Manual Makita HM1304B (page 5 of 32) (English, German, Dutch, Danish, French, Italian, Portuguese, Spanish)

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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. 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.

ASSEMBLY

CAUTION:

• Always be sure that the tool is switched off and

unplugged before carrying out any work on the tool.

Side handle (auxiliary handle) (Fig. 2)

The side handle can be either freely swiveled or secured

at one position for use during tool operation. Just loosen

the nut to swivel the handle freely.

To secure the handle at a fixed position, first loosen the

nut and swing the handle to the desired position for use.

Then tighten the nut firmly. If the set bolt turns together

with the nut when you secure the nut, see that the pro-

jecting portion of the side handle fits into the notch on the

head of the set bolt.

Installing or removing the bit (Fig. 3)

This tool accepts bits either with or without a collar on its

shank.

To install the bit, follow either procedure (1) or (2)

described below.

(1) For bits with a collar (Fig. 4)

Pivot the tool retainer back and slightly downward.

Insert the bit into the tool holder as far as it will go.

To securely retain the bit, return the tool retainer to its

original position.

CAUTION:

• Always assure that the bit is securely retained by

attempting to pull the bit out of the tool holder after

completing the above procedure.

(2) For bits without a collar (Fig. 5)

Pivot the tool retainer back and slightly downward.

With the notched portion of the bit facing the tool retainer

shaft, insert the bit into the tool holder as far as it will go.

Then pivot the tool retainer further downward toward the

barrel to securely retain the bit.

CAUTION:

• Always assure that the bit is securely retained by

attempting to pull the bit out of the tool holder after

completing the above procedure.

• The bit without a collar cannot be retained by the

method shown in Fig. 4.

To remove the bit, follow the installation procedure in

reverse.

OPERATION

Chipping/Scaling/Demolition

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. 6, 7 & 8)

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.

Use a screwdriver to remove the holder cap plates.

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.

Reinstall the holder cap plates firmly.

Lubrication (Fig. 9 & 10)

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 circum-

stances 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.

Remove the crank cap using a hex wrench, then replen-

ish with fresh grease (60 g). Use only Makita genuine

hammer grease (optional accessory). Filling with more

than the specified amount of grease (approx. 60 g) can

cause faulty hammering action or tool failure. Fill only

with the specified amount of grease.

Reinstall the crank cap securely with the hex wrench.

To maintain product SAFETY and RELIABILITY, repairs,

any other maintenance or adjustment should be per-

formed by Makita Authorized Service Centers, always

using Makita replacement parts.

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Makita HM1304B Manual

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