Makita 4603D Manual De Instrucciones página 8

MAINTENANCE
CAUTION:
Always be sure that the tool is switched off and the bat-
tery is disconnected from the tool before carrying out any
work on the tool.
Blade maintenance (Fig. 11 & 12)
After operation, clean off the blades with a stiff brush.
Then wipe the blades with a cloth and coat them with
machine oil.
WARNING:
When wiping or brushing around the blade area, be
extremely careful of all sharp edges. Beware that the
upper shear blade could cut through the wiping cloth and
severely cut you too.
CAUTION:
Failure to perform blade maintenance may cause exces-
sive blade friction and shorten the operating time per bat-
tery charge. It may also damage the tool or battery.
Sharpening blades
When the blades get dull, sharpen them as follows.
NOTE:
The following operation will proceed much more quickly
and accurately if you do not allow the blade edges to
become too dull between sharpenings. It will also
increase the productivity of cutting operations.
(Upper shear blade)
Apply the flat surface of the diamond file to the blade
edge. Push the diamond file in the direction of the arrow
to sharpen along the entire blade edge. Maintain the
same flat contact with the file consistently along the
entire blade edge. (Fig. 13)
Apply the flat surface of the diamond file lightly to the
reverse side of the blade. Move the diamond file in the
direction of the arrow to remove burrs. (Fig. 14)
(Lower shear blade)
Apply the round surface of the diamond file to the blade
edge. Push the diamond file in the direction of the arrow
to sharpen along the entire blade edge. (Fig. 15)
Apply the round surface of the diamond file lightly to the
opposite side of the blade. Move the diamond file in the
direction of the arrow to remove burrs. (Fig. 16)
Removing shear blades
First move the upper shear blade to the highest (wide
open) position. Use the hex wrench to remove the screw which secures
the upper shear blade and the block. (Fig. 17)
Use the socket wrench to remove the hex lock nut which
secures the shear blades. Then remove the screw pin,
cup washer, torsion spring. (Fig. 18)
Pull the block in the direction of the arrow and remove the
upper shear blade. (Fig. 19)
CAUTION:
Be careful not to allow dust, dirt, etc. to enter the tool.
Use the hex wrench to remove the three screws which
secure the lower shear blade. Pull the lower shear blade
straight out to remove it. (Fig. 20)
CAUTION:
Do not remove the block from the tool.
8
Installing shear blades
Install the lower shear blade on the tool. Secure it with
the three screws. (Fig. 21)
Install the upper shear blade so that the protrusion on the
block is inserted into the larger hole in the blade. Secure
the upper shear blade to the block using the screw.
(Fig. 22)
Next install the screw pin, washer, torsion spring, cup
washer and hex lock nut as shown in Fig. 24. When
installing them, set the upper shear blade to the highest
(wide open) position, insert the end (A) of the torsion
spring into the hole in the lower shear blade and hook the
end (B) of the torsion spring to the block through the
opening in the tool. (Fig. 23 & 24)
Tighten the hex lock nut securely so that the upper shear
blade will not move. Then loosen the hex lock nut gradu-
ally until the upper shear blade returns automatically to
the highest (wide open) position from any position. When
this is accomplished, leave the hex lock nut in that same
position for proper shear operation.
CAUTION:
Do not loosen the hex lock nut excessively.
Replacement of carbon brushes
(Fig. 25 & 26)
Replace carbon brushes when they are worn down to the
limit mark. Both identical carbon brushes should be
replaced at the same time.
To maintain product safety and reliability, repairs, mainte-
nance or adjustment should be carried out by a Makita
Authorized Service Center.