Maintenance And Inspection - Hitachi SV 12V Bedienungsanleitung

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 knob with one hand and the handle
with the other, lightly press the sander against the
surface to be sanded so that the sanding paper
uniformly contacts the surface, as shown in Fig. 6.
DO NOT apply excessive pressure to the sander while
sanding. Excessive-pressure may 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. Changing the rotating Speed (model SV12V only)
SV12V has an electronic control system which can be
use to set the rotating speed between 4000 and 10000
revolutions per minute.
As shown in Fig. 7, dial position "1" is for minimum
speed and position "5" for maximum speed.
MOUNTING THE OPTIONAL ACCESSORIES
1. Mounting the magic pad.
Loosen the six screws.
Remove the pad and attach the magic pad.
CAUTION
Replace the pad only. Use the other parts without
removing them.
2. Mounting the cleaner adapter (for models SV12V
and SV12SD) (Fig. 8).
After mounting the dust collector hose onto the
cleaner adapter, mount the cleaner adapter onto the
unit in the same way as mounting the dust bag.

MAINTENANCE AND INSPECTION

1. Empting and cleaning the Dust Bag (for models
SV12V and SV12SD)
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. Inspecting the carbon brushes (Fig. 10)
The motor employs carbon brushes which are
consumable parts. Since an excessively worn carbon
brush can result in motor trouble, replace the carbon
brush with a new one having the same carbon brush
No. shown in the figure when it becomes worn to or
near the "wear limit". In addition, always keep carbon
brushes clean and ensure that they slide freely within
the brush holders.
7
5. Replacing carbon brushes
Disassembling
(1) Loosen the two screws on the top cover, and remove
the top cover. (Fig.11)
(2) Lift out the brush holder together with the carbon
brush, while being very careful not to forcibly pull
the internal wires within the brush holder.
(3) Remove the carbon brush from the brush holder.
Reassembling
(1) Insert the brush terminal into the brush holder. Turn
the brush terminal 90˚.
(2) While maintaining this brush terminal position as
explained in (1), insert the new carbon brush into the
brush holder.
(3) While pressing the carbon brush against the outside
wall of the housing's bearing compartment, insert
the brush holder into the housing's original position.
(4) Place the internal wire in the specified position. Be
very careful not to allow the internal wire to contact
the armature or rotating parts of the motor. (Fig. 12)
(5) Replace the top cover, while being careful to ensure
it does not pinch the internal wire, and secure it
firmly with the two screws.
CAUTION
Should the internal wire be pinched by the top cover
or come in contact with the armature or rotating
parts of the motor, a serious danger of electric shock
to the operator will be created. Exercise extreme
caution in disassembling and reassembling the motor,
following the above procedure exactly.
DO NOT attempt disassemble any parts other than
those necessary to effect replacement of the carbon
brush.
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 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.
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.