Maintenance And Inspection - Hitachi P 20SD Handling Instructions Manual

English
2. Cutter blade assembly:
CAUTION
Prior to assembly, thoroughly wipe off all awarf
accumulated on the cutter blade.
(1) As shown in Fig 10, mount the new cutter blade
by sliding it on the set plate (B) so that the blade
tip projects by 1mm from the end of the cutter
block.
(2) As shown in Fig 11, fix the bolt at the blade holder
and blade replacement is completed.
(3) Turn the cutter block over, and set the other side
in the same manner.
3. Adjustment of cutter blade height:
(1) As shown in Fig 12, use the box wrench to loosen
the three bolts used to ratain the cutter blade, and
remove the blade holder.
(2) As shown in Fig 13, after removing the cutter blade,
slide the set plate (B) in the direction indicated by
the arrow to disassemble set plate (B).
(3) Loosen the 2 screws holding on the cutter blade
and the set plate (A), set plate (B).
(4) As shown in Fig 14, 15, press the turned surface
of the set plate (A) to the wall surface b while
adjusting the cutter blade edge to the wall surface
a of the set gauge. Then, tighten them with the 2
screws.
(5) As shown in Fig 16, 17, insert a turned portion of
the set plate (A) attached to the set plate (B) into
a groove on the flat portion of the cutter block.
(6) As shown in Fig 18, place the blade holder on the
completed assembly and fasten it with the three
bolts. Ensure that the bolts are securely tightened.

MAINTENANCE AND INSPECTION

1. Inspecting the cutter blades:
Continued use of dull or damaged cutter blades will
result in reduced cutting efficiency and may cause
overloading of the motor. Sharpen or replace the
cutter blades as often as necessary.
2. Handling
CAUTION
The front base, rear base, and cutting depth control
knob are precisely machined to obtain specifically
high precision. If these parts are roughly handled
or subjected to heavy mechanical impact, it may
cause deteriorated precision and reduced cutting
performance. These parts must be handled with
particular care.
3. Inspecting the mounting screws:
Regularly inspect all mounting screws and ensure
that they are properly tightened. Should any of the
screws be loose, retighten them immediately. Failure
to do so could result in serious hazard.
4. Inspecting the carbon brushes (Fig. 19)
The motor employs carbon brushes which are
consumable parts. Since an excessively worn carbon
brush can result in motor trouble, replace the carbon
brush with a new one having the same carbon
brush No. shown in the figure when it becomes
worn to or near the "wear limit". In addition, always
keep carbon brushes clean and ensure that they
slide freely within the brush holders.
7
5. Replacing a carbon brush:
After removing the chip cover, use a screwdriver
to disassemble the brush cap. The carbon brush can
then be easily removed with the spring.
6. Maintenance of the motor
The motor unit winding is the very "heart" of the
power tool.
Exercise due care to ensure the winding does not
become damaged and/or wet with oil or water.
NOTE
Due to HITACHI's continuing program of research and
development, the specifications herein are subject to
change without prior notice.
IMPORTANT
Correct connection of the plug
The wires of the main lead are coloured in accordance
with the following code:
Blue: -- Neutral
Brown: -- Live
As the colours of the wires in the main lead of this tool
may not correspond with the coloured markings
identifying the terminals in your plug proceed as follows:
The wire coloured blue must be connected to the terminal
marked with the letter N or coloured black.
The wire coloured brown must be connected to the
terminal marked with the letter L or coloured red.
Neither core must be connected to the earth terminal.
NOTE
This requirement is provided according to BRITISH
STANDARD 2769: 1984.
Therefore, the letter code and colour code may not be
applicable to other markets except The United Kingdom.
Information concerning airborne noise and vibration
The measured values were determined according to
EN50144.
The typical A-weighted sound pressure level: 94dB (A).
The typical A-weighted sound poweer level: 107dB (A).
Wear ear protection.
The typical weighted root mean square acceleration
value does not exceed 2.5m/s 2 .