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18
1. Inspecting the blade
Continued use of a dull or damaged blade will result
in reduced cutting efficiency and may cause
overloading of the motor. Replace the blade with a
new one as soon as excessive abrasion is noted.
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. 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. 33)
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 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. 34, Fig. 35.
When installing the carbon brush, choose the
direction so that the nail of the carbon brush (Fig.
34) agrees with the contact portion outside the brush
tube (Fig. 36). Then push it in with a finger.
Lastly, install the brush cap.
MAINTENANCE AND INSPECTION
CAUTION:
Pull out battery before doing any inspection or maintenance.
CAUTION:
Be absolutely sure to insert the nail of the carbon
brush into the contact portion outside the brush
tube. (You can insert whichever one of the two
nails provided.)
Caution must be exercised since any error in this
operation can result in the deformed nail of the
carbon brush and may cause motor trouble at an
early stage.
6. Check for Dust
Dust may be removed with a soft cloth or a cloth
dampened with soapy water.
Do not use bleach, chlorine, gasoline or thinner, for
they may damage the plastics.
Protrusion of
carbon brush
Nail of carbon brush
Fig. 34
Fig. 35
Fig. 36
Contact portion
outside brush tube
Fig. 33
0.45"
(11.5 mm)
0.12" (3 mm)
Wear limit
01Eng_CR14DSL_US 5/25/11, 2:15 PM18