Maintenance And Inspection - Hitachi Koki G 12VA Instrucciones De Manejo

CAUTION
○ Confi rm that the depressed center wheel is mounted
fi rmly.
○ Confi rm that the push button is disengaged by pushing
push button two or three times before switching the
power tool on.

MAINTENANCE AND INSPECTION

1. Inspecting the depressed center wheel
Ensure that the depressed center 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. Inspecting the carbon brushes (Fig. 5)
The Motor employs carbon brushes which are
consumable parts. When they become worn to
or near the "wear limit", it could result in motor
trouble. When an auto-stop carbon brush is equipped,
the motor will stop automatically. At that time, replace
both carbon brushes with new ones which have the same
carbon brush Numbers shown in the fi gure. In addition,
always keep carbon brushes clean and ensure that they
slide freely within the brush holders.
4. Replacing carbon brushes (Fig. 6)
<Disassembly>
(1) Loosen the D4 tapping screw retaining the tail cover and
remove the tail cover.
(2) Use the auxiliary hexagonal wrench or small screwdriver
to pull up the edge of the spring that is holding down the
carbon brush. Remove the edge of the spring toward the
outside of the brush holder.
(3) Remove the end of the pig-tail on the carbon brush from
the terminal section of brush holder and then remove the
carbon brush from the brush holder.
<Assembly>
(1) Insert the end of the pig-tail of the carbon brush in the
terminal section of brush holder.
(2) Insert the carbon brush in the brush holder.
(3) Use the auxiliary hexagonal wrench or small screwdriver
to return the edge of the spring to the head of the carbon
brush.
NOTE
Make sure the end of the spring is not holding the pig-
tail.
(4) Mount the tail cover and tighten the D4 tapping screw.
5. Replacing supply cord
If the replacement of the supply cord is necessary, this
has to be done by the manufacturer of this agent in order
to avoid a safety hazard.
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. 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
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