Manual Hitachi H90SE (page 6 of 33) (English, German, Dutch, French, Italian, Portuguese, Spanish)

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4. Mounting an accessory, such as a bull point, a cutter,

etc.

CAUTION:

Be sure to switch OFF and disconnect the attachment

plug from the receptacle to avoid a serious accident.

NOTE:

For accessories such as a bull point and a cutter, use

only Hitachi genuine parts.

* It is possible to attach an accessory, such as a bull

point, a cutter, etc., with any of the three types of

the accessory shank portion shapes shown below.

Air Tool Shank Bit

Standard Hex. Shank Bit (Combo Type)

Retaining Groove Bit without Collar

⅜ Mounting air tool shank and standard hexagonal

shank tools.

(1) Clean, then smear the accessory shank portion

grease or machine oil.

(2) Move the retainer to open position A and seat

the accessory, such as a bull point, a cutter, etc.,

in the hexagonal hole in the front cover (See

Fig. 1).

(3) Clamp the accessory into place by bringing the

retainer to the clamp position. To make sure that

the accessory is properly mounted, pull on the

accessory. (Fig. 2)

⅜ Mounting standard hexagonal shanks and retaining

groove shanks without collars.

(1) Clean, then smear the accessory shank portion

with grease or machine oil.

(2) Move the retainer to position A. Align the

accessory shank portion so that its recessed

portion is under clamp and seat the accessory,

such as a bull point, a cutter, etc., in the hexagonal

hole in the front cover (See Fig. 3).

(3) Clamp the accessory into place by bringing the

retainer to clamp position B. To make sure that

the accessory is properly mounted, pull on the

accessory. (Fig. 4)

NOTE:

When removing the accessory, such as a bull point, a

cutter, etc., carry out the above procedures in reverse.

HOW TO USE THE DEMOLITION HAMMER

1. Pull the trigger switch after applying the tip of the bit

to the crushing position.

2. Operate this Demolition Hammer by utilizing its empty

weight. The performance will not be better even if it

is pressed or thrust forcibly against the work surface.

Hold this Demolition Hammer with a force just

sufficient to counteract the reaction.

This Demolition Hammer is equipped with a spring

cushion on the handle so that chipping vibration is

not conveyed to the operator.

Operate this Demolition Hammer without forcing the

handle too strongly.

CAUTION

Sometimes the power tool does not begin the striking

stroke even when the motor rotates because the oil

has become thick.

If the power tool is used at low temperatures or if it is

used after a long idle time, this Demolition Hammer

should be kept running in for about five minutes in

order to warm it up.

GREASE REPLACEMENT

This Demolition Hammer is of full air-tight construction

to protect against dust and to prevent lubricant leakage.

Therefore, this Demolition Hammer can be used without

lubrication for long periods. Replace the grease as

described below.

Grease Replacement Period

After purchase, replace grease after every 6 months of

usage. Ask for grease replacement at the nearest

authorized Service Center.

MAINTENANCE AND INSPECTION

CAUTION:

Be sure to switch OFF and disconnect the attachment

plug from the receptacle to avoid a serious accident.

1. Inspecting this Demolition Hammer

Since use of a dull accessory, such as a bull point, a

cutter, etc. will degrade efficiency and cause possible

motor malfunction, sharpen or replace with a new

one 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. Inspecting the retainer (Fig. 1, Fig. 2)

The retainer may become loose due to excessive

use. Always, pay attention to its proper functioning

to securely hold the accessory shank portion. If any

wear and tear is found, bring this Demolition Hammer

to an authorized service center for maintenance

service.

4. 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.

5. Inspecting the carbon brushes (Fig. 5)

The Motor employs carbon brushes which are

consumable parts. When they become worn to or

near the “wear limit”, it results 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 Fig. 5. In

addition, always keep carbon brushes clean and

ensure that they slide freely within the brush holders.

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Hitachi H90SE Manual

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