In detail: do-it-yourself titanium electric saw repair from a real master for the site my.housecope.com.
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.
Video (click to play).
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 guard 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. Such a 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.
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.