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MAINTENANCE AND INSPECTION
CAUTION: Pull out battery before doing any inspection or maintenance.
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.
Wear limit
0.12" (3 mm) |
0.45" |
(11.5 mm)
Fig. 33
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
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.
Nail of carbon brush
Protrusion of carbon brush
Fig. 34
Fig. 35
Contact portion |
outside brush tube |
Fig. 36
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.
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