Hitachi C 9U3 Handling Instructions Manual page 28

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5.
Adjusting the base and saw blade to maintain perpendicularity
The angle between the base and the saw blade has been adjusted to 90°, however should
this perpendicularity be lost for some reason, adjust in
the following manner:
(1)
Turn the base face up (Fig. 17) and loosen the wing-nut
and wing-bolt (Fig. 6, 7 on page 24).
(2)
Apply a square to the base and the saw blade and
turning the slotted set screw with a slotted-head
screwdriver, shift the position of the base to produce
the desired right angle.
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. 18).
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. 18).
Doing so is eff 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.
WARNING
To prevent dust inhalation or eye irritation, wear protective safety goggles and a
dust mask when using an air gun or other tool to clean the lower guard, ventilation
holes or other parts of the product.
CAUTION
In the operation and maintenance of power tools, the safety regulations and
standards prescribed in each country must be observed.
Square
Ensure smooth
movement of lower guard
Space between lower
guard and gear cover
Housing vent
28
Base
Slotted set
screw
Fig. 17
Rotation part of
the lower guard
Air gun
Fig. 18

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