Repair manual for Makita

The famous Japanese brand Makita enjoys well-deservedpopular with consumers around the world. All products of the Makita brand stand out for high quality, ergonomics, affordable prices. A competent Russian consumer tries to squeeze more out of the instrument than he can give. Makita's ears have their ultimate strength.

Repair of the Bulgarian Makita with its own hands is not particularly difficult and can be performed both in the service center and independently, as you can freely purchase the necessary spare parts. Malfunctions of the Bulgarian and ways to eliminate them are discussed in detail in the attached instructions.

Features of the construction of the bulgari Makita

The bulgarian is an angle grinder, which was named only in the expanses of the former USSR.Structurally, any angle grinder( USM) is the same.

The principle of the Bulgarians Makita is based on the transformation of electrical energy into a mechanical one. This leads to the rotation of the shaft, on which the disc is installed for cutting, grinding, polishing. And the angular machine is called for the reason that in the used gearbox the torque is transmitted at an angle of 90 degrees.

Because the cooling of the motor in the Makita grills is provided by sucking in external air through the ventilation holes, the working parts of the Makita Bulgarians are covered with a special protective powder coating, which prevents the dust from settling. Structurally in the Bulgars of Makita, a labyrinth seal system is provided and the "Start" button is sealed.

But each firm to introduce a customer introduces its raisins into the design. Not deprived of this and the Bulgarian Makita. Bulgarians Makita conditionally divided into powerful and small.

Makita bulbs are marked according to the power of the electric motor.

The design features of the Makita angle grinders include:

• The presence of a labyrinth device protecting the bearings from dirt and dust;
• The windings of the electric motor in bulbs of high power are protected by armored coating;
• Makita angle grinders are equipped with a special system, which protects the tool from jerks during start-up, called Super-Joint-System.

A few words about the SJS system. The system prevents back impact, excludes jerking and jamming of the working element, protects the motor from overloads.

The system uses a spring, the purpose of which is to transfer forces from the rotor to the gears of the reducer. The spring acts as a buffer, prevents jerking when starting and stopping. This design significantly reduces vibration and ensures smooth operation of the Makita

. Makiki Bulgarians are divided into classes according to the width of the working disk. Bulgarians are conventionally divided into three classes: light, medium, heavy. In turn, each class is divided into Bulgarian for professionals and for domestic needs. The professional models of the Bulgarians Makita have an increased power reserve, an integrated security system, and an increased work resource. Professional Bulgarians perfectly withstand heavy loads for a long time.

Makita household angle grinders have high performance, but very affordable prices. Bulgarians of the Makita can use a disc with a maximum diameter of 230 mm.

Depending on the diameter of the disk, the Makita is divided into classes:

• The diameter of 115-125 mm characterizes the light class. Easily held with one hand by the body, which acts as a handle. But professional Bulgarians of this class can be equipped with a back handle, in which the button for turning on the tool is built-in;
• The diameter of 150-180 mm relates the bulgarian Makita to the middle class. This category includes professional and amateur models equipped with electric motors of various capacities. Modern models have a rotary rear handle;
• Diameter of 230 mm characterizes Bulgarians of heavy class. In this class, Bulgarians Makita are produced exclusively for professionals. These machines are designed for work on concrete, stones, bricks, etc. In their design, all modern systems of consumer protection from injuries are laid.

Models of the Makita Bulgarians are available for discs with diameters of 115 mm, 125 mm, 150 mm, 180 mm and 230 m.

In Bulgarian high power, carbon brushes are replaced without removing the stator housing cover.

Bulgarians Makita of different power differ in appearance. Professional Bulgarians with a power of over 1000 W have a large body and a comfortable rear handle. The handle is equipped with protective black-colored antivibration pads. Bulgarians with a power of up to 1000 W have a convenient housing, which acts as a handle.

The Makita Bulgarians have a quick-release casing. This design allows you to quickly remove the protective cover.

Repair tool

Self-repair of Makita angle grinders requires the use of a specific tool. Do not do without a set of screwdrivers. Preferably, they are equipped with a ratchet. The best option is to use a cordless screwdriver. To repair the electrical part of Bolgarki Makita, you will need a tester, a device for determining short-circuited turns of IR-2.And also prepare a car key, bearing pullers, a hammer, a soft metal tip. Well, you can not do without the necessary grease , cleaning materials, liquids for washing old grease.

To start repairing ushms with our own hands, we need to prepare the workplace, install the correct lighting. You will need a diagram of the angle grinder of the desired model and the proposed instruction.

Any faults in power tools are divided into two types: electrical and mechanical.

We will consider the repair of the Makita boltark units using the Makita 9565 scheme.

Possible electrical faults

Electrical faults of the Makita grinder can be divided into control circuit faults, rotor breakage and stator malfunction.

How to troubleshoot the control circuit of the Makita

If your BulgarianMakita does not turn on, the biggest cause may be a breakdown in the power and control circuits.

To get to the components of the control circuits, it is necessary to remove the back cover of the case pos.38 by unscrewing the self-tapping screw 4 × 18 pos.39.The switch ST115-40 K9565 pos.28 is fixed in the switch holder pos.27.The switch holder is closed with a cover, pos. 29, which is fixed to the motor casing pos.33.

The power cable pos. 37 is connected to the switch. Using a tester, check the integrity of the circuits from the plug to the terminals of the switch. The switch pos. 28 is controlled by the lever pos.30.From the switch contacts, check the chain before the carbon brushes pos.

In the control circuits, the weakest link is the carbon brushes. In the Bulgarian Makita 9565 carbon brushes CB-318 with are used for auto-shutdown, so check the brushes.

In professional Bulgarians regulators of turns are established. In the makita Bulgarians with a capacity of more than 1000 W there is a soft start system. This system is equipped with a ushma Makita 9077SF.

If the breaker fails, the fault is eliminated by completely replacing it. If the power supply wire breaks or breaks, the fault is eliminated by replacing the whole wire or by removing the damaged parts.

The process of switching on is carried out using the lever pos.30.If you disassemble the housing of the Bulgarian for repair or maintenance, lubricate the grooves of the lever with silicone grease before assembly.

Checking the electric motor

In addition to the control circuits, the rotor and the stator enter the electrical circuit of the grinder. These are complex nodes, repair of which is recommended to be performed in specialized centers. But for Russian craftsmen there is nothing inaccessible. We recommend our own ways of repairing the stator or rotor with our own hands.

How to repair the stator bulgarka Makita

At the failure of the stator pos.24 bolgarki indicates the appearance of the smell of burning, the overheating of the case of the Bulgarian, a spontaneous set of revolutions of the Bulgarian. In the case of the Bulgarian, pos.33, the stator is fixed with four self-cutting screws 4 × 70 pos.21.To prevent damage, the stator is closed by the protection pos. 20.

Repair of the stator of the Bulgarian Makita is to determine the short circuit or breakage of the windings. It is best to perform stator diagnostics with a special device called IR-2.The stator is considered faulty if traces of the darkening of the winding are visible, an open or shorted winding turns are detected.

The stator is simply repaired. It is necessary to rewind its windings.

How to repair the rotor of the bulgarka Makita

When the bulgaria overheats, the smell of burning burns, the arcing in the area of ​​the collector increases, it is necessary to pay attention to the integrity of the rotor pos.13.

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The dismantling of the rotor is associated with the implementation of a consistent disassembly. To remove the rotor, it must be released from the gearbox pos.3.To do this, unscrew the hexagon nut M6 pos.4.To unscrew the nut, one must grip the rotor with one hand. With the second hand, using a car key, unscrew the nut counterclockwise.

Remove the nut, pull out the flat washer pos. 5, remove the conical spiral pinion pos. 6, remove the locking spring pos.7.Shaking the rotor in the sides carefully pull it out of the gearbox pos.3.Having removed a lock ring pos.8, use a puller to pull out the bearing pos.9.

In the Bulgarian Makita 9565 bearing 6001LLB is used.

It remains to remove the flat washer pos. 10 and the gearbox cover pos.

The appearance of the rotor of the bulgarket Makita 9565 with the insulating washer pos.14, the flat washer 7 pos.15, the bearing pos.16 and the rubber anther 22 pos.17.In the Bulgarian, the collector uses a 627zz bearing. Russian analogue 80027.

Repair of the rotor is to replace it with a new one or a repaired one. You can repair the rotor yourself, but you need not only patience, equipment, material. This is a kind of work of high class.

Mechanical damages

In addition to the electrical part, a mechanical part is included in the bulgark, the main part of which is the reducer.

How to repair the

grinder Reducer consists of a body, a leading and driven gears. The driving gear is put on the rotor shaft. The driven gear is fixed to the spindle pos.50.

On the Bulgarian Makita 9565, the driven gear is pressed onto the spindle. And in the Makita 9558HN model, the driven gear is attached to the shaft with a keyway.

The gearbox malfunctions are associated with the failure of the gear teeth. The gears slip or the part of the teeth splits.

Repair of the Makita bolt reducer is to replace a pair of helical gears. Replacement gears are made only in pairs.

To remove the driven gear, you can not do without a press or a special puller. Do not use a hammer, because the gearbox body is made of a brittle material.

Assembling the bulgaria Makita 9565

Before assembling the Makita bulb, check the integrity of all parts and their cleanliness. The assembly is started from the installation on the bearing spindle and the driven gear.

Assembling the spindle

The spindle item 50 is put on the spindle pos.51, the cover of the body pos.53, the bearing housing pos.54.Insert the pre-lubricated bearing 6201LLB into the bearing housing. Press the driven gear pos.on the spindle. The spindle is assembled.

Installing the rotor in the gearbox housing

You must insert the repaired or new rotor with the bearings in the gearbox housing, put on the parts, attach the drive gear and fix the nut.

During the installation of the rotor in the gearbox housing, check the pressing of the bearing. The correctly installed rotor is easily rotated in the gear housing.

Installing the rotor in the stator housing

The assembled reducer with the rotor is inserted into the stator housing, on which the bearing is pressed on the collector side, closed with a protective rubber dust guard, and the ease of scrolling is checked. It remains to install the assembled spindle in the gear housing.

Assemble the assembled spindle into the gearbox housing pos.3, pre-laying the rubber ring pos.55 and lubricating the bolts pos. 52 sealant.
Service of Makita GA 5030 \ Make Makita 5030

All operations for assembling the mechanical part of the Bulgarian are accompanied by mandatory lubrication of the parts. Pay special attention to the process of applying lubricant to the reducer of the Bulgarian.

It is important not only its quality, but also the quantity. The grease in the volume of 1/3 volume of the reducer is placed in the housing of the reducer of the Bulgarian.

After assembling the mechanical part of the grinder, each time before tightening the fixing screws, check the ease of rotation of the gearbox by turning it over the spindle.

At the final stage, it remains to install carbon brushes, put on the back cover of the case and test the tool.

The Bulgarians Makita 9565 have carbon brushes CB-325.Timely replacement of carbon brushes will not only retain the rotor, but also extend the life of the entire tool.

Typically, carbon brushes change after 7,000 hours of operation or when worn down to 8 mm in length. In ek , in extreme cases, you can use self-made carbon brushes. But at the first opportunity it is necessary to establish relatives.

If your Bulgarian works after assembly without any noise, without jerks, you can be congratulated. The task of repairing the Bulgarian Makita is complete.

A few words about fakes of

On the Russian market of tools often there are forgeries of Bulgarians of Makita company. A popular and well-promoted brand is popular not only among users, but also in various suits of rogues.

Most often, counterfeits are exposed to powerful Bulgarians from Makita. For example, Makita 9069.

When selecting the Makita grinder, pay attention to the following details:

quality of plastic parts cast;

the quality of the additional handle;

low price should alert you;

carefully study the plate, it can find a lot of inaccuracies;

on the Bulgars of Makita must have a serial number;

on the shells of the Bulgarians Makita has a mandatory inscription, which you will not find on fakes;

on the original Makita brushes of the original Makita;

as a rule, screws with a hexagon head are used in the assembly, screws "Philipps" are on falsifications;

winding armature and stator for fakes are covered with artisan varnish.

Being careful when choosing Makita, you will not run into a fake and buy a real tool from Japanese manufacturers.

Good luck to you!

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