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MOUNTING AND DISMOUNTING THE SAW
BLADE
CAUTION
To avoid serious accident, ensure the switch is in the OFF
position, and the power source is disconnected.
1. Dismounting the saw blade
(1) Set the cutting depth to maximum and place the
circular saw in a rigid position (Fig. 5).
(2) Keeping the lock lever depressed, carefully turn the
bolt with the supplied box wrench.
(3) When the saw shaft is fi xed, turn the box wrench
counterclockwise to remove bolt and washer (B).
(4) While gripping the lower guard knob, retract the lower
guard into the saw cover and take out the saw blade.
2. Mounting the saw blade
(1) Install the saw blade in the reverse order to removal.
(2) Wipe off the swarf from the spindle, washer, etc.
(3) When installing a saw blade with a hole diameter of
19 mm, such as the HITACHI genuine part, install
washer (A) so that the deeper groove faces toward
the saw blade. When installing a saw blade with a
hole diameter of 20 mm, install washer (A) so that the
shallow groove faces toward the saw blade. In both
cases, install washer (B) so that the groove faces
toward the saw blade. (Fig. 6).
CAUTION
When reinstalling the saw blade, do not forget to
install the distance piece. The size of the distance
piece diff ers from that of the optionally available one
(refer to 7. Groove cutter, page 6). Always install the
correct distance washer.
(4) The saw blade should be installed so that the arrow
on the saw blade is aligned with the arrow on the saw
cover.
(5) Tighten the bolt securely.
CAUTIONS
○ If a box wrench other than the one supplied is used,
the bolt cannot be tightened correctly. Always use the
supplied box wrench.
○ Before connecting the power cord, check that the lock
lever is returned to its original position and the saw blade
rotates smoothly.
MAINTENANCE AND INSPECTION
1. Inspecting the saw blade
Since use of a dull saw blade will cause motor
malfunctioning and degraded effi ciently, whet it or
replace with a new one without delay when abrasion is
noted.
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.
3. 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.
4. Inspecting the carbon brushes (Fig. 7)
The motor employs carbon brushes which are
consumable parts. Since an excessively worn carbon
brush could result in motor trouble, replace the carbon
brushes with new ones which having the same carbon
brush No. shown in the fi gure 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.
○ Replacing carbon brushes
Disassemble the brush cap with a slotted-head
screwdriver. The carbon brush can then be easily
removed.
5. Inspecting
lower
maintenance
Carefully maintain the lower guard so that it remains
capable of smoothly functioning. Completely remove
sawdust deposited around the rotary portion of the lower
guard, and then apply spindle oil to its siding section to
attain better functioning.
6. 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.
MODIFICATIONS
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.
English
guard
functioning
and
its
8
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