Sharpening The Blades; Maintenance And Inspection; Important - Hitachi P 20SD Mode D'emploi

English
3. Adjustment of blade height:
(1) Loosen the 2 screws holding on the blade and the
set plate (A).
(2) Press the turned surface of the 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. 14, 15)

SHARPENING THE BLADES

Use of the accessory Blade Sharpening Ass'y is recom-
mended for convenience.
1. Use of Blade Sharpening Ass'y
As shown in Fig. 16, 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 edged simultaneously contact the dressing
stone as shown in Fig. 17.
2. Blade sharpening intervals
Blade sharpening intervals depend on the type of
wood being cut and the cutting depth. However,
sharpening should generally be effected after each
500 meters of cutting operation.
3. Dressing Stone
When a water dressing stone is available, use it
after dipping it sufficiently in water since such a
dressing stone may be worn during grinding works,
flatten the upper surface of the dressing stone as
often as necessary.

MAINTENANCE AND INSPECTION

1. Inspecting the blades:
Continued use of dull or damaged blades will result
in reduced cutting efficiency and may cause over-
loading of the motor. Sharpen or replace the 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. Fail-
ure to do so could result in serious hazard.
4. Inspecting the carbon brushes (Fig. 18)
The motor employs carbon brushes which are con-
sumable 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.
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.
7
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 identify-
ing 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 STAN-
DARD 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: 94 dB (A).
The typical A-weighted sound power level: 107 dB (A).
Wear ear proteciton.
The typical weighted root mean square acceleration
value does not exceed 2.5 m/s 2 .