Bedienungsanleitung Hitachi WR 16 SA (Seite 26 von 29) (Englisch, Dänisch, Schwedisch, Norwegisch, Finnisch)

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2. Extension bar

The extension bar is convenient for working in very

restricted spaces or when the socket provided cannot

reach the bolt to be tightened.

CAUTION

When the extension bar is used the tightening torque

is reduced slightly compared with the ordinary socket.

So it is necessary to operate the tool a little longer to

get the same torque.

3. Universal joint

The universal joint is convenient for impacting nuts

when there is an angle between the socket and

wrench, or when working in a very narrow space.

4. Corner attachment (Model EW-14R)

Use this attachment only when the machine is applied

to the nut or bolt at the right angle.

Optional accessories are subject to change without notice.

APPLICATIONS

⅜ Tightening and loosening various kinds of bolt and

nut.

PRIOR TO OPERATION

1. Power source

Ensure that the power source to be utilized conforms

to the power requirements specified on the product

nameplate.

2. Power switch

Ensure that the power switch is in the OFF position. If

the plug is connected to a power receptacle while the

power switch is in the ON position, the power tool

will start operating immediately, which could cause a

serious accident.

3. Extension cord

When the work area is removed from the power

source, use an extension cord of sufficient thickness

and rated capacity. The extension cord should be

kept as short as practicable.

4. Fixing the side handle

The position of the side handle attached to the hammer

case can be changed by unscrewing the handle (Right

hand screw). Turn the handle to the desired position

for the job and secure the handle by screwing up tight.

5. Mounting the socket

(1) Pin, O-ring type (Fig. 1)

Select a socket matched to the bolt to be tightened or

loosened. Insert the socket on the anvil of the wrench,

and secure it with the pin and ring. When dismantling

the socket, reverse the sequence.

(2) Plunger type (Fig. 2)

Align the plunger located in the square part of the

anvil with the hole in the hex. socket. Then push the

plunger, and mount the hex. socket on the anvil.

Check that the plunger is fully engaged in the hole.

When removing the socket, reverse the sequence.

HOW TO USE

1. Operation of switch (Fig. 3)

The switch in this machine functions as a motor switch

and rotational direction selector switch. When the switch

is set to R indicated in the handle cover, the motor

rotates clockwise to tighten the bolt. When the switch is

set to L, the motor rotates counterclockwise to loosen

the bolt. When the switch is released, the motor stops.

CAUTION

Be sure to turn the switch OFF and wait until the

motor completely stops before changing the direction

of wrench revolution. Switching while the motor is

rotating will result in burning the motor.

2. Tightening and loosening bolts

A hex socket matching the bolt or nut must first be

selected. Then mount the socket on the anvil, and grip

the nut to be tightened with the hex socket. Holding

the wrench in line with the bolt, press the power

switch to impact the nut for several seconds. If the nut

is only loosely fitted to the bolt, the bolt may turn with

the nut, therefore preventing proper tightening. In this

case, stop impact on the nut and hold the bolt head

with a wrench before restarting impact, or manually

tighten the bolt and nut to prevent them slipping.

OPERATIONAL CAUTIONS

1. Confirm the line voltage (Figs. 4)

The available tightening torque is influenced by line

voltage. Reduced line voltage lowers the available

tightening torque.

For example, if you use a 220 V type wrench on a

200 V line the available tightening torque will be

reduced to 70 to 90 %. When extending the power

cord, use an extension cord which is as short as

possible. When the line voltage is low and a long

extension cord is needed a step up transformer should

be used. The relation between the line voltage and

the tightening torque are shown in the figures.

2. Do not touch the bumper or hammer case during

continuous operation

The bumper and hammer case become hot during

continuous screw tightening so be careful not to

touch them at that time.

3. Work at a tightening torque suitable for the bolt

under impact

The optimum tightening torque for nuts and bolts

differs with material and size of the nuts and bolts.

An excessively large tightening torque for a small

bolt may strech or break the bolt. The tightening

torque increases proportionally to the operating time.

Use the correct operating time for the bolt.

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