6
English
WHEEL SELECTING METHOD
Types of wheels are varied according to the materials to be ground. Select a wheel appropriate for the material to be ground.
The following table is an outline of wheels and materials to be ground.
Materials to be ground
Grain
Grading
Bonding degree
Structure
Bonding agent
Mild steel, hard steel, forged
steel
WA
60
−
80
P
m
V
Cast iron
C
36
M
−
O
m
V
Brass, bronze, aluminium
C
36
J
−
K
m
V
Ceramic
WA
60
−
80
M
m
V
Synthetic resin
C
36
K
−
M
m
V
Small-scaled wheels with shaft are prepared for grinding small surfaces. Their dimensions and shapes are shown in
“Selecting accessories”.
Since wheel shaft diameter is 3 mm, use the collet chuck for 3 mm shaft sold separately by your HITACHI dealer as an
optional accessory.
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.
MAINTENANCE AND INSPECTION
1. Inspecting the wheel
Ensure that the 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. 6)
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
fi
gure when it becomes worn to or
near the “wear limit”
ⓑ
. In addition, always keep carbon
brushes clean and ensue that they slide freely within the
brush holders.
4. Replacing carbon brushes
<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 from 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.
NOTE
Make sure the end of the spring is not holding the pig-tail.
(4) Mount the tail cover and tighten the D4 tapping screw.
5. Replacing supply cord
If the replacement of the supply cord is necessary, it has
to be done by Hitachi Authorized Service Center to avoid
a safety hazard.
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.
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2014/10/20 17:13:26
