Replacing Blades - Makita 2012NB Manual De Instrucciones

ASSEMBLY
CAUTION:
• Always be sure that the tool is switched off and
unplugged before carrying out any work on the tool.

Replacing blades

CAUTION:
• Handle the blades very carefully when removing or
installing the blades to prevent cuts or injury from the
blades and to prevent damage to the blades. They are
razor-sharp.
• Clean out all chips, dust, pitch or foreign matter adher-
ing to the drum or blades before installing the blades.
• Use blades of the same dimensions and weight, or
drum oscillation/vibration will result, causing poor cut-
ting action and eventually, tool breakdown.
• Replace both blades at the same time.
• The disposable-type blade has a cutting edge on both sides. When one cutting edge becomes dull, you can
use the other cutting edge. Always remove resin and
dirt sticking to the reverse side of the blade before
using the other cutting edge. This blade must not be re-
sharpened. When both cutting edges become dull, the
blade should be carefully thrown away.
1. Removing blades
Loosen the thumb screw which secures the chip
cover and remove the chip cover. Remove the
screws which secure the right side cover. Then
remove the right side cover. Turn the pulley until the
drum can be locked in the position whereby the
blade installation bolts face upward. (Fig. 8)
For throw away blades only
Place the two magnetic holders on the set plate and
push them in the direction of the arrow until the claw
contact the blade. Remove the six blade installation
bolts using the socket wrench. Grip the magnetic
holders and raise them straight up to remove the set
plate and the blade from the drum. Press the lock
plate and turn the pulley 180° to lock the drum.
Remove the other blade as described above. (Fig. 9
& 10)
For standard blades only
Remove the six installation bolts using the socket
wrench. Raise the set plate and blade straight up to
remove them from the drum. Press the lock plate
and rotate the drum by turning the pulley 180° to
lock the drum. Remove the other blade as described
above. Remove the set plate from the blade. (Fig. 11
& 12)
8
2. Installing blades
CAUTION:
• Use only Makita socket wrench provided to tighten
the blade installation bolts. The use of any other
socket wrench may cause overtightening or insuffi-
cient tightening of the bolts, resulting in severe
injury.
For throw away blades only
Provide a flat wood block approximately 300 mm
long and 100 mm wide. Place the blade and the set
plate on the wood block so that the blade locating
lug of the set plate rests in the groove of the blade.
Adjust the set plate so that both ends of the blade
protrude approximately 1 mm beyond the end of the
set plate. Place the two magnetic holders on the set
plate and push them until the claw contacts the
blade. (Fig. 13)
Grip the magnetic holder and slip the heel of the set
plate into the groove in the drum. Install the blade
installation bolts. (Fig. 9)
After tightening all the blade installation bolts lightly
and evenly from the center to the outside, tighten
them completely following the same sequence.
Remove the magnetic holders from the set plate.
Install the other blade as described above. Rotate
the drum slowly while pressing the lock plate to
make sure there is nothing abnormal. Then install
the chip cover and the side cover. (Fig. 10)
CAUTION:
• Do not tighten the blade installation bolts without
the blade locating lug of the set plate correctly
resting in the groove of the blade. This may cause
damage to the blade and potential injury to the
operator.
• Do not turn the tool on with the chip cover
removed.
• When installing the chip cover, make sure that the
chain is not caught by the chip cover.
For standard blades only
Place the blade on the blade gauge so that the blade
edge is perfectly flush with the inside of the front rib
(A). Place the set plate on the blade, then gently
press the heel of the set plate flush with the back
side of the blade gauge (B). Tighten the screws to
secure the set plate to the blade. (Fig. 14)
Slip the heel of the set plate into the groove in the
drum. Install the blade installation bolts. (Fig. 15)
After tightening all the blade installation bolts lightly
and evenly from the center to the outside, tighten
them completely following the same sequence.
(Fig. 16)
Install the other blade as described as above. Rotate
the drum slowly while pressing the lock plate to
make sure there is nothing abnormal. Then install
the chip cover and the side cover.
CAUTION:
• Tighten the blade installation bolts securely when
installing the blades.
• Do not turn the tool on with the chip cover open.
• When installing the chip cover, make sure that the
chain is not caught by the chip cover.