Maintenance; Sharpening Blades - Makita AR-3733 Instruction Manual

After use
Close the shear blades, press the I/O switch to the "O"
(off) position, and disconnect the connection cord from
the shears and the switch box, and remove the batteries
from battery holder.
Store the shears in dry, high or locked-up place – out of
reach of children.
NOTICE:
Remove the battery when not using the
shears. Otherwise the battery capacity is reduced
during course of time.
Catcher
Optional accessory
The catcher is useful, when picking flowers. It temporar-
ily holds picked flower after cutting.
If the clearance between the catcher and lower blade
is not appropriate for your application, adjust the clear-
ance by loosening the screws.
► Fig.22: 1. Catcher 2. Screw

MAINTENANCE

CAUTION:
Always be sure that the tool is
switched off and the battery cartridge is removed
before attempting to perform inspection or
maintenance.
CAUTION:
Wear safety gloves when handling
the blade. Otherwise it may result in personal injury.
NOTICE:
Never use gasoline, benzine, thinner,
alcohol or the like. Discoloration, deformation or
cracks may result.
Blade maintenance
NOTICE:
Failure to perform blade maintenance may
cause excessive blade friction and shorten the oper-
ating time per battery charge.
Before and after operation, check the shear blades
carefully.
After operation, clean off the blades with a stiff brush.
Then wipe the blades with a cloth. And apply Dolmar
genuine machine oil onto the blade edge and movable
part.
► Fig.23

Sharpening blades

Upper shear blade
1.
Apply the flat surface of the diamond file to the
blade edge.
Push the diamond file towards the tip of the blade to
sharpen along the entire blade edge.
Maintain the same flat contact with the file consistently
along the entire blade edge.
► Fig.24: 1. Diamond file
2. Apply the flat surface of the diamond file lightly to
the opposite side of the blade.
Move the diamond file towards the tip of the blade
lightly to remove burrs.
► Fig.25
NOTICE:
Do not sharpen this side too much. File
lightly only for removing burrs. Otherwise the blade
clearance may become too much or the blade life
may be shortened.
Lower shear blade
1. Apply the round surface of the diamond file to the
blade edge.
Push the diamond file towards the tip of the blade to
sharpen along the entire blade edge.
► Fig.26
2.
Apply the flat surface of the diamond file lightly to
the opposite side of the blade.
Move the diamond file towards the tip of the blade
lightly to remove burrs.
► Fig.27
NOTICE:
Do not sharpen this side too much. File
lightly only for removing burrs. Otherwise the blade
clearance may become too much or the blade life
may be shortened.
Adjustment for blade clearance
► Fig.28: 1. Plate fixing bolt 2. Lock plate 3. Blades
tightening nut
From time to time, adjust the clearance of the shear
blades as follows:
1. Switch on the tool, and pull the switch trigger to
open the shear blades.
2. With shear blades open, switch off the tool. And
disconnect the connection cord from the tool.
3. Loosen the plate fixing bolt. And then remove the
lock plate.
4.
Adjust the tightness of the blades tightening nut
by hand (fastening torque for the blade tightening nut:
approximately 0.5 N•m).
5. Install the lock plate and plate fixing bolt again.
6. Check the tightness of the blade whether the
blades never rattle but upper blade can be opened or
closed about 3mm by hand. If the blades are too tight or
loose, adjust the clearance again.
NOTICE:
Pay attention to the clearance of the
blades. Too loose clearance may result in dull cut,
and too tight blade clearance may result in overload
for the motor and short running time of the tool.
Removing or installing shear blades
To remove the shear blades, perform following steps:
1.
Tilt the opening angle selector lever to the left side
first to open the blades fully.
2. Switch on the tool, and pull the switch trigger to
open the shear blades.
14 ENGLISH