Trimmer electric Hyundai repair do it yourself

We all have to deal with the improvement of personal land plots - in the summer season and, of course, to give a beautiful view of the site:

- you can't do without a trimmer. The reasons for the breakdown of electric trimmers are strong vibrations during operation, which affects the various electrical connections of this appliance.

Before us is a photograph with the technical data of the electric trimmer. Trimmer repairs will be accompanied by personal photographs with detailed descriptions of the repair.

Line trimmer wiring diagram, simple, consisting of:

• potentiometer, motor control speed;
• capacitor

and directly the electric motor itself.

The cause of the malfunction at the beginning during a visual inspection was incomprehensible, the trimmer had to be completely disassembled to determine the true cause of the breakdown.

Let's start to disassemble the electric trimmer:

At the beginning, we disconnect the two connected trimmer halves, the control handle from the contact connection with the electric motor itself.

Two photographs photo # 2, photo # 3 show the sequence of disconnecting the electric motor from the control handle.

Next, we need to check, carry out diagnostics - photo # 4 control knobs. We disassemble this part and carry out diagnostics for individual electrical connections of photo # 5.

To check the electrical connections, we need a simple tool - an indicator screwdriver.

Photo # 6 shows the detachable pin connection from the control handle. To check the electrical circuit of the connections from the contacts of the plug photo №7 to the detachable contacts of the photo №6 - for this, you can short-circuit the plug with the fingers of your left hand and connect the plug with the tip of an indicator screwdriver alternately with the plug contacts.

If there is integrity, there is no break in photo No. 9 in the electrical connections, the indicator light of the indicator screwdriver will glow, that is, the electrical circuit is closed on the LED light of the indicator screwdriver.

Performing this diagnostics, it is also necessary to close the contact of the potentiometer of the push contact as shown in photo # 8.

We checked one half of the electric trimmer of the control handle, - the handle of the manual trimmer is in good condition and then we need to check the second half of the trimmer, consisting of an electric motor and a capacitor.

For such a check, we need a digital multimeter. You can also use a pointer multimeter or such a device as an ohmmeter - there is no difference at all.

We set the digital multimeter to the measurement range of the least resistance, connect the probes of the device to the socket of the detachable connection with the output contacts of the electric motor. The device in this example, photo # 10, shows one, - the display reading of the device means a break in the electric motor circuit.

It is necessary to further look at what could be the cause of the malfunction, and of course we will need to disassemble the two connected parts of the case, where the electric motor circuit is directly located.

First, let's check the collector motor. We connect the probes of the device to the contacts of the graphite brushes of photo No. 11, the display of the device shows the resistance as shown in the photo - 29 Ohm. The reading of the device means the integrity of the stator windings of the collector electric motor.

We look further, what could be the cause of the malfunction.We carry out diagnostics of wires, output contacts of a detachable connection from an electric motor with contacts of graphite brushes.

We grasp the two output contacts from the electric motor with the fingers of one hand and touch the contacts of the graphite brushes with the tip of an indicator screwdriver photo # 12, photo # 13.

And when checking these electrical sections, the cause of the trimmer malfunction is found.

In the contact connection of the wire of photo # 13 with a graphite brush, the contact is broken. Elimination of such a malfunction is not difficult at all. To do this, it is necessary to etch the contact connection with the wire and the contact connection with the graphite brush with soldering acid, photo # 14. Next, apply a small layer of tin with a soldering iron, photo # 15, and solder the wire with the contact of the graphite brush, photo # 16.

So, the cause of the malfunction of the "electric trimmer with line" has been identified and eliminated. As you have seen for yourself, such reasons may be minor breakdowns, which can be determined without any difficulty.

It remains for all of you friends to wish a successful repair in the elimination of malfunctions of various electrical equipment.

An indispensable tool for a modern summer resident or owner of a private house is a petrol cutter, which allows you to effectively and efficiently put the adjacent territory in order. The period of active use of brushcutters is in late spring until October. Modern units are equipped with powerful and durable internal combustion engines, reinforced transmission and main components. Despite this, physical wear, manufacturing defects or improper operation lead to failure of the trimmer. In order to repair the trimmer with your own hands, you must have at least basic knowledge in the field of technology and little experience in repairing it.

The main unit of any gasoline tool is the internal combustion engine (ICE), which, through various methods, transmits the torque to the actuator. In a modern petrol cutter, a duralumin rod (pipe) is used as a transmission element between the engine and the trimmer head, inside which the drive shaft is located.

Thanks to the high-revving engine, the line speed can reach 13 thousand revolutions per minute, depending on the manufacturer of the scythe. In order to exclude mechanical and thermal damage to the gearbox, a special hole is provided in its housing for the introduction of grease in the form of ointments. To make the headset easier for the owner during long-term work, all brushcutter models are equipped with a durable shoulder strap.

Regardless of the manufacturer, almost every model comes with a line and steel knives.

The cross-section of PVC trimmer line can vary from 1.5mm to 3.0mm.

Made of durable polymer, it is subject to intense wear and tear during mowing. Therefore, from time to time it is necessary to check the presence of a fishing line in the head and, if necessary, replace it. It is recommended that you purchase an extra bobbin to quickly replace it with a spool with no line.

ICE trimmers on the market today are equipped with a D-shaped, U-shaped or T-shaped handle, where the main controls of the unit are located. For example, in a braid with a U-shaped grip, the throttle key and stop / start toggle switch are located on the right grip. In the D-shaped version of the handle, the throttle control button is located directly on the rod.

Due to the presence of many components and parts, repairing a trimmer with your own hands means eliminating breakdowns that prevent its normal operation. It should be noted the most basic malfunctions of gasoline streamers:

1. The trimmer motor is not picking up speed;
2. Breakdown of the cylinder-piston group (CPG);
3. Ignition malfunctions;
4. There is no connection between the internal combustion engine and the trimmer head;
5. Mechanical knocking during unit operation.
6. Repair of the central piston group petrol cutters

The main unit of any internal combustion engine is a cylinder-piston group (CPG), which can fail due to wear of parts of parts or poor quality of the fuel mixture.

Lubrication of rubbing units in a petrol cutter is carried out by adding a certain proportion of oil to gasoline. This process can be disrupted due to old oil precipitating out. In this situation, when the trimmer is started, the motor overheats and in a matter of minutes the most expensive breakdown occurs. To eliminate the malfunction that has arisen, a complete replacement of the CPG will be required, namely: the piston, oil seals, cylinder and piston rings. If you are not an ICE repair technician and do not have experience working with technicians, then you will hardly be able to fix the engine without the help of a specialist. Details on the stages of piston trimmer repair can be found here.

If the ignition of the petrol mowers fails, the spark on the candle disappears and, as a result, the fuel mixture does not ignite.

Spit spark plug design

In this situation, it is quite important not to rush to replace the coil, since the cause of the breakdown may be the lack of contact in the switch on the control handle.

An important point when troubleshooting the trimmer ignition will be the section diagnostics, where the distance between the side and center electrodes should be 0.5-0.7 mm. In addition, it is necessary to pay attention to the steel O-ring on the spark plug, the loss of integrity or deformation of which can lead to etching of air from the combustion chamber and, as a result, reduce the power of the streamer.

Ignition flywheel with coil

If the replacement of the check of the electrical circuit, the spark plug and its contacts did not give positive results, then you should pay attention to the trimmer ignition module, namely the clearance with the flywheel. Regardless of the design features and the manufacturer of the brushcutter, the distance between the ignition coil and the flywheel should be no more and no less than 0.2 mm. To restore the optimal value of the gap, you will need to loosen the coil mounting bolts and set the trimmer ignition with a special measuring probe.

A clear sign of a malfunction of the engine power system is the absence of traces of the fuel mixture on the spark plug electrodes, which may be associated with the following defects:

Trimmer Fuel System Components

• due to a clogged hole in the gas tank, a vacuum is created, which prevents the normal flow of gasoline into the carburetor;
• due to the poor quality of the fuel and the ingress of foreign particles, the fuel filter installed in the tank is clogged;
• non-flow of the mixture into the combustion chamber as a result of a clogged carburetor.

You can quickly determine the cause of the malfunction by dismantling the fuel hose leading to the carburetor. If the fuel mixture flows out in a thin stream, then you should pay attention to the carburetor. If there is no jet, it is necessary to clean the breather with a thin needle (a small hole in the gas tank cap) or replace the fuel filter.

If fuel enters the carburetor, it must be cleaned or adjusted. Adjusting the carburetor trimmer means restoring optimal fuel mix.

Trimmer carburetor with adjustment screws

To do this, pay attention to three adjusting screws: maximum speed (H), minimum (L) and idle speed (LA). To start the adjustment, you need to fully tighten the screws H and L and loosen one turn each. Then we start the braid and let it warm up for 10 minutes to adjust the power system in operating mode. After warming up the internal combustion engine, press the gas supply button until it stops (12,000 rpm). We restore the idling mode by unscrewing the screw LA. As soon as the trimmer head starts rotating, tighten the screw until it stops.

One of the frequent faults of the petrol mowers is the incorrect operation of the internal combustion engine, namely the drop in power when the speed increases (the scythe stalls).

The reason for this is that the exhaust system is clogged with burnt oil particles. Often manufacturers make mufflers prefabricated and cleaning is quite simple. If the design of the spark arrester is non-separable, then it must be placed in water with detergents, and then dried with an ordinary or industrial hair dryer. Frequent clogging of the exhaust system indicates non-observance of the proportions of oil and gasoline.

A petrol or electric trimmer is the only solution for mowing grass in hard-to-reach places that a wheeled lawnmower cannot handle. As a cutting tool in trimmers, metal knives or a special fishing line are used, which is tucked into the trimmer coil. But, unfortunately, trimmer heads become unusable over time during operation. Some malfunctions can be eliminated by hand, and some require a complete replacement of the mowing head.

Trimmer mowing heads come in a variety of designs, both simple and complex. The picture below shows semi-automatic trimmer head from Husqvarna brushcutters (Husqvarna) disassembled.

This type of head is present in the complete set of most mowers and electric trimmers, such as Stihl (Calm), Patriot (Patriot), Champion (Champion), Bosch (Bosch), Huter (Hooter) and others. The device of the mowing head is quite simple. It includes the following details:

• mowing head base;
• button for semi-automatic cord feed;
• bobbin (spool) into which the fishing line is tucked;
• spring;
• eyes - through them the line comes out;
• trimmer head cover;
• fishing line (cord).

There are also simpler trim heads shown in the following photo.

All these attachments do not allow changing the length of the line in a semi-automatic mode (after pressing a button). If the cord breaks, you have to stop the mower and change it manually.

Electric trimmer and petrol cutter users often face a problem with a semi-automatic cutterhead. Coil malfunctions can be as follows:

• the line does not lengthen automatically;
• the cord spontaneously comes out of the reel.

If the line does not lengthen when you lightly hit the trimmer button on the ground, then the reasons for this may be the following.

Option 1 - a bite has occurred, i.e. clamping the cord between turns... This problem usually appears if the user has been winding the line on the reel unevenly, with intersecting turns, or winding it with insufficient tension. In the latter case, when the mowing head rotates at high speeds under the influence of centrifugal force, the cord begins to tighten, as a result of which inter-turn clamping of the fishing line is possible. To fix the problem, you will have to disassemble the coil on the trimmer and rewind the cord correctly, that is, in even turns with good tension.

Option 2 - too short ends protrude from the head... The line may not come out when hitting the ground if the ends sticking out of the head are not long enough (short). In this case, the centrifugal force is not enough to stretch the line. Therefore, it is required to stop the unit (turn off the engine or disconnect the electric trimmer from the mains) and pull out the line manually after pressing the button.

Option 3 - the line is brazed inside the mowing head... This causes the coil to lock and not spin when the button is pressed. Basically, this happens for several reasons: poor quality of the cord, overheating of the coil during prolonged operation of the unit, hitting the line against solid objects.

1. In the first case, third-party cord can be made of low-quality and low-melting materials that cannot withstand mechanical and thermal stress. Therefore, you should give preference to "branded" lines.
2. But, if you nevertheless purchased a fishing line of unknown quality, and it is often soldered during operation, then you can follow the example of some users who, after threading the cord into the reel, wet it either silicone grease (from a spray can), or mineral oil.This procedure greatly reduces the likelihood of the coils of the fishing line being soldered together.
3. Also, the line can be soldered if it hits a hard object (stone, fence, dry branch, etc.) during mowing. As a result, it stretches slightly and is pulled back into the head at high speed. From friction, the cord heats up, and its turns stick together. The only thing that can be done to eliminate this malfunction is to open the trimmer coil and rewind the line.

There are situations when the trimmer user notices very fast line consumption... At the same time, he never hit the ground with a button to lengthen the line. The reason that the line spontaneously lengthens, being cut on a special knife on the casing of the apparatus, may be no spring in the mowing head. Often, novice users of mowers, trying to load the line into the reel, forget to install the pressure spring in the head, or completely lose it when opening the lid, and in the future, do not even know about its existence.

Also, the line can be lengthened without using a button if the spring is loose. If checking the spring has confirmed this fact, then several washers must be placed under it in order to enhance its clamping properties.

Trimmer owners, mostly newbies, find themselves in confusion, bordering on panic, when the need arises to change the cutter or line in the reel. Very often, when trying to unscrew the mowing head, users simply render it unusable, not suspecting that it is unscrewing in the opposite direction.... To prevent this from happening, if you need to replace the tool, we recommend that you read the step-by-step instructions below.

Stop the brushcutter engine or power off the electric trimmer before threading the line into the spool to avoid injury from accidental starting rotation of the cutting tool.

Unscrew the attachment attached to the gear shaft... To do this, the shaft must be fixed by aligning the holes on the washer and on the axle, and inserting a metal rod or screwdriver into them.

Unscrew the attachment. You should be aware that the thread on the shaft is left-hand. Therefore, turn the trimmer coil to the right, that is, clockwise.

Disassemble the mowing head. Most often, the head cover is attached on latches... To remove it, you will need to sink these latches into the case, squeezing the edges of the cover. If your trimmer has a semi-automatic mowing head with a button on the bottom, then the disassembly of the attachment should be done carefully, since you can lose the spring, which sometimes flies out when the cover is removed.

Cut off the required amount of line. Usually its length is 5 meters. Use a cord of the same diameter as indicated in the instructions for the tool. It is not recommended to exceed the maximum line diameter as this will result in increased engine load and higher gas mileage.

Find the midpoint of the line by folding it in half. This will create a loop.

Coils are cut inside special grooves (there may be holes). Insert a loop of line into this groove.

Wind the line around the spool by turning it counterclockwise. It is necessary to fill in the cord as evenly as possible, the turns should lie down without overlap and with good tension. When the winding is complete, leave free ends of the line about 20 cm long and fix them in the grooves on the sides of the reel.

Assemble the mowing head. Before you finally assemble the attachment, be sure to insert spring and washer (if available). Place the spool in the body and thread the ends of the cord through the holes or lugs.

Put on the cover and secure it with the latches.

Screw the adapter back onto the gearbox shaft, also securing it with a screwdriver. You will need to twist the trimmer coil to the left (counter-clockwise).

There are a large number of trimmer heads (not automatic) on sale, which are of low price and good quality. But sometimes situations arise, for example, in the country, when the trimmer coil has broken down and it is impossible to repair it, the store is far away, but it is necessary to mow. In this case, you can quickly, literally in a few minutes, make a simple trimmer attachment for fixing the fishing line from ordinary plywood with a thickness of 10-12 mm.

1. Take a piece of plywood or PCB and draw a circle about 14 cm in diameter on it.
2. Use a jigsaw or metal saw to cut the disc.
3. Drill a hole in the center of the disc that matches the diameter of the gearbox shaft. Do not forget to put a washer on it before installing the disc on the shaft.
4. Small corners can be screwed on the edges of the disc or 1-2 holes can be made on opposite sides. They will serve for refueling the fishing line in them.
5. Several screws can be screwed into the plywood to secure the line.

This homemade mowing attachment is attached to the shaft. with a nut... It will not work to tighten or unscrew the nut without fixing the shaft. To replace the cord, it will be enough to loosen the screws, insert a piece of line of the required length and press it down again.

Also, a mowing attachment for attaching a fishing line to it can be made from a metal sheet. How to do this can be understood from the following video.

Any complex technical equipment has a limited working life. And with an increase in the intensity of its operation, the risk of its failure increases. However, it is within the power of each owner to reduce the number of such emergencies if the rules for use and maintenance recommended by the manufacturer are followed exactly. In any case, you should be prepared for the fact that at a certain period, malfunctions in the operation of the device will still arise. Malfunctions that can occur in the trimmer operation can be of a different nature. However, in some cases it is quite possible to repair the trimmer on your own.

Equipment that operates on mains differs from similar devices that provide a built-in power drive in that it has a simpler design. The main elements of a trimmer are the following:

• mechanical part that transmits torque to the trimmer head;
• electric motor;
• power cable.

In this case, all the problems that may arise with this equipment can be presented in the form of the following groups.

Main function when using the device assigned to the trimmer head, in which the cutting surface is made of fishing line. In most cases, the device fails due to problems with its supply.

• If the line is used up, it is necessary, following the instructions of the instructions, to wind a new one.
• Line entanglement may be one reason for work stoppages. In a similar situation you need to unwind it and insert a new bobbin if it shows signs of damage.
• Also, the trimmer may fail due to stuck nylon thread, which may be due to overheating of the device during its long-term use. This problem is solved by rewinding the line.
• Malfunctions can be directly related to the coil: for example, the bottom of it may fall off. Repair in this case will be reduced to replacing it or creating a new bottom with your own hands. Having chosen the last option, it is necessary to prepare a piece of PCB or a bolt with a nut.
• In some cases, the coil may not show signs of damage, the motor may also be fine, but the head does not rotate. In a similar situation, you should look at the drive shaft. If the fear of its breakage is confirmed, then the device must be handed over to a service center.

If the failure of the gasoline trimmer is associated with malfunctions in the mechanical part, then the repair technology will for the most part repeat the work carried out in relation to electric models.