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Инструкция по эксплуатации Страница: 14

Hitachi DH28PC [14/92] English

English

CAUTION

䡬 Exercise care not to excessively prolong driving time,

otherwise, the screws may be damaged by excessive

force.

䡬 Apply the rotary hammer perpendicularly to the screw

head when driving the screw; otherwise, the screw

head or bit will be damaged, or driving force will not

be fully transferred to the screw.

䡬 Do not attempt to use the rotary hammer in the

rotation and hammering function with the chuck

adapter and bit attached.

5. When driving wood screws (Fig. 10)

(1) Selecting a suitable driver bit

Employ cross-recessed screws, if possible, since the

driver bit easily slips off the heads of slotted-head screws.

(2) Driving in wood screws

䡬 Prior to driving in 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

into the holes.

䡬 After rotating the rotary hammer at low speed for a

while until the wood screw is partly driven into the

wood, squeeze the trigger more strongly to obtain

the optimum driving force.

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.

6. Hammering only

This rotary hammer can be set to hammering only

mode by pressing the push button and turning the

change lever to the

mark (Fig. 11).

(1) Mount the bull point or cold chisel.

(2) Press the push button and set the change lever to

mark. (Fig. 12)

The rotation is released, turn the tool and adjust the

tool to desired position. (Fig. 13)

(3) Turn the change lever to

mark. (Fig. 11)

Then bull point or cold chisel is locked.

7. Using stopper (Fig. 14)

(1) Loosen the wing bolt, and insert the stopper into the

mounting hole on the side handle.

(2) Adjust the stopper position according to the depth of

the hole and thighten the wing bolt securely.

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

shank adapter

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

(Fig. 15).

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

adapter (Fig. 15).

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

rests (Fig. 16).

9. Using the side handle

When you wish to change a position of the side

handle, turn grip of the side handle counterclockwise

to loosen it, and then fasten it firmly.

CAUTION:

When boring a hole, there can be a case where the

machine attempts to rotate by the reaction at the

time of penetrating a concrete wall and/or when a tip

of the blade comes in contact with the rebar.

Firmly fasten the side handle and hold the machine

with both of your hands. Unless you hold it securely,

an accident can occur.

HOW TO USE THE CORE BIT

(FOR LIGHT LOAD)

When boring penerating large holes use the core bit (for

light loads). At that time use with the center pin and the

core bit shank provided as optional accessories.

1. Mounting

CAUTION

Be sure to turn power OFF and disconnect the plug

from the receptacle.

(1) Mount the core bit to the core bit shank. (Fig. 17).

Lubricate the thread of the core bit shank to facilitate

disassembly.

(2) Mount the core bit to the rotary hammer (Fig. 18).

(3) Insert the center pin into the guide plate until it stops.

(4) Engage the guide plate with the core bit, and turn the

guide plate to the left or the right so that it does not

fall even if it faced downward. (Fig. 19).

2. How to bore (Fig. 20)

(1) Connect the plug to the power source.

(2) A spring is installed in the center pin.

Push it lightly to the wall or the floor straight.

Connect the core bit tip flush to the surface and start

operating.

(3) When boring about 5 mm in depth the position of the

hole will be established. Bore after that removing the

center pin and the guide plate from core bit.

(4) Application of excessive force will not only expedite

the work, but will deteriorate the tip edge of the drill

bit, resulting in reduced service life of the rotary

hammer.

CAUTION

When removing the center pin and the guide plate,

turn OFF the switch and disconnect the plug from the

receptacle.

3. Dismounting (Fig. 21)

Remove the core bit shank from the rotary hammer

and strike the head of the core bit shank strongly two

or three times with a manual hammer holding the

core bit, then the thread becomes loose and the core

bit can be removed.

GREASE REPLACEMENT

This machine is full air-tight construction to protect

against dust incursion and to prevent lubricant leakage.

This machine can be used without grease replenishment

for an extended period of time. However, perform the

grease replacement to extend the service life. Replace

the grease as described below.

1. Grease Replacement Period

You should look at the grease when you change the

carbon brush. (See item 4 in the section

MAINTENANCE AND INSPECTION.)

Ask for grease replacement at the nearest authorized

Hitachi Service Center.

01Eng_DH28PC_EE.P65 9/27/09, 4:30 PM13

Hitachi DH28PC [14/92] English

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