Prior To Operation - Hitachi DH 40FR Bedienungsanleitung

English

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. How to install dust cover (Fig. 1)
Always install the dust cover on the drill bit or the
taper shank adapter.
Insert the dust cover until it lies flush in the groove.
NOTE
For a thick drill bit, insert the dust cover from drill
rear.
5. How to install tool
NOTE
For tools such as a bull point and a cold chisel, use
only Hitachi genuine parts.
(1) Clean, then smear the tool shank with the grease
provided in the green tube (Fig. 2).
(2) Pull the tool holder in the direction of arrow A and
rotate it in the direction of arrow B (counterclockwise).
Fully insert the tool shank into the hexagonale hole
of the front cover. (Fig. 3)
(3) Return the tool holder to fix the tool.
(4) Pull the tool to make sure it is locked completely.
NOTE
Remove in the reverse order to installation.
6. Regulating the number of rotations and hammering
(Fig. 4)
This Rotary Hammer is equipped with a built-in
electronic control circuit that can adjust and regulate
the number of rotations and times of hammering. This
Rotary Hammer can be used by adjusting the dial,
depending upon the contents of operation, such as
boring holes into fragile materials, chipping,
centering, etc.
The scale '1' of the dial is designed for a minimum
speed with the number of 240 rotations per minute
and 1320 times of blow per minute. The scale '6' is
designed for a maximum speed with the number of
480 rotations per minute and 2650 times of blow per
minute.
CAUTION
Do not adjust the dial during operation. Doing so can
result in injury because the Rotary Hammer must be
held by only one hand, disabling the steady control
of the Rotary Hammer.
HOW TO USE THE ROTARY HAMMER
1. How to drill holes (Fig. 5)
(1) Pull the switch trigger after applying the drill bit tip to
the drilling position.
7
(2) It is unnecessary to forcibly press the rotary hammer
main body. It is sufficient to slightly press the rotary
hammer to an extent that shavings are freely
discharged.
CAUTION
Although this machine is equipped with a safety
clutch, if the drill bit becomes bound in concrete or
other material, the resultant stoppage of the drill bit
could cause the machine body to turn in reaction.
Ensure that the main handle and side handle are
gripped firmly during operation.
2. How to chisel or crush (Fig. 6)
By applying the drill bit tip to the chiseling or crushing
position, operate the rotary hammer by utilizing its
empty weight.
Forcible pressing or thrusting is unnecessary.
3. When drilling at "rotation + hammering":
CAUTION
If you switch the selector lever during motor rotation,
the tool can start to rotate abruptly, resulting in
unexpected accidents. Be sure to switch the selector
lever when the motor is at a complete stop.
(1) Switching to "rotation + hammering"
(a) Push the button, release lock and turn the selector
lever clockwise.
(b) Align of the selector lever and
holder as illustrated in Fig. 7.
(c) Release the button to lock the selector lever.
NOTE
Turn the selector lever (do not push the button) to
check if it is completely locked and make sure that it
does not turn.
4. When chipping and chiseling at "hammering":
CAUTION
If the selector lever is switched during motor rotation,
the tool can start to rotate abruptly, resulting in
unexpected accidents. Make sure to switch the
selector lever when the motor is at a complete stop.
If the bull point or cold chisel is used at the position
of "rotation + hammering", the tool can start to rotate,
resulting in unexpected accidents. Make sure that they
are used at the position of "hammering".
(1) Switching to "hammering"
(a) Push the button, release lock and turn the selector
lever counterclockwise.
(b) Align of the selector lever and
holder as illustrated in Fig. 8.
(c) Release the button to lock the selector lever.
NOTE
Turn the selector lever (do not push the button) to
check if it is completely locked and make sure that it
does not turn.
5. Install the stopper (Fig. 9)
(1) Loosen the side handle and insert the straight portion
of the stopper into the handle bolt hole.
(2) Move the stopper to the specified position and rotate
the grip of the side handle clockwise to fix the stopper.
6. Warming up (Fig. 10)
The grease lubrication system in this unit may require
warming up in cold regions.
Position the end of the bit so makes contact with the
concrete, turn on the switch and perform the warming
up operation. Make sure that a hitting sound is
produced and then use the unit.
of the lever
of the lever