Bedienungsanleitung Hitachi DH50SA1 (Seite 9 von 50) (Deutsch, Englisch, Holländisch, Französisch, Italienisch, Portugiesisch, Spanisch)

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(2) Mount the core bit shank on the Drill main body

in the same manner as in mounting the drill bit

and the bull point. (Fig. 9)

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

reaches the extremity.

(4) Fit in the guide plate by aligning its concaved

portion with the core bit tip. When the position of

the concave is shifted by turning the guide plate

right or left, the guide plate never slips off even

when the Drill is used in a down ward direction.

(Fig. 10)

2. Drilling holes

(1) Insert the plug into a receptacle.

(2) A spring is built in the center pin. By straightly and

gently pressing it to the wall or floor surface, the

entire surface of the core bit tip attains contact to

start the hole drilling job. (Fig. 11)

(3) When the hole depth reaches approximately 5 mm,

the hole position can be determined.

Then remove the center pin and guide plate from

the core bit and continue the hole drilling job.

CAUTION

When removing the center pin and guide plate,

always disconnect the plug from the power supply

receptacle.

3. How to dismount the core bit (Fig. 12)

(1) By holding the rotary hammer (with the core bit

inserted) in an upward position, drive the rotary

hammer to repeat impact operation two or three

times, whereby the screw is loosened and the rotary

hammer becomes ready for disassembly.

(2) Remove the core bit shank from the rotary hammer,

hold the core bit with one hand, and strongly strike

the head of the hexagonal portion of the core bit

shank with a hand hammer two or three times,

whereby the round head screw is loosened and the

Drill is ready for disassembly.

HOW TO REPLACE GREASE

This machine is of full air-tight construction to protect

against dust and to prevent lubricant leakage.

Therefore, the machine can be used without lubrication

for long periods. Replace the grease as described below.

1. Grease replacement period

After purchase, replace grease after every 6 months

of usage. Ask for grease replacement at the nearest

authorized HITACHI Service Center.

2. Grease replacement

CAUTION

Before replacing the grease, turn the power off and

pull out the power plug.

(1) Remove the crank cover and wipe off the grease

inside. (Fig. 13)

(2) Apply 20 g of Hitachi Electric Hammer Grease A

(standard accessory, contained in tube) to the crank

case.

As the tube contain 30 g of grease, apply 2/3 of

the contained tube.

(3) After replacing the grease, install the crank case

securely.

NOTE

The Hitachi Electric Hammer Grease A is of the low

viscosity type. If necessary, purchase from an

authorized HITACH Service Center.

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. Inspecting the carbon brushes (Fig. 15)

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.

5. Replacement procedure

Loosen the set screw and remove the cap cover.

Remove the brush cap and carbon brush.

After replacing the carbon brush, do not forget to

tighten the brush cap securely and to install the cap

cover.

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 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.

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.

GUARANTEE

We guarantee Hitachi Power Tools in accordance with

statutory/country specific regulation. This guarantee does

not cover defects or damage due to misuse, abuse, or

normal wear and tear. In case of complaint, please send

the Power Tool, undismantled, with the GUARANTEE

CERTIFICATE found at the end of this Handling instruction,

to a Hitachi Authorized Service Center.

01Eng_DH50SA1_WE 9/26/06, 7:50 PM8

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