12
(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.
(2)When fixing working positions of tools such as cold chisel, etc.,
(a) Push the button, release lock and turn the selector lever.
Align
▲
of the selector lever and
of the lever holder as illustrated in
Fig. 7.
(b) Release the button to lock the selector lever.
(c) Turn the grip as illustrated in
Fig. 8
and fix the tool to the desired working direction.
(d) Switch the selector lever to “hammering” according to the procedures mentioned in the above item (1)
and secure the position of the tool.
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.
CAUTION:
When the warming up operation is performed, hold the side handle and the main body
securely with both hands to maintain a secure grip and be careful not to twist your body by the jammed
drill bit.
USING DRILL CHUCK, CHUCK ADAPTER
Note that this machine can be used at “rotation only” if separately sold parts such as drill chuck and chuck
adapter are attached. Use it with the selector lever positioned at “rohammering”.
CAUTION:
During operation, be sure to grip the handle and the side handle firmly to prevent your body from
swaying.
(1) Switching to “rohammering”
For switching to “ro hammering”, follow the same procedures mentioned in [3. When drilling at
“rohammering”].
(2) Drilling
(a) Even if you apply more-than-required pressure to the machine body, drilling can never be performed
as quickly as you expect. Applying more force or pressure to the machine body
than what is needed, on the contrary, damages the drill tip, resulting in the declined working
efficiency and shortened life of this machine.
(b) A drill can snap sometimes when drilling is almost finished. It is important to relax your thrusting
pressure when drilling is nearing the end.
HOW TO HANDLE A CORE BIT
When a core bit is used, large diameter holes and blind holes can be drilled. In this case, use optional
accessories for core bits (such as a center pin and core bit shank) for more efficient operation.
1. Mounting
CAUTION:
Prior to mounting a core bit, always disconnect the plug from the power supply receptacle.
(1) Mount the core bit on the core bit shank.
(Fig. 11)
Before that, feed oil the screw portion of core bit
shank for easy dismounting .
(2) Mount the core bit shank on the main body in the same manner as in mounting the drill bit and the bull
point.
(Fig. 12)
(3) Insert the center pin into the guide plate until it reaches the extremity.
