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Hitachi g 12 sr Manual

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English
CAUTION
When the machine is not in use, the power source
should be disconnected.
ASSEMBLING AND DISASSEMBLING THE
DEPRESSED CENTER WHEEL (Fig. 2)
CAUTION: Be sure to switch OFF and disconnect the
attachment plug from the receptacle to avoid
a serious accident.
1. Assembling (Fig. 2)
(1) Turn the equipment upsidedown so that the
spindle will be facing up.
(2) Mount the wheel washer onto the spindle.
(3) Fit the protuberance of the depressed center wheel
onto the wheel washer.
(4) Screw from above the wheel nut onto the spindle.
(5) As shown in Fig. 2, push in the lock pin to
prevent rotation of the spindle. Then, secure the
depressed center wheel by tightening the wheel
nut with the wrench.
2. Disassembling
Follow the above procedures in reverse.
CAUTIONS:
⅜ Comfirm that the depressed center wheel is mounted
firmly.
⅜ Confirm that the lock pin is disengaged by pushing
lock pin two or three times before switching the
power tool on.
MAINTENANCE AND INSPECTION
1. Inspecting the depressed center wheel
Ensure that the depressed center wheel is free of
cracks and surface defects.
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. Fail-
ure to do so could result in serious hazard.
3. Inspecting the carbon brushes (Fig. 3)
The motor employs carbon brushes which are
consumable parts. Since an excessively worn car-
bon brush can result in motor trouble, replace the
carbon brush with a new one having the same
carbon brush No. shown in the figure when it
becomes worn to or near the “wear limit”. In
addition, always keep carbon brushes clean and
ensure that they slide freely within the brush holders.
4. Replacing carbon brushes:
Disassemble the brush caps with a slotted-head
screwdriver. The carbon brushes can then be easily
removed.
5. 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.
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 main lead are coloured in accordance
with the following code:
Blue: -Neutral
Brown: -Live
As the colours of the wires in the main lead of this tool
may not correspond with the coloured markings identify-
ing 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 mark-
ed 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 A-weighted sound pressure level: 90 dB (A).
The typical A-weighted sound poweer level: 103 dB (A).
Wear ear protection.
The typical weighted root mean square acceleration
value does not exceed 2.5 m/s
2
.
… 6 …


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