Hitachi P 20SA2 Handling Instructions Manual page 25

3. 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.
4. Inspecting the carbon brushes: (Fig. 26)
The motor employs carbon brushes which are
consumable parts. Since an excessively worn carbon
brush can result in motor trouble, replace the carbon
brushes with new ones 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.
5. Replacing carbon brushes:
After removing the chip cover, use a slotted
screwdriver to disassemble the brush caps. The
carbon brushes can then be easily removed with
the spring.
6. 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.
Information concerning airborne noise and vibration
The measured values were determined according to
EN 60745 and declared in accordance with ISO 4871.
Measured A-weighted sound power level: 100 dB (A)
Measured A-weighted sound pressure level: 89 dB (A)
Uncertainty KpA: 3 dB (A)
Wear ear protection.
The typical weighted root mean square acceleration value
does not exceed 2.5 m/s
2
.
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