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(2) Do not apply the entire disc surface to the surface of
the material. As shown in Fig. 1, the sander should be
held at an approximately 15° to 25° angle in relation to
the material surface so that the peripheral portion of the
sanding disc is off ered to the material surface.
(3) Precaution immediately after fi nishing an operation:
After turning the switch OFF, do not put the sander
down until the sanding disc has come to a complete
stop. This precaution will not only prevent a serious
accident, but will also reduce the amount of dust and
swarf sucked into the machine.
2. Polisher operation:
When utilizing this tool as a polisher, set the speed to
low (L) for maximum effi ciency.
(1) Curved surfaces as well as fl at surfaces can be
effi ciently fi nished. Do not excessively push the
polisher against the surface of the material. The weight
of the polisher alone is suffi cient for eff ective polishing.
Excessive pressure will result in a poor fi nish and cause
possible overload to the motor.
(2) Sanding disc, polishing compound or wax should
be selected in accordance with the material and the
desired surface fi nish. Maximum polishing eff ect will be
attained by following the following method:
○ Preliminary polishing with sander using a fi negrain
sanding disc.
○ Polishing with wool bonnet using polishing compound
and/or wax. Apply a small quantity of compound and/
or wax on material surface and polish with the wool
bonnet.
MOUNTING AND DISMOUNTING THE SANDING
DISC AND WOOL BONNET
1. For Sander operation
(1) After placing the sanding disc on the rubber pad, thread
the washer nut onto the spindle.
(2) While holding the spindle with the accessory wrench
(A), as shown in Fig. 2, turn the washer nut clockwise
with accessory wrench (B) to screw it onto the spindle.
Ensure that the washer nut is thoroughly tightened by
using both wrench (A) and (B).
(3) To remove the sanding disc, follow the above
procedures in reverse.
2. For Polisher operation
(1) Insert the washer nut through the rubber pad and thread
it onto the spindle.
(2) While holding the spindle with the accessory wrench
(A), as shown in Fig. 3, turn the washer nut clockwise
with accessory wrench (B) to screw it onto the spindle.
Ensure that the washer nut is thoroughly tightened by
using both wrench (A) and (B).
(3) As shown in Fig. 4, wrap the rubber pad with the hood of
the wool bonnet, and fi rmly secure it by tightening and
tying its draw string. Be sure the excess string is fi rmly
tucked inside the wool bonnet to prevent it from fl ying
out while polishing.
CAUTION
Improper fi tting of the wool bonnet may cause vibration.
(4) To remove the wool bonnet, follow the above
procedures in reverse.
6
MAINTENANCE AND INSPECTION
1. 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.
2. Inspecting the carbon brushes (Fig. 5)
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 fi gure 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.
3. Replacing a carbon brush:
Disassemble the brush cap with a minus-head
screwdriver. The carbon brush can then be easily
removed.
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. Service parts list
A: Item No.
B: Code No.
C: No. Used
D: Remarks
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.
MODIFICATION
Hitachi Power Tools are constantly being improved
and modifi ed 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 specifi cations herein are subject to
change without prior notice.
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