Maintenance - Makita HM1202 Instruction Manual

OPERATING INSTRUCTIONS
Installing or removing bit
Important:
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)
Pull the tool holder cover down all the way. (Fig. 2)
Insert the bit into the tool. Turn the bit and push it in
until it engages. (Fig. 3-1)
Release the tool holder cover. It will return automati-
cally to its original position to secure the bit.
(Fig. 3-2)
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 tool holder cover down all
the way and pull the bit out. (Fig. 4)
Bit angle (Fig. 5)
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.
NOTE:
The change ring cannot turn when the bit is not
installed on the tool.
Side handle (auxiliary handle)
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 hori-
zontal. Just loosen the clamp nut to swing the side
handle to a desired position. Then tighten the clamp
nut securely. (Fig. 6)
The side handle also can be mounted in the rear
groove as shown in Fig. 7. Loosen the clamp nut and
widen the side handle base. Slide the side handle
back to the rear groove and secure it with the clamp
nut. (Fig. 7)
Switch action (Fig. 8)
CAUTION:
Before plugging in the tool, always check to see that
the tool is switched off.
To start the tool, push the switch lever on the left side
of the tool. To stop the tool, push the switch lever on
the right side of the tool.
6
Speed change (Fig. 9)
For HM1202C only
The blows per minute can be adjusted between 950
and 1,900 BPM just by turning the adjusting dial. This
can be done even while the tool is running. The dial is
marked 1 (lowest speed) to 6 (full speed). Refer to
the table below for the relationship between the num-
ber settings on the adjusting dial and the blows per
minute.
Number on adjusting dial
6
5
4
3
2
1
Chipping / Scaling / Demolition (Fig. 10)
Hold the tool firmly with both hands. Turn the tool on
and 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.
Indicator lamp (Fig. 11)
For HM1202C only
The green power-ON indicator lamp lights up when
the tool is switched ON. If the indicator lamp is lit but
the tool does not start, the carbon brushes may be
worn out, or the electric circuit or the motor may be
defective. If the indicator lamp does not light up and
the tool does not start, the ON/OFF switch or the
mains cord may be defective.
The red service indicator lamp lights up when the
carbon brushes are nearly worn out to indicate that
the tool needs servicing. After approx. 8 hours of use,
the motor will automatically be shut off.

MAINTENANCE

CAUTION:
Always be sure that the tool is switched off and
unplugged before carrying out any work on the tool.
Replacement of carbon brushes (Fig. 12 & 13)
Whenever carbon brushes must be replaced, they
cut out the tool automatically. When this occurs,
loosen the screws which secure the rear cover. Pry
up the rear cover with a screwdriver and remove it.
Then replace both carbon brushes at the same time.
Use only identical carbon brushes.
Blows per minute
1,900
1,800
1,600
1,300
1,050
950