Operation; Maintenance; Optional Accessories; Replacing Carbon Brushes - Makita HM1202 Instruction Manual

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

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. (Fig. 11)
Remove the screws which secure the rear cover. Pry up
the rear cover with a screwdriver and remove it. (Fig. 12)
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. (Fig. 13)
Lubrication
This tool requires no hourly or daily lubrication because it
has a grease-packed lubrication system. It should be
relubricated after every 6 months of operation. Send the
complete tool to Makita Authorized or Factory Service
Center for this lubrication service. However, if
circumstances require that you should lubricate it by
yourself, proceed as follows.
Run the tool for several minutes to warm it up. Switch off
and unplug the tool.
Loosen the six screws and remove the handle. (Fig. 14)
Remove the crank cap using a socket wrench. Rest the
tool on the table with the bit end pointing upwards. This
will allow the old grease to collect inside the crank
housing. (Fig. 15)
Wipe out the old grease inside and replace with a fresh
grease (30 g; 1 oz). Use only Makita genuine hammer
grease (optional accessory). Filling with more than the
specified amount of grease (approx. 30 g; 1 oz) can cause
faulty hammering action or tool failure. Fill only with the
specified amount of grease. (Fig. 16)
Reinstall the crank cap and tighten with the socket
wrench.
CAUTION:
• Do not tighten the crank cap excessively. It is made of
resin and is subject to breakage.
• Be careful not to damage the terminals or lead wires
especially when wiping out the old grease or installing
the handle.
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be
performed by Makita Authorized Service Centers, always
using Makita replacement parts.

OPTIONAL ACCESSORIES

CAUTION:
• These accessories or attachments are recommended
for use with your Makita tool specified in this manual.
The use of any other accessories or attachments might
present a risk of injury to persons. Only use accessory
or attachment for its stated purpose.
If you need any assistance for more details regarding
these accessories, ask your local Makita Service Center.
• Bull point (SDS-max)
• Cold chisel (SDS-max)
• Scaling chisel (SDS-max)
• Clay spade (SDS-max)
• Bit grease
• Safety goggles
• Hammer grease
• Plastic carrying case
NOTE:
• Some items in the list may be included in the tool
package as standard accessories. They may differ from
country to country.
7