Trimmer repair is needed when the device does not cut in or does not work correctly. All owners of private houses and suburban areas are familiar with the problem of excess vegetation, which is sometimes difficult to get rid of. As is clear, progress does not stand in one place and new developments and useful inventions appear in all areas. This also affected agriculture. It is no longer necessary to mow the grass with old awkward devices, modern gas mowers have come to the rescue, which are able to get rid of vegetation in the most inaccessible places.
The petrol trimmer can cut grass even in cloudy weather. It is painfully simple to take care of the personal plot with the help of this unit, and at least some adult man will be able to cope with this occupation.
Regardless of their versatility, as well as no matter what technique, trimmers tend to break and fail.
Do-it-yourself trimmer repair implies the elimination of all problems that interfere with the normal operation of the unit. Among the most common are the following:
Engine CPG failure can occur due to poor fuel quality or wear of engine parts. As you know, the piston group is lubricated thanks to the oil that is added to the gasoline. In old oil, grease precipitates out, which makes the oil unusable. If you continue to try to start the trimmer, then you can ruin the engine in a matter of seconds, and this will entail additional costs for repairing the trimmer. This breakdown is considered the most expensive. To eliminate it, it is required to replace the piston group assembly, to be more precise, it may be necessary to replace the cylinder, rings, piston and oil seals. In such cases, it is unlikely that you will be able to do without additional help, if only you yourself are a master and know how to handle such a technique.
The video examines the most common breakdown of a petrol cutter and how to deal with it WORKS 100% CHECKED
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I beg your pardon for the quality of the video. There was a problem with the video editor. But I hope that you will
Repair petrol cutters with their hands can be exercised if it starts and idles, but then chokes when you try to increase the speed. To eliminate this damage, carburetor repair or cleaning of the muffler or gas filter is required. At first glance, everything is quite simple to solve, but if after you clean the clogged trimmer parts, it does not work, then additional diagnostics may be required.
If the trimmer motor cannot reach the desired speed, it is likely that the air filter is clogged or there is debris in the engine itself. The solution to the problem is clear right away - to clean the engine and filter, in some cases may need replacement filter.
In the process of work, most trimmer users are faced with constant noise. If you hear a characteristic knock, as if on metal, then it is likely that the engine is overheated in the trim tab or fuel does not pass. To eliminate this sound, you need to fill up with gasoline or turn off the mower for a short time.
Do not exhaust the unit: if it constantly works for wear and tear, then its service life is dreamed of several times. If a knock is felt in the engine itself, then the reason lies in a malfunction of the piston, piston ring, in a worn out cylinder or crankshaft bearing. In order for the knock to disappear, you need to replace the failed part in the trimmer.
To resume normal operation of the mower, there are 3 main components that need to be checked, namely:
sleeve;
output cup;
flexible or rigid shaft.
The gearbox is a very important component, therefore, the repair of the trimmer in this case should be carried out by an experienced craftsman, and so that such breakdowns do not happen in the future, the gearbox needs to be serviced accordingly.
In addition to the above breakdowns, other malfunctions occur, for example, the power button sinks or the limiter disappears from the mowing head. You can replace the power button with a soldering iron, and the stopper can be wound with copper wire. Have you noticed that the line is broken or run out? It is enough to buy a new skein of the same diameter fishing line and, having disassembled the drum, wind it around the bobbin.
If you want your mower to work for a long time and without interruptions, then it needs to be serviced constantly, you can contact service centers or carry out diagnostics yourself.
To do this, you need to constantly check the bushings. barbells and, if necessary, change them, the same applies to the candle.
It is constantly necessary to fill the gearbox with special lubricant, partially disassemble the motor part and clean it of accumulated dirt. In most cases, this trimmer maintenance is carried out according to a certain number of hours worked.
Now you are familiar with how to repair gasoline trimmers without additional help. But it is worth noting that if you are not confident in your knowledge and skills, it is better to leave this business to professionals.
The video describes the most common breakdown of a petrol cutter and how to deal with it WORKS 100% CHECKED.
In this video, I talk about one of the reasons for the wear of the drive shaft splines of the petrol trimmer, as well as about the river.
For even more information about repair and the choice of tools on our website, visit us, we are glad to everyone.
How to choose and buy a drive shaft for a trimmer. Rigid or flexible shaft of a boom, brushcutter gearbox or benz.
For even more information about repair and the choice of tools on our website, visit us, we are glad to everyone.
Powerful universal trimmer, semi-professional. Gasoline 2-stroke engine. Line diameter 2.4 mm. Diam.
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trimmer repair at low cost.
How to improve the sound on the ACTION CAMERA Replacing the microphone, etc.
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Took off the sequence of the bar assembly of the Dnipro-M BT-430 brushcutter.
This video was processed in YouTube Video Editor ()
Video about gearboxes on trimmers, lower gearbox and upper gearbox (bell), on how to understand how they differ.
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we repair the trimmer champion t 336.
Installation on a brushcutter Husqvarna 128R of a Chinese gearbox, a rod of 26 mm. and steel shaft 8 mm. Drive shaft 4 * 4.
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 and, as a result, breakage. 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:
The trimmer motor is not picking up speed;
Breakdown of the cylinder-piston group (CPG);
Ignition malfunctions;
There is no connection between the internal combustion engine and the trimmer head;
Mechanical knocking during unit operation.
Repair of CPG 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 diagnostics of the section, 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 common faults of the petrol mowers is the incorrect operation of the internal combustion engine, namely the drop in power with increasing speed (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.
How to fix a trimmer without the help of others
Trimmer repairs should be carried out as soon as possible at the first signs of breakage, so that minor malfunctions do not lead to more severe dilemmas. For all models, the presence of such main nodes and structural parts : drive system (motor), transmission devices, working part (knife or fishing line), belts and handles. Breakdown can occur in any part, but some units fail even more often than others.
Motor-cutters running on gasoline or electricity (as well as various models from different manufacturers) differ in design and in the nature of the problems. Some of them can be easily removed with your own hands, while others will require more than half a repair or an appeal to a service center.
The more frequent are breakdowns of the petrol cutter associated with such structural elements:
engine (namely, with a piston system);
carburetor;
barbell;
starter (rope breakage, breakage or spring disengagement);
with an ignition or fuel supply system;
transmission mechanism (reducer);
filters and a silencer.
The signs of defects are as follows:
the occurrence of unusual sounds during the operation of the brushcutter;
the petrol cutter does not cut in, does not pick up the required speed or stalls;
when the motor is running, the working part does not spin or slips;
gasoline leak;
excess heating of individual units.
Also, smaller breakdowns may occur, which are detected without any special diagnostics:
sinking of the start button;
falloff of the limiter;
line breakage or knife breakage (loss of sharpness).
Small faults are easy to fix. Repair of a gasoline trimmer in more difficult cases will require preparatory diagnostics to clarify the clear circumstances. If you have the proper knowledge and ability of plumbing, then problems can be eliminated without the help of others, replacing the failed parts.
To disassemble the petrol cutter for repair work, in general, the following devices will come in handy:
a set of screwdrivers (with different tips) and wrenches;
small puller for removing bearings;
special candle key;
hammer.
In each case, it is useful to disassemble the individual nodes.
It should be noted that the starter (launcher) in a number of models is non-separable - in this case, with dilemmas with it, only replacement element. If the assembly is disassembled, it can be repaired by removing and replacing the rope and spring, or reinstalling the latter (when it is disengaged).
It is quite often required to repair the trimmer bar. It is a structure of the following parts:
drive shaft made of steel with polyhedral or square splines at the upper and lower ends;aluminum tubes;
a plastic sleeve designed to maintain the centralized position of the drive shaft in the tube (so that there are no vibrations);
rubber shock absorber suitable for connection barbells with a motor;
steering wheel with a handle used for control and a rack, a belt.
In some models, there is a shock absorber between the control rack and the bar. Everything control elements (lock lever, ignition switch, gas button) are located on the handle.
A bevel angular gearbox is connected to the lower end of the boom, but some lightweight models are available without it. This is due to the fact that their bar has a curved shape, and the shaft is a flexible cable.
How to disassemble the bar and assemble it later for lubricating the shaft or replacing it is shown in detail in the video clip below. The same method is used to change the broken barbell to the newest one.
It often happens that polyhedral or square splines drive shaft "Lick", with all this, the working mechanism does not rotate or does it with a slip. Then the shaft is changed.
When arises knock on the phone , you should disassemble the rod and check the condition of the bushing, and, if necessary, replace it. How to correctly assemble the throttle on trimmer , discussed in the video below.
If the rod is not intact, applicable to the installation, then you can tighten the place of the break with a clamp or apply a kind of tire. Such a measure is temporary, therefore it follows according to the ability to quickly perform the substitution.
When a knife or fishing line, when the engine is idling, almost constantly turns, and uncharacteristic sounds emanate from the front of the engine, this indicates a breakdown of the clutch. A broken spring is a prerequisite. With all this, the technique mows normally.
If slipping occurs, then the pads have worn out in addition.
The trimmer clutch is repaired as follows:
remove the cover from the muffler;
remove the iron stand;
then remove the cylinder and starter caps to gain access to the clutch;
unscrew the side screws to remove the shock absorber cover;
remove the tube from it, having previously let loose the tightening bolts;
unwind the clutch (shown in the photo below);
VIDEO
The most powerful universal trimmer , semi-professional. Gasoline 2-stroke engine. Line diameter 2.4 mm. Diam.
VIDEO
Removed the assembly sequence barbells brushcutters Dnipro-M BT-430.
inspect the condition of the spring, pads and bearings;
the newest spring is hooked by threading the hooks into the proper holes;
to replace the pads, it is necessary to remove the spring, and then unscrew the bolts on them.
As needed lock the crankshaft using, for example, a rope.
Engine problems can be caused by misalignments with the piston system, oil seals, rings. To remove them, you need remove the drive motor .
Finding what exactly became the prerequisite for the breakdown is difficult. If there is a guarantee, the mechanism should be taken to a service center for diagnostics and repair. If it is not possible to turn to specialists for help, then it should be borne in mind that replacement of piston rings is most often required. To do this, it is useful to disassemble the engine, get the piston. Do this in the following sequence:
remove the cover of the plastic case by unscrewing the screws or wringing out the clamps;
disconnect the bar with the crankshaft;
remove the cylinder head;
take out the piston and rings;
if necessary, replace them;
assemble in reverse order.
Rings should be installed carefully because they are fragile.
How the piston is placed and what happens replacement of oil seals when repairing the engine, it is clearly shown in the videos below:
With regular use, the brushcutter can break down gear ... Gears and bearings wear out in it (they can also break). How to quickly repair the shaft on the bar trimmer and replace the coupling. To prevent this from happening often, this unit should be regularly lubricated. The frequency is almost always indicated in the operating instructions for the model used (at least once a season). The video below can serve as a repair manual.
To lubricate the gearbox , you should unscrew the plug and simply squeeze out a suitable lubricant inside the unit, turning the shaft.
The carburetor can only be removed and cleaned on your own, and the gasket between it and the engine can be replaced. The tightness of the assembly at home is quite problematic to determine. The main thing is to correctly assemble the equipment after repair so that the trimmer works without problems.
Electric trimmers differ from gasoline devices in a more simplified design. Conditionally electric scythe divided into mechanical and electrical part ... Accordingly, the same groups of problems that occur with this equipment are distinguished.
Most breakdowns cannot be visually detected. To do this, you need to use various devices. You can visually determine the following:
the integrity of the power cable is broken (the insulation has been torn from it, or it is clearly broken);
sinking or jamming of the start button;
external mechanical damage to the brushcutter;
problems with the cutting part;
stopping the spit when clogging with grass;
damage to the plug.
To find out which part is broken in other cases, you will need to disassemble the electric brace and consistently check the most likely options. At the same time, attention is paid to the external manifestations of deviations from the normal operation of the device. They help to establish the cause.
Repairing an electric trimmer will require the following devices and tools:
indicator screwdrivers;
multimeter or tester;
soldering iron;
a set of keys;
screwdrivers with different attachments.
Electric braids often do not work due to reasons not directly related to them, but caused by a decrease in the supply voltage in the network or an inoperative state of the outlet used.
Before disassembling and repairing electric scythe , you should check the condition of the outlet and the voltage in the network. If its value deviates from the norms specified in the operating instructions, then you should not even try to work with the device without stabilizer rated for the corresponding power. Otherwise, the motor may be damaged. Only after determining that the reason for the failure of the trimmer is directly related to it, you can begin to analyze the mechanism for repair purposes.
Dismantling the electric scythe in order to repair it electrical part is carried out in this sequence.
Place the trimmer on a flat surface (such as a table) that does not contain unnecessary items.
Unscrew the cover screws located on one side.
Remove the unscrewed half of the case, gaining access to the start button, electric motor, brush assembly, bearings, electrical connections (these elements are shown in the photo below).
Disassembled electric trimmer
The brush and bearing units are shown in the photo below.
The braid will work and without thermostat , you just need to constantly independently check the temperature of the electric motor, periodically letting it cool down. You can also install a new, similar sensor.
The start button of the electric motor can be checked by closing a jumper of its contacts ... If the trimmer works, then the problem is clear. But this option is not safe. Everything should be done carefully so as not to get an electric shock. To change the button, use a screwdriver to remove it from the seat and connect the wires from the old to the new one. After replacement, you need to assemble the electric brace, and then check its performance.
Replacing brushes required if they have collapsed. In this case, pull out the old ones from the grooves, and install the new ones in their place.
The connection terminals on different trimmer models are almost identical, so the connection and disconnection of the wires is the same.
Bearing replacement is a rather difficult operation, because it can stick and not be removed from the motor shaft. Pull or knock it down carefully to avoid damaging the rotor or seat.
Bearing for trimmer ET1003A
When the trimmer motor fails and needs to be replaced with a new one, carefully remove the fan and bearings and then reinstall them. In terms of costs, replacement is almost comparable to purchasing a new mechanism. In the absence of experience with electric motors, it is better to entrust it to specialists.
Instructions for assembling the electric part of the brushcutter are as follows:
install the engine by tightening the mounting screws;
connect the electrical circuit;
lay the wires neatly between the separate compartments into the existing recesses;
close the top cover by snapping the locks and screwing it in.
After assembly, the operability of the device is checked.
There are a lot of possible breakdowns for gasoline and electric trimmers. For the device to work for a long time, it must be kept clean and dry. An important point is carrying out regular preventive measures (e.g. lubrication of the gearbox) and the observance of the operating rules set forth in the instructions for the device. Purchase equipment of better quality from well-known manufacturers.
When disassembling the mechanism, it is recommended to photograph the process in stages so as not to forget anything, and not to miss a single detail during assembly. When replacing parts, pay attention to the selection 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 for transportation.
Modern technologies and equipment make it possible to produce the best and optimal technical solutions that become effective assistants in the arrangement of a summer cottage or a personal plot. The green lawn and other plantings can grow rapidly, a petrol cutter is used to tidy up the local area and mow the lawns, which is also called a brushcutter or trimmer, a petrol mower.
Traditional braids are inconvenient and unsafe to use, require a significant investment of time and effort, which will help save gas mowers, combining functionality and practicality in their design. In the photo of the petrol brush, you can see various high-tech devices, which are inherent in a set of operational characteristics, including such parameters as increased productivity and a long service life.
A convenient and reliable trimmer is a technical device consisting of individual mechanisms, parts and elements that can wear out, become unusable and damaged during intensive use.
Even with regular technical inspection, maintenance procedures and careful storage, such devices and their individual parts require repair and even replacement, all repair procedures can be performed independently.
Brief content of the article:
The easiest way is to give the petrol cutter for repairs, having allocated a certain amount of funds from the family budget, prompt and high-quality repair with your own hands is no less simple and convenient if you want to understand the design of the petrol cutter and fix all the problems.
The mass and piece production of trimmers is based on the use of generally accepted technology, a typical design scheme consists of certain elements and parts, it is important to know them when carrying out independent repair work:
top part. The basis of the entire structure, where all important elements are collected, such as a starter, a carburetor and a petrol cutter engine;
middle part. A hollow rod, inside it is a cable that connects the motor and the gearbox, which drives the cutting line. In this part, there are fasteners for distributing the weight of the entire structure and a belt for fixing the trimmer on the belt of a person using the trimmer for its intended purpose;
Bottom part. It houses the gearbox and cutting elements, which are hidden under a practical cover to protect the user. The casing provides an increased level of safety, preventing large fractions of debris, stones and glass from entering a person while working with a petrol cutter.
Knowing exactly the internal structure and the principle of operation of the trimmer, you can independently carry out repair measures for the structure or replace individual components that have become unusable, using the repair instructions.
The most common and common failures of the unit that need to be corrected on their own include the following problems:
engine malfunction, due to which the brushcutter does not start and does not work;
increased vibration of the brushcutter bar, which complicates its intended use;
increased overheating of the gearbox, its accelerated heating during operation;
slow and weak functioning of the cutting line at insufficient speed;
clogging of the starter grille, causing overheating of the engine and its refusal to work;
fast and frequent clogging of the carburetor due to the use of low-quality fuel;
clogging of the air filter due to non-observance of the measures for the care of the device.
All these problems can lead to the fact that the device will lose its working capacity. Before ordering the necessary spare parts for the mowing, a visual inspection and diagnostics of the device should be carried out.
Particular attention should be paid to individual spare parts and units of the device, to check them you will not have to contact a professional master, a set of diagnostic measures will help you to identify the consequence of a loss of performance with your own hands.
If the trimmer motor does not start or stalls immediately after starting, when the gearbox overheats or during the operation of the device, extraneous noises are heard and vibration is clearly felt, it is important to visually inspect and identify a non-working unit.
To optimize the preparatory measures before repairs, you should carry out a simple diagnosis and check step by step:
the presence of fuel in the tank and lubrication in the main units;
serviceability of the spark plug and its performance;
the cleanliness of the fuel and air filter of the brushcutter;
clogging of the outlet channel and breather of the device;
the quality of the fuels and lubricants used.
To determine the functional performance of the petrol-cutter's ignition, it is necessary to determine whether the spark plug is working by testing the appearance of a spark when it comes into contact with the body of the functional device.
The spark plug itself can be replaced with a new one, having previously dried the candle channel, if necessary, the old element is also dried, cleaned with special devices and returned to its place.
In the process of inspecting the carburetor, it is worth paying attention to the possible leakage of the fuel used; in order to identify problems with the carburetor, the following measures must be taken:
purging the fuel hose to eliminate possible blockage of the element;
checking and replacing the gasket between the engine and the carburetor;
determination of tightness and maintenance of constant pressure in the unit.
If necessary, you can personally disassemble and thoroughly clean the unit using gasoline, the jet and channels are cleaned using compressed air.
The gearbox transmits torque from the motor shaft to the cutting tool, its gears during operation must be absolutely clean and always lubricated with special grease.
Carrying out a technical inspection on your own once a season will allow you to get rid of the need to repair the gearbox or replace it, with the purchase of an expensive new unit.
The starter is necessary to bring the trimmer into working condition, its diagnostics consists in checking the tension of the starter cord connected to the teeth of the starter coil, which are often destroyed during an abrupt start.
An inoperative starter in a petrol cutter cannot be repaired; it must be replaced with a working unit as part of a mandatory technical inspection or a set of repair measures.
Video (click to play).
Cutting elements require special attention and care, which must always be cleaned of dirt and cut grass after use. Regular inspection and thorough preparation of the device for operation will help to avoid costly and time-consuming repairs, and always be confident in the performance of the petrol brush.
