Hitachi Koki SV 12SG, Handling Instructions Manual, Page: 6 / 41

5
English
CAUTION
Never turn the power switch ON when the sander is
contacting the surface to be sanded. This is necessary
to preclude damage to the material. The same applies
when switching the power OFF.
2. How to hold the orbital sander
While gripping the housing, lightly press the sander
against the surface to be sanded so that the sanding
paper uniformly contacts the surface, as shown in
Fig. 5 . DO NOT apply excessive pressure to the sander
w hile sanding. Excessive-pressure m ay cause
overload of the motor, reduced service life of the
sanding paper, and lowered sanding or polishing
efficiency.
3. How to move the orbital sander
For optimum operating efficiency, alternately move
the sander forward and backward at a constant speed
and balance.
4. After installing new sanding paper
M ovem ent of the sander m ay tend to becom e
unsteady after new sanding paper has been installed,
because of the new, coarse grain of the paper. This
can be avoided by slightly tilting the sander forward
or backward during sanding or polishing. Sander
movement will become steady as the sanding paper
surface becomes properly abraded.
MOUNTING THE OPTIONAL ACCESSORIES
1. Attaching a Sponge Pad (Velcro type) or a Stick-on
pad
Loosen the M 4
×
10 screw s (4) and rem ove the
attached pad. Next, attach a sponge pad (Velcro type)
or a stick-on pad.
CAUTION
Replace the pad only. Use the other parts without
removing them.
2. Attaching Velcro Type Sanding Paper or Stick-on
Type sanding Paper
Match the sanding paper’s hole with the pad’s hole
and strongly push the sanding paper with the palm
of your hand to fasten it securely in place.
3. Making a Hole in the Sanding Paper with the Punch
Plate (Fig. 6)
When using sanding paper without holes in it, punch
holes in it with the punch plate to improve dust
collecting capacity.
MAINTENANCE AND INSPECTION
1. Empting and cleaning the Dust Bag
If the dust bag contains too much saw dust, dust
collection will be affected. Empty the dust bag when
it gets full.
Remove the dust bag, open the fastener, and dispose
of the contents.
2. Inspecting the sanding paper
Since use of worn-out sanding paper will degrade
efficiency and cause possible damage to the pad,
replace the sanding paper as soon a excessive
abrasion is noted.
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. 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.
5. Servicing
Consult an authorized Service Agent in the event of
power tool failure.
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 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 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.
Information concerning airborne noise and vibration
The measured values were determined according to
EN60745 and declared in accordance with ISO 4871.
The typical A-weighted sound pressure level: 83 dB (A).
Uncertainty KpA: 3 dB (A).
Wear ear protection.
The typical w eighted root m ean square acceleration
value does not exceed 2.5 m/s
2
.