Maintenance - Makita DUH551 Instruction Manual

Installing or removing chip receiver
(optional accessory)
CAUTION:
• Always be sure that the tool is switched off and the
battery cartridge is removed before installing or
removing chip receiver.
NOTE:
• When replacing the chip receiver, always wear gloves
so that hands and face does not directly contact the
blade. Failure to do so may cause personal injury.
• Always be sure to remove the blade cover before
installing the chip receiver.
• The chip receiver receives cut-off leaves and alleviates
collecting thrown-away leaves. This can be installed on
either side of the tool. (Fig. 14)
Press the chip receiver on the shear blades so that its slits
overlap with the nuts on the shear blades. At this time,
make sure that the chip receiver does not contact branch
catcher at the top of the shear blades. (Fig. 15)
At this time, the chip receiver needs to be installed so that
its hooks fit into grooves in the shear blade unit. (Fig. 16)
To remove the chip receiver, press its lever on both sides
so that the hooks are unlocked. (Fig. 17)
CAUTION:
• The blade cover 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.
• Never use gasoline, benzine, thinner, alcohol or the
like. Discoloration, deformation or cracks may result.
Cleaning the tool
Clean out the tool by wiping off dust with a dry or soap-
dipped rag.
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 it off 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.
NOTICE:
If the parts other than the shear blades such as the
crank are worn out, ask Makita Authorized Service
Centers for parts replacement or repairs.
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.
Removing the shear blades
Reverse the tool and loosen four screws. (Fig. 18)
NOTE:
• Be careful not to get your hands dirty as grease is
applied in the shear blade driving area.
Remove the under cover. (Fig. 19)
Remove the plate. (Fig. 20)
Set the crank at the angle as shown in the figure with a
slotted screwdriver. (Fig. 21)
Remove two screws from the shear blades and the shear
blade unit will be taken out. (Fig. 22)
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 blades
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. 23)
Overlap the oval hole in the upper blade with that in the
lower one. (Fig. 24)
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. 25)
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. 26)
Check the crank for smooth turn with a slotted
screwdriver. (Fig. 27)
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.
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