Manual Hitachi DH24DVA (page 14 of 90) (English, German, Dutch, French, Italian, Portuguese, Spanish)

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English

CAUTION:

⅜ Application of force more than necessary will

not only expedite work at all, but will deteriorate

the tip edge of the drill bit and reduce the

service life of the rotary hammer in addition.

⅜ Drill bit may snap off while withdrawing the

rotary hammer from the drilled hole. For

withdrawing, it is important to use a pushing

motion.

⅜ Do not attempt to use the rotary hammer in the

rotation and striking mode with the drill chuck

and chuck adapter attached. This would seriously

shorten the service life of every component of

the machine.

4. When driving wood screws (Fig. 13)

(1) Selecting a suitable driver bit

Employ plus-head screws, if possible, since the

driver bit easily slips off the heads of slotted-head

screws.

(2) Tightening wood screws

Prior to tightening wood screws, make pilot holes

suitable for them in the wooden board. Apply the

bit to the screw head grooves and gently drive the

screws in the holes.

CAUTION:

Exercise care in preparing a pilot hole suitable for

the wood screw taking the hardness of the wood

into consideration. Should the hole be excessively

small or shallow, requiring much power to drive

the screw into it, the thread of the wood screw may

sometimes be damaged.

5. Hammering only

Align the “

” mark with the “ ” mark by rotating

the change lever to set the “Hammering only”

function. (Fig. 8)

(1) Mount the bull point or cold chisel.

6. Using depth gauge (Fig. 12)

(1) Loosen the knob on the side handle, and insert the

depth gauge into the mounting hole on the side

handle.

(2) Adjust the depth gauge position according to the

depth of the hole and tighten the knob bolt securely.

7. How to use the drill bit (taper shank) and the taper

shank adapter

(1) Mount the taper shank adapter to the rotary hammer.

(Fig. 14)

(2) Mount the drill bit (taper shank) to the taper shank

adapter. (Fig. 14)

(3) Turn the switch ON, and drill a hole to prescribed

depth.

(4) To remove the drill bit (taper shank), insert the

cotter into the slot of the taper shank adapter and

strike the head of the cotter with a hammer

supporting on the rest. (Fig. 15)

8. Switching between the “SAVE“ and the “POWER“

modes

The hammering force of the hammer can be

increased or decreased to conform with intended

usage, by operating the shift knob as per Fig. 16.

Adjust the force to match the usage intended.

(1) “SAVE“ mode ... decreased hammering force

This can prevent thin drill bits which are less than

5 mm in diameter, from being bent or broken.

(2) “POWER“ mode ... increased hammering force

⅜ This can be used to speedily and efficiently drill

holes when the drill bits which are being used are

greater than 5 mm in diameter.

⅜ This can be used to drill holes into wood or metal.

CAUTION:

Do not drill holes in wood with the “SAVE“ mode.

There is a likelihood that the motor will burn out

because it can easily lock up due to the low power.

LUBRICATION

Low viscosity grease is applied to this rotary hammer so

that it can be used for a long period without replacing the

grease. Please contact the nearest service center for

grease replacement when any grease is leaking form

loosened screw.

Further use of the rotary hammer despite the grease

shortage causes damage to reduce the service life.

CAUTION:

A specific grease (FG-6A) is used with this machine,

therefore, the normal performance of the machine may

be badly affected by use of different grease. Please be

sure to let one of our service centers to undertake

replacement of the grease.

MAINTENANCE AND INSPECTION

1. Inspecting the tool

Since use of a dull tool will degrade efficiency and

cause possible motor malfunction, sharpen or

replace the tool as soon as abrasion is noted.

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. Cleaning on the outside

When the power tool 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.

5. Storage

Store the power tool in a place in which the

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

children.

6. Service parts list

A: Item No.

B: Code No.

C: No. Used

D: Remarks

CAUTION:

Repair, modification and inspection of Hitachi Power

Tools must be carried out by a Hitachi Authorized

Service Center.

This Parts List will be helpful if presented with the

tool to the Hitachi Authorized Service Center when

requesting repair or other maintenance.

In the operation and maintenance of power tools,

the safety regulations and standards prescribed in

each country must be observed.

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Hitachi DH24DVA Manual

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