Cleaning The Tool; Blade Maintenance - Makita BUH650 Instruction Manual

At this time, the chip receiver needs to be installed so that
its hooks fit into grooves in the shear blade unit. (Fig. 18)
To remove the chip receiver, press its lever on both sides
so that the hooks are unlocked. (Fig. 19)
CAUTION:
• The blade cover (standard equipment) cannot be
installed on the tool with the chip receiver being
installed. Before carrying or storing, uninstall the chip
receiver and then install the blade cover to avoid blade
exposure.
NOTE:
• Check the chip receiver for secure installment before
use.
• Never try to uninstall the chip receiver by an excessive
force with its hooks locked in the blade unit grooves.
Using the excessive force may damage it.
MAINTENANCE
CAUTION:
• Always be sure that the tool is switched off and the
battery cartridge is removed before attempting to
perform inspection or maintenance.

Cleaning the tool

Clean out the tool by wiping off dust with a dry or soap-
dipped rag.
CAUTION:
• Never use gasoline, benzine, thinner, alcohol or the
like. Discoloration, deformation or cracks may result.

Blade maintenance

Smear the blade before and once per hour during
operation using machine oil or similars.
NOTE:
• Before smearing the blade, remove the chip receiver.
After operation, remove dust from both sides of the blade
with wired brush, wipe off it with a rag and then apply
enough low-viscosity oil, such as machine oil etc. and
spray-type lubricating oil.
CAUTION:
• Do not wash the blades in water. Failure to do so may
cause rust or damage on the tool.
Removing or installing shear blade
CAUTION:
• Before removing or installing shear blade, always be
sure that the tool is switched off and the battery
cartridge is removed.
• When replacing the shear blade, always wear gloves
without removing blade cover so that hands and face
does not directly contact the blade. Failure to do so
may cause personal injury.
NOTE:
• Do not wipe off grease from the gear and crank. Failure
to do so may cause damage to the tool.
• For specific way of removing and installing shear
blades refer to the reverse of a package for accessory
shear blades.
12
Removing the shear blades
Reverse the tool and loosen four screws. (Fig. 20)
NOTE:
• Be careful not to get your hands dirty as grease is
applied in the shear blade driving area.
Remove the under cover. (Fig. 21)
Remove the plate. (Fig. 22)
Set the crank at the angle as shown in the figure with a
slotted bit screwdriver. (Fig. 23)
Remove two screws from the shear blades and the shear
blade unit will be taken out. (Fig. 24)
CAUTION:
• Return the gear to the original position in such a
manner as it was installed if it should be taken away by
mistake.
Installing the shear blade
Prepare 4 removed screws (For under cover), 2 screws
(For shear blade), plate, under cover, and new shear
blades.
Adjust the crank position as shown in the figure. At this
time, apply some grease provided with new shear blades
to the periphery of the crank. (Fig. 25)
Overlap the oval hole in the upper blade with that in the
lower one. (Fig. 26)
Take out the blade cover from the old shear blades and fit
it onto the new ones for easy handling during the
replacement of blades. (Fig. 27)
Place the new shear blades on the tool so that the oval
holes in the shear blades fit onto the crank. Overlap the
holes in the shear blades with the screw holes in the tool
and then secure them with two screws. (Fig. 28)
Check the crank for smooth turn with a slotted bit
screwdriver. (Fig. 29)
Install the plate, under cover on the tool. Tighten the
screw firmly.
NOTE:
• There is no distinction between the top and bottom of
the plate.
Remove the blade cover and then turn on the tool to
check it for proper movement.
NOTE:
• When the shear blades does not operate properly,
there is a poor fit between the blades and crank. Redo
from the beginning.
Replacing carbon brushes (Fig. 30)
Remove and check the carbon brushes regularly. Replace
when they wear down to the limit mark. Keep the carbon
brushes clean and free to slip in the holders. Both carbon
brushes should be replaced at the same time. Use only
identical carbon brushes. (Fig. 31)
Insert the top end of slotted bit screwdriver into the notch
in the tool and remove the holder cap cover by lifting it up.
(Fig. 32)
Use a screwdriver to remove the brush holder caps. Take
out the worn carbon brushes, insert the new ones and
secure the brush holder caps.
Reinstall the holder cap cover on the tool.