Makita BHP441 Manual De Instrucciones página 7

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.
• When not operating the tool, always set the reversing
switch lever to the neutral position.
Speed change (Fig. 5)
This tool has a three-gear speed change lever. To change
the speed, first switch off the tool and then slide the speed
change lever to the "1" position for low speed, "2" position
for medium speed or "3" position for high speed. Be sure
that the speed change lever is set to the correct position
before operation. Use the right speed for your job.
NOTE:
• When changing the position from "1" to "3" or from "3"
to "1", it may be a little difficult to slide the speed
change lever. At this time, switch on and run the tool for
a second at the "2" position, then stop the tool and slide
to your desired position.
CAUTION:
• Always set the speed change lever fully to the correct
position. If you operate the tool with the speed change
lever positioned halfway between the "1" position, "2"
position and "3" position, the tool may be damaged.
• Do not use the speed change lever while the tool is
running. The tool may be damaged.
Selecting the action mode (Fig. 6)
This tool employs an action mode change lever. Select
one of the three modes suitable for your work needs by
using this lever.
For rotation only, slide the lever so that it points toward the
mark on the tool body.
For rotation with hammering, slide the lever so that it
points toward the mark on the tool body.
For rotation with clutch, slide the lever so that the it points
toward the mark on the tool body.
NOTE:
• When changing the position from " " to " ", it may be
a little difficult to slide the mode change lever. At this
time, switch on and run the tool for a second at the " "
position, then stop the tool and slide to your desired
position.
CAUTION:
• Always set the lever correctly to your desired mode
mark. If you operate the tool with the lever positioned
halfway between the mode marks, the tool may be
damaged.
Adjusting the fastening torque (Fig. 7)
The fastening torque can be adjusted in 16 steps by turn-
ing the adjusting ring so that its graduations are aligned
with the arrow on the tool body. The fastening torque is
minimum when the number 1 is aligned with the arrow,
and maximum when the number 16 is aligned with the
arrow.
Before actual operation, drive a trial screw into your mate-
rial or a piece of duplicate material to determine which
torque level is required for a particular application.
ASSEMBLY
CAUTION:
• Always be sure that the tool is switched off and the bat-
tery cartridge is removed before carrying out any work
on the tool.
Installing side grip (auxiliary handle)
(Fig. 8)
Always use the side grip to ensure operating safety.
Insert the side grip so that the protrusions on the grip base
fit in between the grooves on the tool barrel. Then tighten
the grip by turning clockwise.
Installing or removing driver bit or drill bit
(Fig. 9)
Turn the sleeve counterclockwise to open the chuck jaws.
Place the bit in the chuck as far as it will go. Turn the
sleeve clockwise to tighten the chuck.
To remove the bit, turn the sleeve counterclockwise.
Installing bit holder (Fig. 10)
Fit the bit holder into the protrusion at the tool foot on
either right or left side and secure it with a screw.
When not using the driver bit, keep it in the bit holders.
Bits 45 mm long can be kept there.
Adjustable depth rod (Fig. 11)
The adjustable depth rod is used to drill holes of uniform
depth. Loosen the clamp screw, set to desired position,
then tighten the clamp screw.
Hook (Fig. 12)
The hook is convenient for temporarily hanging the tool.
This can be installed on either side of the tool.
To install the hook, insert it into a groove in the tool hous-
ing on either side and then secure it with a screw. To
remove, loosen the screw and then take it out.
OPERATION
Hammer drilling operation
CAUTION:
• There is a tremendous and sudden twisting force
exerted on the tool/bit at the time of hole break-
through, when the hole becomes clogged with chips
and particles, or when striking reinforcing rods embed-
ded in the concrete. Always use the side grip (auxiliary
handle) and firmly hold the tool by both side grip and
switch handle during operations. Failure to do so may
result in the loss of control of the tool and potentially
severe injury.
First, slide the action mode change lever so that it points
to the marking. The adjusting ring can be aligned in any
torque levels for this operation.
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