Manual Makita MT904 (page 6 of 56) (English, German, Dutch, Danish, French, Italian, Portuguese, Turkish, Spanish)

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Additional Safety Warnings:

17. When using depressed centre grinding wheels, be

sure to use only fiberglass-reinforced wheels.

18. NEVER USE Stone Cup type wheels with this

grinder. This grinder is not designed for these types

of wheels and the use of such a product may result in

serious personal injury.

19. Be careful not to damage the spindle, the flange

(especially the installing surface) or the lock nut.

Damage to these parts could result in wheel

breakage.

20. Make sure the wheel is not contacting the

workpiece before the switch is turned on.

21. Before using the tool on an actual workpiece, let it

run for a while. Watch for vibration or wobbling

that could indicate poor installation or a poorly

balanced wheel.

22. Use the specified surface of the wheel to perform

the grinding.

23. Do not leave the tool running. Operate the tool

only when hand-held.

24. Do not touch the workpiece immediately after

operation; it may be extremely hot and could burn

your skin.

25. Observe the instructions of the manufacturer for

correct mounting and use of wheels. Handle and

store wheels with care.

26. Do not use separate reducing bushings or

adaptors to adapt large hole abrasive wheels.

27. Use only flanges specified for this tool.

28. For tools intended to be fitted with threaded hole

wheel, ensure that the thread in the wheel is long

enough to accept the spindle length.

29. Check that the workpiece is properly supported.

30. Pay attention that the wheel continues to rotate

after the tool is switched off.

31. If working place is extremely hot and humid, or

badly polluted by conductive dust, use a short-

circuit breaker (30 mA) to assure operator safety.

32. Do not use the tool on any materials containing

asbestos.

SAVE THESE INSTRUCTIONS.

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.

Shaft lock

CAUTION:

• Never actuate the shaft lock when the spindle is

moving. The tool may be damaged.

Press the shaft lock to prevent spindle rotation when

installing or removing accessories. (Fig. 1)

Switch action

CAUTION:

• Before plugging in the tool, always check to see that

the switch trigger actuates properly and returns to the

“OFF” position when released. (Fig. 2)

For tool without lock button

To start the tool, simply pull the switch trigger. Release

the switch trigger to stop.

For tool with lock button

CAUTION:

• Switch can be locked in “ON” position for ease of

operator comfort during extended use. Apply caution

when locking tool in “ON” position and maintain firm

grasp on tool.

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, and then release it.

ASSEMBLY

CAUTION:

• Always be sure that the tool is switched off and

unplugged before carrying out any work on the tool.

Installing side grip (handle)

CAUTION:

• Always be sure that the side grip is installed securely

before operation.

Screw the side grip securely on the position of the tool as

shown in the figure. (Fig. 3)

Installing or removing wheel guard (For

depressed center wheel/Multi disc)

CAUTION:

• When using a depressed center grinding wheel/Multi-

disc, the wheel guard must be fitted on the tool so that

the closed side of the guard always points toward the

operator.

Mount the wheel guard with the protrusion on the wheel

guard band aligned with the notch on the bearing box.

Then rotate the wheel guard to such an angle that it can

protect the operator according to work. Be sure to tighten

the screw securely. (Fig. 4)

To remove wheel guard, follow the installation procedure

in reverse.

Installing or removing depressed center

grinding wheel/Multi-disc (optional

accessory)

WARNING:

• Always use supplied guard when depressed center

grinding wheel/Multi-disc is on tool. Wheel can shatter

during use and guard helps to reduce chances of

personal injury.

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Makita MT904 Manual

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