Hitachi H45MR-NF [6/45] English
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Hitachi H45MR-NF [6/45] English

Hitachi H45MR-NF [6/45] English
5
English
HOW TO USE THE DEMOLITION HAMMER
(Fig. 4)
1. After placing the tip of the tool on concrete surface,
switch ON.
2. By utilizing the weight of the machine and by firmly
holding the hammer with both hands, one can
effectively control the subsequent recoil motion.
Proceed at a moderate work-rate, the use of too
much force will impair efficiency.
CAUTION
After long time of use, the cylinder case becomes
hot. Therefore, be careful not to burn your hands.
GREASE REPLACEMENT
This machine is of full air-tight construction to protect
against dust and to prevent lubricant leakage. This
machine can be used without grease supplement for an
extended period of time. However, perform the grease
replacement to maintain the service life. Replace the
grease as described below.
1. Grease Replacement Period
You should look at the grease when you change
the carbon brush. (See item 4 in the section
MAINTENANCE AND INSPECTION.) Ask for grease
replacement at the nearest authorized Hitachi Service
Center.
In the case that you are forced to change the grease
by yourself, please follow the following points.
2. How to replace grease
CAUTION:
Before replacing the grease, turn the power off and
pull out the plug from the receptacle.
(1) Remove the crank cover and wipe off the old grease
inside. (Fig. 5)
(2) Supply 27 g (the standard volume to cover the
connecting rod) of Hitachi Electric Hammer Grease
A to the crank case.
(3) After replacing the grease, install the crank cover
securely.
NOTE:
The Hitachi Electric Hammer Grease A is of the low
viscosity type. When the grease is consumed,
purchase from an authorized Hitachi Service
Center.
MAINTENANCE AND INSPECTION
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.
APPLICATIONS
Breaking concrete, chipping off concrete, grooving, bar
cutting, and driving piles.
Application examples:
Installation of piping and wiring, sanitary facility
installation, machinery installation, water supply and
drainage work, interior jobs, harbor facilities and other
civil engineering work.
PRIOR TO OPERATION
1. Power source
Ensure that the power source to be utilized conforms
to the power requirements specified on the product
nameplate.
2. Power switch
Ensure that the power switch is in the OFF position.
If the plug is connected to a receptacle while the
power switch is in the ON position, the power tool
will start operating immediately, which could cause
a serious accident.
3. Extension cord
When the work area is removed from the power
source, use an extension cord of sufficient thickness
and rated capacity. The extension cord should be
kept as short as practicable.
4. Installing Tools
CAUTION
Be sure to switch power OFF and disconnect the
plug from the receptacle to avoid serious trouble.
NOTE:
When using tools such as bull points, cutters, etc.,
make sure to use the genuine parts designated by
our company.
(1) Clean the shank portion of the tool.
(2) As shown in Fig. 1, pull grip (A) in the direction
of A, and insert the tool into a hole of the front
cap.
(3) Adjust the groove position while turning the tool,
and furthermore insert it until it hits the end of the
hole.
(4) Return grip (A) to its original position, pull the tool
and make sure it is locked completely. (Fig. 2)
5. Deciding Working Position of Tool
The tool can be turned every 30 degrees and can
be fixed at the position of 12 steps.
(1) As shown in Fig. 3, if the grip (A) is turned in the
direction of B in a state where the grip (B) is
pushed in the direction of A, the blade angle can
be changed freely to any desired position.
(2) Release grip (B) and turn the tool, and make sure
that it is locked completely.
6. Removing Tool
As shown in Fig. 1, pull grip (A), and pull out the
tool.
CAUTION
Be sure to grip the handle and side handle or grip
(C) portion during work. Do not hold by the grip
(A) during work. If you pull it by mistake, the bull
point could jump out.
01Eng_H45MRY_EE 6/22/07, 15:455

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English APPLICATIONS Breaking concrete chipping off concrete grooving bar cutting and driving piles Application examples Installation of piping and wiring sanitary facility installation machinery installation water supply and drainage work interior jobs harbor facilities and other civil engineering work PRIOR TO OPERATION 1 Power source Ensure that the power source to be utilized conforms to the power requirements specified on the product nameplate 2 Power switch Ensure that the power switch is in the OFF position If the plug is connected to a receptacle while the power switch is in the ON position the power tool will start operating immediately which could cause a serious accident 3 Extension cord When the work area is removed from the power source use an extension cord of sufficient thickness and rated capacity The extension cord should be kept as short as practicable 4 Installing Tools CAUTION Be sure to switch power OFF and disconnect the plug from the receptacle to avoid serious trouble NOTE When using tools such as bull points cutters etc make sure to use the genuine parts designated by our company 1 Clean the shank portion of the tool 2 As shown in Fig 1 pull grip A in the direction of and insert the tool into a hole of the front cap 3 Adjust the groove position while turning the tool and furthermore insert it until it hits the end of the hole 4 Return grip A to its original position pull the tool and make sure it is locked completely Fig 2 5 Deciding Working Position of Tool The tool can be turned every 30 degrees and can be fixed at the position of 12 steps 1 As shown in Fig 3 if the grip A is turned in the direction of in a state where the grip B is pushed in the direction of the blade angle can be changed freely to any desired position 2 Release grip B and turn the tool and make sure that it is locked completely 6 Removing Tool As shown in Fig 1 pull grip A and pull out the tool CAUTION Be sure to grip the handle and side handle or grip C portion during work Do not hold by the grip A during work If you pull it by mistake the bull point could jump out HOW TO USE THE DEMOLITION HAMMER Fig 4 1 After placing the tip of the tool on concrete surface switch ON 2 By utilizing the weight of the machine and by firmly holding the hammer with both hands one can effectively control the subsequent recoil motion Proceed at a moderate work rate the use of too much force will impair efficiency CAUTION After long time of use the cylinder case becomes hot Therefore be careful not to burn your hands GREASE REPLACEMENT This machine is of full air tight construction to protect against dust and to prevent lubricant leakage This machine can be used without grease supplement for an extended period of time However perform the grease replacement to maintain the service life Replace the grease as described below 1 Grease Replacement Period You should look at the grease when you change the carbon brush See item 4 in the section MAINTENANCE AND INSPECTION Ask for grease replacement at the nearest authorized Hitachi Service Center In the case that you are forced to change the grease by yourself please follow the following points 2 How to replace grease CAUTION Before replacing the grease turn the power off and pull out the plug from the receptacle 1 Remove the crank cover and wipe off the old grease inside Fig 5 2 Supply 27 g the standard volume to cover the connecting rod of Hitachi Electric Hammer Grease A to the crank case 3 After replacing the grease install the crank cover securely NOTE The Hitachi Electric Hammer Grease A is of the low viscosity type When the grease is consumed purchase from an authorized Hitachi Service Center MAINTENANCE AND INSPECTION 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 property 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 5

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