5
FUNCTIONAL DESCRIPTION
CAUTION:
• Always be sure that the tool is switched off and
unplugged before adjusting or checking function on the
tool.
Switch action (Fig. 1 & 2)
CAUTION:
• Before plugging in the tool, always check to see that
the switch trigger actuates properly and returns to the
“OFF” position when released.
To start the tool, simply pull the switch trigger. Tool speed
is increased by increasing pressure on the switch trigger.
Release the switch trigger to stop.
For continuous operation, pull the switch trigger and then
push in the lock button.
To stop the tool from the locked position, pull the switch
trigger fully, then release it.
A speed adjusting dial is provided so that maximum tool
speed can be limited (variable). Turn the speed adjusting
dial clockwise for higher speed, and counterclockwise for
lower speed.
Lighting up the lamps (Fig. 3)
For Model HP2070F, HP2071F
CAUTION:
• Do not look in the light or see the source of light
directly.
To turn on the lamp, pull the trigger. Release the trigger
to turn it off.
NOTE:
• Use a dry cloth to wipe the dirt off the lens of lamp. Be
careful not to scratch the lens of lamp, or it may lower
the illumination.
• Never use gasoline or thinner to clean the lens of the
lamp, or it will be damaged.
Reversing switch action (Fig. 4)
This tool has a reversing switch to change the direction of
rotation. Move the reversing switch to the
D position (A
side) for clockwise rotation or the
E position (B side)
for counterclockwise rotation.
CAUTION:
• Always check the direction of rotation before operation.
• Use the reversing switch only after the tool comes to a
complete stop. Changing the direction of rotation
before the tool stops may damage the tool.
• If the switch trigger can not be depressed, check to see
that the reversing switch is fully set to position
D (A
side) or
E (B side).
Speed change (Fig. 5)
Two speed ranges can be preselected with the speed
change knob.
To change the speed, turn the speed change knob so
that the arrow on the tool body points toward the “ I ”
position on the knob for low speed or “ II ” position for
high speed.
If it is hard to turn the knob, first turn the chuck slightly in
either direction and then turn the knob again.
CAUTION:
• Use the speed change knob only after the tool comes
to a complete stop. Changing the tool speed before the
tool stops may damage the tool.
• Always set the speed change knob to the correct posi-
tion. If you operate the tool with the speed change knob
positioned halfway between the “ I ” and “ II ” position,
the tool may be damaged.
Selecting the action mode (Fig. 6)
This tool has an action mode change lever. For rotation
with hammering, slide the action mode change lever to
the right (
g symbol). For rotation only, slide the action
mode change lever to the left (
m symbol).
CAUTION:
• Always slide the action mode change lever all the way
to your desired mode position. If you operate the tool
with the lever positioned halfway between the mode
symbols, the tool may be damaged.
ASSEMBLY
CAUTION:
• Always be sure that the tool is switched off and
unplugged before carrying out any work on the tool.
Installing side grip (auxiliary handle) (Fig. 7)
Always use the side grip to ensure operating safety.
Install the side grip so that the teeth on the grip fit in
between the protrusions on the tool barrel.
Then tighten the grip by turning clockwise at the desired
position. It may be swung 360° so as to be secured at
any position.
Installing or removing drill bit
For Model HP2070, HP2070F (Fig. 8)
To install the bit, place it in the chuck as far as it will go.
Tighten the chuck by hand. Place the chuck key in each
of the three holes and tighten clockwise. Be sure to
tighten all three chuck holes evenly.
To remove the bit, turn the chuck key counterclockwise in
just one hole, then loosen the chuck by hand.
After using the chuck key, be sure to return to the original
position.
For Model HP2071, HP2071F (Fig. 9)
Hold the ring and turn the sleeve counterclockwise to
open the chuck jaws. Place the bit in the chuck as far as
it will go. Hold the ring firmly and turn the sleeve clock-
wise to tighten the chuck.
To remove the bit, hold the ring and turn the sleeve coun-
terclockwise.
NOTE:
• If the keyless drill chuck cannot be loosened because
of a drill bit being caught inside the jaws of the chuck,
loosen the drill chuck as follows.
1. Hold the sleeve of the drill chuck firmly with water
pump pliers or the like (Note: Do not hold the retain-
ing ring portion.)
2. Place the wrench 19, adjustable wrench or one of
other appropriate wrenches on the hexagonal nut at
the front of the drill chuck. Turn the wrench clock-
wise as shown in the Fig. 10 to loosen the drill
chuck.
