Maintenance And Inspection - Hitachi P 20ST Bedienungsanleitung

CAUTION
Be careful not to injure your hands.
2. Carbide blade assembly
CAUTION
Prior to assembly, thoroughly wipe off all swarf
accumulated on the carbide blade.
(1) As shown in Fig. 10, lift set plate (B) and insert the new
carbide blade between cutter block and set plate (B).
(2) As shown in Fig. 11, mount the new carbide blade by
sliding it on the set plate (B) so that the blade tip projects
by 1mm from the end of the cutter block.
(3) As shown in Fig. 12, fi x the bolts at the blade holder after
blade replacement has been completed.
(4) Turn the cutter block over, and set the other side in the
same manner.
3. Adjustment of carbide blade height
CAUTION
If the carbide blade's heights are inaccurate after
above procedures have been completed, carry out the
procedures described below.
(1) As shown in Fig. 13, use the box wrench to loosen the
three bolts used to retain the carbide blade, and remove
the blade holder.
(2) As shown in Fig. 14, after removing the carbide blade,
slide set plate (B) in the direction indicated by the arrow
to disassemble set plate (B).
(3) Loosen the 2 screws holding on the carbide blade and
set plate (A), set plate (B).
(4) As shown in Fig. 15, 16, press the turned surface of set
plate (A) to the wall surface b while adjusting the carbide
blade edge to the wall surface a of the set gauge. Then,
tighten them with the 2 screws.
(5) As shown in Fig. 17, 18, insert a turned portion of set
plate (A) attached to set plate (B) into a groove on the fl at
portion of the cutter block.
(6) As shown in Fig. 19, place the blade holder on the
completed assembly and fasten it with the three bolts.
Ensure that the bolts are securely tightened. Follow the
same procedures for the opposite side carbide blade.
BLADE ASSEMBLY AND DISASSEMBLY
AND ADJUSTMENT OF BLADE HEIGHT (FOR
RESHARPENABLE BLADE TYPE)
1. Blade disassembly
(1) As shown in Fig. 13, use the accessory box wrench
to loosen the three bolts used to retain the blade, and
remove the blade holder.
(2) As shown in Fig. 14, slide the blade in the direction
indicated by the arrow to disassemble the blade.
CAUTION
Be careful not to injure your hands.
2. Blade assembly
CAUTION
Prior to assembly, thoroughly wipe off all swarf
accumulated on the blade.
(1) Insert a turned portion of set plate (A) attached to the
blade into a groove on the fl at portion of the cutter block.
(Fig. 17, 20)
Set the blade so that both sides of the blade protrude
from the width of the cutter block by about 1 mm (Fig. 21)
(2) Place the blade holder on the completed assembly,
as shown in Fig. 22, and fasten it with the three bolts.
Ensure that the bolts are securely tightened.
(3) Turn the cutter block over, and set the opposite side in
the same manner.
3. Adjustment of blade height
(1) Loosen the 2 screws holding on the blade and set
plate (A).
(2) Press the turned surface of set plate (A) to the wall
surface b while adjusting the blade edge to the wall
surface a of the set gauge. Then, tighten them with the 2
screws. (Fig. 15, 23)
SHARPENING THE RESHARPENABLE BLADES
Use of the accessory Blade Sharpening Ass'y is
recommended for convenience.
1. Use of Blade Sharpening Ass'y
As shown in Fig. 24, two blades can be mounted on the
blade sharpening ass'y to ensure that the blade tips are
ground at uniform angles. During grinding, adjust the
position of the blades so that their edges simultaneously
contact the dressing stone as shown in Fig. 25.
2. Blade sharpening intervals
Blade sharpening intervals depend on the type of wood
being cut and the cutting depth. However, sharpening
should generally be eff ected after each 500 meters of
cutting operation.
3. Dressing Stone
When a water dressing stone is available, use it after
dipping it suffi ciently in water since such a dressing stone
may be worn during grinding works, fl atten the upper
surface of the dressing stone as often as necessary.
ATTACHING AND DETACHING THE DUST
ADAPTER (OPTIONAL ACCESSORY)
CAUTION
○ To prevent accidents, ensure that the power tool is
switched off and the plug is disconnected from the power
source.
○ Follow the procedure below to mount the dust adapter
securely. Failure to do so may result in the adapter
coming off , causing injury.
1. Attaching the dust adapter
(1) Remove the screw D4 × 16 in the chip cover and remove
the chip cover as shown in Fig. 26.
(2) Mount the dust adapter and secure with the screw D4 ×
16. (Fig. 27)
NOTE
Take care not to break the catch when attaching or
detaching the dust adapter and chip cover.
2. Removing the dust adapter
To remove the dust adapter, follow the procedure above
in reverse order.

MAINTENANCE AND INSPECTION

1. Inspecting the blades
Continued use of dull or damaged blades will result in
reduced cutting effi ciency and may cause overloading
of the motor. Sharpen or replace the blades as often as
necessary.
English
13