The lawn mower is one of the main tools of the summer resident, used to quickly bring land plot in order. Purchase this implement for mowing grass on household territory and owners of private houses. Period active use lawn mowers and electric trimmers account for summer period. Before starting operation, the tool is put into working condition: rubbing parts are lubricated, the cutting set is changed, the 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 carry out repairs of lawn mowers with your own hands, you need to understand its structure and the principle of operation of the main components. This information can be found in the operating instructions, which the manufacturer applies to garden equipment without fail. Check for such a manual when buying a chainsaw. An imported tool must be accompanied by an instruction written in Russian.
A long tubular rod is attached to the gearbox of a two-stroke internal combustion engine. A shaft passes inside the bar, transmitting torque from the gasoline engine to the cutting mechanism. The fishing line or knives rotate at a frequency of 10,000 to 13,000 rpm. In the protective case of the gearbox, there are holes into which grease is injected using a syringe. For ease of use of the tool, the manufacturer equips it with a special adjustable shoulder strap.
The cutting set is attached to the lawn mowers:
On the U-shaped, D-shaped or T-shaped handle attached to the bar, there are control levers for the brushcutter. The cutting mechanism is protected by a special casing. Household lawn mowers are refueled with a mixture prepared from gasoline and oil, which is poured into the fuel tank. The device of semi-professional and household lawn mowers equipped with a fourfold gasoline engine is slightly different. The refueling 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 reel and start winding it in the direction indicated by the arrow
If it is not possible to start a lawn mower, then the first thing to do is to check the presence of fuel in the tank and its quality. To refuel the tool, it is recommended to use high-quality gasoline purchased at gas stations, the brand of which must be at least 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 lawn mower itself. Equally important and correctly prepare the fuel mixture of gasoline and oil. The proportional ratio of these components of the mixture is indicated by the manufacturer in the manual. Do not prepare the fuel mixture in large volumes, as long-term storage loses its properties. It is better to use a freshly prepared mixture.
When preparing the fuel mixture, pour the oil into gasoline using a medical syringe, which allows you to accurately maintain the required proportion of components
A clogged fuel filter in the tank can also interfere with the engine of the lawn mower. Therefore, if you have problems starting the engine, check the condition of the filter. Replace the filter if necessary. It is forbidden to 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 a small amount oil used to prepare the fuel mixture. Excess oil is removed by squeezing the filter with your hands. The part is then put into place. The removed cover is put back and fixed with screws.
The air filter, washed in the fuel mixture, wrung out and dried, is put in place in a plastic case and closed with a lid
How this procedure is done in more detail you can see on 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.
So, in order:
Some pull the handle with such force that they have to repair the starter of the lawn mower 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 as a set.
The order of work is as follows:
As you can see, there is nothing super complicated in this procedure.
New spark plug for two-stroke internal combustion engine petrol spit installed to replace an old part that failed
After starting, the engine may stall if the carburetor is incorrectly adjusted or misaligned. By what signs can one understand that the reason really lies in this? Very simply, by the vibrations that will be clearly felt during the operation of the lawnmower. You can adjust the fuel supply with your own hands by doing everything that is written in the instruction manual for the tool.
The engine may stall due to a clogged fuel valve. The cause is eliminated by cleaning it. If the lawn mower starts up, and then abruptly stalls, it means that the fuel supply to the carburetor is difficult. Loosen the carburetor valves to ensure that fuel flows freely to it in the right amount.
Too much air can also stall the engine. Increase the engine speed so that air bubbles exit the unit's fuel system more quickly. Also be sure to check the integrity of the fuel intake hose. If mechanical damage is found (cracks, punctures, etc.), replace the part.
During the operation of the lawn mower, monitor the condition of the engine cooling system. The channels in the starter housing, as well as the cylinder ribs, must always be kept clean. If you ignore this requirement and continue to operate the lawn mower, you can disable the engine due to overheating.
Competent care of a gasoline scythe during the period of operation allows you to use it for several seasons in a row without major repairs.
Allow the engine to cool before cleaning. Take a soft bristle brush and clean off the dirt outer surface. Cleaning of plastic parts is carried out with solvents, including kerosene, or special detergents.
At the end of the summer season, the lawn mower should be prepared for long-term storage. To do this, the fuel mixture is drained from the tank. Then the engine is started in order to develop the remaining fuel in the carburetor. The entire tool is well cleaned of dirt and sent to "hibernation".
As you can see, it is quite possible to repair malfunctions of household lawn mowers on your own. IN service departments worth contacting in case of serious damage. In this case, the cost of repairs should be correlated with the price of a new lawn mower. It might be better to buy a new instrument.
Repair of trimmers should be carried out as soon as possible at the first signs of failure, so that minor malfunctions do not lead to more serious problems. All models are characterized by the presence of such main nodes and structural elements : drive system (motor), transmission devices, working part (knife or fishing line), belts and handles. Breakdown can occur in any part, but some nodes fail much more often than others.
Gas-powered or electric lawn mowers (like different models from different manufacturers) differ in design and the nature of the malfunctions. Some of them can be easily eliminated with your own hands, while others will require more overhaul or contacting a service center.
The most common are breakdowns of lawn mowers associated with such structural elements:
The symptoms of malfunctions are as follows:
Smaller breakdowns can also occur, which are detected without any special diagnostics:
Fixing minor problems is easy. Petrol trimmer repair in more difficult cases will require preliminary diagnosis to find out the exact reasons. If you have the appropriate knowledge and skills of plumbing work, then problems can be fixed on your own by replacing failed parts.
To disassemble the lawn mower for carrying out repair work In general, you will need the following devices:
In each case, you will need to disassemble individual nodes.
It should be borne in mind that the starter (starter) in a number of models is non-separable - in this case, in case of problems with it, only the replacement of the element is possible. If the knot is disassembled, then it can be repaired by removing and replacing the rope and spring, or by installing the latter in place (when it disengages).
Quite often, it is required to repair the trimmer bar. It is a structure of the following parts:
Some models have a shock absorber between the steering column and the stem. All control elements(lock lever, ignition switch, throttle button) are located on the handle.
A bevel-bevel gearbox is connected to the lower end of the rod, but some lightweight models are available without it. This is due to the fact that their rod has a curved shape, and the shaft is a flexible cable.
How to disassemble the rod and then assemble it to lubricate the shaft or replace it, is shown in detail in the video below. In the same way, a broken bar is replaced with a new one.
It often happens that the multi-faceted or square splines of the drive shaft “lick off”, while the working mechanism does not rotate or does it with slippage. Then the shaft is changed.
When it appears knocking on the tube, you should disassemble the rod and check the condition of the bushing, and if necessary, replace it. How to properly assemble the throttle on the trimmer is discussed in the video below.
If there is no whole rod suitable for installation, then you can tighten the fracture site with a clamp or apply a semblance of a tire. This is a temporary measure and should be replaced as soon as possible.
When a knife or fishing line, when the engine is idling, is almost constantly spinning, and uncharacteristic sounds come from the front of the engine, this indicates a breakdown of the clutch. The cause is a broken spring. At the same time, the technique mows normally.
If slippage occurs, then the pads are also worn out.
The trimmer clutch is repaired as follows:
If necessary lock the crankshaft using, for example, a rope.
Engine problems can be caused by problems with the piston system, seals, rings. To eliminate them, you need remove drive motor.
Determining what exactly caused the breakdown is not easy. 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, you need to disassemble the engine, get the piston. Do it in the following sequence:
Rings should be installed carefully, because they are quite fragile.
How the piston is placed and happens oil seal replacement when repairing the engine, clearly shown in the videos below:
With regular use, lawn mowers can break gear. Gears, bearings wear out in it (they can also break). To keep this from happening infrequently, this assembly should be lubricated regularly. The frequency is almost always indicated in the operating instructions for the model used (at least once per season). The video below can serve as a repair guide.
To lubricate the gearbox, you should unscrew the plug and simply squeeze out a suitable lubricant inside the assembly by scrolling the shaft.
On your own, the carburetor can only be removed and cleaned, as well as replacing the gasket between it and the engine. The tightness of the node at home is quite problematic to determine. The main thing is to properly assemble the equipment after repair so that the trimmer works without problems.
Electric trimmers differ from gasoline devices in a more simplified design. Conventionally, the electric braid is divided into mechanical and electrical part. Accordingly, the same groups of problems that occur with this equipment are distinguished.
Most damage cannot be visually detected. To do this, you will need to use various devices. Visually, you can determine the following:
To find out which part broke down in other cases, you will need to disassemble the electric scythe and sequentially check the most likely options. At the same time, attention is paid to external manifestations of deviations from the normal operation of the device. They help determine the cause.
Repair electric trimmer will require the following devices and tools:
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 the inoperative state of the outlet used.
Before disassembling and repairing an 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 instruction manual, then you should not even try to operate the device without stabilizer for the corresponding power. Otherwise, the motor may be damaged. Only after it is determined that the cause of the failure of the trimmer is directly related to it, can one begin to disassemble the mechanism for repair purposes.
Dismantling the electric scythe for the purpose of repairing its electrical part is carried out in the following sequence.
Brush and bearing assemblies are shown in the photo below.
The braid will work and without thermostat, only you will 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 motor start button can be checked by closing its contacts with a jumper. If the trimmer 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 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 scythe, and then check its performance.
Brush replacement required if they are destroyed. At the same time, it is enough to pull out the old ones from the grooves, and install the new ones in their place.
The connecting terminals on different models of trimmers are almost identical, so connecting and disconnecting wires is the same.
Bearing replacement is a rather complicated operation, because it can stick and not be removed from the motor shaft. It must be tightened or knocked down carefully so as not to damage the rotor or seat.
Bearing for trimmer ET1003A
When the trimmer motor fails and needs to be replaced with a new one, the fan and bearings should be carefully removed and then reinstalled. In terms of costs, the replacement is almost comparable to the acquisition of a new mechanism. It is better to entrust its implementation in the absence of experience with electric motors to specialists.
The instructions for assembling the electrical part of the lawn mower are as follows:
After assembly, check the performance of the device.
There are a lot of possible breakdowns in gasoline and electric trimmers. In order for the device to work for a long time, it should be kept clean and in a dry place. The important point is regular preventive measures (for example, lubricating the gearbox) and observing the operating rules set out in the instructions for the device. Get better technology High Quality from well-known manufacturers.
When disassembling the mechanism, it is recommended to take pictures of 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 choice of suitable accessories: it is better to use original spare parts.
For some models, the rod consists of two parts - a coupling is used to connect them. Such devices are convenient for transportation.
Trimmer repair is necessary when the device does not turn on or does not function properly. All owners of private houses and suburban areas are familiar with the problem of excessive vegetation, which is sometimes difficult to get rid of. As you know, progress does not stand in one place and new developments and useful inventions appear in all areas. This also affected agriculture. You no longer need to mow the grass with old inconvenient devices, modern gas mowers have come to the rescue, which are able to get rid of vegetation in the most inaccessible places.
With a petrol trimmer, you can mow the grass even during cloudy weather. look after personal plot using this unit is very simple, and any adult man can cope with this activity.
Despite their versatility, like any technique, trimmers tend to break and fail.
Not everyone can do the repair of a lawn mower with their own hands, because this requires the skills of repairing electrical appliances, but today we will try to figure out how to start a trimmer without a starter and how you can generally debug its work with your own hands.
Do-it-yourself trimmer repair involves the elimination of all problems that interfere with the normal functioning 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 lubrication of the piston group is carried out thanks to the oil that is added to gasoline. In the old oil, the lubricant precipitates in the form of a precipitate, which makes the oil unusable. If you continue to try to start the trimmer, you can ruin the motor 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 seals. In such cases, it is unlikely that you can do without additional help, unless you yourself are a master and know how to handle such a technique.
Do-it-yourself repair of a lawn mower can be done if it starts and idles, but then chokes when you try to increase the speed of work. To eliminate this breakdown, it is necessary to repair the carburetor or clean the muffler or gas filter. At first glance, everything is quite simple to solve, but if, after you clean the clogged parts of the trimmer, it does not work, then additional diagnostics may be required.
The main sign that the ignition coil has failed and the trimmers need to be repaired is the absence of a spark on the candles. It is very important not to rush to replace the coil in this breakdown, in most cases the cause of the breakdown is the lack of contacts, in the switch button, which may have broken, or the problem is in the candle itself. It must be checked for sure, perhaps somewhere a current breaks through or there are gaps or soot.
If the trimmer motor cannot reach the desired speed, then it is likely that the air filter is clogged or there is debris in the engine itself. The solution to the problem is immediately clear - clean the engine and filter, in some cases it may be necessary to replace the filter.
In the process of work, most users of trimmers are faced with constant noise. If you hear a characteristic knock, as if on metal, then it is likely that the engine in the trimmer has overheated or fuel is not passing through. To eliminate this sound, you need to fill up with gasoline or turn off the mower briefly.
You should not exhaust the unit: if it constantly works for wear, then its service life is several times dreamed. If a knock is felt in the engine itself, then the reason lies in the malfunction of the piston, piston ring, in a worn cylinder or crankshaft bearing. To make the knock disappear, you need to replace the failed part in the trimmer.
Sometimes it happens that the motor in the trimmer works normally, but at the same time the output shaft rotates very little or does not rotate at all. This is displayed in the fact that when the trimmer touches the grass, it stops working altogether and turns off.
To resume normal operation of the mower, it is necessary to check 3 main components, namely:
The gearbox is a very important component, so trimmer repair in this case should be carried out an experienced craftsman, and in order to avoid such breakdowns in the future, the gearbox needs to be properly serviced.
In addition to the above breakdowns, other failures also 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 limiter can be wound with copper wire. Have you noticed that the fishing line has broken or ended? It is enough to buy a new skein of the same diameter of fishing line and, having disassembled the drum, wind it on a bobbin.
If you want your mower to work for a long time and without interruption, then it needs to be maintained constantly, you can contact service centers or carry out diagnostics yourself.
To do this, you need to constantly check the rod bushings and change them if necessary, the same goes for candles.
It is constantly necessary to drive a special lubricant into the gearbox, partially disassemble the motor part and clean it of accumulated dirt. In most cases, such maintenance of the trimmer is carried out according to a certain number of hours worked.
Now you are a little familiar with how to carry out repairs petrol trimmers without any further help. But it is worth noting that if you are not confident in your knowledge and skills, it is better to leave this matter to professionals.
Trimmer failure:
Licked the edges on the trimmer drive shaft (had to buy a new shaft).
“Licked” because the splines of the shaft at the top are not engaged in their entire length (it happens that the shaft clings only a few millimeters at the end). At the bottom, the shaft enters the gearbox to its full length under its own weight.
At the first t.o. the trimmer must be checked and made so that the shaft enters the clutch at the top for the entire length of the splines (or edges, if there is a square). To do this, try to put the gearbox higher on the pipe, after loosening its fastening, or try to push the pipe deeper into the shock absorber, after loosening its fastening. If the splines of the shaft still do not enter the clutch to their full length, then it is necessary to shorten the pipe (cut off a part) to the length necessary for the splines to fully enter the clutch.
Warning: Just do not overdo it with cutting the pipe (it is better to cut smaller piece), since if the shaft turns out to be longer and it needs to be cut off, then when the shaft splines are heated, the metal will be released, i.e. hardened metal will become soft and will not last long (the shaft itself is made of alloy steel).
P.S. If the shaft has already been “licked”, then simply turn it over - install the shaft with the top knocked down splines down into the gearbox and do what is described in Do-it-yourself trimmer repair.
Trimmer failure:
Where does the lubricant go from the trimmer gearbox (a Chinese trimmer, instead of a cork, I screwed a grease fitting and a syringe into the gearbox).
Cause of trimmer failure:
Solid oil under pressure pushed through the closed bearings of the gearbox. During operation, liquid hot grease driven by rapidly rotating bevel gears (in a small volume of the gearbox housing) “flies out” either into the driver cartridge if the rings of the closed bearing on the driven shaft are pressed, or up into the pipe body if the rings of the closed bearing on the drive shaft are pressed reducer.
Replace the bearings (or the entire gearbox) at service center and in the future use a special lubricant for the trimmer gearbox (for example, Husqvarna).
Advice: Chinese lawn mowers have a small hole for adding lubricant to the gearbox, so it will be more convenient to draw lubricant from a branded tube into a medical syringe (without a needle), and then add lubricant to the gearbox from it.
Husqvarna 333R for 3.5 seasons of active commercial operation (required replacement):
Note: I read somewhere that the time between failures of two-stroke engines is no more than 500 hours, and in 3.5 seasons I burned ~ 370 liters of gasoline, i.e. if 0.35 l. per hour, then the operating time is more than 1000 hours! The Husqvarna 333R trimmer is a very reliable trimmer.
Note: Please write in the comments what you think about this trimmer repair.
Trimmer failure: tell me how the gearbox on the trimmer is disassembled to replace the bearing (Husqvarna). And does he understand at all?
Answer: Husqvarna brushcutter gearbox can be disassembled to change parts such as bearings, bevel gear, housing (because the gearbox assembly for Husqvarna trimmer costs about $150.)
It is necessary to remove it by loosening the tightening bolts at the bottom, be sure to wash it (for example, with gasoline), then use round-nose pliers to bring the ends of the retaining spacer ring together (there are two of them on the gearbox) and pull out the bearings with a small puller. They should go easily, since the upper bearing is no longer pulled together by the body, and the drive shaft of the Husqvarna trimmer comes out from the lower one.
Trimmer failure: The spark plug twists with great difficulty.
Cause of malfunction: The thread in the spark plug hole of the cylinder is damaged due to the fact that the spark plug did not go along the thread when it was screwed into the cylinder, or sand got on the threaded part of the candle, or the thread was torn off by a large force on the key.
If the spark plug is not threaded deep, then you can drive the thread in the cylinder with a tap of the appropriate size, then screw in a new spark plug and tighten with a force of 32-33 N * m. If the candle does not turn, then everything is fine, but with subsequent twisting of the candle, you must be especially careful. If the candle has turned, you will have to install a futorka (repair sleeve). To do this, it is better to contact a workshop for the repair of chainsaws and gasoline trimmers. There is essential tool and qualified personnel to select and purchase (or manufacture) a suitable spark plug repair sleeve for your spark plug, then properly disassemble the engine, drill the spark plug hole to exactly the required diameter, cut the appropriate thread in the cylinder. Then rinse everything and blow off the chips, screw the candle into the sleeve, apply thread sealant or cold welding to the threads of the sleeve, screw the candle together with the sleeve into the prepared hole, dry it, assemble everything, start and adjust. Alternatively, replace the engine cylinder. Repairing a lawn mower with your own hands is similar to repairing a trimmer.
Advice: The main thing when installing a spark plug is to first turn the spark plug by a few turns BY HAND, and then take the key. If the candle went easily by hand, then it is installed correctly and it can be wrapped with a tool (candle wrench with a knob). If the candle does not want to be twisted by hand, it is not worth twisting it with a wrench, since the candle has not gone along the thread and the thread in the spark plug hole of the cylinder will inevitably be damaged, and an expensive repair of the trimmer engine will be needed.
Trimmer failure: A cold trimmer engine with a closed carburetor air damper starts almost normally, runs at high idle, when the engine heats up, unstable operation is observed, after which the trimmer engine stalls sharply. The malfunction of the lawn mower is the same as that of the trimmer.
Cause of malfunction: Air leak under the trimmer carburetor gasket due to loose carburetor mounting or frequent removal / installation of the carburetor.
Craft new gasket trimmer carburetor made of thin paronite (up to 0.8 mm thick) or thick cardboard. How to make a carburetor gasket: cut out a piece of thin paronite or thick cardboard a little larger than the future finished gasket, smear the seat on the cylinder or carburetor with oil or grease, carefully attach the prepared piece for the gasket so that it leaves a clear imprint from the grease (outline of the future gasket ). Then cut out the middle with a small sharp narrow chisel on a heavy metal lining (for example, an anvil), cut the holes with a special head from the set suitable diameter and trim the outside with scissors. As an option, attach paronite or cardboard to the seat of the cylinder, just do not move it, tap the edges with a mallet, and knock out the holes with a ball from the bearing, but there is a risk of damaging the edges. The first option is how to make a better carburetor gasket. Everything, the trimmer carburetor gasket is ready. Repairing a lawn mower with your own hands in this case is similar to repairing a trimmer.
Trimmer malfunction: Trimmer reducer - hum, rattle, squeak and other noises in the lower part of the trimmer, wedging when turning and shat of the driven shaft. The malfunction of the lawn mower is the same as that of the trimmer.
Cause of malfunction: The bearings of the trimmer gearbox failed due to overheating of the gearbox, lack of lubrication in the gearbox housing, hitting the trimmer knife against a stationary object, long-term (many years) active operation.
Replacing the bearings in the trimmer gearbox yourself (you need wrenches to remove the gearbox; round-nose pliers to remove the retaining rings and disassemble the gearbox; gasoline to wash all the insides for troubleshooting parts; new trimmer gearbox bearings to replace) or replace the gearbox bearings in the workshop. If only one bearing of the trimmer gearbox is destroyed, both bearings must be changed anyway. Or, as an option, replacing the trimmer gearbox assembly - select the gearbox according to the diameter of the pipe onto which it will be clamped and along the splines of the drive shaft (square, star, hexagon). Repairing a lawn mower with your own hands is similar to repairing a trimmer.
PS: After replacing the bearings in the trimmer gearbox or replacing the gearbox assembly, do not forget to fill the gearbox housing with grease (need good lubrication, e.g. Husqvarna) through a special hole in the gearbox housing from a tube of grease or from a syringe (without a needle) if the filling hole is very small.
Trimmer failure: The trimmer starter cord stopped returning to the starter housing when trying to start the engine. The malfunction of the lawn mower is the same as that of the trimmer.
Cause of malfunction: The end of the spring in the trimmer starter jumped out and jammed the pulley.
Disassemble the starter, drill a hole where there is a recess for fixing the end of the spring, thread the wire, insert the spring, lay one turn, tie the wire thus fixing the popped end of the spring, lay all the turns of the spring, bend the end of the spring inward to engage with the groove on the other part. After that, lay the washer, spring, part with two antennae, tighten the central screw, insert the cord through the hole inside, tie the washer at the end to secure the end of the cord, lay the cord, check the operation of the starter and the return of the cord to the trimmer starter housing. Repairing a lawn mower with your own hands is similar to repairing a trimmer.
(depending on heat, dustiness and severity of work).
I wash the air filter after every 20 liters of gasoline with the engine and before doing repairs to the trimmer or maintenance of the trimmer.
To maintain the air filter, you must: remove the air filter foam element and wash it with soap in clean and warm water, wring it out and dry it (or replace it if the foam rubber filter element is old or damaged).
Note: The air filter can be “washed” more often to prevent a drop in power, increased fuel consumption, difficulty starting, and unnecessary wear on the lawn mower engine.
Note: If you adjust the trimmer carburetor with a dirty air filter, then after cleaning the air filter, more air will enter the engine and the fuel mixture will become much poorer, which will lead to bad job or even to engine breakdown and, as a result, trimmer repair.
1. Remove muffler cover- one bolt.
2. Turn the trimmer over on the table and remove metal pan(three screws).
3. Remove block starter(this is the air intake of the trimmer engine cooling system) - three screws and two rubber bands!
4. Unfasten the air filter cover and remove cylinder cover(she directs cold air per cylinder) - one bolt.
5. Unscrew the three bolts in air filter housing(one short and two long).
6. Carefully detach throttle cable from the carburetor.
7. Inspect while everything is dirty - the carburetor on the trimmer and its gaskets, hoses, tank, plug for fuel seepage (cracking and leaks).
8. Remove fuel tank with two hoses (disconnect with a screwdriver very carefully) and four support rubber bands (do not lose).
9. Remove carburetor Zama C1Q complete with air filter housing and gasket.
10. Remove with a screwdriver suction button(there for the subsequent installation it is necessary to make a mark).
11. Turning the carburetor on the trimmer, remove it from the choke rod on the body and then from the other rod.
12. In the new spark plug Champion RCJ6Y (for Husqvarna) set the gap to 0.5 mm.
Unscrew the old spark plug and install a new spark plug in the trimmer cylinder!
(the old candle - either immediately throw it away, or clean it, set the gap and cook to wash it to hide it in stock).
Note: Due to carbon deposits on the electrodes of the spark plug: there are interruptions in the operation of the engine (the trimmer engine troit), a drop in power occurs, and the engine may not start well.
Note: Carbon deposits on the spark plug electrodes are formed due to improper adjustment of the trimmer carburetor, if there is a lot of oil in gasoline and when the air filter on the trimmer is dirty.
13. Disconnect shock absorber cap(two side screws).
14. Disconnect barbell from the motor (three end bolts).
15. Shooting from the front clutch cover(three end bolts) and inspect the condition of the drum, bearing, clutch spring and weights (check for wear). If necessary, have it replaced by a Husqvarna dealer, or disassembled for cleaning.
16. Detach throttle cable(in two places).
17. Detach from clip and stack spark plug wire and wires to the "jammer", and disconnect jammer wires on the trimmer motor.
18. Further disassembly is not recommended, as it will break factory setting ignition! (Let me remind you: our task is only T.O. and repair of the trimmer). Silencer and intake panel it is not recommended to remove it (just check the fasteners!) so as not to violate the tightness of the inlet / outlet and so that dirt does not get into the cylinder during washing.
19. Loosen one bolt and remove shock absorber from the pipe. Wipe the seat on the pipe dry. Remove shock absorber cap.
Note: I removed the spark-extinguishing mesh in the muffler to exclude possible overheating of the trimmer engine due to the mesh clogged with soot.
Safety precautions: Sparks can fly out of a muffler without a spark arrestor.
Caution!, do not work where dry hay, gasoline or other flammable materials.
20. Cook on T.O. and trimmer repair:
21. In order, wash with gasoline, blow (!) And wipe painted surfaces with a clean (!) rag, including bolts and rubber bands (there are 5 of them):
22. Repeat items 21 (selectively).
23. Wash your hands.
24. Inspect all wires and clean connections! (there are three of them?).
25. Split the trimmer's throttle handle in half, disconnect the gas cable, and use a pipette to drip oil into the cable casing from both sides of the casing, constantly moving the cable to lubricate it. Wipe and assemble the throttle.
Note: I would be grateful to everyone who expresses their opinion in the comments about T.O. and repair of a Husqvarna trimmer (or compare it with the repair of a trimmer of another brand).
An unpleasant situation when mowing grass occurs at the most inopportune moment: you need to work in a hurry, and the electric scythe is broken.
Required to complete urgent repair electric trimmer, the design of which at first glance is simple, but in fact there can be a lot of places of damage.
The article contains an overview typical breakdowns. Familiarity with it will help save time on troubleshooting and troubleshooting.
The trimmer device can be divided into two parts:
The electrician is built on the supply of voltage from the outlet to the collector motor, which performs rotary motion rotor.
Depending on the purpose of a particular model, this engine is located on top or bottom of the trimmer, equipped with various protections and governing bodies.
Powerful models are designed to quickly mow large areas, while medium and low-power models allow you to decoratively process lawns, cut shrubs, and form flower beds.
The mechanical part is made of a collapsible housing with a kinematic scheme that transfers the energy of rotation of the engine rotor to the working body of the mowing head.
Mechanics and electrics are closely interconnected: a breakdown anywhere leads to the removal of the trimmer from work. Let's consider these situations in more detail for the possibility of repair.
When the collector motor is switched on, the current passes in series through all half-windings of the stator and rotor through the brush mechanism.
Banal truth: voltage is supplied by turning on the switch from the contacts of the plug inserted into the socket.
However, my neighbor in the country managed to goof on this issue and invited me to look at the brushes of the disassembled trimmer motor in order to explain why it does not work.
When I asked about the voltage in the outlet, he confidently stated that. I asked to be shown, because I do not trust words in such matters.
He took the indicator, and showed that it glows from the socket contact. Then I asked to go to the extension plug and rearrange it by changing the sockets. At first, his surprise quickly passed: during the second check, the indicator light did not light up.
There was a break in one extension cord, which excluded the supply of voltage to a serviceable trimmer motor. There was no point in disassembling it and looking at the brushes.
Begin any electrical circuit check from the analysis of the health of the power circuits. This reduces the time for finding and eliminating defects.
The trouble for novice users is that they do not fully understand the role of temperature in the operation of the collector, and indeed of any electric motor.
Electric current passes well through cold or overheated winding wires and normally creates a magnetic field that rotates the rotor. And the insulation lacquer, and other surrounding materials, melt and flow as the temperature rises.
The photo shows a trimmer cover body deformed from high heat and a failed engine.
Below is a photo of the burnt insulation of the stator and rotor windings, which are baked into a single lump.
It is not economically viable to repair such breakdowns. Replacing a burned-out engine in a repair shop is slightly inferior in price to buying a new trimmer in a store.
During operation, it is necessary to monitor the heating of the case.
This requirement is especially relevant for low-power models with a lower engine location. They are intended for short-term work on mowing lawns with low grass: they have a simplified design and are not equipped with overheating protection.
Electric trimmers of the middle class and above are equipped with a protective thermal switch. When the critical temperature is reached, it breaks the flow chain with its bimetallic contact. electric current, and after cooling - restores.
On my trimmer, it began to work falsely: I had to block contacts. Describe this case. In the same place, he showed in detail the sequence of disassembling the engine with photographs. Get to know the technology.
With the shunted contacts of the thermal relay, the trimmer worked until the end of the season. During mowing, I periodically checked the body temperature with my hand, took breaks. During the winter I found a new thermal relay, replaced the old one. After that I work with thermal protection.
Since ancient times at the institute, I remember the phrase of the teacher of the department of strength of materials and the theory of shell strength about the reliability of the design of any mechanism: all equipment is designed and created to work with optimal conditions with an acceptable safety factor.
You can’t underestimate it: they will frequent breakdowns, and it is not economically profitable to overestimate: the cost increases sharply.
I made this introduction in order to emphasize that the operating conditions indicated by the plant must be studied and strictly observed. Otherwise, breakdowns are inevitable: you will need to repair the electric trimmer.
What do the "newly innovators" do to facilitate their work:
Thick line really cuts better tall grass, but it also creates an increased load on the engine. Overheating does not occur immediately, but after a certain period of time.
The length of the rotating pieces of fishing line affects not only the width of the swath, but also the operation of the engine. This is especially felt by ear on the rotor speed. The release of a longer fishing line and the absence of protective case cutting knife - a prerequisite for overheating of the windings. 
For the same reason, it is unacceptable to violate the design of the cutting elements of the mowing head.
If there is a need to refine some elements contrary to the requirements of the factory documentation, then carefully take technical solution, calculate all possible consequences.
I did this when making a homemade extension cord for my electric trimmer,
Here is another example of a gross violation of input mounting electric cable into the body of the trimmer: blocking the shock-absorbing protective sleeve instead of replacing a damaged one.
Such a rigid fastening will not work for a long time: in a place tightened with clamps, the power cord will be constantly subjected to increased bending, which will lead to rapid damage or breakage of the metal core, violation of its insulation layer.
After opening the case, it is necessary to inspect all wires and parts, paying attention to contact connections and insulation integrity.
The operation of the control buttons is checked not only by mechanical pressing, but also
It is necessary to clearly determine the moment of change in the resistance value when switching with a button and make sure that the springs of the return mechanism work.
On the engine, they inspect the condition of the brush mechanism, check its operation. Pay attention to the cleanliness and condition of the surface of the collector plates.
It is important to carefully examine the condition of the collector motor windings, evaluate the operation of the bearings by hand to rotate the rotor in the stator, and the absence of transverse backlash.
Do not apply mains voltage to wiring diagram with the body disassembled. Functional testing should only be carried out after the engine has been completely reassembled.
The transmission of rotation from the electric trimmer to the mowing head is carried out in the same way as for models with an internal combustion engine: a solid shaft operates inside the rectangular section of the bar, and a cable operates at the curved section.
Their length, diameter and design are selected by the manufacturer for the specific dimensions of the composite rod.
It is made with an adapter with a screw clamp.
The large head of the screw is made for the convenience of adjusting the position of the mowing body at the bottom of the bar. The angle of rotation is selected individually.
It is convenient for me to set it so that the longitudinal axis of the protective casing and the axes of the electric motor are located in the same plane.
In this place, a malfunction can sometimes occur due to the transmission of torque from the direct shaft to the cable. It is manifested by the fact that the trimmer works normally at idle speed of the engine, and already under a small load the mowing head stops rotating.
The way to eliminate it was well shown by the owner of the video "Electric trimmer repair" Roman Shapkov. I recommend to look.
On my trimmer, an adapter is riveted from the bottom of the bar, into which the protective cover mounting bolt is screwed.
The output shaft of the rotating cable has a hexagon at the end. A plastic mowing head is put on it.
From the inside, a return spring is inserted into it to automatically reset the fishing line when mowing.
It has a spool on it. It is screwed on top with a fixing nut.
The device of the mowing head with a fishing line is quite simple.
However, all plastic parts do not have high strength and are subject to wear. Their working surfaces are erased. After three seasons of work on my trimmer, the exit holes of the fishing line from the mowing head have expanded, the thickness of the fixing nut has decreased.
It is difficult to apply protective measures to wear, and the easiest way to repair these parts is to completely replace the head. It is easy to buy: you just need to know the exact dimensions of the hexagon and evaluate the new design for performance.
Among the frequent malfunctions of the trimmer reel, there are cases when the fishing line is over or simply tangled due to improper winding on the spool. Eliminating them is not difficult.
But in practice, I met with another defect in the fishing line, which was sold in the state trading network from the Moscow company Patriot LLC. Her appearance in the original packaging.
As I understand it, it is specially hidden in a sealed bag: you can’t touch it when buying.
When I opened the packaging for installing the fishing line in the spool, its plasticity, and not elasticity, immediately caught my eye. She bends easily, behaves like soft wire: upon contact with grass, it immediately breaks. It is impossible for her to mow: she managed to return it to the seller.
Since then, I buy only that fishing line that can be crushed in my hands and evaluate its performance properties.
I try to refuse varieties of ordinary round fishing line. I prefer them a ribbed shape with edges: an asterisk, a trapezoid, a square or a triangle. They cut grass better.
The solidly assembled trimmer mechanics are well balanced. It provides comfortable operation. However, bearings can wear out over time and lose lubrication.
The prefabricated shaft, which transmits rotation from the engine to the spool, is able to touch the inner walls of the rod, creating excessive friction with heating.
Such a defect can and should be eliminated. This technology is shown by the TV Repairman in his video “Vibration during the operation of the electric scythe”.
If you still have questions about how to repair an electric trimmer, then ask them in the comments. I will answer.
