Repair and lubrication of a trimmer gearbox for grass

With frequent, intensive use of motorcycles, the gearbox can start to heat up or make sounds uncharacteristic for its normal operation, for example, rattle. This indicates that the mechanism must be lubricated. If this is not done on time, then more serious problems will arise (for example, gears will be quickly worn out and you will need to replace them), up to jamming. Other breakdowns also arise with the transmission mechanism. Reducer repair and lubrication can be performed independently. For this you just need to familiarize yourself with the features of these work and stock up on some available tools.

The gearbox of a trimmer for grass is a node that transfers the rotational movement of the engine shaft to the knife or fishing line. It is located on the lower end of the motorcycle rod. The gear node is also designed to lower the engine speed of the trimmer for grass.

The mechanism consists depending on the model of the motokos of several gears rotating at a high speed. As a result of this, they heat up due to severe friction. If the lubricant is not enough, or it is not at all, then the process leads to a strong overheating and failure of the parts, and, accordingly, the need to carry out a difficult repair. So that this does not happen, lubricate the gear node in time. Misused gearbox is presented in the photo below.

The reducers of modern trimmers of different models from various manufacturers differ from each other by the design and the size of the seat. It happens:

The most common diameters of round seats are 24, 25.5 and 26 mm.

Motokos is equipped with gearboxes with different types of gears:

  • Conical;
  • Worm;
  • Spiroid;
  • Cylindrical;
  • Planetary;
  • Wave;
  • Combined.

Drive shaft and gearbox are very loaded nodes of a trimmer for grass, which are largely susceptible to wear. Between them, the movement is transmitted due to the adhesion of the teeth of the gears located at different angles to each other. Effective gear works only if there are no mechanical damage. In this case, the mechanism should not overheat, otherwise its jamming may occur.

How to remove

In the next video on the corner grinding of the Interskol model there is a large spindle backlash. The author describes in detail the method of removing the sliding bearing sleeve. Why is a tap with a diameter for cutting threads in the inner sleeve in an electric screwdriver. Further, a tap is performed by a mechanical operation to cut the threads and after meeting it with emphasis on the gearbox body, the sleeve will rise along the cutting part of the tap until the landing opening is completely exit.

The author does not recommend the option of extinguishing parts with a large tightness to produce with pullers in order to maintain their integrity. It is advisable to perform such an operation on press equipment.

disassemble, gearbox, hitachi, grinder, device

Sliding bearing can be easily replaced with a needle bearing. The main thing is to choose it in accordance with the external and internal diameter of the sleeve. The following is described the repair work with an angular grinder, in the design of which a needle bearing is used.

Hitachi angular grinding

Hitachi corner grinder suffer from the failure of switches, coal brushes, and a break in the wires of stator windings. Like all electrical tools, the appearance of the correctness of the electrical part largely depends on the state of coal brushes. In the hitachi grinder, coal brushes with a built.In device are installed, popularly called “shot”. The task of such a device is to prevent the inclusion of Hitachi Bulgarians with a high degree of wear of coal brushes. A weak place in the design of the electric part of the Hitachi Bulgarians is the place of input of the cable of power. In this place, a cliff, a fragment, exposure of the cable most often occurs.

Checking the electric motor

The wrong operation of the corner grinding point indicates several points:

  • Rotation of the working body with jerks;
  • A drop in revolutions and power angular grinder Hitachi;
  • Spontaneous set of revolutions;
  • Strong heating of the stator body;
  • The appearance of significant sparking in the collector area;
  • The appearance of the smell of Gary, smoke.

Angle Grinder Restoration | HITACHI Angle Grinder

The power of power tool power is associated with a cliff or short circuit of the rotor windings.

Rotor repair

Repair of the rotor of the corner grinding grinder Hitachi is no different from the repair of the rotor of any corner grinder. Not every consumer will be able to eliminate this kind of malfunction. To do this, you need to have not only special devices, but also the skills of the winding. It is preferable to send a failed rotor to specialized service centers.

But lovers to get to the bottom of the truth with the algorithm of rewinding of the rotor.

The appearance of the rotor is indicated by the appearance of Gary in the collector area. As a rule, lamellas burn out, a dark plaque appears on the wires of the winding.

  • Remove coal brushes;
  • Remove the lid of the gearbox;
  • Unscrew the nut of the mounting gear;
  • Pull the rotor out of the gearbox;
  • Pull the rotor out of the stator body.

If there is an IK-2 device, then you can, without disassembling the rotor, measure the presence of a short circuit of the turns or the breakdown of the windings.

The disassembly of the failed rotor begins with the dismantling of the anchor of the bearing of the rotor, the impeller. Bearings and impeller are recommended to be removed with special pullers so as not to damage the details. If the collector is damaged and is not subject to restoration, it must also be dismantled using the puller. Pre.Plow the ends of the windings sold to the collector lamella. It remains to remove the burned winding. Having cut off the end of the winding with a hacksaw, calculate the number of turns in several grooves, draw the winding direction, determine the percentage of filling the grooves of the anchor core of the anchor. Using a micrometer, measure the diameter of the wire used. You will need this data if you decide to wind the anchor of the Hitachi corner grind.

For other consumers, we recommend that you get a new rotor in service centers or in online stores.

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Stator repair

The failure of the stator is most often indicated by significant overheating of the corner grinder body and a spontaneous set of revolutions that cannot be regulated. The malfunction can be determined by pulling the stator from the body:

disassemble, gearbox, hitachi, grinder, device

  • Disconnect the gearbox body and the stator case, twisting four screws;
  • Pull the gearbox with a rotor from the stator body;
  • Pull out the plastic protection of the stator;
  • Twist two stator fastening screws and pull it out.

The cutters of the stator are easily determined by the tester. But the inter-seal short circuit is best measured by the IK-2 device or an oscilloscope. Repair of the Hitachi corner grinder stator with your own hands can be performed at home. But you have to have some skills.

The failed stator first understands:

  • Output contacts are released;
  • From one end of the core, the winding with a hacksaw for metal is cut off;
  • The number of wires laid turns is considered, the winding direction, the percentage of filling the grooves;
  • The diameter of the wire used is measured using a micrometer;
  • The core is cleaned from traces of soot, drops of molten copper wire.

The manufacture of the stator is described in detail on the pages of our site. It will not be difficult for those who wish to do this work.

Several useful tips when winding:

  • Use the wire of the diameter that was used in the stature;
  • If the volume of the stator grooves allows, it is preferable to use a larger wire, but do not overdo it with this;
  • Try to tightly lay the turns during winding, controlling the shape of the winding;
  • Thoroughly link the winding with a mounting thread or cord;
  • Be sure to soak the winding of the wound stator with paint or varnish, using alternating voltage through the Latra when impregnating;
  • At the end of the winding, clean the middle of the core of the stator from traces of paint, varnish.

Repair of electrical control circuits of the Hitachi angular grinder

Electric circuits of power tools are a simple design. Perform the task of smooth launching the tool, possible control of speed, turn on and off the tool. The control circuits include a switch, a revolution regulator, an electric motor, coal brushes, a cable and switching elements. Consider the work of the electric part of the Hitachi angular grinder on the example of two models: Hitachi G13SB3 and Hitachi G23SCY.

The electrical circuit of the angular grinder Hitachi G13SB3 Corner grinder 125

Hitachi angular grinder assembly scheme

Cable power poses.52 enters the terminals of poses.53, connected to the switch pos.42. At the entrance to the corner of the corner grinder, the cable is fixed with a clip of poses.55. The swab of interference poses is connected to the switch.46 and wires to coal brushes poses.39. Coal brushes with hitchhiking are used in Hitachi grinders. The size of coal brushes in the angular grinder Hitachi G13SR3 6.5 × 7.5 mm. Coal brushes are installed in the brush holder pos.38. The inclusion of the Hitachi angular grinder occurs due to the movement of the posting button.36.

Hitachi angular grinding

Hitachi corner grinder suffer from the failure of switches, coal brushes, and a break in the wires of stator windings. Like all electrical tools, the appearance of the correctness of the electrical part largely depends on the state of coal brushes. In the hitachi grinder, coal brushes with a built.In device are installed, popularly called “shot”. The task of such a device is to prevent the inclusion of Hitachi Bulgarians with a high degree of wear of coal brushes. A weak place in the design of the electric part of the Hitachi Bulgarians is the place of input of the cable of power. In this place, a cliff, a fragment, exposure of the cable most often occurs.

Checking the electric motor

The wrong operation of the corner grinding point indicates several points:

  • Rotation of the working body with jerks;
  • A drop in revolutions and power angular grinder Hitachi;
  • Spontaneous set of revolutions;
  • Strong heating of the stator body;
  • The appearance of significant sparking in the collector area;
  • The appearance of the smell of Gary, smoke.

The power of power tool power is associated with a cliff or short circuit of the rotor windings.

Rotor repair

Repair of the rotor of the corner grinding grinder Hitachi is no different from the repair of the rotor of any corner grinder. Not every consumer will be able to eliminate this kind of malfunction. To do this, you need to have not only special devices, but also the skills of the winding. It is preferable to send a failed rotor to specialized service centers.

But lovers to get to the bottom of the truth with the algorithm of rewinding of the rotor.

The appearance of the rotor is indicated by the appearance of Gary in the collector area. As a rule, lamellas burn out, a dark plaque appears on the wires of the winding.

  • Remove coal brushes;
  • Remove the lid of the gearbox;
  • Unscrew the nut of the mounting gear;
  • Pull the rotor out of the gearbox;
  • Pull the rotor out of the stator body.

If there is an IK-2 device, then you can, without disassembling the rotor, measure the presence of a short circuit of the turns or the breakdown of the windings.

The disassembly of the failed rotor begins with the dismantling of the anchor of the bearing of the rotor, the impeller. Bearings and impeller are recommended to be removed with special pullers so as not to damage the details. If the collector is damaged and is not subject to restoration, it must also be dismantled using the puller. Pre.Plow the ends of the windings sold to the collector lamella. It remains to remove the burned winding. Having cut off the end of the winding with a hacksaw, calculate the number of turns in several grooves, draw the winding direction, determine the percentage of filling the grooves of the anchor core of the anchor. Using a micrometer, measure the diameter of the wire used. You will need this data if you decide to wind the anchor of the Hitachi corner grind.

For other consumers, we recommend that you get a new rotor in service centers or in online stores.

Stator repair

The failure of the stator is most often indicated by significant overheating of the corner grinder body and a spontaneous set of revolutions that cannot be regulated. The malfunction can be determined by pulling the stator from the body:

  • Disconnect the gearbox body and the stator case, twisting four screws;
  • Pull the gearbox with a rotor from the stator body;
  • Pull out the plastic protection of the stator;
  • Twist two stator fastening screws and pull it out.

The cutters of the stator are easily determined by the tester. But the inter-seal short circuit is best measured by the IK-2 device or an oscilloscope. Repair of the Hitachi corner grinder stator with your own hands can be performed at home. But you have to have some skills.

The failed stator first understands:

  • Output contacts are released;
  • From one end of the core, the winding with a hacksaw for metal is cut off;
  • The number of wires laid turns is considered, the winding direction, the percentage of filling the grooves;
  • The diameter of the wire used is measured using a micrometer;
  • The core is cleaned from traces of soot, drops of molten copper wire.

The manufacture of the stator is described in detail on the pages of our site. It will not be difficult for those who wish to do this work.

See also  How to assemble an electric screwdriver Makita. Screwing bolts instead of teeth

Several useful tips when winding:

  • Use the wire of the diameter that was used in the stature;
  • If the volume of the stator grooves allows, it is preferable to use a larger wire, but do not overdo it with this;
  • Try to tightly lay the turns during winding, controlling the shape of the winding;
  • Thoroughly link the winding with a mounting thread or cord;
  • Be sure to soak the winding of the wound stator with paint or varnish, using alternating voltage through the Latra when impregnating;
  • At the end of the winding, clean the middle of the core of the stator from traces of paint, varnish.

Repair of electrical control circuits of the Hitachi angular grinder

Electric circuits of power tools are a simple design. Perform the task of smooth launching the tool, possible control of speed, turn on and off the tool. The control circuits include a switch, a revolution regulator, an electric motor, coal brushes, a cable and switching elements. Consider the work of the electric part of the Hitachi angular grinder on the example of two models: Hitachi G13SB3 and Hitachi G23SCY.

The electrical circuit of the angular grinder Hitachi G13SB3 Corner grinder 125

Cable power poses.52 enters the terminals of poses.53, connected to the switch pos.42. At the entrance to the corner of the corner grinder, the cable is fixed with a clip of poses.55. The swab of interference poses is connected to the switch.46 and wires to coal brushes poses.39. Coal brushes with hitchhiking are used in Hitachi grinders. The size of coal brushes in the angular grinder Hitachi G13SR3 6.5 × 7.5 mm. Coal brushes are installed in the brush holder pos.38. The inclusion of the Hitachi angular grinder occurs due to the movement of the posting button.36.

The most frequent malfunctions in Hitachi grinders occur when the supply cable is out of order at the entrance site, the wear of the coal brushes poses.39, refusal to operation.42.

How to pull out an anchor

To carry out the repair of the gearbox, it is often required to perform its full disassembly with the release from the rotor. In some types of models of Bulgarians, this is not so easy to do. The following video presented are recommendations on how to use the inertial properties of the rotor for this purpose.

In the first video, the base for work is a locksmith, and in the second of the corresponding in size of the square pipe a small device is made. After a light tapping of the gearbox body on the edge of the vise or pipe, the rotor is released from the gearbox. Which method is better. To choose a user.

We disassemble the electric screwdriver for the first time (the path of the samurai)

If you look at the electric screwdriver in the section, we will see:

  • Revolutionary control regulator;
  • Reverse;
  • The transistor of the revolution regulator attached to the radiator;
  • Electric motor;
  • Gearbox.

How to disassemble an electric screwdriver in general

Consider this process on the example of the Makita electrical screwdriver:

  • Disconnect the body in which the battery is located;
  • We unscrew the screws connecting 2 halves with a cross with a hook;
  • We extract what is in the case of an electric screwdriver;
  • We dismantle the reverse button;
  • Remove the speed switch;
  • Discharging the engine and gearbox.

We disassemble the battery of an electric screwdriver

  • If the case is collapsible, then we simply unscrew the fasteners;
  • In the case of an integral housing, remove the gluing layer, push the mating surfaces with a screw;
  • Separate batteries. Dismantling of the battery of an electric screwdriver is performed.

This video shows another analysis of disassembly:

How to disassemble the cartridge of an electric screwdriver

Among the most mobile and loaded nodes of the electric screwdriver include the cartridge. Naturally, it wears out more often than other details.

How the cartridge is attached

Before disassemble the Makita electric screwdriver, for example, we will determine the method of attaching the cartridge. This assembly node on the tool is fixed with the following methods:

  • Old, tested for 2 centuries. A cone cone cone. The cone of the lower opening of the cartridge and shaft are the same.
  • A method called threaded. The cartridge is screwed onto the threaded part of the end of the shaft.
  • The method of fixing the cartridge using a fixing screw.

We define how the manufacturer fixed the cartridge

Not knowing how the cartridge is fixed, we will not be able to make it out. So:

  • We examine it.
  • We read what is written on the side:
  • If the inscription in the form of 1-6 B10, then a cone cone is present in the design of the cartridge. In this case, it is able to clamp the shanks with a diameter of 1 to 6 mm, and the conical surface has a size of 10;
  • When the cartridge is the method by the method of fixing the cartridge, then in the case of a metric, it is labeled 1.0-11 m12x1.25, and a labeling 2-13 mm ½-20 UF indicates a inch thread. As a rule, our manufacturers use a metric thread, and foreign. Inch.

We dismantle the cartridge

If the fastening of the cartridge is conical, then it is removed simply. Through cautious beats with a hammer on the body. When fixing is threaded, the following actions are performed:

  • On the hourly move, unscrew the screw with the left thread.
  • We clamp the hexagon in the sponges of the vice, throw the key on it and hit it with a hammer. Thus, the cartridge will move off. True, you can act differently:
  • Put an electric screwdriver on the table;
  • Run it;
  • See if the cartridge moved from the place when the hexagon is hit on the surface of the table.

It happens that these actions do not lead to anything, then you will have to disassemble an electric screwdriver, and then:

If garbage got into the gearbox, then only this should be done. Here is a scheme that will help to understand how to disassemble the Bosch electrical screwdriver:

Here you see that in the Bosch electrical screwdriver, the cartridge and gearbox is a single knot.

Details about how to disassemble the gearbox of an electric screwdriver

Before answering the question of how to disassemble the Hitachi electric screwdriver, bison, bosch or any other, it will not hurt to know their design.

The design of the planetary gearbox

The gearbox includes the following details and nodes:

They can be plastic or metal.

The principle of operation of the 2.Step gearbox

  • Satellites rotate inside the ring gear, which are driven by the solar gear of the engine. At the same time, the speed drove less than the engine speed.
  • Through the solar gear, the torque is transmitted from the first drove to the second. The revolutions drove 2, which is connected in the shaft of the cartridge, decrease even more.

Reducer 3 steps works in the same way, but there are added 1 more planetary mechanism.

Dismantling

  • Remove the cartridge;
  • We spin the case;
  • Disconnect the gearbox from the engine;
  • Remove the plate;
  • We take out all the details in order;
  • We unscrew the bolts connecting 2 halves of the gearbox;
  • Correct the diameter of the spring in a smaller way using pliers. Thus, the inclusion of 1 gear will improve;
  • We disassemble the coupling, removing the locking ring, washers and bulk bearing;
  • We take out the shaft.

To the question of how to make out an electric screwdriver, a video shot by the master of his craft will be very helpful. It will answer general questions and, in particular, how to disassemble the Interskol battery:

But in this video, the analysis of the Hitachi battery is considered:

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Keep in mind: manufacturers do not produce repair kits for gearboxes. Therefore, all that you can do after disassembly is to clean it and change your lubricant. If the details are worn out, then the repair is to complete the replacement of this unit. The presence of an excessive amount of lubrication in the gearbox does not contribute to the good operation of an electric screwdriver.

Inquisitive minds analyze the popular Blue Bosch:

Powerful enough for its class, the correct moment coupling, reliably disconnected during overload. The cartridge clamps the equipment well, radial backlash is moderate. Switching speeds occur without jamming, clearly and accurately. LED backlight shines just into the working area, it’s a pity just not two LEDs but one.

As you can see, nothing complicated. Try it. It is interesting!

Repair of the stator corner grinder

The reason for the failure of the grinder stator can be determined. To do this, you need to pay attention to interruptions in work. The rotor can develop speeds exceeding the permissible, which will indicate the inter.Seal closing in the winding. Many breakdowns can be eliminated only in service centers, but for uninterrupted work you can carry out timely cleaning, lubrication, replacement of brushes and bearings.

The failure of the stator of the corner grinder of Makita rarely occurs, and the cause may be constant overheating of the corner grinder. In this case, the case heats up greatly, and the smell of Gary appears in the ventilation ducts. The stator winding may have a short circuit or break, so without special devices to determine the malfunction and repair the device is difficult. For repair, a corner grinder with your own hands or replacement of a stator must carry out the following actions:

  • Reducer dismantling angular grinding grinding;
  • Rotor dismantling after removing the mounting plan;
  • Removal of stator protection;
  • Removing the screws of the stator mount in the case;
  • Removing the handle cover and turning off the food wires;
  • Extracting the stator.

Angel Grinder repair and greasing | grinder replace gear 6-100 by knowledge king

The stator is tightly installed in the case, so the extraction process can be accompanied. Most often, the stator is subject to replacement, but sometimes amateurs can do rewinds on their own.

The component of the mechanism of the device

The bearing.Baked bearing is a frequent cause of patchings of grinders.

The machine has internal nodes and mechanisms, the device of which also needs to be understood;

  • Anchor. This is one of the internal elements of the electric motor, which makes rotational movements during the operation of the device, the speed of which is regulated. The parameters of the tool power determine the speed of the anchor, the higher it is, the more powerful the device. With normal operation, the anchor should rotate easily and freely, nothing should impede its rotation;
  • Collector. This element has the form of a separate anchor site and force and control windings are displayed on it. The collector performs the function of applying to the engine and control unit. To see it, it is necessary to remove the case, it has the form of polished contact plates with significant sizes;
  • Electric power plants. Plays the role of a conductor for wiring from a power cable to a collector. If this element functions normally, then the sparks will go weak and uniform, they can be observed through the ventilation holes in the device body;
  • Gearbox. Is a mechanical device located in the front of the machine. Its purpose is to convey the mechanical energy of a rotating anchor to a rotating disk. In this case, the revolution of the rotating disk and their speed of speed are also set to setup;
  • Stator. This is an element of the electric motor in which the anchor is moving. It is the most complex element, since the windings in it should be strictly pressed out in accuracy. The stator rewinding is not recommended for yourself, it is better to entrust this work to the master.

During repair, it is recommended to rely on the layout and electrical circuits, have instructions on hand, which was attached to this particular model of grinding machine. But such instructions do not go to many models, in this case it is most reasonable to not carry out repairs on their own, but seek help in the service.

Do.It.Yourself corner grinder repair. We eliminate typical malfunctions

The main principle in the repair of any electrical equipment is the postulate “Move from simple to complex”.

Whether it is household electropatron or turbine at a hydroelectric power station. The repair sequence should exclude elementary malfunctions in the first place. Electrics and electronics are not in vain called “two contacts of contacts”. Typical malfunctions of the Bulgarians, coupled with the methods of their elimination: are as follows:

  • The tool suddenly stopped showing signs of life. With a probability of 90 %, we can conclude that the current from the outlet does not get to the electric shock. That is, the problem is either a power fork, or in the wire itself, or in the mechanism of the “Start” button. It is enough to disassemble the case and “call” the cable with an ordinary tester for the presence of breaks. It is often enough to replace the wire, and the corner grinder will earn as new;
  • The wire with a fork is guaranteed to be intact, and the tool is still immobilized? It is necessary to disassemble the starting mechanism, and it is advisable to march the contacts removed. If you subsequently connect them incorrectly, then the winding may burn or jam the anchor. You can replace the start button with any similar, working parameters are marked on it quite clearly;
  • The “Start” button and the power wire are in an efficient state, and the corner grinder does not want to work? It’s time to do shetk holders. It is often enough to clean the contact plates on the collector, and the long.Awaited spark appears and even buzz of the mechanism. If it is not, then it is necessary to replace the brushes. The resource of these devices is usually limited to several years. A number of models of the Bulgarians are available with a conjure connection of electric burners, to fall out and put new ones in the kit, their partial replacement is not allowed;
  • After replacement, carefully inspect the old electrostis. If they have uneven wear, this is a clear sign of the displacement of the center of the severity of the instrument or its mobile internal part. It is better to contact a specialized company for repairing complex electrical equipment. It is unlikely that you can adjust the balance without experience independently.

Replacing brushes belongs to the “top of the first level” with independent correction of malfunctions in electric grinding machines. You can continue to paint repair recommendations on how to disassemble the gearbox of the corner grinder, rewind its winding or reconfigure electronic filling. But serious breakdowns require a serious approach to work. If this gearbox you have never seen how you will be able to fix it? The chance of turning on a corner grinder depends on your common sense. Saving on professional repair will result in the loss of the entire tool.

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