In detail: DIY repair of power saws from a real master for the site my.housecope.com.
Electric saw Makita UC4030A with a 5-meter cord (Fig. 1). I bought it to make it easier to work in the country, as I was tired of sawing dry trees. She showed herself excellently, with the exception of the oil supply system, but more on that later.
Rice. 2-5. We flip the flag of the tire fastening screw, slightly loosen the tire with it, then loosen the chain with the tensioner screw, then unscrew the sprocket cover with the tire fastening screw and remove the cover, and then the tire with the chain.
Rice. 6,9,10. We unscrew the two screws securing the engine, on the other side it is necessary to unscrew two more screws, having previously removed the cover of the oil tank for convenience, After that, we disconnect the engine from the gearbox.
Rice. 11, 13 Remove the lock washer from the sprocket shaft, then the washer and take out the sprocket.
Rice. 14, 15. Unscrew the 6 screws securing the handle and the toothed stop and remove them.
Rice. 16. Turn the gearbox over and remove the cover.
Rice. 17, 19, 20. Pull the tube off the oil pump, take out the oil tank, press the chain brake lever towards the braking side until it clicks, then remove it.
Rice. 21-26. We turn the gearbox over and remove the aluminum cover along with the driven shaft. And there we see that there is little lubrication in the gearbox, but there is a lot of sawdust, but it should be the other way around. It is clear with sawdust, the aluminum lid adjoins the plastic body only at three points, therefore there are three slots between the lid and the body, through which sawdust flies in and grease escapes. On the driven gear, lubrication is only on the periphery, and the drive gear is generally dry.
Rice. 27, 28. We clean all the parts of the gearbox.
Video (click to play).
Rice. 29, 30, 31. We take out the pump plunger and the pump itself.
Rice. 32. Taking the pump by both sides with our hands, we try to rotate both parts in different directions, while pulling one out of the other. The pump should disconnect.
Rice. 33. Now it's pump time. Examine all parts carefully. The ball and spring should be free to pull out, the rubber ring should be where it is in the picture. My ball bit the ring in the square (left side) of the pump because of a small step in the body. The pump is the most moody part of the saw. For some, he pours oil, for others, he does not pump at all. This topic was discussed on the site's forum. If the oil is pouring, then the ball is to blame. You need to put more. Or pour the oil thicker. If not pumping, then grabbed air. The pump does not like air very much due to the fact that there is only one check valve. If there is air in the tube, the plunger will drive it back and forth. There is an exit. It is necessary either to create excess pressure in the oil tank (by mouth, pump) so that the oil itself pushes the air, or to create a vacuum in the outlet channel after the pump using a syringe. The latter method works well.
Rice. 34.35.36. You need to make sure that the brake mechanism is in the braking position, if not, then put on the lever and move it to the front position until it clicks. In this position, the tension of the spring is minimal and you can pry it off with a screwdriver, but preferably with gloves. We take out the spring and rods.
Rice. 37, 38. Unscrew the screw and remove the brake band.
Rice. 39. We remove the tube from the tank.
Rice. 40-44. To eliminate the gap between the lid and the body, I found a washer with a bent edge along the diameter of the body, cut out the technological holes and grooves, screwed the washer to the lid. The places where the stops protrude through the washer are covered with sealant.
Rice. 45. Apply some lubricant to the pinion gear. I squeezed out half of the tube. When the sealant hardens, I will smear it on the gear and, if it is necessary, I will add more.One hell, centrifugal force will scatter in the corners.
Rice. 46, 47. Remove the drive gear from the motor shaft. We take out the brushes.
Rice. 48. Unscrew 6 screws on one side and one on the other.
Rice. 49-51. Remove the cover. The motor rotor is pulled out with little effort.
The assembly is carried out in the reverse order.
Dismantling the electric chain saw
The design component of an electric chain saw is presented in the form of a protective shield, which is a saw brake. The protective shield is triggered during a sharp throwback of the tool in this case, if an unsuccessful contact with the sawing object occurs. It should also be noted that when disassembling, it is imperative to take into account a special container through which, with the help of a filter, oil is supplied to the chain, created for automatic lubrication. Most models have an adjustable lubrication intensity for workflow with different hardness materials. Some models anticipate a special adjustment.
During disassembly, the electric motor is first disconnected, and in the forthcoming one and the rest of the working part, which is presented in the form of a chain resting on the bus with teeth attached together by means of hinges. The chain is presented in the form of adjusted thickness and sharpening of teeth. Such a feature is needed first so that it does not jam during the working process. In an unpleasant case, slippage may occur, and there may even be a stopper, which can very badly affect the engine itself.
Therefore, if you carry out disassembly electric saw for any repair or maintenance work, then especially for the long working process of the machine, you need to select a suitable oil liquid, also track its level and sharpen the blade at the right time during operation.
VIDEO The brake in the saw will podkubit a little, but the owner refused to replace it. VK: Group:.
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No oil is supplied to the chain. Airing the oil pump.Makita electric saw 4320 Oil pump. Repair.
The design of each chain electric saw is universal, and for this reason all saws are built according to one, similar principle - professional chain saws and the most common models carry out their work on it. In addition, when disassembling electric saw special attention should be paid to such a very important element in the design as an asterisk. The sprocket is a structural element of the saw and is located in the same plane with the blade; thanks to the sprocket, the process of rotation of the chain begins, which, as a result, begins the sawing itself (with the help of special cutting tools or teeth). In the design of each electric chain saw, there is a special tank with a capacity of 500 ml, into which chain oil is poured. After that, the oil begins to be distributed throughout the tire, and from there it begins to be transferred to the working and guide sprocket.
During disassembly, it must be remembered that the electric motor of the chain saw is located in the perpendicular position of the saw bar, since with this arrangement, the most acceptable option for the very implementation of the transmission from the motor shaft to the sprocket will be simple and effective.
During disassembly, the clutch is also not ignored, which serves as the protection of the saw from various breakdowns. The clutch itself is presented in the form of a package consisting of spring conical washers, which are compressed and wedged from the top by means of a spring locking end. During the disassembly process, the ring must be removed, but at the same time it is not necessary to squeeze each clutch washer.
Electric saws are an indispensable tool in a summer cottage or in a private house. It easily copes with cutting thick branches, planks and various wood materials.Even the most reliable tool has its own degree of wear, it is periodically required to correct minor or major breakdowns. Do-it-yourself electric saw repair is possible only in some cases and in the presence of certain skills and tools. Often the tool has to be returned to the service. But there are some breakdowns that can be easily corrected on their own.
In order to master the skills of repairing electric saws, it is necessary to understand their design. The main element that cuts the material is the saw chain, which is driven by the motor. The chain itself is a set of cutting links, which are held together by hinges. The movement of the chain is carried out along a plate, which is called a tire. This part is made of high quality steel, which is not subject to chips, scratches and corrosion - this is the main indicator of the quality of the tool. Tires are distinguished by design:
welded;
one-piece with a removable tip;
solid with carbide tip.
A welded bar is something like a "sandwich" that is welded from three parts into one, with a driven sprocket riveted into the structure. One-piece design with replaceable tip - one sheet product, ideal for long instruments. In such a tire, the main load falls on the roller bearing of the driven sprocket. One-piece configuration can reduce friction loss by 8-10%. If the tool has a solid carbide tire, then it is optimally suited for work with high loads, as well as for use in conditions where there is a lot of sand, dust and dirt.
1. When working with an electric saw of any configuration, it is necessary to remember about the possibility of a "kickback" - throwing the tool towards the person performing the work. This situation occurs when the very end of the guide bar rests against the material being cut. To avoid injury in such a situation, manufacturers equip saws with an automatic chain brake.
2. An automatic chain brake is also called an inertial drive, which works thanks to a shield located in front of the left hand of the person performing the work. Before starting work, this shield is placed in a position closer to the hand so that it can be quickly activated if necessary. If there is a moment of kickback, then the operator's hand rests on this guard and the chain stops. The position also changes due to the inertia arising from the impact. Such a system makes it possible to reduce the likelihood of repairing electric chain saws, since its main mechanism will not be damaged during an impact.
3. Another system that prevents wear and damage is automatic chain lubrication. Oil is poured into a special reservoir, which, during the operation of the saw, is transferred through the oil pump to the drive sprocket and chain. Some models even have an oil supply regulator, since different amounts of oil are needed for different intensities of work. For example, repairing a Makita electric saw involves inspecting the oil supply system.
4. Electric chain saws have some drawbacks or weak points. One of them is the gearbox design. The torque is transmitted to the chain through a gearbox, which is rigidly connected to the anchor of the electric motor. This design transfers all the loads to the motor, that is, if the workpiece contains solid inserts or the saw chain is dull, then it will not slide so smoothly over the surface. This will result in overheating of the motor or wear of some of its parts. As a preventive measure, it is necessary to sharpen the saw in a timely manner and not to put pressure on it while working. Often they come to the service repair of a Parma electric saw with this kind of malfunction.
5. The second weak point of saws with an electric motor is the dependence on the voltage in the network.If it falls, the load on the motor increases, in models that are not equipped with thermal protection of the motor, the increasing load leads to its combustion. But the temperature rise protection also has disadvantages, since at low voltage it is triggered, reducing performance. For example, the repair of an Interskol electric saw is often reduced only to an increase in the voltage in the network, after which the tool functions properly.
If the saw does not turn on, it is necessary to check the presence of power, the integrity of the wires and connections.
If everything is in order in the power supply, it is necessary to check the chain brake, which blocks the operation of the tool. To eliminate this problem, you must move the brake shield to a different position.
If the measures described above did not turn on the saw, then it is necessary to check the integrity of the cable and plug.
If the saw power has decreased, productivity has dropped, it is necessary to replace the carbon brushes, which, apparently, are worn out.
Quite often, the chain does not start to stop immediately, but after a certain period of time. The longer the saw is used, the longer this time interval becomes. To get rid of this problem, it is necessary to replace the saw brake band, which has worn out over time.
The saw often produces an unpleasant, cutting sound in the ear. This sound often appears due to a lack of oil in the mechanism or due to contamination of its conductive grooves. Troubleshooting is simple - add oil and clean the furrows.
It is important to use only original spare parts recommended by the manufacturer for repairs. Using third-party spare parts often leads to tool breakage or hazardous situations.
If there is damage to the case, then for your own safety, the saw must be returned for repair.
Do not replace cutting parts of the tool that are not recommended by the manufacturer or do not fit in design.
One of the saw elements that you need to keep track of yourself is the chain. It must be sharpened prophylactically, since if it is delayed with this process, it will no longer be possible to repair the electric chain saw with your own hands. It must be taken to a service where they will be sharpened on professional machines.
1. Extending the service life of the saw blade:
before starting work, make sure that there are no solid metal objects in the workpiece. If there is a contact of the cutting element with a metal object, then a notch or chip will remain on the chain, which can no longer be removed;
it is impossible to carry out work on the ground, as the deepening into the ground will clog the oil grooves, as a result of which the chain will remain without normal lubrication and will wear out faster;
it is necessary to monitor the saw wedge, it must not be allowed, as this overheats the metal and reduces its service life.
2. How to determine if the saw needs sharpening. To do this, it is enough to pay attention to the shavings - if they are small and slightly darker, then the chain is dull. This is because the blunt edges do not remove the required cutting layer, which leads to chip breakage. Also, the quality of saw sharpening is determined on the basis of visual inspection, there should be no radii on the saw part, no damage in the form of torn sections, the shape of the tooth and cutting edge should be the same as on a new tool.
If all these factors do not meet the necessary requirements, then the saw needs to be sharpened. Continuing to work on a blunt saw will have an impact on productivity as well as the service life of the saw. With sharpened elements, the load on the motor increases, it overheats and all its elements wear out faster than the specified period.
3. How to sharpen an electric saw yourself:
a special tool is required for sharpening, this is a set of round and oval files, a mandrel and a caliber;
sometimes the kit additionally includes a hook for cleaning the chain slots from chips;
a round file is combined with a mandrel;
flat file and caliber are used separately;
the chain is sharpened on the saw blade itself;
for sharpening on the machine, the chain is removed from the bar;
the chain is installed on the guide of the machine and tightened with a roller and a ratchet, which hold it by the cutting tooth;
the machine has a protractor that sets the sharpening angle;
the abrasive wheel is lowered, with its help an insignificant layer of metal is removed - about a few tenths of a millimeter. This is the process of straightening and sharpening the chain;
after straightening one tooth, the guide is rearranged to the next, and so on;
this type of sharpening allows you to withstand the rigid framework of dressing and sharpening the tool;
if there is a desire to purchase such a machine for yourself, then it is recommended to purchase not an electric version of it, but a manual one, since its cost is much lower. The machine allows you to push back the repair of Bosch electric saws and any other manufacturers.
VIDEO
Do-it-yourself electric saw repair is of interest to all owners of such tools. It should be understood that any device has its own degree of wear, therefore from time to time it will be necessary to repair various malfunctions.
Electric saws are widely used in suburban areas for cutting branches, boards and trees.
Electric saws are indispensable tools for summer cottages or private homes. They are able to easily cope with sawing branches, thick boards, as well as various wood blanks. To repair this device, you need to have some skills and tools. In most cases, electric saws are repaired by experienced professionals. However, there are some types of faults that you can easily fix yourself.
Elements that will be necessary in order to repair an electric saw with your own hands:
original accessories recommended by the manufacturer;
files in the form of circles and ovals;
mandrel;
caliber;
chain sharpening device.
The following breakdowns are most common:
If the tool does not turn on, you will need to check the power supply, the condition of the cables and connections.
If the supply network is in good condition, it will be necessary to check the chain brake, which stops the operation of the device. To fix this problem, you need to change the position of the brake element shield.
If the power saw fails to turn on, then you will need to check the condition of the cable.
If the power of the saw has decreased, this means that the brushes are worn out. In this case, they must be replaced.
Quite often, the chain does not stop immediately, but after a while. The longer the file is used, the longer this period of time becomes. To fix this problem, you need to replace the saw brake band.
In some cases, there is an unpleasant sound during the operation of the saw. It most often appears due to insufficient amount of oil in the device or due to clogged grooves that pass it. To rule out a malfunction, you will need to add oil and clean the grooves.
When carrying out repair work, only original accessories recommended by the manufacturer must be used. If elements from third-party manufacturers are used, this will lead to breakdowns of the device or the occurrence of unforeseen situations.
If the case is damaged, it is best to return the tool for repair.
It is not allowed to replace the cutting elements of the device that are not intended for it.
One of the components of a saw that you need to keep an eye on is the chain. It needs to be sharpened from time to time.If you tighten up with this process, then you will not be able to repair the electric chain saw yourself. In this case, it will have to be sent to a service where sharpening will be carried out on special devices.
Saw chain lubrication system.
You can extend the service life of the sawing element as follows:
Before starting work, you need to make sure that there are no solid metal elements in the workpiece. If the element for cutting comes into contact with the metal workpiece, then notches or chips will appear on the chain, which cannot be removed in the future.
Do not sharpen on the ground, as digging into the ground can clog the oil grooves. As a result, the chain will not be lubricated and will wear out quickly.
Be sure to keep an eye on the saw blade. Jamming should not be allowed, as as a result, the metal will overheat and reduce its service life.
It should be determined whether it is necessary to sharpen the saw. To do this, you need to pay attention to the chips: if they are small or have a dark color, then the chain is dull. Blunt edges are not able to remove the desired cutting layer; as a result, the chips are crushed. The quality of the sharpening of the tool can also be determined by inspection. The part that is used for sawing must be free of defects in the form of torn pieces. The shape of the serration and cutting edge must be the same as when not in use.
If these factors do not meet the relevant requirements, then the saw must be sharpened.
If you perform work using a blunt file, this can affect productivity, as well as the period of possible use of the tool.
VIDEO
In the case of using blunt elements, the load on the electric motor will increase, as a result, it will overheat and all its parts will wear out before the specified period.
You can sharpen an electric saw as follows:
Scheme of manual sharpening of a chain of an electric saw.
To sharpen, you will need to prepare a special set of tools, which consists of files in the form of circles and ovals, a mandrel and a gauge. In rare cases, such a set may include a hook for cleaning the chain slits.
The file in the shape of a circle must be combined with a mandrel.
The flat file and the gauge must be used separately.
The chain is sharpened on the saw blade.
The mandrel is placed on the edge of the cutting teeth, and the angle of sharpening of the chamfer must be taken into account.
The sharpening angle should be between 30 ° and 100 °. The most time consuming dressing process is setting the correct angle. If you set the wrong angle, the tool will deteriorate.
During the sharpening process, the file should be installed perpendicular to the shank, it should protrude slightly above the tooth.
Sharpening must be done in one direction.
When one tooth is sharpened, the chain needs to be scrolled and start sharpening the other tooth.
When all the teeth are sharpened with a file, you need to start processing the cut - a protrusion on the chain that has no edges for cutting. This element is placed on the same plate with a tooth. This device is designed to form a depression during the cutting process.
If the cut stops protrude, the chain will not cut. In this case, it will slip. If the restraining elements are deeply recessed, then the wood will jam the cutting element of the device.
Editing of the cut stops is done using a gauge. It will need to be applied to the edge of the cutting teeth. The end rail must be flush with the boundary piece.
If the limiting element protrudes, then it must be trimmed. In this case, you can use an ordinary flat file.
With a similar tool, you need to move along the bounding element in the same direction.
In this case, you need to do the following:
Angle table for sharpening the chain on the machine.
The first step is to remove the chain from the shank.
The chain is installed on the guide element of the device and tightened with a roller and a ratchet. These elements will hold the chain by the cutting teeth.
You can set the sharpening angle with a protractor, which is installed on the device.
The abrasive wheel must be lowered, with its help a small part of the metal is removed - approximately 0.001 m. Thus, the chain is straightened and sharpened.
After straightening the first tooth, the guide element will need to be rearranged to the next one. Thus, all the teeth are straightened.
With the help of such a sharpening, it will be possible to withstand the rigid framework of the fixture editing.
If you plan to buy such a device for personal use, then it is recommended to purchase not an electrical device, but a manual one. The latter is much cheaper.
VIDEO
It is quite simple to repair and sharpen an electric saw with your own hands, you just need to prepare all the necessary tools and follow the correct sequence of actions.
Like any tool, Makita power saws need preventive maintenance. From time to time it is necessary to replace those parts that are very worn out. This applies to any product in the line, be it the Makita UC3520A with a 1800W motor or the UC4530A with 2000W. If you do not pay attention to some points when inspecting and preparing the saw for work, the device may even break down.
Preparation is carried out in several stages:
Since the device is quite massive, for example, the UC4530A weighs 4.3 kg, we put it on the table and use a special key (supplied in the kit) to screw the fastening nut. Then remove the sprocket boot.
The bolt, with the help of which the chain is adjusted, is scrolled in the direction opposite to the movement of the hand on the clock. The pin should enter the left end position.
We pass the chain between the teeth of the gear, wrap the sprocket with it. On the top of the tire, the teeth should be in the direction of the arrow.
We put the tire back. The pin must fit exactly into the bus hole.
We fasten the sprocket cover back, manually tighten the fastening nut slightly.
Check that the saw chain is properly tensioned. To do this, lift the end of the bar, then turn the chain screw to adjust, this time in a clockwise direction. Be careful, the chain should be firmly pressed against the bottom of the bar.
It remains to thoroughly lubricate the bar and saw chain. To do this, you need to use a special chain oil that has an adhesive additive, biodegradable. The additive prevents liquid from being thrown away. The oil must be filled up to the lower level of the filler neck. Make sure that no dirt gets into the oil tank. To do this, clean the filler neck before filling.
Screw the tank cap back on. Start the saw and run it at no load for 2 minutes to gradually lubricate the chain with oil.
After completing all the stages of preparation of the makita uc4030a saw for work, gently wipe it from oil residues. Under no circumstances use mineral oils, otherwise you will have to breathe harmful fumes during work.
Convenience, ergonomics, grace and reliability
chain and blade lubrication required
Various models of such a device of the most famous brands were viewed on the Internet. The choice fell on the firm "Makita", although it cost more than the same saw from other firms (10,000 rubles). When I took this saw in my hands for the first time in the store, I realized that the choice was made correctly.
The elegant shape, good centering, comfortable and reliable hand grips that force the body to be in the safest position in relation to the cut, safety devices that increase the safety of work emphasized the high quality of the saw. The very shape of the saw clearly demonstrated the aggressive dynamics of the saw. I didn't want to let go of her.
Makita UC3530A in our store:
The Makita UC 3530 A universal power saw will come in handy on your home, garden or construction site. This model is distinguished by high performance, reliability and durability, and in addition to everything, it is very comfortable to work with. The saw is equipped with a quick-acting chain tensioner and bar removal device without the use of keys, which not only improves productivity, but also eliminates the need to constantly wear additional keys.
The Makita UC 3530 A electric saw is operated by means of convenient and intuitive buttons and levers. Due to its design features, this model is easy to maintain. The use of sealed ball bearings and a special lubrication system of the gearbox ensure long-term operation of the electric saw without specialized maintenance.
In order to increase the safety of the saw, the developers have provided in this model an inertial chain brake, which protects the user from accidental injury as a result of "kickback". This system ensures that the chain stops in a fraction of a second - even before the thrown tool can “overtake” the user and cause injury. To protect the network from overloads and to prevent premature wear of the mechanism, the Makita UC3530A saw has a built-in electronic system for limiting the starting current.
The Makita UC 3530 A electric saw is equipped with a powerful longitudinal motor providing a high cutting speed of 13.3 m / s. Due to the longitudinal position of the motor, the tool is compact and perfectly balanced. Comfortable rubber grips provide maximum control over the saw during operation. The saw is equipped with an automatic chain lubrication system (the capacity of the built-in oil tank is 0.14 liters), which prolongs the service life of the saw headset and the tool as a whole. Visual control over the lubricant level is carried out through a transparent sight glass.
Chainsaws are used today in a wide range of applications. This relatively simple tool is essential in everyday life for solving a wide variety of tasks. You can order the Makita UC3530A power saw in the Klondike online store.
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Electric saws are an indispensable tool in a summer cottage or in a private house. It easily copes with cutting thick branches, planks and various wood materials. Even the most reliable tool has its own degree of wear, it is periodically required to correct minor or major breakdowns. Do-it-yourself electric saw repair is possible only in some cases and in the presence of certain skills and tools. Often the tool has to be returned to the service. But there are some breakdowns that can be easily corrected on their own.
In order to master the skills of repairing electric saws, it is necessary to understand their design. The main element that cuts the material is the saw chain, which is driven by the motor.The chain itself is a set of cutting links, which are held together by hinges. The movement of the chain is carried out along a plate, which is called a tire. This part is made of high quality steel, which is not subject to chips, scratches and corrosion - this is the main indicator of the quality of the tool. Tires are distinguished by design:
welded; one-piece with a removable tip; solid with carbide tip.
A welded bar is something like a "sandwich" that is welded from three parts into one, with a driven sprocket riveted into the structure. One-piece design with replaceable tip - one sheet product, ideal for long instruments. In such a tire, the main load falls on the roller bearing of the driven sprocket. One-piece configuration can reduce friction loss by 8-10%. If the tool has a solid carbide tire, then it is optimally suited for work with high loads, as well as for use in conditions where there is a lot of sand, dust and dirt.
1. When working with an electric saw of any configuration, it is necessary to remember about the possibility of a "kickback" - throwing the tool towards the person performing the work. This situation occurs when the very end of the guide bar rests against the material being cut. To avoid injury in such a situation, manufacturers equip saws with an automatic chain brake.
2. An automatic chain brake is also called an inertial drive, which works thanks to a shield located in front of the left hand of the person performing the work. Before starting work, this shield is placed in a position closer to the hand so that it can be quickly activated if necessary. If there is a moment of kickback, then the operator's hand rests on this guard and the chain stops. The position also changes due to the inertia arising from the impact. Such a system makes it possible to reduce the likelihood of repairing electric chain saws, since its main mechanism will not be damaged during an impact.
3. Another system that prevents wear and damage is automatic chain lubrication. Oil is poured into a special reservoir, which, during the operation of the saw, is transferred through the oil pump to the drive sprocket and chain. Some models even have an oil supply regulator, since different amounts of oil are needed for different intensities of work. For example, repairing a Makita electric saw involves inspecting the oil supply system.
4. Electric chain saws have some drawbacks or weak points. One of them is the gearbox design. The torque is transmitted to the chain through a gearbox, which is rigidly connected to the anchor of the electric motor. This design transfers all the loads to the motor, that is, if the workpiece contains solid inserts or the saw chain is dull, then it will not slide so smoothly over the surface. This will result in overheating of the motor or wear of some of its parts. As a preventive measure, it is necessary to sharpen the saw in a timely manner and not to put pressure on it while working. Often they come to the service repair of a Parma electric saw with this kind of malfunction.
5. The second weak point of saws with an electric motor is the dependence on the voltage in the network. If it falls, the load on the motor increases, in models that are not equipped with thermal protection of the motor, the increasing load leads to its combustion. But the temperature rise protection also has disadvantages, since at low voltage it is triggered, reducing performance. For example, the repair of an Interskol electric saw is often reduced only to an increase in the voltage in the network, after which the tool functions properly.
If the saw does not turn on, it is necessary to check the presence of power, the integrity of the wires and connections.If everything is in order in the power supply, it is necessary to check the chain brake, which blocks the operation of the tool. To eliminate this problem, you must move the brake shield to a different position. If the measures described above did not turn on the saw, then it is necessary to check the integrity of the cable and plug. If the saw power has decreased, productivity has dropped, it is necessary to replace the carbon brushes, which, apparently, are worn out. Quite often, the chain does not start to stop immediately, but after a certain period of time. The longer the saw is used, the longer this time interval becomes. To get rid of this problem, it is necessary to replace the saw brake band, which has worn out over time. The saw often produces an unpleasant, cutting sound in the ear. This sound often appears due to a lack of oil in the mechanism or due to contamination of its conductive grooves. Troubleshooting is simple - add oil and clean the furrows. It is important to use only original spare parts recommended by the manufacturer for repairs. Using third-party spare parts often leads to tool breakage or hazardous situations. If there is damage to the case, then for your own safety, the saw must be returned for repair. Do not replace cutting parts of the tool that are not recommended by the manufacturer or do not fit in design.
One of the saw elements that you need to keep track of yourself is the chain. It must be sharpened prophylactically, since if it is delayed with this process, it will no longer be possible to repair the electric chain saw with your own hands. It must be taken to a service where they will be sharpened on professional machines.
1. Extending the service life of the saw blade:
before starting work, make sure that there are no solid metal objects in the workpiece. If there is a contact of the cutting element with a metal object, then a notch or chip will remain on the chain, which can no longer be removed;
it is impossible to carry out work on the ground, as the deepening into the ground will clog the oil grooves, as a result of which the chain will remain without normal lubrication and will wear out faster; it is necessary to monitor the saw wedge, it must not be allowed, as this overheats the metal and reduces its service life.
2. How to determine if the saw needs sharpening. To do this, it is enough to pay attention to the shavings - if they are small and slightly darker, then the chain is dull. This is because the blunt edges do not remove the required cutting layer, which leads to chip breakage. Also, the quality of saw sharpening is determined on the basis of visual inspection, there should be no radii on the saw part, no damage in the form of torn sections, the shape of the tooth and cutting edge should be the same as on a new tool.
If all these factors do not meet the necessary requirements, then the saw needs to be sharpened. Continuing to work on a blunt saw will have an impact on productivity as well as the service life of the saw. With sharpened elements, the load on the motor increases, it overheats and all its elements wear out faster than the specified period.
3. How to sharpen an electric saw yourself:
Video (click to play).
for sharpening on the machine, the chain is removed from the bar; the chain is installed on the guide of the machine and tightened with a roller and a ratchet, which hold it by the cutting tooth; the machine has a protractor that sets the sharpening angle; the abrasive wheel is lowered, with its help an insignificant layer of metal is removed - about a few tenths of a millimeter. This is the process of straightening and sharpening the chain; after straightening one tooth, the guide is rearranged to the next, and so on; this type of sharpening allows you to withstand the rigid framework of dressing and sharpening the tool; if there is a desire to purchase such a machine for yourself, then it is recommended to purchase not an electric version of it, but a manual one,since its cost is much lower. The machine allows you to push back the repair of Bosch electric saws and any other manufacturers.
