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MAINTENANCE AND INSPECTION
1. Inspecting the blades
Continued use of dull or damaged blades will result
in reduced cutting efficiency and may cause
overloading of the motor. Sharpen or replace the
blades as often as necessary.
2. Handing
CAUTION
The front base, rear base, and cutting depth control
portion are precisely machined to obtain specifically
high precision. If these parts are roughly handled
or subjected to heavy mechanical impact, it may
cause inaccurate precision and reduced cutting
performance. These parts must be handled with
particular care.
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. Inspecting the carbon brushes (Fig. 14)
The motor employs carbon brushes which are
consumable parts. Since excessively worn carbon
brushes could result in motor trouble, replace the
carbon brushes with new ones which have the same
carbon brush No. shown in figure when they become
worn to or near the "wear limit". In addition, always
keep carbon brushes clean and ensure that they
slide freely within the brush holders.
44
6 mm
17 mm
6. Replacing carbon brushes
After removing the chip cover, use a screwdriver to
disassemble the brush caps. The carbon brushes
can then be easily removed.
NOTE
Due to HITACHI's continuing program of research and
development, the specifications herein are subject to
change without prior notice.
5
Wear limit
No. of carbon
brush
Fig. 14
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