Almost every summer resident and villager today has a chainsaw. This tool is in high demand, since it can be used to solve many problems. But if the saw fails, it can easily be repaired independently, but in some cases it takes a lot of time.
Design features of a chainsaw
The farm usually uses semi-professional or household saws that are able to solve the problems of a small front of work. All of them have almost the same design, for example, a two-stroke air-cooled carburetor engine with one cylinder.
The stability of the work will depend on the carburetor, because it is responsible for the preparation of the fuel-air mixture. Air enters the engine, which should not contain any contaminants such as dust. Otherwise, the piston group will quickly become unusable. In order to avoid such problems, the air filter must be cleaned from time to time. In addition, the manufacturer provides for this a preliminary air purification mechanism.
Chainsaw malfunctions can be expressed in different manifestations. In some cases, the engine will not start, while in others it can be started, but it will immediately stall. It can work unstably or idle in normal mode, while under load it loses power. Sometimes it also happens that, exerting a load on the chainsaw, you are faced with the problem that it stalls. All of this may indicate a malfunction in the ignition system.
The market today offers many models of chainsaws, below are examples of malfunctions and solutions for individual brands of such equipment.
Preparation of tools for repair
There are a lot of malfunctions of chainsaws, but a certain set of tools is usually required for repairs, among them are:
- key for removing candles;
- keys of various sizes;
- screwdrivers of various shapes and sizes.
You will need a saw circuit.
Unit malfunctions are indicated by some symptoms. For example, if the problem is in the engine, it will manifest itself in the impossibility of starting it or killing it after a short operation. You may notice smoke, overheating, and erratic operation. During the stroke, the saw may lose power. All other signs usually indicate a breakdown of other systems.
Ignition system repair for Partner 350 chainsaw
If you need to check the system, start work by inspecting the spark plug. If it turned out to be dry, this will indicate that the fuel mixture does not enter the cylinder. Ignition is completely irrelevant.
If you have a Partner 350 chainsaw, the malfunctions and their elimination for this model will be described later.
So, if the excess spark plug is filled with fuel mixture, the start was carried out incorrectly, in some cases, this is indicated by incorrect carburetor adjustment. To eliminate the problem, the candle must be wiped, shut off the fuel supply and eliminate its remnants. The camera is then aired, only after which you can start the starter. The candle is put in place, then the engine can be restarted.
A rather popular equipment option is the Partner 350 chainsaw. Faults and solutions for this unit are described in this section. For example, if black soot was seen on a candle, this indicates the use of low-quality oil. Another reason for this malfunction is expressed in violation of the percentage of gasoline and oil in the fuel mixture. The fault can be an incorrectly adjusted carburetor. In order to solve the problem, the candle must be washed, rid it of soot with a needle or a sharp awl, and then clean the electrodes with sandpaper. Then the candle returns to its place. When checking it, you should pay attention to the gap between the electrodes. It should make a limit of 0.5 to 0.65 mm.
If the gasket in the spark plug is damaged or worn out, this may cause problems with starting the motor. The candle must also be checked for sparks. To do this, you need to bring the ignition cable to it. The candle is clamped with pliers with insulated handles, while the candle is applied to the cylinder with a nut or thread. When you pull the starter rope, you can check if there is a spark. If it is not, the candle must be replaced. When the spark does not give out and a new candle, the problem may lie in the high-voltage wire.
Malfunctions in the fuel system of the Husqvarna chainsaw
One of the common malfunctions of the Huskvarna chainsaw is that the fuel does not enter the cylinder. This happens for one of several reasons. The first is the contamination of the fuel filter. In order to eliminate this problem, it is necessary to remove the fuel hose and look at how the fuel flows. If the jet is rather weak, the filter needs to be cleaned. It is taken out through the fuel filling hole. In case of severe contamination, the filter must be replaced.
Clogging of the breather can also lead to the above-described malfunction of the Huskvarna chainsaw. It is a hole in the tank cap. The hose to solve the problem is removed, which allows you to clean the blockage with a needle. Fuel does not get into the cylinder also for the reason that it is not enough or it has run out. The cause may be a clogged filter. The air in the right amount simply does not get into the carburetor, the fuel mixture is too enriched, which prevents the normal functioning of the engine.
In order to solve the problem, the filter must be removed, washed and dried. After that, it is installed in place. Chainsaw carburetor malfunctions can also cause fuel not to enter the cylinder. This unit is one of the main for the engine, so it is better to entrust the adjustment to a professional. When tuning is done independently, the engine can be completely disabled.
Dismantling and cleaning the "Ural" chainsaw muffler
If the engine at idle is working quite normal, and when the load increases, it simply stalls, the muffler may be the reason. The combustion products of the fuel fall into the spark arrester, which prevents the exhaust. To eliminate this malfunction at the Ural chainsaw, the muffler must be removed and cleaned of soot. It is allowed to use a detergent for this.
The muffler is dried, and in the process, the hole in the engine is plugged with a clean rag. The muffler may be clogged due to excess oil in the fuel mixture. Sometimes it happens that the oil is of poor quality or simply not suitable for two-stroke engines.
Checking the performance of the cylinder of the "Calm" chainsaw
During the operation of the device, you may notice that the engine does not work at full power or does not start due to insufficient pressure in the cylinder. Wear on the cylinder may cause this. The piston also wears out quite often, the piston rings sink, and the crankshaft bearings become unusable.
You can check the condition of the cylinder-piston group by removing the muffler. You must look into the hole. The review will be limited, but you will have an idea of the state of the cylinder. This will allow you to understand what the malfunction of the "Calm" chainsaw is, and also to determine what condition the cylinder is in. For a more accurate understanding, a compressometer must be installed in the candle hole. Manually crank the starter. You can use an electric drill. Within 9 atmospheres should be the pressure of the saw. If this parameter is lower, the power should decrease.
Having disassembled the engine completely, you can get an accurate picture. The crankcase for this is disconnected from the cylinder, which allows you to inspect the piston. If deep scratches or chips are seen on it, the piston changes. Piston ring wear may indicate a decrease in compression. It should not be covered with soot if it is in working condition. Its position should be free inside, from above it should be tightly pressed.
Partner Chain Lubrication System Repair
A chainsaw may not work properly if the lubrication system is faulty. The reasons for this may be:
- cracks in the pump housing;
- insufficient oil supply;
- violation of the tightness of the connection of the fitting and the tube.
So, one of the malfunctions of the Partner chainsaw, as mentioned above, is that oil can leak. To fix the problem, make sure that the tube and pump fitting are tight. They should not be cracked. If you find defects, the tube must be replaced or the error corrected with a sealant.
Sometimes the oil does not flow in enough. This is indicated by clogged channels. In this case, they are well cleaned. The reason here lies in the fact that when clogged, the lubricant is supplied in small quantities. But if you notice cracks in the oil pump housing, then it should be changed.
Problems with an asterisk on the "Partner" saw
Chainsaw malfunction can be expressed in jammed chain movement or sprocket wear. To resolve the problem, open and revise the entire clutch assembly. In the process, you should check if there are any deviations from the tooth sizes from normal values, this parameter should not exceed 0.5 mm. Otherwise, the saw will work with increased vibration, which will cause premature failure of the entire tool or crankshaft bearings.
The sprocket’s working life is usually 2 times the life of the chain on the Partner chainsaw. Malfunctions and their elimination, however, can happen much earlier. In practice, it is best to use about two chains until their cutting edges are completely worn. After that, you can purchase a new kit and replace the asterisk.
For work, remove the air filter and remove the spark plug to gain access to the engine cylinder. The shaft rotates clockwise, the piston of the cylinder rises to a vertical position. Then it should be taken back a few millimeters. Above the piston, the interior of the cylinder is filled with a tight cord for fixing. As soon as the crankshaft is fixed, the puller must be inserted into the coupling hole and turned until it is completely dismantled.
Behind the clutch there will be an asterisk and a needle bearing, which is responsible for the smooth rotation. If wear is detected, it is replaced with a new one. Next, you can install all the parts, acting in the reverse order. To install the coupling, you will have to fix the piston, but you need to do this with the left rotation of the crankshaft a few millimeters to the top point. Work must be done carefully to avoid breaking individual parts of the mechanism.
Work with brake circuit failure
The saw may also refuse to work due to a malfunction in the chain brake. Sometimes this leads to clogging of the space under the cover. The chain brake also fails due to wear on the brake band. If you are faced with the first option of a chainsaw malfunction, the remedy should be to clean the blockage.
The second case involves replacing the tape. In the process, parts wear out to varying degrees. In order to keep the tool in working condition, from time to time you need to change parts, among which are most often found:
- chain;
- drive sprocket;
- anti-vibration unit;
- the tire.
How to avoid breakdowns
In order not to prematurely repair the chainsaw malfunctions, it is necessary to operate it correctly. One of the basic rules that must be followed is the proper start-up of the equipment. Before each switching on, make sure that the circuit is intact. The teeth should be well sharpened, the chain should be tight. She should not sag. You can check the correct tension by pulling the chain slightly away from the web.
Sharpening of the chain is carried out on a special machine or using a file with a special template. It all depends on what step the tooth chain has at your saw. In order not to look ahead of time for the causes of malfunction of the chainsaw, after each use it is necessary to carry out cleaning. This applies not only to the housing and cooling fins, but also to the air filter, tire and chain. After using the saw, the tire must be turned over so that it wears out evenly. An asterisk should be lubricated if there are slots in the front of the device.
Chainsaw malfunctions can result from improper storage. If you do not plan to use the unit for a long time, drain the oil and fuel. The tire and chain form an electrochemical pair, so they rust together, and therefore they need to be stored separately.
Finally
If you are a summer resident who is engaged in his plot of land only growing fruits and vegetables, you may have a question - why a chainsaw to a person like you. It remains open until you have the task of building a bathhouse, felling an old tree or updating a greenhouse. You can’t do without a chainsaw even if you want to make a bench for relaxation. But no matter how modern and high-quality such equipment may be, from time to time it will need repair, which you can do on your own.