Prior To Operation - Hitachi CR 18DV Handling Instructions Manual

Regarding electric discharge in case of new
batteries, etc.
As the internal chemical substance of new batteries
and batteries that have not been used for an extended
period is not activated, the electric discharge might
be short when using them the first and second time.
This is a temporary phenomenon, and normal time
required for recharging will be restored by recharging
the batteries 2 – 3 times.
How to make the batteries perform longer.
(1) Recharge the batteries before they become completely
exhausted.
When you feel that the power of the tool becomes
weaker, stop using the tool and recharge its battery.
If you continue to use the tool and exhaust the electric
current, the battery may be damaged and its life will
become shorter.
(2) Avoid recharging at high temperatures.
A rechargeable battery will be hot immediately after
use. If such a battery is recharged immediately after
use, its internal chemical substance will deteriorate,
and the battery life will be shortened. Leave the battery
and recharge it after it has been cooled for a while.
CAUTION
If the battery is charged while it is heated because it
has been left for a long time in a location subject to
direct sunlight or because the batetery has just been
used, the pilot lamp of the charger lights up green. In
such a case, first let the battery cool, then start
charging.
When the pilot lamp flickers in red quickly (at 0.2-
second intervals), check for and take out any foreign
objects in the charger's battery installation hole. If
there are no foreign objects, it is probable that the
battery or charger is malfunctioning. Take it to your
authorized Service Center.
Since the built-in micro computer takes about 3
seconds to confirm that the battery being charged
with UC24YFA is taken out, wait for a minimum of 3
seconds before reinserting it to continue charging. If
the battery is reinserted within 3 seconds, the battery
may not be properly charged.

PRIOR TO OPERATION

1. Mounting the blade
This unit employs a detachable mechanism that
enables mounting and removal of saw blades without
the use of a wrench or other tools.
(1) Turn on and off the switching trigger several times so
that the holder sleeve can jump out of the front cover
completely. Thereafter, turn off the switch and remove
the battery. (Fig. 4)
CAUTION
Be absolutely sure to keep the switch turned off and
the the battery removed to prevent any accident.
(2) Turn the holder sleeve in the direction of the arrow
mark shown in Fig. 5 marked on the holder sleeve. If
you turn the holder sleeve halfway you will be able to
secure it automatically. (Fig. 5)
(3) Insert the saw blade all the way into the small slit of
the plunger tip. You can mount this blade either in
the upward or downward direction. (Fig. 6,
Fig. 7)
(4) Pull the holder sleeve back slightly in the direction of
the arrow mark shown in Fig. 8 (in the direction
opposite to the arrow marked on the holder sleeve).
When you do this, the spring force will return the
holder sleeve to the correct position automatically.
There is no need to fasten the holder sleeve at this
time. (Fig. 8)
(5) Pull the back of the saw blade two or three times by
hand and check that the blade is securely mounted.
When pulling the blade, you will know it is properly
mounted if it clicks and the holder sleeve moves
slightly. (Fig. 9)
CAUTION
When pulling the saw blade, be absolutely sure to
pull it from the back. Pulling other parts of the blade
will result in an injury.
2. Dismounting the blade
(1) Turn on and off the switching trigger several times so
that the holder sleeve can jump out of the front cover
completely. Thereafter, turn off the switch and remove
the battery. (Fig. 4)
CAUTION
Be absolutely sure to keep the switch turned off and
the battery removed to prevent any accident.
(2) After you have turned the holder sleeve in the
direction of the
Fig. 5 and secured it, turn the blade so it faces
downward. The blade should fall out by itself. If the
blade doesn't fall out, pull it out by hand.
CAUTION
Never touch the saw blade immediately after use.
The metal is hot and can easily burn your skin.
WHEN THE BLADE IS BROKEN
Even when the saw blade is broken and remains
inside the small slit of the plunger, it should fall out if
you turn the holder sleeve in the direction of the
arrow mark, secure the holder sleeve, and face the
blade downward. If it doesn't fall out itself, take it out
using the procedures explained below.
(1) If a part of the broken saw blade is sticking out of the
small slit of the plunger, pull out the protruding part
and take the blade out.
(2) If the broken saw blade is hidden inside the small slit,
hook the broken blade using a tip of another saw
blade and take it out. (Fig. 10)
MAINTENANCE AND INSPECTION OF SAW BLADE
MOUNT
(1) After use, blow away sawdust, earth, sand, moisture,
etc., with air or brush them away with a brush, etc., to
ensure that the blade mount can function smoothly.
(2) Periodically lubricate the saw blade mount with
machine oil through the small slit at a state where the
holder sleeve is turned in the direction of the arrow
mark shown in Fig. 5. (Fig. 11)
NOTE:
If the saw blade mount is used without proper cleaning
and lubrication, the rotation of the holder sleeve may
be hampered by sawdust and particles of dust,
disabling you to remove the saw blade with your
fingers.
In such a case, hold the periphery of the holder
sleeve lightly using a pair of pliers and the like, and
turn the holder sleeve to left and right little by little.
arrow mark shown in
16