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27
MAINTENANCE AND INSPECTION
CAUTION:Pull out battery before doing any inspection or maintenance.
1. Inspecting the saw blade:
Since use of a dull saw blade will degrade efficiency and cause possible motor
malfunction, sharpen or replace the saw blade as soon as abrasion is noted.
CAUTION:
If a dull saw blade is used, reactive force is increased during cutting operation. Avoid
the use of the dull saw blade without repair.
2. Check the screws
Loose screws are dangerous. Regularly inspect them and make sure they are tight.
CAUTION:Using this power tool with loosened screws is extremely dangerous.
3. Performance checkup and maintenance of safety cover
Keep the safety cover in good shape for smooth performance at all times. Be sure to make
prompt repair in case of any malfunction.
4. Inspecting the carbon brushes (Fig. 25)
The motor employs carbon brushes which
are consumable parts. Since and
excessively worn carbon brush can result
in motor trouble, replace the carbon brush
with new ones 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.
NOTE:
When replacing the carbon brush with a
new one, be sure to use the Hitachi Carbon
Brush Code No. 999058.
5. Replacing carbon brushes
Take out the carbon brush by first
removing the brush cap and then hooking
the protrusion of the carbon brush with a
slotted-head screw driver, etc., as shown
in Fig. 26, Fig. 27.
When installing the carbon brush, choose
the direction so that the nail of the carbon
brush (Fig. 27) agrees with the contact
portion outside the brush tube (Fig. 28).
Then push it in with a finger.
Lastly, install the brush cap.
Fig. 25
Fig. 26
Wear limit
0.12″ (3mm)
0.45″
(11.5mm)