Maintenance - Hitachi C 12YB Handling Instructions Manual

NOTE: The movable shield 11 (Fig. 4) will return
to the correct position automatically when the
machine head is lowered, without having to
reposition the pawl.
WARNING:
• Never install blades which appear to be cracked.
Only install blades which comply with standard
EN 847-1.
• Using high speed blades in stainless steel is
strictly forbidden
• A l w a y s u s e s h a r p b l a d e s o f s u i t a b l e
dimensions
4.4 CUTTING CAPACITY
The following tables specifi es the cutting capacity at 0° and
45° which may be achieved under the normal conditions of
use illustrated in this manual.
4.5 SUPPLEMENTARY SUPPORT BASE
Your cutting-off machine is fi tted with a supplementary
support base to increase the supporting surface of the
workpiece in the base. All types of cuts may be carried out
with it, with the vertical head (e.g.: 0°, 45° RH-LH etc.).
To carry out work with head tilting, proceed as follows:
loosen the knob, raise the supplementary support plate until
the lowest internal guide pin has been lifted out of the hole,
rotate it through 180°, fi x it in place in the hole located on
the opposite side and retighten the knob. Once cutting with
head tilting has been completed, it is advisable to reposition
the supplementary support table back in its original position,
not forgetting to tighten the knob.
5 ACCESSORIES
5.1 SELECTION OF THE BLADE
The mitre-saw is fi tted with a WIDIA blade (305 diameter
x 30 hole x 2,5 thickness mm. ),
The following blades are available:
Blade D.305 mm. 48 Teeth
Blade D.305 mm. 72 Teeth
Blade D.305 mm. 96 Teeth
Blade D.305mm. 96 Teeth
for aluminium
To cut domestic and exotic,
hard and soft
To cut chipboards and
laminates to a maximum
30 mm
To cut frames
To c u t a l u m i n i u m a n d
plastics
5.2 VICE (Fig. 13) (OPTIONAL)
CAUTION: When cutting bars or pieces of
aluminium or plastic, use of the vice is advisable
to hold the piece firmly against the angular
bearings, thus avoiding movement during cutting
and, therefore, jams which could damage both the
workpiece and the blade.
Always check that the vice makes perfect contact with the
piece to be cut and that it effectively holds it in position at
the base.
5.3 SUCTION OF DUST RESIDUES (Fig.14)
(OPTIONAL)
The mitre-saw can be connected to an aspirator or a dust
collection bag can be mounted by means of the exhaust
manifold 13.
The aspirator pipe or the bag sleeve must be secured to
the manifold by means of a band. Users are reminded to
empty the bag or aspirator container and to clean the fi lter
regularly.
The air output speed must be equivalent to at least 100
Nm 3 /h.
For example, "dustbin" type aspirators are suitable.
6

MAINTENANCE

6.1 REGULAR MAINTENANCE
The regular maintenance decribed above and in the paragraph
below can be carried out by unskilled personnel.
1. Do not oil the mitre-saw, cause cutting must be carried out
in dry conditions (including the cutting of aluminium and
aluminium alloys); all rotating parts are self-lubricating.
2. During maintenance, wear protective gear if possible
(accident-prevention goggles and gloves).
3. Remove cuttings when necessary both from the cutting
area, work surfaces and support bases.
Use of an aspirator or brush is recommended.
WARNING: Do not use compressed air jets!
4. Regularly check blade conditions: if diffi culties should arise
during cutting, have it sharpened by skilled personnel or
replace it if necessary.
5. Periodically, check that the blade comes to a complete
standstill within 10 seconds of releasing the button, and
that the arm's spring allows the arm to return back up
to its mechanical stop within 2 seconds; in the event of
either of these test returning a negative outcome, get
your machine serviced by an authorized technician.
6. If you feel that swing back was slow, please put oil into
the hinge.
7. Inspecting the carbon brush
For your continued safety and electrical shock
protection, carbon brush inspection and replacemen. On
this machine should ONLY be performed by HITACHI
AUTHORIZED SERVICE CENTER
5