Makita DUP180 Instruction Manual page 16

Shear blade maintenance
NOTICE:
Failure to perform blade maintenance
may cause excessive blade friction and shorten
the operating time per battery charge.
Before the operation or once per hour during operation,
apply low-viscosity oil (machine oil, or spray-type lubri-
cating oil) to the shear blades.
► Fig.24
► Fig.25
Apply oil through the lubrication hole by pressing the
hole with the tip of the oil bottle.
► Fig.26: 1. Lubrication hole
After the operation, remove dust from the shear blades
with a wire brush. Wipe the shear blades off with a cloth.
Then apply low-viscosity oil (machine oil, or spray-type
lubricating oil) to the shear blades.
► Fig.27
Adjusting shear blades tension
NOTICE:
Adjust the tension on your shear
blades properly. Too loose tension may result
in dull cut, and too tight tension may result in
overload for the motor and short running time of
the tool.
Adjust the tension on shear blades as follows:
1. Loosen the bolt with the hex wrench, and then
remove it.
► Fig.28: 1. Bolt
NOTICE:
Do not loosen the nut before loosening
the bolt. Otherwise, the nut may be damaged.
2. Loosen the nut with the box wrench, and then
tighten it manually.
► Fig.29: 1. Nut
NOTICE:
The recommended tightening torque is
approximately 0.5 N•m.
3.
Attach the bolt to the tool and tighten it with the
hex wrench.
► Fig.30: 1. Bolt
4. Check that there is no gap between the upper
shear blade and lower shear blade.
► Fig.31
Check that the upper shear blade moves approximately
3 mm toward the lower shear blade.
► Fig.32: 1. Upper shear blade
Grinding the shear blades
NOTE: When grinding the shear blades, adding water
to the grinding stone will make the grinding smoother.
After the grinding, be sure to wipe off the shear
blades with a dry cloth.
Turn off the tool and remove the battery cartridge, and
remove the shear blades from the tool.
Upper shear blade
1.
Grind the upper shear blade with the grinding
stone as shown in the figure.
► Fig.33: 1. Upper shear blade 2. Grinding stone
2. Remove the burrs from the back side of the shear
blade by lightly applying the grinding stone to the shear
blade.
► Fig.34: 1. Grinding stone
Lower shear blade
1. Grind the lower shear blade with the grinding
stone in the direction of the arrow as shown in the
figure.
► Fig.35: 1. Grinding stone 2. Lower shear blade
2.
Remove the burrs from the back side of the shear
blade by lightly applying the grinding stone to the shear
blade.
► Fig.36: 1. Grinding stone
NOTICE:
When sharpening the back side of
shear blade, lightly apply the grinding stone,
and do not sharpen the shear blade too much.
Otherwise, the clearance between the upper blade
and lower blade edges may become too much, or the
life of shear blade may be shortened.
• After installing the shear blades, adjust the tension
on shear blades by referring to the section for
adjusting shear blades tension.
• After installing the shear blades, apply oil to the
shear blades by referring to the section for shear
blade maintenance.
• After installing the shear blades, adjust the cutting
depth by referring to the section for cutting depth
adjustment.
16 ENGLISH