Operation; Maintenance - Makita HK1820 Instruction Manual

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
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.
Speed change
Fig.2
The blows per minute can be adjusted just by turning
the adjusting dial. This can be done even while the tool
is running. The dial is marked 1 (lowest speed) to 5 (full
speed).
Refer to the table below for the relationship between the
number settings on the adjusting dial and the blows per
minute.
Number on adjusting dial
5
4
3
2
1
008531
CAUTION:
The speed adjusting dial can be turned only as far
•
as 5 and back to 1. Do not force it past 5 or 1, or
the speed adjusting function may no longer work.
ASSEMBLY
CAUTION:
Always be sure that the tool is switched off and
•
unplugged before carrying out any work on the
tool.
Installing or removing the bit
Fig.3
Clean the bit shank before installing the bit.
Insert the bit into the tool. Turn the bit and push it in until
it engages.
Blows per minute
3,200
2,900
2,600
2,300
2,000
Fig.4
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.
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.5
Bit angle
Fig.6
Fig.7
The bit can be secured at 12 different angles. To
change the bit angle, slide the change ring forward, then
turn the change ring to change the bit angle. At the
desired angle, slide the change ring back to the original
position. The bit will be secured in place.
Hook
Fig.8
When connecting the power supply cord to an extension
cord, use the hook so that the plug of power supply cord
cannot be disconnected from the connector of extension
cord. Set it on the extension cord 10 cm - 20 cm away
from the connector of the extension cord.

OPERATION

Fig.9
Position the bit at the location to be chipped, then pull
the switch trigger. Apply slight pressure on the tool so
that the tool will not bounce around, uncontrolled.
Pressing very hard on the tool will not increase the
efficiency.
Fig.10
NOTE:
When removing tiles with a scaling chisel, apply
•
the chisel to the bottom of tiles as shown in the
figure. If you operate the tool with the chisel
applied to the top surface of tiles, the service life of
the chisel will be shortened.

MAINTENANCE

CAUTION:
Always be sure that the tool is switched off and
•
unplugged before attempting to perform inspection
or maintenance.
Never use gasoline, benzine, thinner, alcohol or
•
the like. Discoloration, deformation or cracks may
result.
To maintain product SAFETY and RELIABILITY, repairs,
carbon brush inspection and replacement, any other
maintenance or adjustment should be performed by
Makita Authorized Service Centers, always using Makita
replacement parts.
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