Maintenance And Inspection - Hitachi P 20SF Handling Instructions Manual

English
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. 28.
(2) Mount the dust adapter and secure with the screw
D4 × 16. (Fig. 29)
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 efficiency and may cause
overloading 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. Failure
to do so could result in serious hazard.
4. Inspecting the carbon brushes (Fig. 30)
The motor employs carbon brushes which are
consumable parts. Since an excessively worn carbon
brush can result in motor trouble, replace the carbon
brushes with new ones 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 carbon brushes
After removing the chip cover, use a slotted
screwdriver to disassemble the brush caps. The
carbon brushes can then be easily removed with
the spring.
27
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.
7. Replacing supply cord
If the replacement of the supply cord is necessary,
it has to be done by Hitachi Authorized Service
Center to avoid a safety hazard.
8. Service parts list
CAUTION
Repair, modification and inspection of Hitachi Power
Tools must be carried out by a Hitachi Authorized
Service Center.
This Parts List will be helpful if presented with the
tool to the Hitachi Authorized Service Center when
requesting repair or other maintenance.
In the operation and maintenance of power tools, the
safety regulations and standards prescribed in each
country must be observed.
MODIFICATION
Hitachi Power Tools are constantly being improved
and modified to incorporate the latest technological
advancements.
Accordingly, some parts may be changed without
prior notice.
NOTE
Due to HITACHI's continuing program of research and
development, the specifications herein are subject to
change without prior notice.
Information concerning airborne noise and vibration
The measured values were determined according to
EN60745 and declared in accordance with ISO 4871.
Measured A-weighted sound power level: 94 dB (A).
Measured A-weighted sound pressure level: 83 dB (A).
Uncertainty KpA: 3 dB (A).
Wear hearing protection.
Vibration total values (triax vector sum) determined ac-
cording to EN60745.
Planing softwood:
Vibration emission value
Uncertainty K = 1.5 m/s 2
The declared vibration total value has been measured in
accordance with a standard test method and may be
used for comparing one tool with another.
It may also be used in a preliminary assessment of
exposure.
WARNING
The vibration emission during actual use of the power
tool can differ from the declared total value depending
on the ways in which the tool is used.
Identify safety measures to protect the operator that
are based on an estimation of exposure in the actual
conditions of use (taking account of all parts of the
operating cycle such as the times when the tool is
switched off and when it is running idle in addition to
the trigger time).
a
= 3.1 m/s 2
h