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18
5. Inspecting the carbon brushes (Fig. 18)
The motor employs carbon brushes which are
consumable parts. Since and excessively worn carbon
brush can result in motor trouble, replace the carbon
brush with new ones when it becomes worn to or
near the “wear limit”. In addition, always keep carbon
brushes clean and ensure that they slide freely whthin
the brush holders.
NOTE:
When replacing the carbon brush with a new one, be
sure to use the Hitachi Carbon Brush Code No. 999054.
6. Replacing carbon brushes
Take out the carbon brush by first removing the
brush cap and then hooking the protrusion of the
carbon brush with a slotted head screw driver, etc.,
as shown in Fig. 20.
When installing the carbon brush, choose the direction
so that the nail of the carbon brush agrees with the
contact portion outside the brush tube. Then push it
in with a finger as illustrated in Fig. 21. Lastly, install
the brush cap.
CAUTION:
Be absolutely sure to insert the nail of the carbon
brush into the contact portion outside the brush tube.
(You can insert whichever one of the two nails
provided.)
Caution must be exercised since any error in this
operation can result in the deformed nail of the carbon
brush and may cause motor trouble at an early stage.
7 Cleaning of the outside
When the impact driver is stained, wipe with a soft
dry cloth or a cloth moistened with soapy water. Do
not use chloric solvents, gasoline or paint thinner, as
they melt plastics.
8. Storage
Store the impact driver in a place in which the
temperature is less than 40°C, and out of reach of
children.
9. 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.
NOTE:
Due to HITACHI’s continuing program of reserch and
development, the specifications herein are subject to
change without prior notice.
IMPORTANT:
Correct connection of the plug
The wires of the mains lead are coloured in accordance
with the following code:
Blue: –Neutral
Brown: –Live
As the colours of the wires in the mains 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 United Kingdom.
Information concerning airborne noise and vibration
The measured values were determined according to
EN50144.
The typical A-weighted sound pressure level:
95 dB (A)(WH12DM2, WH12DMR)
95 dB (A)(WH9DM2)
96 dB (A)(WR12DM2)
96 dB (A)(WR9DM2)
The typical A-weighted sound power level:
108 dB (A)(WH12DM2, WH12DMR)
108 dB (A)(WH9DM2)
109 dB (A)(WR12DM2)
109 dB (A)(WR9DM2)
Wear ear protection.
The typical weighted root mean square acceleration
value: 10.8 m/s
2
(WH12DM2, WH12DMR)
9.7 m/s
2
(WH9DM2)
12.1 m/s
2
(WR12DM2)
10.9 m/s
2
(WR9DM2)