contained in tube) to the crank
case.
(3) After replenishing the grease, install the crank cover
securely.
NOTE
The Hitachi Electric Hammer Grease A is of the low
viscosity type. If necessary purchase from an Hitachi
Authorized Service Center.

MAINTENANCE AND INSPECTION

1. Inspecting the drill bits
Since use of as dull tool will degrade effi ciency 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 (Fig. 16)
The Motor employs carbon brushes which are
consumable parts. When they become worn to or near
the "wear limit" ⓐ, it results 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 Numbers ⓑ shown in the Fig. 16. In addition,
always keep carbon brushes clean and ensure that they
slide freely within the brush holders.
5. Replacing carbon brushes (Fig. 16)
Loosen the two set screws and remove the tail
cover. Remove the brush caps and carbon brushes.
After replacing the carbon brushes, tighten the brush
caps securely and install the tail cover with securely
tightening two set screws.
CAUTION
In the operation and maintenance of power tools, the
safety regulations and standards prescribed in each
country must be observed.
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