Maintenance And Inspection - Hitachi Koki DW 15Y Instrucciones De Manejo

English
(5) Cutting oil
It is important to use a cutting oil suitable for the
material to be tapped to achieve good cutting quality
and to prolong the service life of the tap. Suitable
cutting oils are shown in Table 2.
Table 2
Material to be tapped Cutting Oil
Steel
Aluminum
CAUTION
Exercise care to keep the cutting fluid from adhering
to the tapper body.

MAINTENANCE AND INSPECTION

1. Inspecting the drill bit and tap
Since continued use of a worn bit or tap will degrade
operating efficiency and cause possible overloading
of the motor, replace or sharpen the bit or tap
without delay when excessive wear is noticed.
2. 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.
3. Inspecting the carbon brushes (Fig. 6)
The motor employs carbon brushes which are
consumable parts. Since excessively worn carbon
brushes can result in motor trouble, replace the
carbon brushes with new ones having the same
carbon brush No. shown in the figure when they
become worn to or near the "wear limit". In addition,
always keep carbon brushes clean and ensure that
they slide freely within the brush holders.
4. Replacing a carbon brush (Fig. 7)
Disassembly
(1) Loosen the three machine screws, and remove
the handle cover.
(2) Pull out the brush holder together with the carbon
brush. Exercise adequate care not to excessively
pull or damage the lead wire.
(3) Remove the carbon brush from the brush holder.
Assembly
(1) Insert the new carbon brush into the brush holder.
(2) Insert the brush holder together with the carbon
brush into the brush holder chamber in the
housing.
(3) Ensure that the lead wire and other parts are
properly positioned, and that there is no
possibility of the lead wire coming in contact
with the armature or other moving parts.
(4) Reinstall the handle cover while ensuring that
the internal wiring does not become pinched
between the cover and the housing, and secure
the handle cover with the three machine screws.
CAUTIONS
Be sure to follow the above assembly procedures
exactly. Should the internal wiring contact the
armature or become pinched between the handle
cover and housing, a serious risk of electric shock to
the operator would be created.
7
Vegetable Oil,
Water-insoluble Cutting Oil
Light Oil
Do not tamper with parts other than those necessary
to effect carbon brush replacement.
5. 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.
6. Service parts list
A: Item No.
B: Code No.
C: No. Used
D: Remarks
CAUTION
Repair, modification and inspection of Hitachi Power
Tools must be carried out by an 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 (i.e. code numbers and/or
design) 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.
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: 85 dB (A).
Wear ear protection.
The typical weighted root mean square acceleration
value does not exceed 2.5 m/s 2 .