Functional Description; Operation; Maintenance - Makita HM1202 Instruction Manual

WARNING:
DO NOT let comfort or familiarity with product
(gained from repeated use) replace strict adherence
to safety rules for the subject product.
MISUSE or failure to follow the safety rules stated in
this instruction manual may cause serious personal
injury.

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 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.
Speed change (Fig. 2)
For HM1202C only
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 6 (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
6
5
4
3
2
1
CAUTION:
• The speed adjusting dial can be turned only as far as 6
and back to 1. Do not force it past 6 or 1, or the speed
adjusting function may no longer work.
Indicator lamp (Fig. 3)
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.
ASSEMBLY
CAUTION:
• Always be sure that the tool is switched off and
unplugged before carrying out any work on the tool.
Blows per minute
1,900
1,800
1,600
1,300
1,050
950
Side handle (auxiliary handle) (Fig. 4 & 5)
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 horizontal. Just
loosen the clamp nut to swing the side handle to a
desired position. Then tighten the clamp nut securely.
The side handle also can be mounted in the rear groove.
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.
Installing or removing the bit (Fig. 6, 7 & 8)
Clean the bit shank and apply bit grease before installing
the bit.
Insert the bit into the tool. Turn the bit and push it in until
it engages.
If the bit cannot be pushed in, remove the bit. Pull the tool
holder 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 tool holder cover down all the
way and pull the bit out.
Bit angle (Fig. 9)
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.

OPERATION

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.

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.
Replacing carbon brushes (Fig. 11, 12 & 13)
When the resin insulating tip inside the carbon brush is
exposed to contact the commutator, it will automatically
shut off the motor. When this occurs, both carbon
brushes should be replaced. Keep the carbon brushes
clean and free to slip in the holders. Both carbon brushes
should be replaced at the same time. Use only identical
carbon brushes.
Remove the screws which secure the rear cover. Pry up
the rear cover with a screwdriver and remove it.
Use a screwdriver to remove the brush holder caps. Take
out the worn carbon brushes, insert the new ones and
secure the brush holder caps.
5