Hitachi C 7UR, Handling Instructions Manual

Page: 11 / 84

11
English
CAUTION
When replacing the new carbon brushes, always
use genuine Hitachi carbon brushes with the number
speci fi ed in the drawing.
4. Replacing carbon brushes (Fig. 15)
Disassemble the brush caps with a slotted-head
screwdriver. The carbon brushes can then be easily
removed.
5. Replacing supply cord
If the replacement of the supply cord is necessary, this
has to be done by the manufacturer of this agent in order
to avoid a safety hazard.
6. Motor unit maintenance
The motor winding is an important part of this tool. Avoid
damaging and be careful to avoid contact with cleaning
oil or water.
After 50 hours of use, clean the motor by blowing into the
ventilation holes of the motor housing with dry air from an
air gun or other tool ( Fig. 16 ).
Dust or particle accumulation in the motor can result in
damage.
7. Inspecting and maintaining the lower guard
Always make sure that the lower guard moves smoothly.
In the event of any malfunction, immediately repair the
lower guard.
For cleaning and maintenance, use an air gun or other
tool to blow clean the space between the lower guard
and gear cover as well as the rotation part of the lower
guard with dry air ( Fig. 16 ).
Doing so is e ff ective for the emission of chips or other
particles.
Accumulation of chips or other particles around the lower
guard may result in malfunction or damage.
WARNING
To prevent dust inhalation or eye irritation, wear
protective safety goggles and a dust mask when
using an air gun or other tool to clean the lower guard,
ventilation holes or other parts of the product.
Ensure smooth movement
of lower guard
Rotation part of the
lower guard
Housing vent
Space between lower
guard and gear cover
Air gun
Fig. 16
CAUTION
In the operation and maintenance of power tools, the safety
regulations and standards prescribed in each country must
be observed.
GUARANTEE
We guarantee Hitachi Power Tools in accordance with
statutory/country speci fi 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.
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 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
EN62841 and declared in accordance with ISO 4871.
Measured A-weighted sound power level: 108 dB (A)
Measured A-weighted sound pressure level: 97 dB (A)
Uncertainty K: 3 dB (A).
Wear hearing protection.
Vibration total values (triax vector sum) determined
according to EN62841.
Cutting chipboard:
Vibration emission value
a
h
= 2.7 m/s 2
Uncertainty K = 1.5 m/s
2
The declared vibration total value has been measured in
accordance with a standard test method and may be used
for comparing one tool with another.
It may also be used in a preliminary assessment of exposure.
WARNING
○ The vibration emission during actual use of the power
tool can di ff er from the declared total value depending in
the ways in which the tool is used.
○ Identify safety measures to protect the operator that
are based on an estimation of exposure in the actual
conditions of use (taking account of all parts of the
operating cycle such as the times when the tool is
switched o ff and when it is running idle in addition to the
trigger time).
NOTE
Due to HITACHI’s continuing program of research and
development, the speci fi cations herein are subject to
change without prior notice.
Model Z max (ohm)
C7UR 0.273
Maximum permissible system impedance Z
max
are listed in
the above table. Determine in consultation with the supply
authority, if necessary, that the power tool is connected only
to a supply of Z
max
or less.
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