Makita HR4003C User Manual download pdf (Page 5)

Hammering only

Fig.3

For chipping, scaling or demolition operations, depress

the lock button and rotate the change lever so that the

pointer points to the

symbol. Use a bull point, cold

chisel, scaling chisel, etc.

CAUTION:

• Do not rotate the change lever when the tool is

running under load. The tool will be damaged.

• To avoid rapid wear on the mode change

mechanism, be sure that the change lever is

always positively located in one of the two or three

action mode positions.

Torque limiter

The torque limiter will actuate when a certain torque

level is reached. The motor will disengage from the

output shaft. When this happens, the bit will stop turning.

CAUTION:

• As soon as the torque limiter actuates, switch off

the tool immediately. This will help prevent

premature wear of the tool.

ASSEMBLY

CAUTION:

• Always be sure that the tool is switched off and

unplugged before carrying out any work on the

tool.

Side handle (accessory)

Fig.4

CAUTION:

• Use the side handle only when chipping, scaling or

demolishing. Do not use it when drilling in concrete,

masonry, etc. The tool cannot be held properly with

this side handle when drilling.

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.

Fig.5

Side grip

Fig.6

CAUTION:

• Always use the side grip to ensure operating safety

when drilling in concrete, masonry, etc.

The side grip swings around to either side, allowing easy

handling of the tool in any position. Loosen the side grip

by turning it counterclockwise, swing it to the desired

position and then tighten it by turning clockwise.

Bit grease (optional accessory)

Coat the bit shank head beforehand with a small amount

of bit grease (about 0.5 -1 g; 0.02 - 0.04 oz.). This chuck

lubrication assures smooth action and longer service

life.

Installing or removing the bit

Fig.7

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.

Fig.8

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.9

Bit angle (when chipping, scaling or

demolishing)

Fig.10

The bit can be secured at 12 different angles. To change

the bit angle, depress the lock button and rotate the

change lever so that the pointer points to the

symbol.

Turn the bit to the desired angle.

Depress the lock button and rotate the change lever so

that the pointer points to the

symbol. Then make sure

that the bit is securely held in place by turning it slightly.

Fig.11

Depth gauge

Fig.12

The depth gauge is convenient for drilling holes of

uniform depth. Insert the depth gauge into the hole in the

grip base. Adjust the depth gauge to the desired depth

and then tighten the clamp screw to secure the depth

gauge.

The depth gauge is convenient for drilling holes of

uniform depth. Loosen the clamp screw and adjust the

depth gauge to the desired depth. After adjusting,

tighten the clamp screw firmly.

NOTE:

• The depth gauge cannot be used at the position

where the depth gauge strikes against the tool

body.

• The depth gauge cannot be used at the position

where the depth gauge strikes against the gear

housing/motor housing.

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Makita HR4003C User Manual Page 5

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