Makita HR4500C Manuel D'instructions page 7

OPERATING INSTRUCTIONS
Installing or removing bit
CAUTION:
Always be sure that the tool is switched off and
unplugged before installing or removing the bit.
Clean the bit shank and apply the bit grease provided
to it before installing the bit. (Fig. 1)
Insert the bit into the tool. Turn the bit and push it in
until it engages. (Fig. 2)
If the bit cannot be pushed in, remove the bit. Pull the
chuck cover down a couple of times. Then insert the
bit again. Turn the bit and push it in until it engages.
(Fig. 3)
After installing, always make sure that the bit is
securely held in place by trying to pull it out.
To remove the bit, pull the chuck cover down all the
way and pull the bit out. (Fig. 4)
Selecting action mode
Rotation with hammering (Fig. 5 & 6)
For drilling in concrete, masonry, etc., depress the
lock button and rotate the change lever so that the
pointer points to the
carbide tipped bit.
Hammering only (Fig. 5 & 7)
For chipping, scaling or demolition operations,
depress the lock button and rotate the change lever
so that the pointer points to the
point, cold chisel, scaling chisel, etc.
CAUTION:
• Do not rotate the change lever when the tool is
running under load. The tool will be damaged.
• To avoid rapid wear on the mode change mecha-
nism, be sure that the change lever is always
positively located in one of the two action mode
positions.
Bit angle
(when chipping, scaling or demolishing)
CAUTION:
Always be sure that the tool is switched off and
unplugged before changing the bit angle.
The bit can be secured at 16 different angles. To
change the bit angle, depress the lock button and
rotate the change lever so that the pointer points to
the V symbol. Turn the bit to the desired angle.
(Fig. 8)
Depress the lock button and rotate the change lever
so that the pointer points to the
Then make sure that the bit is securely held in place
by turning it slightly.
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symbol. Use a tungsten-
symbol. Use a bull
symbol. (Fig. 9)
Side handle (Fig. 10)
CAUTION:
Use the side handle only when chipping, scaling or
demolishing. Do not use it when drilling in concrete,
masonry, etc. The tool cannot be held properly with
this side handle when drilling.
The side handle can be swung 360° on the vertical
and secured at any desired position. It also secures at
eight different positions back and forth on the horizon-
tal. Just loosen the clamp nut to swing the side handle
to a desired position. Then tighten the clamp nut
securely.
Side grip (Fig. 11)
CAUTION:
Always use the side grip to ensure operating safety
when drilling in concrete, masonry, etc.
The side grip swings around to either side, allowing
easy handling of the tool in any position. Loosen the
side grip by turning it counterclockwise, swing it to the
desired position and then tighten it by turning clock-
wise.
Switch action (Fig. 12)
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 trigger. Release the
trigger to stop.
Speed change (Fig. 13)
The revolutions and blows per minute can be adjusted
just by turning the adjusting dial. The dial is marked 1
(lowest speed) to 6 (full speed). Refer to the table
below for the relationship between the number set-
tings on the adjusting dial and the revolutions/blows
per minute.
Number on Revolutions
adjusting dial per minute
6 240
5 230
4 200
3 160
2 130
1 120
Blows per
minute
2,550
2,450
2,100
1,700
1,300
1,250
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