Jammed the shaft of a trimmer for the grass what to do. How to unscrew the head of a trimmer for grass

Frequent malfunctions and repair of Chinese trimmers.

A gasoline trimmer for grass, which is also called a motorcycle or a benzocosa, is a complex technical device. Therefore, sometimes he breaks and ceases to work normally, or does not start at all.

Despite the variety of brands and models, all breakdowns of such equipment can be divided into several groups, which we will talk about further.

In this article, we will describe the most common malfunctions that the owners of the benzotrimmer may encounter, and talk about the ways to eliminate them.

Malfunctions of the new lawn mower

List of faults of the new lawn mower (gasoline trimmer for grass), which also apply to used tools with a two.stroke engine:

  • Try to replace the candle, even if there is no soot on it. If there is a fiddle on the candle, clean it and, before replacing, try to start the engine with it.
  • Open the gas tank cover. If the engine starts, then the check valve of the fuel tank cover does not work. Try to blow it with air from the outer side of the lid.
  • The amount of oil in the fuel mixture was overestimated. Add oil to the proportion indicated in the instructions on the package (bottle, canister) with oil.
  • Carburetor adjustment is required.

An example of consolidating the composite handle of the Hoper lawn mower with protection against scrolling using parts of a rubber glove:

How to repair a starter of a benzo.tool with your own hands?

In the case of a break in the starter cord, everything is clear: we take out the old rope, take the suitable one along the length and thickness (you can linen), stretch it through the hole in the coil, tie the knot. Next, we take the spring to the number we need, only after which we fix the handle. and the voila! about how all this is done is clearly shown below.

Installing or replacing the starter of the starter motorcycles, motorcycle, trimmer for grass

But what to do if everything is in order with the rope, and the coil (pulley) of the starter is not wound? Consider this issue step by the example of the starter of the ADA Grounddrill gasoline motorized car, having a pulley with two metal antennae for 2 hooks.

In the case of other types of manual starters of the similar structure, which are widely used in gasoline motorcycles, trimmers and motorized carriers, the entire starter repair process will look similar, differing only in some nuances.

Starter repair: disassembly

Unscrew the screw with which the pulley is attached to the starter cover. We take out the antennae, spring. We pull the pulley itself carefully so that the spring does not bounce into the face. Even with the most neat disassembly, it usually immediately flies out of the coil and sharply turns into a long metal strip or twisted by rings.

Gently pull out the white.tolerator’s white coil. do not be wounded up by the spring!

If the spring burst or one of its hooks-stalks has broken, then it will not work out to repair the starter and quickly-it is necessary to replace the spring. In order not to spend money on the purchase of a new starter, you can look for only her on sale.

In case the starter spring simply fell off, t. e. One of the hooks came out of the hook, it is enough to insert it, if necessary, slightly tightening the hooks more tightly (just do not break off!) Install the spring with an external hook in the groove of the pulley and begin to twist it, while holding your fingers inside the coil and preventing it from jumping out of there.

Clutching the spring to the pulley, roll the spring in circular motion

It may not seem so easy to insert the starter spring from the first time, but everything comes with experience. Having trained a little, you can easily wrap the spring into the pulley in a maximum of a minute.

The winding of the starter spring is made. It remains only to assemble the starter and take the spring to the desired value

How to assemble a starter?

The most important thing in the process of independent repair of the starter is to collect it correctly.

After the spring is completely wound, you need to carefully turn the coil and insert into the starter case so that the second spring hook enters the groove of the case.

By installing the pulley (in this photo. black), look through the hole in it so that the spring hook gets into the groove on the starter cover

Then, if there is a spring under the screw, we install it first, not forgetting to put the washers from below and from above the spring.

Gently insert a cup with antennae into the grooves of the coil and tighten the screw.

Then keep sure that the puck is on the sprout does not fall. Why is it important? The fact is that the spring scratches a plastic cup with its end, as a result of which the latter wear out and begins to tightly pressed with a screw to the reel. For this reason, a situation may arise, very similar to the breakdown of the spring: the handle stretches out of the starter, but does not return back. However, when the starter is weakened, this problem disappears. It is easy to eliminate such a starter malfunction: it is enough to choose a spring of the same diameter, but a little longer, or put an additional washer. If we simply slightly tighten the screw, then it will be twisted and fly out, and this will increase the likelihood of a spring breakdown, since the pulley will not fit tightly with the starter case.

The coil to the body was screwed, now we need to pull the spring. Before this, it is necessary to remove the starter’s handle from the rope in advance. If the knot is too durable, then you can just cut it or try to untie it, for example, using a pair of pliers. This is done so that after you bring the spring, you can pass the rope into the opening of the starter cover. The second end of the rope should be fixed in the coil even before it is installed in the case, it is not required to be roped on the pulley before pulling the spring. you will do it after.

Manual starter malfunction associated with the spring

A dense starter spring with a hook is the main element of the design of a hand starter. In addition to the spring, the starter also includes the following components:

Rating of gasoline trimmers: TOP-15 of the best models of 2021 and tips on how to choose a spring repair-the main component of a hand starter, boils down to replacing the element.

On a chainsaw, for example, it is an element in the form of a circle, inside which a flexible spring is wound.

Springs in this form are sold in the technique store. It remains only to buy a part and replace.

Repair of a hand starter may also imply a replacement for a cord. If it is incorrectly wound on the pulley of the springs, then the generator will not occur.

  • Wind the cord from the end of the pulley (done to avoid scrolling);
  • The second end of the cord is drawn into the cover of the lid;
  • The winding of the cord should continue until it stops, t.e, as far as the length of the rope is enough;
  • After winding, the cord is pulled by 15-20 cm, to check the turn of the pulley of the spring;
  • After winding, you should also check how the spring works after stretching and letting go (if everything works clearly, it is recommended that the cord is soaked for another revolution).

At portable power plants, the repair of the spring and cord is carried out as follows:

  • From the side of the generator there is a circiva circle recorded by three screws that need to be unscrewed;
  • Remove the pulley with a spring and a cord;
  • Check the condition of the cord, which can be completely removed from the side of the holder (the upper cap of the holder is removable).

Note. Often, a bundle of the cord, which ensures it from above, weakens. To correct the situation, you need to heat the end of the nylon rope with a lighter, and then wind a new knot.

As for the pulley with the spring, it changes in the same way as it was described above.

The device and principle of operation of the starter on the trimmer

The gasoline engine is, in principle, the main part of the motorcycles its power lies in the range of 0.5-2.5 liters.With. The movement from it is transmitted by the shaft located inside the hollow bar, and then through the gearbox, consisting of gears, already a fishing line or a knife (working body).

Also, the lawn mower has the following elements:

  • protective casing;
  • lever;
  • a belt designed for ease of use of the device;
  • Starter serving for launching a gasoline internal combustion engine.

All parts of the motorcycles are presented in the photo further.

The starter on the trimmer is an integral part, which performs the engine starting into operation. It is shown separately in two photos below.

The starter mechanisms of various models of the benzos work according to the same principle: during the launch of the ICE, the protrusions marked in the photograph above the number 1 are included in the hook with dogs 3. When the engine begins to work, they return to their previous position due to the effects of centrifugal. Similar role is also played by wires 2.

The process of returning to the initial position of the elements of the mechanism occurs due to the presence of a spring screwed around the axis. It unfolds when the rope is pulled. After releasing the cord, it is drawn and winding due to folding the spring. During the launch of the ICE of the lawn mower, the triggering mechanism turns its shaft until it starts to work (starts).

To date, gasoline motorcycles are equipped with two types of starter mechanisms:

The first option is much more common.

The starter on the trimmer can function without breakdowns for a long time. It is impossible to unambiguously indicate the deadline. Everything is determined by the initial quality of the device and compliance with the rules of handling it.

The engine of the lawn mower is not started.

Everything is simple here, a few main points for any motors: that the engine works good compression, its absence will not allow the motor to start. The following that you need to check this ignition, there will be no ignition without a spark. The clogged fuel system will make it difficult to feed the fuel and the contaminated exhaust system also greatly complicate the launch of the motor.

Perhaps this is the main thing you need to check. The most popular repair scheme is the exclusion method. That is, in order we cut off options for faults, I will tell you more:

Fault of the piston group

On the entire two.stroke technique that is brought to us, we first check the bully on the piston and cylinder. You can do this by unscrewing the 2 muffler bolt and taking it off, shut up the exhaust window. If the piston is smooth and the rings are springy. this is good if the piston is in damage or rings and hesitated. this is not acceptable. The cause of the breakdown is overheating, the old fuel mixture or the absence of oil in the solution. The only panacea is a major overhaul with the replacement of the piston.

Trimmer ignition malfunctions

Next, check the spark, leaning a candle to the mass and scrolling as a starter as follows. If there is no spark, disconnect the wires from the coil to exclude the switch. We perform all operations only with a new candle. Dragged, pumped, wiped candles will not work. There are also cases when a spark disappears on a heated spit and does not appear until complete cooling. Poor contact of the cap and high.voltage wire is possible. If the spark does not appear, the ignition coil replacement is necessary.

Fuel system pollution

If everything is in order with the motor and spark, let’s try to start. We recommend that you sprinkle the carburetor cleaner into the combustion chamber, under a candle or in the carburetor window. The motor will start and most likely stall, repeat the operation several times. If nothing helps, you need to try to clean the carburetor. We do not recommend climbing on our own, due to the presence of small details or their absence as a result of inexperienced repair. Fuel system pollution is the most common malfunction.

Carburetor malfunction

Unfortunately, cleaning the carburetor is not a panacea and it is not always possible to clean it completely. Even ultrasound and a good cleaner are sometimes powerless. Also in carburetors often fail: needle, check valve, accelerator valve, membrane, needle and saddle. Someone will say what to break there, but the saw carburetor is structurally more difficult than the car carburetor. In many cases, you have to change the carburetor in its entirety or some of the parts.

The clogged exhaust motorcycles

Since oil is present in gasoline, it burns and releases a lot of burning, which is postponed in the muffler and graduation window. On some trimmers, a mesh is installed. a flame arrester, it also needs to be cleaned. Muffler either change or try to burn. My experience allows you to determine whether the exhaust is clogged, just pulling the starter. If you find a dozen in the window, mcorm it, he should not get into the combustion chamber. Use good oil with low smoke emissions.

How to correctly install a piston on a trimmer for grass

Benzo tool. Likbez

Search on the blog (free coincidence): documents corresponding to your request: 9 [shows 5]

All my attempts to find out what kind of model it is and in what years it was produced, turned out to be in vain (I will be very grateful if you help me with something in this matter). Nevertheless, I can approximately assume that it is somewhere in the 60-70s of the last century. Bosch uses a chainsaw.

Number 21554 knocked out on a crankcase. What number it is, for me a riddle.

On the left side of the saw there is a sign with the inscription.

What information is indicated for me. dark forest :-))).

I partially dismantled the chainsaw (to clean and evaluate the state of parts). I also replaced the tip of the spark plug (he cracked everything) and installed the ignition switch (it was absent at the time of purchase of the saw). This information, as you know, is not original :-))). And one more minus. The absence of a lid of the oil depot. (In the photo everything was marked with arrows).

There is a chain on the saw. Takasago (I have never heard about it, but this is evidenced by the inscription on the cutting tooth).

Dolmar chainsaw. About three or four months ago I had this copy in my hands Dolmar chainsaw.

Dismantling. Assembly of the chainsaw of the Stihl MS180. Satisfaction of the application: 21.43% Fragments of the text of the message. Dismantling. Assembly of the chainsaw of the Stihl MS180. STIHL MS180 dismantling chainsaws. STIHL MS180 assembly chainsaw.

Replacing the piston group with a chainsaw or trimmer

Repair at this level should always be balanced. In such small, high.speed engines, replacing one burned or stuck piston does not give a long result, and, if necessary, it is necessary to replace the entire piston group. Therefore, you need to decide whether to continue to use this saw or buy a new saw.

If this is a professional model, then such a repair should be carried out, but if it is an old household model, such as Husqvarna 40, and it worked for more than ten or twelve years, it is unprofitable to repair it. Since its repair will cost as much as buying a new saw, albeit not Husqvarna, but on Partner P350XT Chrome, the cost is 165, of course, quite sufficient. In addition, Husqvarna sells such saws, as Partner is her subsidiary.

shaft, trimmer, grass, unscrew, head

But if you still decide to repair a chainsaw or a trimmer for grass, then you need original spare parts that are expensive. If the engine works fine, the first repair may not occur soon, and only the piston rings or rings, depending on the model. But if the saw is stuck, you need to change the entire piston group. cylinder, piston and rings.

It should be noted that the chainsaws of Husqvarna 136/141 have a service life of approximately 500-600 hours, Husqvarna 340/350. 1000-1200 hours, professional chainsaws of at least 2000-2500 hours, subject to strict compliance with the instruction manual. In fact, these figures cannot be relyed, since a real resource can vary significantly both up and down. But we can roughly say that semi-professional saws work 3-4 times longer than amateur, and professional. up to 10 or more times.

Description of the piston group of the chainsaw of Stihl 180

On the chainsaw of the Stihl 180, the piston group has a diameter of 38 mm. The dimension of the CPH of the chainsaw is determined by the diameter of the piston, the cylinder is slightly larger. In the standard configuration of the CPG MS 180, it is supplied with the piston finger, two piston rings and two stopping.

The inner surface of the cylinder should be perfectly polished and have a glossy shine, which you need to pay attention to when buying a spare CPG for the Stihl MS chainsaw. If there is damage on the inside of the cylinder, it is not necessary to install such a cylinder

A distinctive feature of the CPG on STIHL MS 180 is that it has two compression rings, while almost all its main competitors have only one. As the manufacturer assures, installing a pair of rings, allows you to better stabilize the piston in operation, strengthen its cooling and increase the compression in the engine, due to which the launch improves.

How to independently disassemble and repair an electric braid

Before disassemble and repair an electric braid, you should check the condition of the outlet and the voltage in the network. If its value deviates from the norms specified in the instruction manual, then you should not even try to work as a device without a stabilizer designed for appropriate power. Otherwise, the electric motor may fail. Only after determining the fact that the cause of the trimmer refusal is directly connected with it, we can begin to analyze the mechanism with the repair goal.

Dismantling and repair of the electric part

Dismantling of electric cosmos for the repair of its electric part is carried out in such a sequence.

  • Put a trimmer for grass on a flat surface (for example, a table) that does not contain extra objects.
  • Spin the screws of the lids located on one side.
  • Remove the unscrewed half of the case, getting access to the start button, electric motor, brush unit, bearings, electrical connections (these elements are shown in the photo below).

Brush and bearing nodes are presented in the photo below.

The braid for the grass will work without a thermorele, you will only need to constantly check the temperature of the electric motor, periodically let it cool down. You can also install a new similar sensor.

The button for starting the electric motor can be checked by the jumper by the jumper of its contacts. If the trimmer for the grass works, then the problem is clear. But this option is unsafe. Everything should be done carefully so as not to get an electric shock. To change the button, you should use the screwdriver to extract it from the seat and attach the wiring from the old to the new. After replacement, you need to assemble an electric shout, and then check its performance.

Replacing brushes is required if they are destroyed. At the same time, it is enough to pull out the old ones from the grooves, and set the new ones in their place.

The connecting terminals on different models of trimmers are practically identical, so the connection-reference of the wires is equally performed.

Replacing the bearing is a rather complicated operation, because it can boast and not be removed from the engine shaft. Tighten or hit it carefully so as not to damage the rotor or seat.

When a trimmer electric motor for the grass fails, and it must be replaced with a new one, you should carefully remove the fan and bearings, and then install them in the same place. In terms of expenses, replacement is almost comparable to the acquisition of a new mechanism. Its implementation in the absence of experience with electric motors is best entrusted to specialists.

Assembly Electrics

Instructions for assembling the electric part of the motorcycles are as follows:

  • install the engine, tightening the fasteners;
  • connect an electric circuit;
  • The wires are placed neatly between the individual compartments into existing recesses;
  • close the top cover, snapping the locks and screwing it with screws.

After assembly, check the performance of the device.

There are a lot of possible breakdowns in gasoline and electric trimmers. So that the device is working for a long time, it should be kept clean, in a dry place. An important point is regular preventive measures (for example, reducer lubrication) and compliance with operation rules set forth in the instructions for the device. Buying equipment is better than high quality from well.known manufacturers.

Disassembled the mechanism, it is recommended to take pictures of the process in stages so as not to forget anything, and when assembling, not to miss a single part. When replacing parts, you should pay attention to the choice of suitable components: it is better to use original spare parts.

In some models, the rod consists of two parts. a coupling is used to connect them. Such devices are convenient during transportation.

Why is the gasoline trimmer not starting for the grass

The reasons why the gasoline trimmer for the grass stopped starting is different, therefore, a phased diagnosis of the apparatus is required.

Fuel tank (fuel quality)

Remember that always before starting the unit, a check of the presence and quality of fuel is required. In this case, you should not be greedy and save, as well as “clever” about the amount of oil added. Everything must be done according to the management attached to the apparatus, since when the piston group fails, its replacement will cost about 70% of the total cost of the trimmer for the grass. Pour fuel due to the fact that you will fully conside it when performing work. After a while, the gasoline remaining in the tank loses its properties and can harm the engine. Therefore, do not prepare the mixture for the future and in large quantities. If the lawn mower starts poorly, try to drain the “old” fuel from the tank, and season it with a freshly prepared mixture.

Important! To refuel the device with fuel, the origin of which is unknown, fraught with negative consequences. Gasoline should be of high quality, bought at a gas station, and its brand should be not lower than AI-95.

Candle and candle channel

So, you changed the fuel, but nothing has changed, and the trimmer for the grass still does not start. In this case, it is worth checking the candle channel: whether it throws it with a combustible mixture. Often users transfer the air damper to the “OFF” position when starting, and when the engine started, they do not transfer it to the “ON” position, after which it stalls. Further, an attempt to start the internal combustion engine to again leads to the fact that it floods the candle with gasoline, and the start becomes impossible. To diagnose and eliminate the possible problem in this node, do the following.

  • It is necessary to unscrew the spark plug, wipe it well and dry it. When installing a candle in the ICE cylinder, it should be dry.
  • Draw from the combustion chamber the fuel accumulated there. This is done through the hole from which you twisted the candle.
  • In the presence of soot on the electrodes of the candle, it must be removed either with a thin file or a nail file.
  • Do not forget to put the gap between its electrodes before installing the parts in place. The gap on the candle should be 1 mm. As a probe to check the gap, you can use a coin.
  • Next, collect the block, read the start instructions and try to start the engine again.

If the engine does not start, then you will need to check the spark. For this:

  • unscrew the candle;
  • put on it a cap of a high.voltage wire;
  • Touch its metal part to the cylinder body (to provide contact, you can insert a tubular key) as shown in the figure below;
  • pull the launch cord so that several engine speeds occur.

Normally, with each piston roll between the electrodes, the candle should slip a spark. If there is a spark, then the reason that the internal combustion engine is not launched should be sought in other nodes of the device.

For a better understanding of the process, how to test the candle for the presence of a spark, you can use this video where the check is shown by the example of the Lawn Mushiel “Soyuz”.

If there is no spark, then in the beginning check the cable connecting the candle to the coil. perhaps the reason is in it. You can call it with a tester. In case of detection of the rupture of the chain, a high.voltage wire will require a replacement.

Also the reason that the spark has disappeared is a malfunction of the ignition coil (magneto). The figure below shows what the coil (magneto) looks like from the gasoline trimmer for Patriot grass (Patriot).

To exclude the malfunction, it will be necessary to use a tester to check the Magneto trimmer for the grass, namely, its primary and secondary winding. On the primary winding, the resistance should be in the range from 0.4 to 2.0 Ohms. If the device shows 0. this means that there is a short circuit in the winding, and if infinity is a clear sign of a chain break. The resistance on the secondary winding should be in the range from 6 to 8 kOhm.

On some coils, it can reach the value of 15 kOhm.

Air filter

If your lawn mower does not start well or stalls immediately after starting, you should pay attention to the air filter, since it can be clogged, as a result of which the air does not enter the combustion chamber, and fuel ignition does not occur. To check if the filter is the case, remove it and try to start the engine. If he earned, then the reason was found. The filter needs to be replaced or rinse well and dry before installation. In the case when you find the oil in an air filter, it must be washed with gasoline, squeezed well and dry at least 2 hours before installing in place.

If the unit does not start with an air filter, it is still recommended to check the fuel filter.

Fuel filter

This filter cleans fuel of possible pollution. If it is scored, then gasoline does not enter the cylinder, and, accordingly, the unit does not work or stalls after starting. The fuel filter is located at the end of the fence hose, which is located inside the fuel tank. To get to the filter, it is necessary to extract a cork with tubes emerging from it.

When extracting traffic jams, a fence hose can disconnect and stay in a tank. It is extracted with a tweezer.

Next, remove the old fuel filter from the hose and put on it a new, pre.acquired. You can also clean the fuel filter if you do not have new. The filter must be fixed on the hose using a spring latch.

Install the fence tube on the cork and insert the last into the tank.

Electric trimmer for grass vibrates

Many mowing users noticed that some time after the start of the apparatus, it begins to vibrate very much. On some trimmers, mainly in models more expensive, an anti.vibration system was installed in the form of shock absorbers seized between the engine and the bar. But in some cases, even she does not save from strong vibration. The reason that strong vibration appears in the trimmer, there may be a small amount or complete absence of lubrication on a hard or flexible shaft located inside the rod of the apparatus.

Replacing the lubrication of the hard shaft is as follows:

  • Apply a small amount of lubrication to the shaft and evenly smear it along the entire length of the part, including the slots at the ends of the rod (if they worked, the shaft will have to be replaced);
  • After lubrication, insert the shaft back into the bar and put the gearbox in the same place.

The lubrication of the flexible shaft is as follows:

  • unscrew and remove the mowing head;
  • remove the bar from the electric motor by unscrewing a couple of bolts;
  • Pull out a flexible cable from the bar;
  • Lubricate the cable with grease along the entire length.

This is done like this: first you need to lubricate the end of the cable, and then insert it into the bar, after which, as it moves into the pipe, you should apply grease to the part and evenly distribute it on the surface. Then insert a bar with a flexible shaft into an electric engine and fix it.

In the event that the lubricant did not help, and the vibration continues to appear, you will need to change the flexible shaft.

Gear lubrication of a trimmer for grass

Lubrication of gears must be carried out regularly in accordance with the recommendations set forth in the operational instructions of the model used. You need to do this also if:

In addition to the gearbox, it is also necessary to regularly lubricate the shaft of a trimmer for grass. This is the norm of proper care of the device.

With the constant use of a trimmer for grass, its gear mechanism experiences a load from grass, dirt sticking on knives, or due to a change in torque. Lubricants must be selected high.quality to extend the service life of the gearbox.

Used types of lubrication

When choosing lubrication, it is necessary to take into account the following factors:

Famous manufacturers, for example, STIHL, Husqvarna and others, in addition to trimmers, produce lubrication for them. Such products not only reduces wear, but also protects the metal of gears from corrosion. Therefore, for motorcycle from these brands, it is better to use their lubricants.

If the composition used for lubrication has good adhesion, then it is practically not squeezed out of the gearbox through the gaps.

For different models, lubrication is consumed in different ways. This is determined largely by the intensity of the use of motorcycles and heating the transmission mechanism. It is believed that the lubricant is enough if the temperature of the gearbox during operation does not exceed 40 ° C.

By consistency, lubricants for a trimmer for grass can be:

In terms of composition, the following types of lubricants are in demand:

  • graphite, significantly reducing friction, as a result of which the rotation of the gear improves;
  • lithium, which are also an excellent anti.corrosion composition, saturated with increasing the wear resistance of metal with additives without harmful substances;
  • universal, containing high.degree mineral oils and improving operational characteristics components.

An example of suitable lubricants are: Champion EP-0, Gear Grease Oregon, Oleo-Mas, Azmol 158, Litol.24. You should also pay attention to the advice of manufacturers on this issue and use the materials they offer. You can buy them at specialized retail outlets.

A lubricant Champion EP-0 Universal 120 gr

The algorithm for self.lubrication of the gearbox

To make lubrication of the gear ratio, its preliminary disassembly is not needed. A special hole for these purposes has already been laid in the device (it is shown in the photo below). In addition to gears, when lubrication, you need to pay attention to such elements of the mechanism:

Pour oil or apply solid grease through a tavniper closed by a screw. At the same time, they perform actions in the following sequence:

  • The gearbox body is cleaned of dirt and adhering grass, especially thoroughly the plot around the plug so that the garbage does not get inside the mechanism;
  • Using the appropriate tool (often it comes with a trimmer), the cork is unscrewed;
  • The selected lubricant is introduced from the tube into the open technological hole, or using the syringe, as shown in the photo further;
  • screw the cork in place.

When making lubrication, you need to rotate the knife so that it is evenly distributed through the teeth of moving gears.

If for any reason the gearbox needs to be disassembled, then the old lubricant must be completely removed from the entire surface of the gears and housing, shaft, and only then use the new. The disassembled mechanism is conveniently lubricated with solid compositions.

The entire reducer lubrication process is demonstrated in the video:

Lubricating the gear node is required at least once during the year, but it is recommended to do this every 20 hours of intensive use of motorcycles. If the first signs of malfunctions with the mechanism appear, then you need to make lubricants as quickly as possible.

How to replace a trimmer gearbox for grass: an algorithm of action

To replace the gearbox with a similar part from the same manufacturer, it must first be disassembled and removed from the bar. At the same time, they act according to the following algorithm:

  • weaken the fitting bolts located under the transfer mechanism;
  • Using round.drawers, remove two corkscrew rings;
  • Applying the puller, pull the bearings from the driven and the leading shafts;
  • Then collect the mechanism, in the reverse order by installing all spare parts.

The disassembled transmission mechanism is shown in the photo below.

If the puller is not at hand, then you can try to gently knock down the bearings. When they have stuck and do not move at all, you can heat them using an industrial hair dryer (at a temperature of 600 ° C) and remove.

Collecting a gear node is easier than disassemble it. Only a light tapping with a hammer for planting parts in place may be needed. After assembly, it is imperative to check that the driven shaft turns out by hand.

Когда есть необходимость замены передаточного узла неоригинальной деталью, тогда следует учитывать их взаимозаменяемость. At the same time, it should be taken into account:

  • the diameter of the bar (this parameter often is 25.4 or 26 mm);
  • The parameters of the drive shaft. the shape of the docking space and the diameter (its common value is 8 mm);
  • option of consolidation of protection.

If the considered parameters coincide, then it will be possible to set a part from other models.

Timely lubrication of the gearbox will ensure its prolonged operation without repairs. In addition, modern materials protect the metal from corrosion well, increase its wear resistance. When choosing, preference should be given a lubricant recommended by the manufacturer of the operated trimmer for grass. If such compositions are not possible to purchase, then the analogs considered or other suitable in properties should be applied. When it is necessary to disassemble the mechanism during the repair, this should be done carefully so as not to damage individual parts.

Quick way to check the electrical circuit

When the collector engine is included in the operation, the current sequentially passes through all the half.tests of the stator and the rotor through the brush mechanism.

A paradox with an electrician or what a rush leads to

Banal truth: the voltage is supplied with the switch with the contacts of the fork inserted into the outlet.

However, my neighbor in the country managed to go over in this matter and invited me to look at the brushes of a disassembled electric motor trimmer for the grass in order to explain why he does not work.

When I asked about the voltage in the outlet, he confidently stated that he had checked it with an indicator. I asked to show, because I do not trust such things in such matters.

He took the indicator, and showed that he was glowing from the contact of the outlet. Then I asked to go to the extension cub and rearrange it, changing the nests. At first, his surprise appeared quickly: during the second check, the indicator light did not light up.

In one wire of the extension cord there was a cliff, which eliminated the voltage supply to the proper trimmer engine for grass. There was no point in disassembling it and watch brushes.

Any verification of the performance of the electrical circuit start by analyzing the serviceability of the power circuits. This reduces the search time and elimination of defects.

Change from trimmer head to grass blade

The most important element of the electrimmer

The trouble with beginning users is that they do not fully understand the role of temperature in the work of a collector, and any electric motor.

The electric current passes well through the cold or overheated wires of the winding and normally creates a magnetic field rotating the rotor. And the isolation varnish, and other surrounding materials, are melted and flowing at the temperature.

The photo shows a trimmer cover deformed from the high heating and the engine failed and the engine.

Below is a photo of the burned insulation of the stator and rotor windings, which sprinkled into a single lump.

It is not profitable to eliminate such breakdowns. Replacing a burned.out engine in a repair shop at a price is slightly inferior to the purchase of a new trimmer for grass in the store.

Compliance with the temperature regime

When working, it is necessary to monitor the heating of the case.

This requirement is especially relevant for low.power models with the lower engine location. They are designed for short.term cutting of lawns with low grass: they have a simplified design, are not equipped with overheating protection.

Electric trimmers for middle.class grass and above are equipped with protective thermallack. When a critical temperature reaches with its bimetallic contact, it breaks the circuit of electric current, and after cooling it restores.

On my trimmer it began to work falsely: I had to block the contacts. Described this case in an article on the repair of a trimmer for grass in the country. In detail, he showed photographs in detail the sequence of the engine disassembly. Meet the technology.

How To Change A Straight Or Curved Trimmer Shaft

With the nursed contacts of the thermmorele, Trimmer for the grass worked until the end of the season. During kosba, he periodically checked the temperature of the case with his hand, took breaks. During the winter I found a new thermorele, replaced the old. After that I work with thermal protection.

How can you overheat the engine of the electrimmer

Since ancient institute, I remember the phrase of the teacher of the Department of Sopromat and the theory of the strength of the shells about the reliability of the design of any mechanism: the entire equipment is designed and created for optimal conditions with a permissible coefficient of strength.

It is impossible to underestimate it: there will be frequent breakdowns, and overstating it is not economically profitable: the cost increases dramatically.

I did this introduction in order to emphasize that the operating conditions indicated by the plant must be studied, strictly observed. Otherwise, the breakdown is inevitable: it will be necessary to carry out the repair of the electrimmer.

What are the “newly.minted rationalizers” do to facilitate their work:

  • install a thicker fishing line for a trimmer in a mowing head;
  • Remove the protective casing with a knife of fishing line;
  • Mount on the head “Eternal fishing line for a trimmer” from chains, thick wire, filmed ribbon from plastic bottles;
  • Fasten homemade knives from steel strips.

A thick fishing line for a trimmer really mows higher grass, but it creates an increased load on the engine. Overheating it does not arise immediately, but after some period of time.

How to look for malfunctions in the mechanical part

The transmission of rotation from an electric trimmer for grass is performed in the same way as models with an internal combustion engine: an integral shaft works inside the rectangular section of the bar, and a curved cable works.

Their length, diameter and design are selected by the manufacturer for specific dimensions of the composite bar.

Features of the junction of the composite bar

It is made by an adapter with a screw clamp.

The large screw head is made to conveniently adjust the position of the mowing organ at the bottom of the bar. The rotation angle is selected individually.

It is convenient for me to expose it so that the longitudinal axis of the protective casing and the axis of the electric motor are located in the same plane.

In this place, a malfunction associated with the transfer of torque from a direct shaft to a cable may sometimes occur in this place. It is manifested by the fact that at idle engine the trimmer for grass works normally, and already under a small load, the mowing head stops rotating.

The method of its elimination was well shown by the owner of the video “Repair of the Electrimmer” Roman Shapkov. I recommend to see.

Method of attaching a mowing head and a casing

On my trimmer from below the rod, the adapter is fixed with rivets, into which the fastener bolt of the protective casing will be plunged.

The output shaft of a rotating cable has a hexagon at the end. A plastic mowing head is put on it.

From the inside, a return spring of the automatic discharge of fishing line during kosbe is inserted into it.

A spool was inserted into it. It is fastened with a fixing nut from above.

The device of a spitter head with a fishing line is quite simple.

However, all plastic parts do not have high strength, subject to wear. Their working surfaces are erased. After three seasons of work on my trimmer, the output holes of the fishing line from the mowing head expanded, the thickness of the fixing nut decreased.

It is difficult to apply protective measures to wear, and repair of these parts is easiest to fully replace the head. It is easy to buy it: you just need to know the exact dimensions of the hexagon and evaluate the new design according to the working characteristics.

The secrets of the selection of fishing line

Among the frequent malfunctions of the trimmer coil, there are cases when the fishing line for the trimmer ended or simply confused due to improper winding on the spool. It is not difficult to eliminate them.

But in practice, I met with another defect in the fishing line, which was sold on the state retail chain from Patriot LLC company. Her view in the factory packaging.

As I understand it, it is specially hidden in a sealed package: you can not touch when buying.

When I opened the packaging to install the fishing line in the spool, its plasticity immediately caught my eye, and not elasticity. It is easily bending, behaves like a soft wire: when in contact with the grass, it immediately breaks. It is impossible to mow: she managed to return to the seller.

Since then, I have been buying only that fishing line for a trimmer that can be molested in my hands and evaluate its operational properties.

I try to refuse varieties of ordinary round fishing line. I prefer a ribbed shape to them with faces: asterisk, trapezoid, square or triangle. They are better cut off the grass.

How to eliminate increased vibration

Reliably collected trimmer mechanics for grass is well balanced. It provides convenient work. However, bearings can be worn out over time, lose lubrication.

A prefabricated shaft transmitting rotation from the engine of a spool is able to touch the internal walls of the bar, creating excessive friction with heating.

Such a defect can and must be eliminated. This technology is shown by TV repairman with his video “Vibration during the operation of Elektokosa”.

If you still have questions about how to carry out the repair of the electrimmer, then ask them in the Комментарии и мнения владельцев. I will answer.

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Where the electrical malfunctions of the trimmer for the grass arise and how to determine them

This happened in my practice that the neighbors have already turned for help twice when their engine did not turn on. The most interesting thing is that it was completely in working condition, and the defect was inside the extension cord.

Therefore, I recommend starting a proceedings with checking its serviceability. To do this, just insert the extension cord into the outlet, and measure the voltage at its end.

When using a screwdriver, the indicator will have to turn the power plug twice, checking the integrity of each core for the presence of a phase on the contact of the outlet.

If it is absent, then it already makes sense to look for a break in the wires in the power supply circuit. By the way, insufficient voltage levels can also affect the operation of the electric motor. This often happens in rural areas.

Then the voltage will have to be raised in one of the most acceptable ways for your specific case. Otherwise, a trimmer is an ethletric for grass can work with overload, overheat. Pay attention to it.

Когда мультиметра под рукой нет, то его можно заменить обыкновенной настольной лампой с любой лампочкой освещения, но лучше с нитью накаливания.

The power of its glow allows the indirect method to judge the size of the power and look for a break in the place of core in the extension cord. The wire will just have to be sorted out with your hands along the entire length. The loss of contact usually occurs near the outlet, where oscillations are most often created during kosbe.

If everything is fine with food, then we need access to the internal electrical circuit. To do this, open the screws of the body mounting. They are all located on one side, including a self.tapping screw, fixing the bar.

Both halves of the housings, except for the screws, are kept on plastic locks with latches. They must be opened with any flat and thin metal object, for example, a knife blade or screwdriver.

After that, the upper cover is easily removed. I immediately recommend taking a camera, take a picture of laying wires on numerous internal channels and recesses. Photography will help in the future assembly.

After that, you can proceed to the internal inspection and analysis of the serviceability of all electrical components of the scheme.

How to safely check the switch

Electric switching is performed by a small.sized switch having two fixed positions:

Its triggering must be checked with an ohmmeter or a call. With the button lowered, the readings on the scoreboard will indicate a very large resistance. urb or 0l, as on my device.

When you press the button with the fingers, an electrical contact occurs, and the resistance sharply decreases to almost the zero value.

How to call electric wires

Identify the wrestling or loss of electrical contact at any place of the circuit allows the chain to call or measure its resistance by a multimeter in ohmmeter mode.

To do this, it is enough to use even a simplified collector engine scheme shown above. It will allow you to sequentially check all sections of the voltage supply circuits to the electric motor.

I show this process on a segment from the power plug to the contact of the circuit breaker.

When measuring I use my multimeter Mestek MT-102. He showed the resistance of 9.3 ohma, which is quite acceptable. If a cliff is detected, then this place will have to be dealt with further.

In this way, a measurement is made consistently between all sections, the place of the cliff is determined. Do not forget about thermallane. It should always have a closed force contact in a cold state.

If a trimmer is an ethletric for grass by an outsider and does not work, then it makes sense to fully evaluate the correct installation of an electrical circuit.

How to check the serviceability of the electric motor on the trimmer

What to pay attention to during external inspection

The most problematic place is usually a brush-collection node and bearings in perfect condition of the collector mechanism, should sparkle cleanliness and be polished, the brushes are whole and even, and bearings are easy to rotate without a backlash.

Shown in the photo below, a small pollution of coal dust from brushes is considered a worker and is quite acceptable.

It is advisable to wash off such a carbon car with ethyl alcohol, cologne or even simple vodka during a preventive examination. After that, copper plates are wiped with a clean rag, paying attention to the lack of nicks, cracks, scratches.

I show the worn collector plates below, damaged by the poor fit of the brushes due to their large wear or weakening of the springs.

Such a collector during work creates constant sparking or even circular fire over the entire surface of the circle.

How to make electrical measurements

I have a check in a separate article on my website in a detailed check of any electric motor by a multimeter. At its end I talk about three methods of checking collector engines.

shaft, trimmer, grass, unscrew, head

How typical mechanical defects and ways to eliminate them with your own hands are manifested

The following damage to the kinematic scheme most often occurs on the electrimmer:

  • the bearings of the electric motor are cleaned or spoiled;
  • The fishing line for the trimmer is tangled or broken due to incorrect winding to the coil;
  • The torque from the engine to the mowing head is not transmitted;
  • The plastic case and individual parts melts when overheating due to increased loads;
  • enhanced vibration of a rotating head is created, which makes the kosbu.

How easy to check the work of bearings

It is enough to update the external clip regarding the shaft and immediately with tactile sensations of the fingers to evaluate the smoothness of their work, the state of backlash.

Broken and worn bearings must be replaced. Do not forget to update the grease if necessary: ​​remove the stream and apply a new.

How to prevent malfunctions of a mowing head associated with the commission of typical mistakes by home “craftsmen”

Trimmer heads are created by three types of structures, implying the issuance of fishing line in one of the ways:

The overwhelming number of products uses semi.automatic fishing line. It also allows a manual regime for adjusting the length of the cutting area.

A large number of breakdowns are associated with a violation of the operating rules recommended by the manufacturer, when a trimmer for grass begins to work outside of its capabilities. These include:

  • a significant excess of the diameter of the cutting fishing line leading to an increased load on the engine, intermediate shafts, gearbox and mechanical parts of the head;
  • installation of homemade knives or chains instead of standard structures;
  • Incorrect winding of the fishing line.

Such are the homemade like “eternal fishing line for a trimmer for grass” not only damage the kinematics of the lawn mower, but also injure people, causing harm to their health. I do not advise doing this to do. There is no economy here.

How easy it is to wind a fishing line for a trimmer on a spool

Usually this issue is difficult for beginners. Especially for this case, I made a narrative on my channel Yandex Zen.

The engine works, but the spitter head does not rotate: what’s the reason

The breakdown is associated with the cessation of the transmission of the torque of the engine to the working body. A defect can occur anywhere in the gear. Most often, in models with the gearbox, the reason lies in the wear of the working faces of the gear.

over, if the teeth on one are worn out, then both must be changed at once, because the second also suffered.

Hysteria gear malfunctions most often arise after the loss of grease in them, which, by the way, each manufacturer is noteworthy.

The fact is that the design of the trimmer gearbox body is not completely tight. Otherwise, its cost will increase strongly. Gears should always work in lubrication, and it is consumed. If it is not replenished, then the breakdowns are inevitable, which happens quite often.

In cheaper structures without a gearbox, a coil of the coil is fixed through a plastic sleeve to the shaft. During constant loads, plastic heats, and the sleeve wears out during operation, the head begins to hang out.

When the critical value of the backlash is reached, the sleeve must be replaced.

Why can the lower part of the composite rod

The reason for increasing temperature in this place can only be strong friction of rotating parts about fixed parts. In other words. the spring shaft is tightly pressed against the walls of the plastic insert. (See above the photo of the details of the composite bar).

This leads to melting the plastic up to damage to the sleeve and the formation of a continuous lump from it, penetrating the boots of the shaft.

When cooling in the air, a monolithic structure is created, which can block rotation and even jam the engine.

The rotating spring shaft of the bar should always work in the environment. It must be regularly lubricated.

Timely perform preventive examinations and work.

What is the overheating of the case

Owners of light trimmers often use their mowers at the limit of their capabilities, or even create unacceptable operating conditions for them. The result of such an attitude we have a burned.out electric motor and molten plastic of the case.

Such defects are not eliminated with their own hands and require a complete replacement, which is comparable at the price of buying a new unit.

Why is there increased vibration and how to get rid of it

We understand that any well.balanced part regarding the axis of rotation does not create vibration. Beats arise where the factory balance is broken or there is a marriage.

The mowing head has a fairly large mass. Therefore, it is often the cause of increased vibrations, but in each case it is necessary to study this issue on a specific design.

The owner of a short Masterlom video, Masterlom, shares his experience in eliminating such a defect on the Tekhmann DCE-2014B electrician. His achievements and ideas can be useful to you in eliminating vibrations. I recommend to see.

However, vibration can create the lack of lubrication on the spring shaft when rotating due to friction against the wall of the composite bar. Consider this question too.

Finishing the presentation of the material, I note that I tried to tell everything that I know about the repair of the electrimmer with my own hands. The experience of its operation exceeds five years.

If you have met other defects or you know more effective ways to eliminate them, then write in the Комментарии и мнения владельцев. Your knowledge will be useful to other readers of my electrician blog.