Maintenance And Inspection - Hitachi G 12VA Instrucciones De Manejo

English
Always use eye and ear protection.
Other personal protective equipment such as dust
mask, gloves, helmet and apron should be worn
when necessary.
If in doubt, wear the protective equipment.
When the machine is not use, the power source
should be disconnected.
ASSEMBLING AND DISASSEMBLING
ACCESSORIES (Fig. 1)
CAUTION: Be sure to switch OFF and disconnect the
attachment plug from the receptacle to avoid
a serious accident.
<DEPRESSED CENTER WHEEL>
1. Assembling (Fig. 1)
(1) Turn the equipment upside-down so that the spindle
will be facing up.
(2) Mount the wheel washer onto the spindle.
(3) Fit the protuberance of the depressed center wheel
onto the wheel washer.
(4) Screw from above the wheel nut onto the spindle.
(5) As shown in Fig. 1, push in the push button to
prevent rotation of the spindle. Then, secure the
depressed center wheel by tightening the wheel nut
with the wrench.
2. Disassembling
Follow the above procedures in reverse.
<RADIAL GRINDING DISC/DIAMOND WHEEL>
Same as depressed center wheel.
<SANDING DISC>
1. Assembling (Fig. 1)
(1) Turn the equipment upside-down so that the spindle
will be facing up.
(2) After placing the sanding disc on the rubber pad,
thread the washer nut onto the spindle.
(3) Press the push button to secure the spindle and
tighten the washer nut with a wrench.
2. Disassembling
Follow the above procedures in reverse.
CAUTIONS
Confirm that the depressed center wheel is mounted
firmly.
Confirm 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.
9
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 figure. 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
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 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 (i.e. code numbers and/or
design) may be changed without prior notice.