Hitachi DH 50MRY Bedienungsanleitung Seite 12

English
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. 22)
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 figure.
In addition, always keep carbon brushes clean and
ensure that they slide freely within the brush holders.
5. Replacing carbon brushes
Loosen the two set screws and remove the tail
cover. Remove the brush caps and carbon brushes.
After replacing the carbon brushes, tighten the brush
caps securely and install the tail cover with securely
tightening two set screws.
6. Service parts list
A: Item No.
B: Code No.
C: No. Used
D: Remarks
CAUTION
Repair, modification 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 modified 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 specific 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.
NOTE:
Due HITACHI's continuing program of research and
development, the specifications herein are subject to
change without prior notice.
11
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: 107 dB (A).
Measured A-weighted sound pressure level: 96 dB (A).
Uncertainty KpA: 3 dB (A).
Wear hearing protection.
Vibration total values (triax vector sum) determined
according to EN60745.
Hammer drilling into concrete:
Vibration emission value
Uncertainty K = 1.8 m/s
Vibration emission value
Uncertainty K = 3.0 m/s
Equivalent chiselling value:
Vibration emission value
Uncertainty K = 1.6 m/s
Vibration emission value
Uncertainty K = 3.2 m/s
WARNING
The vibration emission value during actual use of
the power tool can differ from the declared value
depending on the ways in which the tool is used.
To identify the 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 off and when it is running
idle in addition to the trigger time).
a
h, HD =
2
12.0 m/s (DH50MRY)
2
a
h, HD =
2
16.4 m/s (DH50MR)
2
a
h, CHeq =
2
10.2 m/s (DH50MRY)
2
a
h, CHeq =
2
11.3 m/s (DH50MR)
2