Manual Hitachi G 18SH2 Polizor unghiular

Manual

6

English

3. Inspecting the carbon brushes (Fig. 8)

The motor employs carbon brushes which are

consumable parts. Since an excessively worn carbon

brush can result in motor trouble, replace the carbon

brushes with new ones having the same carbon brush

No. ⓐ shown in the fi gure when it becomes worn to or

near the “wear limit” ⓑ. In addition, always keep carbon

brushes clean and ensue that they slide freely within the

brush holders.

4. Replacing carbon brushes (Fig. 8)

G18SH2 • G18U2 • G23SF2 • G23U2 (Fig. 8)

⟨Disassembly⟩

(1) Loosen the D4 tapping screw ⓒ retaining the brush

cover ⓓ and remove the brush cover.

(2) Use the auxiliary hexagonal wrench or small screwdriver

to pull up the edge of the spring ⓔ that is holding down

the carbon brush. Remove the edge of the spring toward

the outside of the brush holder ⓕ.

(3) Remove the end of the pig-tail ⓖ on the carbon brush

ⓗ from the terminal section of brush holder and then

remove the carbon brush from the brush holder.

⟨Assembly⟩

(1) Insert the end of the pig-tail of the carbon brush in the

terminal section of brush holder.

(2) Insert the carbon brush in the brush holder.

(3) Use the auxiliary hexagonal wrench or small screwdriver

to return the edge of the spring to the head of the carbon

brush.

(4) Mount the brush cover and tighten the D4 tapping screw.

G18SR • G18SRU • G23SR • G23SRU

Disassemble the brush caps with a slotted-head

screwdriver. The carbon brushes can then be easily

removed.

5. Replacing supply cord

If the replacement of the supply cord is necessary, it has

to be done by Hitachi Authorized Service Center to avoid

a safety hazard.

6. 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.

CAUTION

In the operation and maintenance of power tools, the

safety regulations and standards prescribed in each

country must be observed.

GUARANTEE

We guarantee Hitachi Power Tools in accordance with

statutory/country specifi c 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.

IMPORTANT

Correct connection of the plug

The wires of the main lead are coloured in accordance

with the following code:

Blue: — Neutral

Brown: — Live

As the colours of the wires in the main lead of this tool may

not correspond with the coloured markings identifying the

terminals in your plug proceed as follows:

The wire coloured blue must be connected to the terminal

marked with the letter N or coloured black. The wire

coloured brown must be connected to the terminal marked

with the letter L or coloured red. Neither core must be

connected to the earth terminal.

NOTE:

This requirement is provided according to BRITISH

STANDARD 2769: 1984.

Therefore, the letter code and colour code may not be

applicable to other markets except The United Kingdom.

Information concerning airborne noise and vibration

The measured values were determined according to

EN60745 and declared in accordance with ISO 4871.

Measured A-weighted sound power level: 101 dB (A).

Measured A-weighted sound pressure level: 90 dB (A).

Uncertainty K: 3 dB (A).

Wear hearing protection.

Vibration total values (triax vector sum) determined

according to EN60745.

Surface grinding:

Vibration emission value

a

h

,

AG

=

5.9 m/s

2

(G18SH2, G18U2, G18SR, G18SRU)

5.2 m/s

2

(G23SF2, G23U2, G23SR, G23SRU)

Uncertainty K = 1.5 m/s

2

The declared vibration total value has been measured in

accordance with a standard test method and may be used

for comparing one tool with another.

It may also be used in a preliminary assessment of exposure.

WARNING

○ The vibration emission during actual use of the power

tool can diff er from the declared total value depending in

the ways in which the tool is used.

○

Identify safety measures to protect the operator that are

based on an estimation of exposure in the actual conditions

of use (taking account of all parts of the operating cycle

such as the times when the tool is switched off and when it

is running idle in addition to the trigger time).

NOTE

Due to HITACHI’s continuing program of research and

development, the specifi cations herein are subject to

change without prior notice.

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