makita GA5020 Cordless Angle Grinder Instruction Manual

makita GA5020 Cordless Angle Grinder

Explanation of general view

1. Shaft lock
2. Lock button / Lock-off button
3. Switch trigger (type A)
4. Lock lever
5. Switch trigger (type B)
6. Indication lamp
7. Protrusion of loop handle
8. Matching hole in the gear housing
9. Loop handle
10. Hex wrench
11. Bolt
12. Loop handle
13. Hex wrench
14. Bolt
15. Wheel guard
16. Screw
17. Bearing box
18. Bearing box
19. Wheel guard
20. Screw
21. Lever
22. Screw
23. Lock nut
24. Depressed center grinding wheel/Multi-disc
25. Inner flange
26. Lock nut wrench
27. Shaft lock
28. Lock nut
29. Abrasive cut-off wheel
30. Inner flange
31. Wheel guard for cut-off wheel
32. Exhaust vent
33. Inhalation vent
34. Limit mark
35. Brush holder cap
36. Screwdriver

SPECIFICATIONS

Model

|

GA5020

|

GA5021

| GA5020C / GA5021C|

GA6020

|

GA6021

| GA6020C / GA6021C
---|---|---|---|---|---|---
Depressed center wheel diameter| 125 mm| 125 mm| 125 mm| 150 mm| 150 mm| 150 mm
Spindle thread| M14| M14| M14| M14| M14| M14
No load speed (no) / Rated speed (n)| 11,000(min–1)| 11,000(min–1)| 10,000(min–1)| 10,000(min–1)| 10,000(min–1)| 9,000(min–1)
Overall length| 356 mm| 384 mm| 390 mm| 356 mm| 384 mm| 390 mm
Net weight| 2.2 kg| 2.3 kg| 2.5 kg| 2.2 kg| 2.3 kg| 2.5 kg
Safety class| /II

• Due to our continuing program of research and development, the specifications herein are subject to change without notice.
• Note: Specifications may differ from country to country.

Intended use
The tool is intended for grinding, sanding, and cutting metal and stone materials without the use of water.

Power supply
The tool should be connected only to a power supply of the same voltage as indicated on the nameplate, and can only be operated on a single-phase AC supply. They are double-insulated in accordance with European Standards and can, therefore, also be used from sockets without earth wire.

For Model GA5020
ENG102-1

For European countries only

Noise
The typical A-weighted noise level determined according to EN60745-2-3:

• Sound pressure level (LpA) : 89 dB(A)
• Sound power level (LWA) : 100 dB(A)
• Uncertainty (K) : 3 dB(A)

Wear ear protection

Vibration
The vibration total value (tri-axial vector sum) determined according to EN60745-2-3:

• Work mode: surface grinding
• Vibration emission (ah,AG): 9 m/s2
• Uncertainty (K): 1.5 m/s2

Cutting-off or wire brushing may have different vibration emission values.

For Model GA5021
ENG102-1

For European countries only

Noise
The typical A-weighted noise level determined according to EN60745-2-3:

• Sound pressure level (LpA): 90 dB(A)
• Sound power level (LWA): 101 dB(A)
• Uncertainty (K): 3 dB(A)

Wear ear protection

Vibration
The vibration total value (tri-axial vector sum) determined according to EN60745-2-3:

• Work mode: surface grinding
• Vibration emission (ah,AG) : 13.5 m/s2
• Uncertainty (K) : 1.5 m/s2

Cutting-off or wire brushing may have different vibration emission values.

For Model GA6020
ENG102-1

For European countries only

Noise
The typical A-weighted noise level determined according to EN60745-2-3:

• Sound pressure level (LpA) : 89 dB(A)
• Sound power level (LWA) : 100 dB(A)
• Uncertainty (K) : 3 dB(A)

Wear ear protection

Vibration
The vibration total value (tri-axial vector sum) determined according to EN60745-2-3:

• Work mode: surface grinding
• Vibration emission (ah,AG) : 10 m/s2
• Uncertainty (K) : 1.5 m/s2

Cutting-off or wire brushing may have different vibration emission values.

For Model GA6021
ENG208-2

For European countries only

Noise
The typical A-weighted noise level determined according to EN60745-2-3:

• Sound pressure level (LpA) : 89 dB(A)
• Sound power level (LWA) : 100 dB(A)
• Uncertainty (K) : 3 dB(A)

Wear ear protection

Vibration
The vibration total value (tri-axial vector sum) determined according to EN60745-2-3:

• Work mode: surface grinding
• Vibration emission (ah,AG) : 6.5 m/s2
• Uncertainty (K) : 1.5 m/s2

Cutting-off or wire brushing may have different vibration emission values.

For Model GA5020C
ENG102-1

For European countries only

Noise
The typical A-weighted noise level determined according to EN60745-2-3:

• Sound pressure level (LpA) : 90 dB(A)
• Sound power level (LWA) : 101 dB(A)
• Uncertainty (K) : 3 dB(A)

Wear ear protection
ENG208-2

Vibration
The vibration total value (tri-axial vector sum) determined according to EN60745-2-3:

• Work mode: surface grinding
• Vibration emission (ah,AG) : 9.5 m/s2
• Uncertainty (K) : 1.5 m/s2

Cutting-off or wire brushing may have different vibration emission values.

For Model GA5021C
ENG102-1

For European countries only

Noise
The typical A-weighted noise level determined according to EN60745-2-3:

• Sound pressure level (LpA) : 90 dB(A)
• Sound power level (LWA) : 101 dB(A)
• Uncertainty (K) : 3 dB(A)

Wear ear protection
ENG208-2

Vibration
The vibration total value (tri-axial vector sum) determined according to EN60745-2-3:

• Work mode: surface grinding
• Vibration emission (ah,AG) : 8.5 m/s2
• Uncertainty (K) : 1.5 m/s2

Cutting-off or wire brushing may have different vibration emission values.

For Model GA6020C
ENG102-1

For European countries only

Noise
The typical A-weighted noise level determined according to EN60745-2-3:

• Sound pressure level (LpA) : 91 dB(A)
• Sound power level (LWA) : 102 dB(A)
• Uncertainty (K) : 3 dB(A)

Wear ear protection
ENG208-2

Vibration
The vibration total value (tri-axial vector sum) determined according to EN60745-2-3:

• Work mode: surface grinding
• Vibration emission (ah,AG) : 9.0 m/s2
• Uncertainty (K) : 1.5 m/s2

Cutting-off or wire brushing may have different vibration emission values.

For Model GA6021C
ENG102-1

For European countries only

Noise
The typical A-weighted noise level determined according to EN60745-2-3:

• Sound pressure level (LpA) : 90 dB(A)
• Sound power level (LWA) : 101 dB(A)
• Uncertainty (K) : 3 dB(A)

Wear ear protection
ENG208-2

Vibration
The vibration total value (tri-axial vector sum) determined according to EN60745-2-3:

• Work mode: surface grinding
• Vibration emission (ah,AG): 8.5 m/s2
• Uncertainty (K): 1.5 m/s2

Cutting-off or wire brushing may have different vibration emission values.

EC-DECLARATION OF CONFORMITY

Model; GA5020,GA5020C,GA5021, GA5021C,GA6020,GA6020C,GA6021,GA6021C
We declare under our sole responsibility that this product is in compliance with the following standards of standardized documents;

EN60745, EN55014, EN61000 in accordance with Council Directives, 2004/108/EC, 98/37/EC.

Tomoyasu Kato Director

Responsible Manufacturer:

Makita Corporation
3-11-8, Sumiyoshi-cho, Anjo, Aichi, JAPAN Authorized Representative in Europe:

Makita International Europe Ltd.
Michigan Drive, Tongwell, Milton Keynes, Bucks MK15 8JD, ENGLAND.

SPECIFIC SAFETY RULES

DO NOT let comfort or familiarity with the product (gained from repeated use) replace strict adherence to grinder safety rules. If you use this tool unsafely or incorrectly, you can suffer serious personal injury.

Safety Warnings Common for Grinding, Sanding, Wire Brushing, or Abrasive Cutting-Off Operations:

1. This power tool is intended to function as a grinder, sander, wire brush or cut-off tool. Read all safety warnings, instructions, illustrations and specifications provided with this power tool. Failure to follow all instructions listed below may result in electric shock, fire and/or serious injury.

2. Operations such as polishing are not recommended to be performed with this power tool. Operations for which the power tool was not designed may create a hazard and cause personal injury.

3. Do not use accessories that are not specifically designed and recommended by the tool manufacturer. Just because the accessory can be attached to your power tool, it does not assure safe operation.

4. The rated speed of the accessory must be at least equal to the maximum speed marked on the power tool. Accessories running faster than their rated speed can break and fly apart.

5. The outside diameter and the thickness of your accessory must be within the capacity rating of your power tool. Incorrectly sized accessories cannot be adequately guarded or controlled.

6. The arbor size of wheels, flanges, backing pads or any other accessory must properly fit the spindle of the power tool. Accessories with arbour holes that do not match the mounting hardware of the power tool will run out of balance, vibrate excessively and may cause loss of control.

7. Do not use a damaged accessory. Before each use inspects the accessory such as abrasive wheels for chips and cracks, backing pad for cracks, tear or excess wear, wire brush for loose or cracked wires. If a power tool or accessory is dropped, inspect for damage or install an undamaged accessory. After inspecting and installing an accessory, position yourself and bystanders away from the plane of the rotating accessory and run the power tool at maximum no-load speed for one minute. Damaged accessories will normally break apart during this test time.

8. Wear personal protective equipment. Depending on the application, use face shield, safety goggles or safety glasses. As appropriate, wear a dust mask, hearing protectors, gloves, and a workshop apron capable of stopping small abrasive or workpiece fragments. The eye protection must be capable of stopping flying debris generated by various operations. The dust mask or respirator must be capable of filtrating particles generated by your operation. Prolonged exposure to high-intensity noise may cause hearing loss.

9. Keep bystanders a safe distance away from the work area. Anyone entering the work area must wear personal protective equipment. Fragments of workpieces or of a broken accessory may fly away and cause injury beyond the immediate area of operation.

10. Hold the power tool by insulated gripping surfaces only, when performing an operation where the cutting accessory may contact hidden wiring or its own cord. Cutting accessory contacting a “live” wire may make exposed metal parts of the power tool “live” and shock the operator.

11. Position the cord clear of the spinning accessory. If you lose control, the cord may be cut or snagged and your hand or arm may be pulled into the spinning accessory.

12. Never lay the power tool down until the accessory has come to a complete stop. The spinning accessory may grab the surface and pull the power tool out of your control.

13. Do not run the power tool while carrying it at your side. Accidental contact with the spinning accessory could snag your clothing, pulling the accessory into your body.

14. Regularly clean the power tool’s air vents. The motor’s fan will draw dust inside the housing and excessive accumulation of powdered metal may cause electrical hazards.

15. Do not operate the power tool near flammable materials. Sparks could ignite these materials.

16. Do not use accessories that require liquid coolants. Using water or other liquid coolants may result in electrocution or shock.
    Kickback and Related Warnings
    Kickback is a sudden reaction to a pinched or snagged rotating wheel, backing pad, brush or any other accessory. Pinching or snagging causes rapid stalling of the rotating accessory which in turn causes the uncontrolled power tool to be forced in the direction opposite of the accessory’s rotation at the point of the binding.
    For example
    If an abrasive wheel is snagged or pinched by the workpiece, the edge of the wheel that is entering into the pinch point can dig into the surface of the material causing the wheel to climb out or kick out. The wheel may either jump toward or away from the operator, depending on the direction of the wheel’s movement at the point of pinching. Abrasive wheels may also break under these conditions.
    Kickback is the result of power tool misuse and/or incorrect operating procedures or conditions and can be avoided by taking proper precautions as given below.

    • Maintain a firm grip on the power tool and position your body and arm to allow you to resist kickback forces. Always use an auxiliary handle, if provided, for maximum control over kickback or torque reaction during start-up. The operator can control torque reactions or kickback forces if proper precautions are taken.

    • Never place your hand near the rotating accessory. The accessory may kickback over your hand.

    • Do not position your body in the area where the power tool will move if kickback occurs. Kickback will propel the tool in a direction opposite to the wheel’s movement at the point of snagging.

    • Use special care when working corners, sharp edges etc. Avoid bouncing and snagging the accessory. Corners, sharp edges or bouncing have a tendency to snag the rotating accessory and cause loss of control or kickback.

    • Do not attach a saw chain woodcarving blade or toothed saw blade. Such blades create frequent kickbacks and loss of control
      Safety Warnings Specific for Grinding and Abrasive Cutting-Off Operations:

    • Use only wheel types that are recommended for your power tool and the specific guard designed for the selected wheel. Wheels for which the power tool was not designed cannot be adequately guarded and are unsafe.

    • The guard must be securely attached to the power tool and positioned for maximum safety, so the least amount of wheel is exposed to the operator. The guard helps to protect the operator from broken wheel fragments and accidental contact with the wheel.

    • Wheels must be used only for recommended applications. For example: do not grind with the side of cut-off wheel. Abrasive cut-off wheels are intended for peripheral grinding, side forces applied to these wheels may cause them to shatter.

    • Always use undamaged wheel flanges that are of the correct size and shape for your selected wheel. Proper wheel flanges support the wheel thus reducing the possibility of wheel breakage. Flanges for cut-off wheels may be different from grinding wheel flanges.

    • Do not use worn-down wheels from larger power tools. The wheel intended for a larger power tool is not suitable for the higher speed of a smaller tool and may burst.
      Additional Safety Warnings Specific for Abrasive Cutting-Off Operations:

    • Do not “jam” the cut-off wheel or apply excessive pressure. Do not attempt to make an excessive depth of cut. Overstressing the wheel increases the loading and susceptibility to twisting or binding of the wheel in the cut and the possibility of kickback or wheel breakage.

    • Do not position your body in line with and behind the rotating wheel. When the wheel, at the point of operation, is moving away from your body, the possible kickback may propel the spinning wheel and the power tool directly at you.

    • When wheel is binding or when interrupting a cut for any reason, switch off the power tool and hold the power tool motionless until the wheel comes to a complete stop. Never attempt to remove the cut-off wheel from the cut while the wheel is in motion otherwise kickback may occur. Investigate and take corrective action to eliminate the cause of wheel binding

    • Do not restart the cutting operation in the workpiece. Let the wheel reach full speed and carefully reenter the cut. The wheel may bind, walk up or kick back if the power tool is restarted in the workpiece.

    • Support panels or any oversized workpiece to minimize the risk of wheel pinching and kickback. Large workpieces tend to sag under their own weight. Supports must be placed under the workpiece near the line of cut and near the edge of the workpiece on both sides of the wheel.

    • Use extra caution when making a “pocket cut” into existing walls or other blind areas. The protruding wheel may cut gas or water pipes, electrical wiring or objects that can cause kickback.
      Safety Warnings Specific for Sanding Operations:

    • Do not use excessively oversized sanding disc paper. Follow the manufacturer’s recommendations, when selecting sanding paper. Larger sanding paper extending beyond the sanding pad presents a laceration hazard and may cause snagging, tearing of the disc or kickback.
      Safety Warnings Specific for Wire Brushing Operations:

    • Be aware that wire bristles are thrown by the brush even during ordinary operation. Do not overstress the wires by applying excessive load to the brush. The wire bristles can easily penetrate light clothing and/or skin.

    • If the use of a guard is recommended for wire brushing, do not allow interference of the wire wheel or brush with the guard. Wire wheel or brush may expand in diameter due to workload and centrifugal forces.
      Additional safety warnings:

17. When using depressed center grinding wheels, be sure to use only fiberglass-reinforced wheels.

18. 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.

19. Make sure the wheel is not contacting the workpiece before the switch is turned on.

20. 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.

21. Use the specified surface of the wheel to perform the grinding.

22. Watch out for flying sparks. Hold the tool so that sparks fly away from you and other persons or flammable materials.

23. Do not leave the tool running. Operate the tool only when hand-held.

24. Do not touch the workpiece immediately after the operation; it may be extremely hot and could burn your skin.

25. Always be sure that the tool is switched off and unplugged or that the battery cartridge is removed before carrying out any work on the tool.

26. Observe the instructions of the manufacturer for the correct mounting and use of wheels. Handle and store wheels with care.

27. Do not use separate reducing bushings or adaptors to adapt large-hole abrasive wheels.

28. Use only the flanges specified for this tool.

29. For tools intended to be fitted with threaded hole wheels, ensure that the thread in the wheel is long enough to accept the spindle length.

30. Check that the workpiece is properly supported.

31. Watch out for flying sparks. Hold the tool so that sparks fly away from you and other persons or flammable materials.

32. Pay attention that the wheel continues to rotate after the tool is switched off.

33. If the working place is extremely hot and humid, or badly polluted by conductive dust, use a short-circuit breaker (30 mA) to assure operator safety.

34. Do not use the tool on any materials containing asbestos.

35. Do not use water or grinding lubricant.

36. Ensure that ventilation openings are kept clear when working in dusty conditions. If it should become necessary to clear dust, first disconnect the tool from the mains supply ( use nonmetallic objects ) and avoid damaging internal parts.

37. When using a cut-off wheel, always work with the dust-collecting wheel guard required by domestic regulations.

38. Cutting discs must not be subjected to any lateral pressure.

WARNING:
MISUSE or failure to follow the safety rules stated in this instruction manual may cause serious personal injury.
SAVE THESE INSTRUCTIONS.

FUNCTIONAL DESCRIPTION

CAUTION:

• Always be sure that the tool is switched off and unplugged before adjusting or checking the function of the tool.

Shaft lock Fig.1

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.

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.

For tool with a type A switch trigger Fig.2

For tools without a lock button and lock-off button
To start the tool, simply pull the switch trigger. Release the switch trigger to stop.

For a tool with a lock button
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.

For a tool with a lock-off button
To prevent the switch trigger from being accidentally pulled, a lock-off button is provided. To start the tool, depress the lock-off button and pull the switch trigger. Release the switch trigger to stop.

For tool with a type B switch trigger Fig.3

For tools with the lock-on switch
To start the tool, simply pull the switch trigger (A). Release the switch trigger to stop. For continuous operation, pull the switch trigger (A) and then push in the lock lever (B). To stop the tool from the locked position, pull the switch trigger (A) fully, then release it.

For tools with the lock-off switch
To prevent the switch trigger from being accidentally pulled, a lock lever is provided. To start the tool, push in the lock lever (B) and then pull the switch trigger (A). Release the switch trigger to stop.

For tools with the lock-on and lock-off switch
To prevent the switch trigger from being accidentally pulled, a lock lever is provided. To start the tool, push in the lock lever (B) and then pull the switch trigger (A). Release the switch trigger to stop. For continuous operation, push in the lock lever (B), pull the switch trigger and then push the lock lever further in (B). To stop the tool from the locked position, pull the switch trigger (A) fully, then release it.

Electronic function

Constant speed control (For models GA5020C,GA5021C,GA6020C,GA6021C)

• Possible to get a fine finish because the rotating speed is kept constant even under the loaded condition.
• Additionally, when the load on the tool exceeds admissible levels, power to the motor is reduced to protect the motor from overheating. When the load returns to admissible levels, the tool will operate as normal.

Soft start feature

• Soft start because of suppressed starting shock.

Indication lamp Fig.4
The indication lamp lights up green when the tool is plugged in. If the indicator lamp does not light up, the mains cord or the controller may be defective. The indication lamp is lit but the tool does not start even if the tool is switched on, the carbon brushes may be worn out, or the controller, the motor, or the ON/OFF switch may be defective.

Unintentional restart proof
Even the locking lever keeping the switch trigger depressed (Lock-on position) does not allow the tool to restart even when the tool is plugged. At this time, the indication lamp flickers red and shows the unintentional restart- proof device is functional. To cancel the unintentional restart proof, 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.

Installing side grip (handle)

CAUTION:

• Always be sure that the side grip is installed securely before operation. Fig.5

Screw the side grip securely on the position of the tool as shown in the figure.

Installing loop handle (Accessory)

CAUTION:
Always be sure that the loop handle is installed securely before operation. Fig.6

Always install the loop handle on the tool before operation. Hold the tool’s switch handle and the loop handle firmly with both hands during operation. Install the loop handle so that its protrusion will fit into the matching hole in the gear housing. Install the bolts and tighten them with the hex wrench. The loop handle can be installed in two different directions as shown in the figures whichever is convenient for your work. Fig.7/Fig.8

Installing or removing wheel guard

CAUTION:

• When using a depressed center grinding wheel/Multi-disc, wire wheel brush or cut-off wheel, the wheel guard must be fitted on the tool so that the closed side of the guard always points toward the operator.

For tools with locking screw-type wheel guard Fig.9 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 around 180 degrees counterclockwise. Be sure to tighten the screw securely. To remove the wheel guard, follow the installation procedure in reverse.

For tools with clamp lever type wheel guard Fig.10/Fig.11

Loosen the lever on the wheel guard after loosening the screw. 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 around to the position shown in the figure. Tighten the lever to fasten the wheel guard. If the lever is too tight or too loose to fasten the wheel guard, loosen or tighten the screw to adjust the tightening of the wheel guard band.

To remove the wheel guard, follow the installation procedure in reverse.

Installing or removing the depressed center grinding wheel/Multi-disc (accessory)

WARNING:
Always use supplied guard when the depressed center grinding wheel/Multi- disc is on the tool. The wheel can shatter during use and the guard helps to reduce the chances of personal injury. Fig.12 Mount the inner flange onto the spindle. Fit the wheel/disc on the inner flange and screw the lock nut onto the spindle.
To tighten the lock nut, press the shaft lock firmly so that the spindle cannot revolve, then use the lock nut wrench and securely tighten clockwise. Fig.13

To remove the wheel, follow the installation procedure in reverse.

OPERATION

WARNING:

• It should never be necessary to force the tool. The weight of the tool applies adequate pressure. Forcing and excessive pressure could cause dangerous wheel breakage.
• ALWAYS replace the wheel if the tool is dropped while grinding.
• NEVER bang or hit the grinding disc or wheel onto work.
• Avoid bouncing and snagging the wheel, especially when working corners, sharp edges, etc. This can cause loss of control and kickback.
• NEVER use tools with wood cutting blades and other sawblades. Such blades when used on a grinder frequently kick and cause loss of control leading to personal injury.

CAUTION:
After the operation, always switch off the tool and wait until the wheel has come to a complete stop before putting the tool down.

Grinding and sanding operation Fig.14

ALWAYS hold the tool firmly with one hand on the rear handle and the other on the side handle. Turn the tool on and then apply the wheel or disc to the workpiece.
In general, keep the edge of the wheel or disc at an angle of about 15 degrees to the workpiece surface. During the break-in period with a new wheel, do not work the grinder in the B direction or it will cut into the workpiece. Once the edge of the wheel has been rounded off by use, the wheel may be worked in both A and B directions.

Operation with an abrasive cut-off wheel (accessory) Fig.15

WARNING:

• When using an abrasive cut-off wheel, be sure to use only the special wheel guard designed for use with cut-off wheels.
• NEVER use the cut-off wheel for side grinding.
• Do not “jam” the wheel or apply excessive pressure. Do not attempt to make an excessive depth of cut. Overstressing the wheel increases the loading and susceptibility to twisting or binding of the wheel in the cut and the possibility of kickback, wheel breakage, and overheating of the motor may occur.
• Do not start the cutting operation in the workpiece. Let the wheel reach full speed and carefully enter into the cut moving the tool forward over the workpiece surface. The wheel may bind, walk up or kick back if the power tool is started in the workpiece.
• During cutting operations, never change the angle of the wheel. Placing side pressure on the cut-off wheel (as in grinding) will cause the wheel to crack and break, causing serious personal injury.

MAINTENANCE

CAUTION:
Always be sure that the tool is switched off and unplugged before attempting to perform an inspection or maintenance.

The tool and its air vents have to be kept clean. Regularly clean the tool’s air vents or whenever the vents start to become obstructed. Fig.16

Replacing carbon brushes Fig.17
Remove and check the carbon brushes regularly. Replace them when they wear down to the limit mark. 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 brush holder caps. Take out the worn carbon brushes, insert the new ones and secure the brush holder caps. Fig.18

After replacing the brushes, plug in the tool and break in the brushes by running the tool with no load for about 10 minutes. Then check the tool while running and the electric brake operation when releasing the switch trigger. If the electric brake is not working well, ask your local Makita service center for repair. (For models GA5020/GA6020) 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.

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.
• Your tool is supplied with a guard for use with a depressed center grinding wheel, multi-disc, and wire wheel brush. A cut-off wheel can also be used with an optional guard. If you decide to use your Makita grinder with approved accessories that you purchase from your Makita distributor or service center, be sure to obtain and use all necessary fasteners and guards as recommended in this manual. Your failure to do so could result in personal injury to you and others.

If you need any assistance for more details regarding these accessories, ask your local Makita Service Center.

• Wheel guard (Wheel cover)
• Inner flange
• Depressed center wheels
• Lock nut (For depressed center wheel)
• Rubber pad
• Abrasive discs
• Lock nut (For abrasive disc)
• Lock nut wrench
• Wire cup brush
• Side grip
• Loop handle
• Dust cover

Makita Corporation Anjo, Aichi, Japan

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