Operational Cautions; Maintenance And Inspection - Hitachi DV 14DBL Handling Instructions Manual

15. Switch operation
When the trigger switch is depressed, the tool rotates. When the trigger is released, the tool
○
stops.
The rotational speed of the drill can be controlled by varying the amount that the trigger
○
switch is pulled. Speed is low when the trigger switch is pulled slightly and increases as the
trigger switch is pulled more.
NOTE
A buzzing noise is produced when the motor is about to rotate; This is only a noise, not a
machine failure.
16. For drilling into brick
Excessive pressing force never increases drilling speed. It will not only damage the drill tip
or reduce working effi ciency, but could also shorten the service life of drill bit. Operate the
impact driver drill within 10 – 15 kg pressing force while drilling into brick.
17. Installing/Removing the side handle
CAUTION
Firmly install the side handle. If
loose, the side handle may gyrate
or fall out and cause bodily injury.
(1) Install the side handle so that the
protrusions on the main unit and
grooves on the side handle interlock.
Tighten the grip after checking that
the side handle is not riding on the slip
prevention protrusion (Fig. 16).
(2) Loosen the grip to remove the side
handle.

OPERATIONAL CAUTIONS

1. Resting the unit after continuous work
(1) The power tool is equipped with a temperature protection circuit to protect the motor.
Continuous bolt-tightening work may cause the temperature of the unit to rise, activating
the temperature protection circuit and automatically stopping operation.
If this happens, allow the power tool to cool before resuming use.
(2) After use for continuous tightening wood screw works, rest the unit for 15 minutes or so
when replacing the battery. The temperature of the motor, switch, etc., will rise if the work is
started again immediately after battery replacement, eventually resulting in burnout.

MAINTENANCE AND INSPECTION

1. Inspecting the tool
Since use of a dull tool will degrade effi ciency and cause possible motor malfunction,
sharpen or replace the tool as soon as abrasion is noted.
Concave
Side handle
Loosen
39
English
Rotate preventing
protrusion
Tighten
Slip preventing
protrusion
Fig. 16