Maintenance And Inspection - Hitachi G 12SE2 Bedienungsanleitung

○ Ensure that sparks resulting from use do not create
a hazard e.g. do not hit persons, or ignite fl ammable
substances.
○ Always use protective safety glasses and hearing
protectors, use other personal protective equipment
such as gloves, apron and helmet when necessary.
○ Always use eye and ear protection.
Other personal protective equipment such as dust
mask, gloves, helmet and apron should be worn when
necessary.
If in doubt, wear the protective equipment.
○ When the machine is not use, the power source should
be disconnected.
ASSEMBLING AND DISASSEMBLING THE
DEPRESSED CENTER WHEEL (Fig. 1)
CAUTION
Be sure to switch OFF and disconnect the attachment
plug from the receptacle to avoid a serious accident.
1. Assembling (Fig. 1)
(1) Turn the disc grinder upsidedown so that the spindle is
facing upward.
(2) Align the across fl ats of the wheel washer with the
notched part of the spindle, then attach them.
(3) Fit the protuberance of the depressed center wheel onto
the wheel washer.
(4) Screw the wheel nut onto the spindle.
(5) While pushing the push button with one hand, lock the
spindle by turning the depressed center wheel slowly
with the other hand.
Tighten the wheel nut by using the supplied wrench as
shown in Fig. 1.
2. Disassembling
Follow the above procedures in reverse.
CAUTION
○ Comfi rm that the depressed center wheel is mounted
fi rmly.
○ Confi rm that the push button is disengaged by pushing
push button 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. Failure to do so could
result in serious hazard.
3. Inspecting the carbon brushes (Fig. 5)
The Motor employs carbon brushes which are
consumable parts. When they become worn to or near
the "wear limit", it could result 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 fi gure. In addition, always keep
carbon brushes clean and ensure that they slide freely
within the brush holders.
4. Replacing carbon brushes (Fig. 6)
〈Disassembly〉
(1) Loosen the D4 tapping screw retaining the tail cover and
remove the tail cover.
(2) Use the auxiliary hexagonal wrench or small screwdriver
to pull up the edge of the spring that is holding down the
carbon brush. Remove the edge of the spring toward the
outside of the brush holder.
(3) Remove the end of the pig-tail on the carbon brush from
the terminal section of brush holder and then remove the
carbon brush form the brush holder.
〈Assembly〉
(1) Insert the end of the pig-tail of the carbon brush in the
terminal section of brush holder.
(2) Insert the carbon brush in the brush holder.
(3) Use the auxiliary hexagonal wrench or small screwdriver to
return the edge of the spring to the head of the carbon brush.
(4) Mount the tail cover and tighten the D4 tapping screw.
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.
6. Service parts list
A: Item No.
B: Code No.
C: No. Used
D: Remarks
CAUTION
Repair, modifi cation and inspection of Hitachi Power
Tools must be carried out by an Hitachi Authorized
Service Center.
This Parts List will be helpful if presented with the tool to
the Hitachi Authorized Service Center when requesting
repair or other maintenance.
In the operation and maintenance of power tools, the
safety regulations and standards prescribed in each
country must be observed.
MODIFICATIONS
Hitachi Power Tools are constantly being improved
and modifi ed to incorporate the latest technological
advancements.
Accordingly, some parts (i.e. code numbers and/or
design) may be changed without prior notice.
GUARANTEE
We guarantee Hitachi Power Tools in accordance with
statutory/country specifi c regulation. This guarantee does
not cover defects or damage due to misuse, abuse, or
normal wear and tear. In case of complaint, please send
the Power Tool, undismantled, with the GUARANTEE
CERTIFICATE found at the end of this Handling instruction,
to a Hitachi Authorized Service Center.
Information concerning airborne noise and vibration
The measured values were determined according to
EN60745 and declared in accordance with ISO 4871.
Measured A-weighted sound power level: 95 dB (A).
Measured A-weighted sound pressure level: 84 dB (A).
Uncertainty K: 3 dB (A).
Wear hearing protection.
Vibration total values (triax vector sum) determined
according to EN60745.
Surface grinding:
a
Vibration emission value
Uncertainty K = 1.5 m/s
2
English
, = 5.8 m/s
2
h AG
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