Manual Hitachi VTP-16A (page 7 of 40) (English, German, Dutch, French, Italian, Portuguese, Spanish)

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English

When boring concrete, stone, tile or similar hard

materials, turn the change ring fully clockwise. The

drill head impacts against the material while

continuing to rotate.

When boring metal, wood or plastic, turn the change

ring fully counterclockwise. The drill simply rotates

as an ordinary electric drill.

CAUTION

Do not use the Impact Drill in the IMPACT function if

the material can be bored by rotation only. Such

action will not only reduce drill efficiency, but may

also damage the drill tip.

When changing over, ensure that the change ring is

turned as far as it will go.

8. Fixing the side handle.

Loosen the glip on the side handle, and attach the

side handle to the gear cover in a position convenient

for drilling. Match the projecting part of the handle to

the groove on the gear cover, and firmly tighten the

glip.

To remove the side handle, loosen the glip, and

rotate the handle.

To attach a depth stopper on the side handle, insert

the stopper into the hexagon hole groove on the side

handle, adjust the position of the depth stopper in

accordance with the desired depth of the hole, and

firmly tighten the glip.

PRACTICAL HANDLING PROCEDURES

1. Pressure:

Drilling will NOT be accelerated by placing heavy

pressure on the drill. Such action will only result in a

damaged drill bit, decreased drilling efficiency and/

or shortened service life of the drill.

2. Using a large diameter drill bit:

The larger the drill bit diameter, the larger the reactive

force on your arm. Be careful not to lose control of

the drill because of this reactive force. To maintain

firm control, establish a good foothold, hold the drill

tightly with both hands, and ensure that the drill is

vertical to the material being drilled.

3. When drilling completely through the material:

When the drill bit bores completely through the

material, careless handling often results in a broken

drill bit or damage to the drill body itself due to the

sudden movement of the drill.

Always be alert and ready to release the pushing

force when drilling through the material.

4. Switch operation:

(1) VTP-16A:

By pulling the trigger switch and depressing the

stopper, the switch is held in the ON position for

continuous operation. To turn the drill OFF, pull the

trigger switch again and release.

(2) VTV-16:

The rotational speed of the drill bit can be controlled

by varying the amount that the trigger switch is pulled.

Speed is low when the trigger switch is pulled slightly

and increases as the switch is pulled more. Continuous

operation may be attained by pulling the trigger switch

and depressing the stopper. To turn the switch OFF,

pull the trigger switch again to disengage the stopper,

and release the trigger switch to its original position.

5. Precautions on boring

The drill may become overheated during operation;

however, it is sufficiently operable. Do not cool the

drill bit in water or oil.

6. Caution concerning immediately after use

Immediately after use, while it is still revolving, if the

Drill is placed on a location where considerable

ground chips and dust have accumulated, dust may

occasionally be absorbed into the Drill mechanism.

Always pay attention to this possibility.

MAINTENANCE AND INSPECTION

1. Inspection the drill bit

Continued use of a worn and/or damaged drill bit will

result in reduced drilling efficiency and may seriously

overload the drill motor. Inspect the drill bit often and

replace it with a new bit as necessary.

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. Inspecting the carbon brushes (Fig. 3)

The Motor employs carbon brushes which are

consumable parts. When they become worn to or

near the “wear limit”, it could result in motor trouble.

When an auto-stop carbon brush is equipped, the

motor will stop automatically.

At that time, replace both carbon brushes with new

ones which have the same carbon brush Numbers

shown in the figure. In addition, always keep carbon

brushes clean and ensure that they slide freely within

the brush holders.

4. Replacing carbon brushes

Disassemble the brush caps with a slotted-head

screwdriver. The carbon brushes can then be easily

removed.

5. 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.

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 an Authorized Service

Center.

This Parts List will be helpful if presented with the

power tool to the 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.

MODIFICATIONS

Hitachi Power Tools are constantly being improved

and modified to incorporate the latest technological

advancements.

Accordingly, some parts (i.e. code numbers and/or

design) may be changed without prior notice.

01Eng_VTP-16A_WE 08/10/31, 09:326

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Hitachi VTP-16A Manual

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