Maintenance And Inspection - Hitachi Koki GP 13 Instrucciones De Manejo

○ After switching off the machine, do not put it down until
the grinding wheel has come to a complete stop. Apart
from avoiding serious accidents, this precaution will
reduce the amount of dust and swarf sucked into the
machine.
○ By all means avoid using grinding wheels with
overstandard dimensions. If grinding wheels which are
too large are used, the peripheral velocity of the grinding
wheel will exceed the safety limits, and breakage may
result.
Material
to be ground
Welded portion
of general steel
materials
Cast iron
Bronze and brass
Aluminum
Marble
Granite
MOUNTING AND DISMOUNTING THE
GRINDING WHEEL
CAUTION
To avoid serious accident, ensure the switch is in the
OFF position, and the power source is disconnected.
○ When attaching or removing the grinding wheel,
proceed as shown in Fig. 2. On the wheel shaft there is
a hole for locking the shaft in position. A rod is inserted
into this hole to keep the shaft from rotating. Then turn
the nut holding the grinding wheel in place.
CAUTION
Do not fasten too tightly the nut holding the grinding
wheel in place. If this nut is excessively tightened, the
grinding wheel may split. The nut's screws are threaded
in the directions in which they will be tightened by
rotation: therefore, there is no possibility of their
loosening during operation.

MAINTENANCE AND INSPECTION

1. Inspecting the wheel
Ensure that the wheel is free of cracks and surface
defects.
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. 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.
Grain Grading
A 36
C 16
C 24
C 30
C 36
C 16
KINDS OF GRINDING WHEELS AND THEIR
APPLICATIONS
○ In grinding operation, the most important matter to
ensure eff ective operation is to select a grinding
wheel which conforms to the material to be ground.
Provided for the Hitachi Electric Grinder are grinding
wheels appropriate for steel material grinding, material
discrimination testing by sparks of steel material,
fi nishing of welded portions, and so on.
○ When using the Grinder on nonferrous metals, cast
iron, stone and so on, select a grinding wheel according
to the following standards. Many grinding wheels
conforming to these materials to be ground are sold
on the market, allowing customers to purchase the
grinding wheel fi tted to the application.
Bonding Binding
(Hardness) material
P V
P B
P V
Q B
M V
K V
4. Inspecting the carbon brushes (Fig. 3)
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 fi gure when it becomes worn to or
near the "wear limit". In addition, always keep carbon
brushes clean and ensue that they slide freely within
the brush holders.
5. Replacing carbon brushes
Disassemble the brush cap with a slotted-head
screwdriver. The carbon brush can then be easily
removed.
6. Service parts list
CAUTION
Repair, modifi cation 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.
MODIFICATIONS
Hitachi Power Tools are constantly being improved
and modifi ed 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 specifi cations herein are subject to
change without prior notice.
English
Remarks
Standard accessory
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