Manual Hitachi G18DMR (page 12 of 89) (English, German, Dutch, French, Italian, Portuguese, Spanish)

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English

Once the leading edge of the depressed center

wheel is properly abraded, grinding may be

conducted in either direction.

4. Precautions immediately after finishing operation

The wheel continues to rotate after the tool is

switched off.

After switching off the machine, do not put it down

until the depressed center wheel has come to a

complete stop. Apart from avoiding serious

accidents, this precaution will reduce the amount

of dust and swarf sucked into the machine.

NOTE

⅜ To prevent injuries, this product has a function that

prevents unexpected motor rotation when the battery

is inserted. The motor will not run if the battery

is inserter while the switch is still ON. After installing

the battery, turn the switch off and then back on

again.

⅜ The G14DL and G18DL models are equipped with

a protection function that will shut down the tool

in the event of an overload.

Should the tool shut down due to an overload, turn

the power off and then turn it back on again.

An overload that stops tool operation and lasts

more than 10 seconds may not be released by

turning the power off and on. Should this happen,

remove the battery from the tool and reinstall it

before turning on the power switch.

CAUTIONS

⅜ Check that the work piece is properly supported.

⅜ Ensure that ventilation openings are kept clear when

working in dusty conditions.

If it should become necessary to clear dust, first

disconnect the tool from the mains supply (use non-

metallic objects) and avoid damaging internal parts.

⅜ Ensure that sparks resulting from use do not create

a hazard e.g. do not hit persons, or ignite flammable

substances.

⅜ Always use eye and ear protection.

Other personal protective equipment such as dust

mask, gloves, helmet and apron should be worn

when necessary.

If in doubt, wear the protective equipment.

⅜ When the machine is not use, the battery should

be disconnected.

ASSEMBLING AND DISASSEMBLING THE

DEPRESSED CENTER WHEEL (Fig. 2)

CAUTION: Be sure to turn off the switch and pull out the

battery.

1. Assembling (Fig. 2)

(1) Turn the disc grinder upsidedown so that the spindle

is facing upward.

(2) Align the across flats of the wheel washer with the

notched part of the spindle, then attach them.

(3) Fit the protuberance of the depressed center wheel

onto the wheel washer.

(4) Screw the wheel nut onto the spindle.

(5) While pushing the push button with one hand, lock

the spindle by turning the depressed center wheel

slowly with the other hand.

Tighten the wheel nut by using the supplied wrench

as shown in Fig. 2.

2. Disassembling

Follow the above procedures in reverse.

CAUTIONS

⅜ Confirm that the depressed center wheel is mounted

firmly.

⅜ Confirm that the push button is disengaged by

pushing push button two or three times before

switching the power tool on.

MAINTENANCE AND INSPECTION

1. Inspecting the depressed center wheel

Ensure that the depressed center wheel is free of

cracks and surface defects.

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. 4)

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.

999054.

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. 6.

When installing the carbon brush, choose the

direction so that the nail of the carbon brush agrees

with the contact portion outside the brush tube.

Then push it in with a finger as illustrated in Fig.

7. Lastly, install the brush cap.

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 Cleaning of the outside

When the cordless disc grinder is stained, wipe with

a soft dry cloth or a cloth moistened with soapy

water. Do not use chloric solvents, gasoline or paint

thinner, as they melt plastics.

7. Storage

Store the cordless disc grinder in a place in which

the temperature is less than 40°C, and out of reach

of children.

01Eng_G14DMR_WE 11/8/07, 17:2011

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Hitachi G18DMR Manual

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