Replacing Carbon Brushes - Makita DUH551 Instruction Manual

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: 1. Blade cover 2. Screws
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: 1. Under cover 2. Blade cover 3. Screws
Remove the plate.
► Fig.20: 1. Plate
Set the crank at the angle as shown in the figure with a
slotted screwdriver.
► Fig.21: 1. Crank
Remove two screws from the shear blades and the
shear blade unit will be taken out.
► Fig.22: 1. Screws 2. Shear blade
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: 1. Crank
Overlap the oval hole in the upper blade with that in the
lower one.
► Fig.24: 1. Oval hole of shear blade
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: 1. Oval hole of shear blade 2. Crank
3. Screws
Check the crank for smooth turn with a slotted
screwdriver.
► Fig.27: 1. Crank
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 prop-
erly, there is a poor fit between the blades and
crank. Redo from the beginning.

Replacing carbon brushes

► Fig.28: 1. Limit mark
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.29: 1. Holder cap cover 2. Slotted screwdriver
Insert the top end of slotted screwdriver into the notch in
the tool and remove the holder cap cover by lifting it up.
► Fig.30: 1. Brush holder cap 2. Slotted screwdriver
Use a slotted 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.
Storage
The hook hole in the bottom of the blade cover is con-
venient for hanging the tool from a nail or screw on the
wall.
► Fig.31
Remove the battery cartridge and put the blade cover
on the shear blades so that the blades are not exposed.
Store the tool out of the reach of children carefully.
Store the tool in the place not exposed to water and
rain.
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be per-
formed by Makita Authorized Service Centers, always
using Makita replacement parts.
13 ENGLISH