Hitachi CR 18DV User Manual download pdf (Page 22)

English

Fig. 28

Fig. 29

0.45"

(11.5 mm)

0.12" (3 mm)

Wear limit

Nail ofcarbon brush

Protrusion of

carbon brush

MAINTENANCE AND INSPECTION

WARNING: Be sure to turned off the switch and remove the battery before

maintenance and inspection.

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. Inspecting the screws

Regularly inspect all screws and ensure that they are fully tightened. Should any of the

screws be loosened, retighten them immediately.

WARNING: Using this Cordless Reciprocating Saw 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. 28)

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. 29, Fig. 30.

When installing the carbon brush, choose the

direction so that the nail of the carbon brush (Fig.

29) agrees with the contact portion outside the brush

tube (Fig. 31). Then push it in with a finger.

Lastly, install the brush cap.

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Hitachi CR 18DV User Manual Page 22

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