English
8.How to use the drill bit (taper shank) and the taper shank adapter
(1)Mount the taper shank adapter to the hammer drill. (Fig. 18)
(2)Mount the drill bit (taper shank) to the taper shank adapter. (Fig. 18)
(3)Turn the switch ON, and drill a hole in prescribed depth.
(4)To remove the drill bit (taper shank), insert the cotter into the slot of the taper shank adapter and strike the head of the cotter with a hammer supporting on a rests. (Fig. 19)
LUBRICATION
Low viscosity grease is applied to this hammer drill 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 form loosened screw.
Further use of the hammer drill 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.
MAINTENANCE AND INSPECTION
1.Inspecting the drill bits
Since use of a dull tool will cause motor malfunctioning and degraded efficiency, replace the drill 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. 20)
The motor employs carbon brushes which are consumable parts. When they become worn to or near “wear limit”, it could result in motor trouble. When an
At that time, replace both carbon brushes with new ones which have the same carbon brush numbers shown in Fig. 20.
In addition, always keep carbon brushes clean and ensure that they slide freely within the brush holders.
5.Replacing a carbon brush (Fig. 21)
◯Disassembling
(1)Loosen the three screws on the handle cover, and remove the handle cover.
(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 brush terminal, and remove the carbon brush from the brush holder.
◯Reassembling
(1)Place a new carbon brush into the brush holder, and connect the brush terminal to the carbon brush.
(2)Return the brush holder and other parts to their original positions, as illustrated in Fig. 21.
(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.
(4)Replace the handle cover, while being careful to ensure it does not pinch the lead wire, and secure it firmly with the three screws.
CAUTION
Should the lead wire be pinched by the handle cover or come in contact with the armature or rotating parts of the motor, a serious danger of electric shock to the operator will be created. Excercise extreme caution in disassembling and reassembling the motor, following the above procedures exactly.
Do not attempt to disassemble any parts other than those necessary to effect replacement of the carbon brush.
NOTE:
Due to HITACHI’s continuing program of research and development, the specifications herein are subject to change without prior notice.
IMPORTANT
Correct connection of the plug
The wires of the mains lead are coloured in accordance with the following code:
Blue:
Brown:
As the colours of the wires in the mains lead of this tool may not correspond with the coloured markings identifying the terminals in your plug proceed as follows: The wire coloured blue must be connected to the terminal marked with the letter N or coloured black. The wire coloured brown must be connected to the terminal marked with the letter L or coloured red. Neither core must be connected to the earth terminal.
NOTE:
This requirement is provided according to BRITISH STANDARD 2769: 1984.
Therefore, the letter code and colour code may not be applicable to other markets except The United Kingdom.
Information concerning airborne noise and vibration
The measured values were determined according to EN50144.
The typical
The typical sound power level: 103 dB (A).
Wear ear protection.
The typical weighted root mean square acceleration value: 8.0 m/s2.
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