Hello everyone. This video is not educational. I don’t teach anyone how to assemble, repair and the rest. The situation has developed ...
VIDEO
Approximate management how to disassemble the trimmer to, for example, get to the starter or the ignition coil.
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 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 lie in 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.
The benzokos is one of the main tools of the summer resident, used to quickly put the land in order. Owners of private houses also purchase this tool for mowing grass in the backyard. The period of active use of petrol cutters and electric trimmers is in the summer. Before starting operation, the tool is put into working condition: rubbing parts are lubricated, the cutting attachment is changed, a fuel mixture is poured into the tank. If the engine does not start at all or stalls quickly, without gaining a sufficient number of revolutions, then you have to look for the causes of the malfunctions and eliminate the identified malfunctions. To repair a petrol brush with your own hands, you need to understand its structure and the principle of operation of the main units. This information can be found in the instructions for use, which the manufacturer applies to the garden equipment without fail. Check for such a guide when purchasing your chainsaw. The imported tool must be accompanied by instructions written in Russian.
A long tubular rod is attached to the gearbox of a two-stroke internal combustion engine. A shaft passes inside the rod, which transfers torque from the gasoline engine to the cutting mechanism. The line or knives rotate at 10,000 to 13,000 rpm. There are holes in the protective housing of the gearbox, into which grease is injected with a syringe. For the convenience of using the tool, the manufacturer equips it with a special adjustable shoulder strap.
A cutting attachment is attached to the brushcutters:
The line, which varies in thickness from 1.6 to 3 mm, is located in the trimmer head. The line is subject to wear during mowing. Changing the line is quick and easy in two ways: by winding a line of the same diameter onto a bobbin or by installing a new spool with line already wound.
Steel knives with double-sided sharpening for the benzokos for clearing the area from weeds, small bushes, hard grass. Knives differ in shape and the number of cutting surfaces.
On the U-shaped, D-shaped or T-shaped handle, which is attached to the boom, there are the petrol cutter control levers. The cutting mechanism is protected by a special casing. Household brushcutters are filled with a mixture prepared from gasoline and oil, which is poured into the fuel tank. The device of semi-professional and domestic brushcutters, equipped with a four-time gasoline engine, is slightly different. The filling scheme is also different: oil is poured into the crankcase, and gasoline is poured into the tank.
The measured piece of fishing line is folded so that one end is 15 cm longer than the second.We put the loop into the slot on the spool and start winding in the direction indicated by the arrow
If you cannot start the petrol cutter, then the first step is to check the presence of fuel in the tank and its quality.For refueling the tool, it is recommended to use high-quality gasoline purchased at gas stations, the grade of which should not be lower than AI-92. Saving on cheap fuel can lead to a breakdown of the cylinder-piston group, the repair of which can take a third of the cost of the brushcutter itself. It is equally important and correct to prepare the fuel mixture from gasoline and oil. The proportional ratio of these components of the mixture is indicated by the manufacturer in the manual. It is not necessary to prepare the fuel mixture in large volumes, since its properties are lost during long-term storage. Better to use a freshly prepared mixture.
When preparing the fuel mixture, pour oil into gasoline using a medical syringe, which allows you to accurately observe the required proportion of components
A dirty fuel filter in the tank can also prevent the brushcutter from operating. Therefore, if problems arise with starting the motor, check the condition of the filter. Replace the filter if necessary. Do not leave the inlet pipe without a fuel filter.
The air filter also needs to be checked. When contaminated, the part is removed, washed in gasoline in the field and put in place. In the country or at home, the filter can be washed in water using detergents. After that, the filter is rinsed, wrung out and dried. The dried filter is moistened with a small amount of oil used to prepare the fuel mixture. Excess oil is removed by squeezing the filter with your hands. Then the part is installed in place. The removed cover is put back and secured with screws.
The air filter, washed in a fuel mixture, wrung out and dried, is installed in place in a plastic case and closed with a lid.
You can see how this procedure is done in more detail in the video:
If all of the above procedures are carried out, and the engine does not start, then adjust its idle speed by tightening the carburetor screw. In the video posted at the beginning of the article, attention is paid to this issue.
Place the tool on its side with the air filter at the top. This arrangement of the chainsaw ensures that the fuel mixture hits the bottom of the carburetor. The engine will start on the first attempt if you remove the air filter and pour a few drops of the mixture into the carburetor before starting, then reinstall the dismantled parts. The method has been tested in practice.
If the first tip doesn't work, then the problem is most likely in the spark plug. In this case, unscrew the plug and check its functionality, and also dry the combustion chamber. Replace the candle that does not show signs of life with a new one.
If the spark plug is in good working order, the filters are clean and the fuel mixture is fresh, then you can use the universal method of starting the engine. Close the carburetor choke and pull the starter handle once. Then open the choke and pull the starter 2-3 more times. Repeat the procedure three to five times. The engine will definitely start.
Some pull the handle with such force that they have to repair the starter of the petrol cutter with their own hands. This is only possible if the cable breaks or the cable handle breaks. In other cases, it is recommended to replace the starter. This unit is sold assembled.
Stop the engine and wait for it to cool down.
Disconnect the high voltage wire from the spark plug.
Unscrew the part using a special wrench.
Inspect the spark plug for replacement. The part changes if it is faulty, heavily soiled, has a crack on the case.
Check the electrode gap. Its size should be 0.6 mm.
Tighten the new spark plug inserted into the engine with a wrench.
Install the high-voltage wire to the center electrode of the spark plug.
As you can see, there is nothing super complicated in this procedure.
A new spark plug for a two-stroke internal combustion engine of a gasoline streamer is installed to replace the old part that is out of order
After starting, the engine may stall if the carburetor is incorrectly tuned or misaligned. What are the signs that you can understand that the reason really lies in this? It is very simple, by the vibrations that will be clearly felt when the mower is running. You can adjust the fuel supply with your own hands by following everything that is written in the operating instructions for the tool.
The engine may stall due to a clogged fuel valve. The cause is eliminated by cleaning it. If the brushcutter starts up and then suddenly stalls, it means that the fuel supply to the carburetor is difficult. Loosen the carburetor valves to ensure that the correct amount of fuel can flow to it.
Excessive air intake can also stall the engine. Increase engine revs to allow air bubbles to escape faster from the unit's fuel system. Also, be sure to check the integrity of the fuel intake hose. If you find mechanical damage (cracks, punctures, etc.), replace the part.
During the period of operation of petrol cutters, monitor the condition of the engine cooling system. The channels in the starter housing and the cylinder fins must always be clean. If you ignore this requirement and continue to operate the brushcutter, you can damage the engine due to overheating.
Competent care of the gasoline scythe during operation allows you to use it for several seasons in a row without major repairs
Allow engine to cool before cleaning. Take a soft bristled brush and clean the outside of the dirt. Cleaning of plastic parts is carried out with solvents, including kerosene, or special detergents.
At the end of the summer season, the brushcutter must be prepared for long-term storage. For this, the fuel mixture is drained from the tank. The engine is then started to use up fuel residues in the carburetor. The entire tool is well cleaned of contamination and goes to "hibernation".
As you can see, it is possible to repair the faults of a household petrol cutter on your own. It is worth contacting service departments in case of serious breakdowns. In this case, the cost of repairs should be correlated with the price of a new petrol cutter. It may be more appropriate to buy a new instrument.
The workshop has everything you need to ensure quick, high quality repairs to your Patriot trimmers. Specialists provide recovery services for many common device models. These include PT533, PT557, PT535, PT545, PT443, PT527, PT547, PT535, PT545, PT555, PT415, PT453, PT270, PT2540, PT3045, PT3055, PT3155, PT3355, PT4355, PT3555, PT4555, and PT5555, T556 other.
On the territory of the workshop there is a specialized diagnostic equipment, there is a modern tool in stock. All this makes it possible to determine the cause of the malfunction as accurately as possible, thereby guaranteeing the effectiveness of the repair. The master will fix minor breakdowns in your presence. More complex ones requiring replacement of parts - within 3 days. Thanks to our own warehouse of spare parts, the terms of work are minimal.
Patriot petrol cutters are considered quite reliable, they rarely fail and, mainly, for two reasons. Contamination of the fuel system, usually after winter storage, the engine does not start or does not release gas, cleaning and adjustment help. The second main problem is the failure of the piston group; it is treated by replacing the rings or the CPG assembly. We can easily eliminate these and any other malfunctions.
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 soldered 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.
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.
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.
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 ... However, 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 finished, 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.
Take a piece of plywood or PCB and draw a circle about 14 cm in diameter on it.
Use a jigsaw or metal saw to cut the disc.
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.
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.
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.
VIDEO
Petrol trimmers are perfect for clearing backyard weeds, as well as making hay. Yes, as grandfather's "Lithuanian" they also proved to be irreplaceable assistants. What to do in this case, when gasoline broke trimmer?
Petrol trimmers are perfect for clearing backyard weeds, as well as making hay. The cable on the patriot petrol trimmer broke. Yes, as grandfather's "Lithuanian" they also proved to be irreplaceable assistants. There is just one problem: even the ancient braids had to be repaired after the season.
petrol trimmer ? Repair in a service center is not a cheap pleasure. Is there a chance to somehow rectify the situation on your own?
It is known that prevention is much preferable to treatment, and therefore do not forget to take care of the instrument so that it does not need repairs. First of all, every 15 minutes of operation, you need to give the device at least ten minutes of rest. In addition, you do not need to cut grass higher than that specified in the instruction manual.
What to do if the petrol trimmer still breaks down? DIY repair is a good option! Let's make a reservation right away that we will talk more about engine malfunctions, since almost everyone can repair a broken rod. The lawn mower box is broken. Trimmer petrol rt 4355 disassembly grease. In extreme cases, you can simply secure it with some kind of tire and clamps.
VIDEO
Correctness of setting carburetor determined by engine operation and by the color of the spark plug. Adjusted.
VIDEO
Brushcutter carburetors can be bought here: How to adjust carburetor if configured.
Is the candle wet? Completely "showered" with a petrol-oil mixture? Your petrol trimmer we are trying to repair has carburetor adjustment problems. Easy start petrol trimmer. This often happens when non-specialists have tried to tune it. If you have no experience, we strongly advise you to contact the service center, since by your actions you may well burn out the entire piston system.
However, not everything is so bad: if you violate the cold start rules, all the time trying to pump the fuel mixture, then this can easily lead to throwing.
It is a different matter when the candle is covered with a thick layer of black carbon. The bearing of the al ko lawn mower has broken. In this case petrol trimmer , the repair of which we are describing, was exposed to a poor-quality fuel mixture.Maybe the point is again in the wrong adjustment of the carburetor, which gives out a too saturated fuel mixture. The sterwins petrol lawn mower has broken drive. Just replace the candle.
Often, the lack of gasoline entering the combustion chamber is due to the fact that a lot of dirt has accumulated in the gas tank, which simply clogged the supply hose. Disconnect the fuel hose. If fuel does not flow from it, then a clogged fuel filter or breather is to blame. The latter can be cleaned with a needle, and it is advisable to completely change the former once every three months.
Among other things, the repair of petrol trimmers "Patriot »Often requires replacement of the air filter. When clogged, it prevents the formation of a normally rich fuel mixture.
Video (click to play).
And one more thing: often a muffler clogged with carbon deposits is to blame for everything. It must be dismantled, washed in kerosene or burned on a burner. This is especially done by those for whom the repair of Husqvarna petrol trimmers is a daily job.
