Manual Hitachi DH 40 MRY (page 10 of 60) (English, German, Dutch, French, Italian, Portuguese, Spanish)

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4. When chipping and chiseling at “hammering”:

CAUTION:

⅜ If the selector lever is switched during motor rotation,

the tool can start to rotate abruptly, resulting in

unexpected accidents. Make sure to switch the

selector lever when the motor is at a complete stop.

⅜ If the bull point or cold chisel is used at the position

of ”rotation + hammering”, the tool can start to

rotate, resulting in unexpected accidents. Make

sure that they are used at the position of

”hammering”.

(1) Switching to ”hammering”

(a) Push the button, release lock and turn the selector

lever counterclockwise.

(b) Align ▲ of the selector lever and

of the lever

holder as illustrated in Fig. 7.

NOTE:

Turn the selector lever (do not push the button) to

check if it is completely locked and make sure that

it does not turn.

(2) When fixing working positions of tools such as cold

chisel, etc.,

(a) Push the button, release lock and turn the selector

lever.

Align ▲ of the selector lever and



of the lever

holder as illustrated in Fig. 8.

(b) Release the button to lock the selector lever.

tool to the desired working direction.

(d) Switch the selector lever to “hammering”

according to the procedures mentioned in the

above item (1) and secure the position of the tool.

5. Install the stopper (Fig. 10)

(1) Loosen the side handle and insert the straight portion

of the stopper into the handle bolt hole.

(2) Move the stopper to the specified position and

rotate the grip of the side handle clockwise to fix

the stopper.

6. Warming up (Fig. 11)

The grease lubrication system in this unit may

require warming up in cold regions.

Position the end of the bit so makes contact with

the concrete, turn on the switch and perform the

warming up operation. Make sure that a hitting

sound is produced and then use the unit.

CAUTION:

When the warming up operation is performed, hold

the side handle and the main body securely with

both hands to maintain a secure grip and be careful

not to twist your body by the jammed drill bit.

DRILLING AND DRIVING-IN OPERATIONS FOR

ANCHORS

1. When a taper shank adapter is used. (Fig. 12)

(1) Install drill bit with taper shank in the taper shank

adapter.

(2) Turn the power on and drill a base hole to the depth

sounded by indicating groove on the drill bit.

(3) After cleaning out dust with a syringe, attach the

plug to the anchor tip and drive in the anchor with

a manual hammer.

Releasing the grip reverts the grip and secures the

tool in place.

(3) Pull the tool to make sure it is locked completely.

(4) To remove the tool, fully pull the grip in the direction

of the arrow and pull out the tool.

5. Regulating the number of rotations and hammering

(Fig. 3)

This Rotary Hammer is equipped with a built-in

electronic control circuit that can adjust and regulate

the number of rotations and times of hammering.

This Rotary Hammer can be used by adjusting the

dial, depending upon the contents of operation,

such as boring holes into fragile materials, chipping,

centering, etc.

The scale ‘1’ of the dial is designed for a minimum

speed with the number of 240 rotations per minute

and 1320 times of blow per minute. The scale ‘6’

is designed for a maximum speed with the number

of 480 rotations per minute and 2650 times of blow

per minute.

CAUTION:

Do not adjust the dial during operation. Doing so

can result in injury because the Rotary Hammer

must be held by only one hand, disabling the steady

control of the Rotary Hammer.

HOW TO USE THE ROTARY HAMMER

1. How to drill holes (Fig. 4)

(1) Pull the switch trigger after applying the drill bit

tip to the drilling position.

(2) It is unnecessary to forcibly press the rotary hammer

main body. It is sufficient to slightly press the rotary

hammer to an extent that shavings are freely

discharged.

CAUTION:

Although this machine is equipped with a safety

clutch, if the drill bit becomes bound in concrete

or other material, the resultant stoppage of the drill

bit could cause the machine body to turn in reaction.

Ensure that the main handle and side handle are

gripped firmly during operation.

2. How to chisel or crush (Fig. 5)

By applying the drill bit tip to the chiseling or

crushing position, operate the rotary hammer by

utilizing its empty weight.

Forcible pressing or thrusting is unnecessary.

3. When drilling at “rotation + hammering”:

CAUTION:

If you switch the selector lever during motor rotation,

the tool can start to rotate abruptly, resulting in

unexpected accidents. Be sure to switch the selector

lever when the motor is at a complete stop.

(1) Switching to “rotation + hammering”

(a) Push the button, release lock and turn the selector

lever clockwise.

(b) Align ▲ of the selector lever and

of the lever

holder as illustrated in Fig. 6.

NOTE:

Turn the selector lever (do not push the button) to

check if it is completely locked and make sure that

it does not turn.

01Eng_DH40MRY_WE 08/7/31, 10:139

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Hitachi DH 40 MRY Manual

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