English
2.Power switch
Ensure that the power switch is in the OFF position. If the plug is connected to a 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 hexagonal hole of the front cover. (Fig. 3)
(3)Return the tool holder to fix the tool.
NOTE
Remove in the reverse order to installation.
HOW TO USE THE ROTARY HAMMER
1. How to drill holes (Fig. 4)
(1)Pull the switch trigger after applying the drill bit tip to the drilling position.
(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 chip or crush (Fig. 5)
By applying the tool tip to the chipping or crushing position, operate the rotary hammer by utilizing its empty weight.
Forcible pressing or thrusting is unnecessary.
3.How to select rotation-hammering and hammering.
(1)
Rotate the selector lever clockwise so that the ▲
mark on the selector lever is aligned with the ▲
mark on the side of the 
mark on the under cover.
(2) Hammering (Fig. 7)
Rotate the selector lever counterclockwise so that the ▲ mark on the selector lever is aligned with
the ▲ mark on the side of the 
mark on the under cover.
CAUTION
Turning the selector lever during motor rotation will rotate the tool accidentally. The selector lever should only be turned when the motor is stopped.
4. Install the stopper (Fig. 8)
(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.
5.Warming up (Fig. 9)
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 unit securely with both hands to maintain a secure grip and be careful not to twist your body by the jammed drill bit.
6.When a taper shank adapter is used. (Fig. 10)
(1) Install drill bit with taper shank in the taper shank adapter.
(2) Turn the power on and drill a base hole to the depth sounded by indicating groove on the drill bit.
(3) After cleaning out dust with a syringe, attach the plug to the anchor tip and drive in the anchor with a manual hammer.
(4) To remove the drill bit (taper shank), insert the cotter into the slot of the taper shank adapter and strike the head of the cotter with a manual hammer supporting on a rest. (Fig. 11)
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 receptacle.
(1)Mount the core bit on the core bit shank. (Fig. 12) Before that, feed oil to 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. 13)
(3)Insert the center pin into the guide plate until it reaches the extremity.
(4)Fit in the guide plate by aligning its concaved portion with the core bit tip. When the position of the concave is shifted by turning the guide plate right or left, the guide plate never slips off even when the drill is used in a downward direction.
(Fig. 14)
2. Drilling holes
(1)Insert the plug into a receptacle.
(2)A spring is built in the center pin. By straightly and gently pressing it to the wall or floor surface, the entire surface of the core bit tip attains contact to start the hole drilling job. (Fig. 15)
7
