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English
SPECIFICATIONS
The speci cations of this machine are listed in the Table on
page 157.
NOTE
Due to HITACHI’s continuing program of research and
development, the speci cations herein are subject to
change without prior notice.
MOUNTING AND OPERATION
Action Figure Page
Adjusting the cutting depth 4
158
Adjusting the angle of inclination 5
158
Adjusting the riving knife (C6U3,
C6BU3, C6UM, C6BUM)
6
158
Adjusting the riving knife (C7U3,
C7BU3, C7UM, C7BUM)
7
159
Do not use the tool with only the
blower function. (C6U3, C6BU3,
C7U3 and C7BU3 only)
8
159
Adjusting the guide piece (C6U3,
C6BU3, C7U3 and C7BU3 only)
9
159
Cutting line 10
159
Regulating the guide 11
159
Using the cord holder 12
159
Mounting the dust collector set 13
159
Switch operation*
1
14
159
Cutting at right angles 15
160
Inclined cutting (+45° direction) 16
160
Dismounting the saw blade 17
160
Mounting the Saw Blade*
2
18
161
Using the guide rail*
3
(C6UM,
C6BUM, C7UM and C7BUM only)
(optional accessories)
19
161
Using the guide rail adapter*
4
(C6U3, C6BU3, C7U3 and C7BU3
only) (optional accessories)
20
162
Adjusting the base and saw blade
to maintain parallelism (C6UM,
C6BUM, C7UM and C7BUM only)
21
162
Adjusting the base and saw blade
to maintain perpendicularity (C6U3,
C6BU3, C7U3 and C7BU3 only)
22
162
Adjusting the base and saw blade
to maintain perpendicularity (C6UM,
C6BUM, C7UM and C7BUM only)
23
162
Selecting accessories
164
*1 Before beginning work, check to ensure that operating
the switch correctly turns the tool ON and OFF.
While the tool is plugged in to the receptacle, ensure that
the sawblade stops when the switch is turned OFF.
In some regions, it is not necessary to perform step
1
.
*2 Usable sawblade diameter:
C6U3, C6BU3, C6UM, C6BUM ....... 165 to 162 mm
C7U3, C7BU3, C7UM, C7BUM ....... 190 to 185 mm
Body thickness: up to 1.5 mm, tip width: at least 1.9 mm
Riving knife thickness: 1.8 mm
*3 Use the guide rail when cutting in long, straight lines.
The rubber lip of the guide rail works to prevent
splintering on the cut surface. When using the guide rail
for the rst time, cut the rubber lip as follows: Set the
tool’s cutting depth to the maximum and the saw blade
angle to perpendicular (0°), pull the switch completely,
and cut at a slow, constant speed.
After the rubber lip is cut, it can also be used for 45°
angle cutting.
*4 Use with C6U3, C6BU3, C7U3 and C7BU3 when using
the guide rail.
NOTE
When performing cutting operation using the guide
rail, remember that the cutting depth decreases as the
thickness of the guide rail increases.
MAINTENANCE AND INSPECTION
1. Inspecting the saw blade
Since use of as dull saw blade will degrade e ciency
and cause possible motor malfunction, sharpen or
replace the saw blade as soon as abrasion is noted.
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. 24)
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
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.
CAUTION
When replacing the new carbon brushes, always
use genuine Hitachi carbon brushes with the number
speci ed in the drawing.
For models C6BU3, C6BUM, C7BU3 and C7BUM, the
brake may not work if other than the speci ed carbon
brushes are used.
When the brake becomes ine ective, replace the carbon
brushes with new ones.
4. Replacing carbon brushes
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. 25).
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. 25).
Doing so is e 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.
0000Book_C6U3.indb 60000Book_C6U3.indb 6 2016/07/15 12:07:482016/07/15 12:07:48
6


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