Chainsaw break-in after replacing the piston
Before the very beginning of the process of operating any chainsaw for imported production, preliminary running-in is required. It will be needed only on one side, to prolong the operation of the gasoline engine.
At the moment of the phase for running-in, the moving parts must first be run in to each other, given that an increase in the level of frictional resistance is observed in the operation of the drive mechanism. Therefore, on the other hand, at the time of running in, you can acquire the necessary skills to work with a chainsaw. This is quite important for anyone who is using a chainsaw for the first time. How to rent a power tool this site will tell you everything.
For the process of working with a chainsaw when using a fuel mixture, only branded oils should be used. Oil grades that can be used for the fuel mixture as indicated in the operating instructions. Observe the correct proportions of gasoline and oil. The octane amount of gasoline used must also be at least ninety (except for those used cases, when specified in the operating instructions).
Before using the chainsaw, be sure to check that there is oil in the tank for the chain lubrication process. At the highest speeds, if the chain is not lubricated, the bar and chain may also fail. During the work itself, you can also easily check for the presence of chain lubrication. When using the chainsaw at high speeds, you need to direct the tire onto a blank sheet of paper. When grease comes in, the oil strip will also be visible on the sheet.
First you need to carefully read the instructions, those sections that relate to starting a cold and hot engine. The principle for starting the engine is the same in all types of saws. Differences here can only be in the different arrangement of the controls for the saw (choke lever and STOP button). Do not forget to check the position for the overrun brake before each start. The inertia brake must also be completely disengaged. With the inertial brake off, the chain on the tire is pulled freely by hand (this operation can only be carried out with work gloves).
When working with chainsaws with an inertial brake engaged, the body of the chainsaw also melts during the clutch process, and a small fire of the chainsaw may also occur. Repair, which is necessary in this case, will be recognized as not guaranteed, and will be carried out at the expense of the client himself.
Running-in must also be done within four hours. When running in, it is forbidden to operate the chainsaw in the running idle mode for a long time. It is also allowed to idle for twenty minutes with the engine running periodically with an interval of thirty seconds. Then you need to continue running in the operating mode with the smallest load.
Disputes on the forums do not fade away. whether you need to run the chainsaw or not.
Oleg Grigoriev, 36 years old, Primorsky Territory
“I bought a Husqvarna saw a year ago. I thought for a long time how to run it in and whether it should be done. There is not a word in the instructions on this matter. In the end, I decided not to do any running-in on purpose, but just to work in an easy mode for a while. I prepared fuel in a ratio of 1 to 50 and began to cut small logs and knots. I worked for 10-15 minutes. And so about 7 cisterns. A year has passed, the engine is working fine, the compression is good. “
Andrey Shepilo, 44 years old, Kharkiv region
“We bought a dacha, and then a saw after it. I didn’t spend too much money. I bought an ordinary Chinese instrument. The instructions say to run in for four hours. And that’s all. Not a word was said in any mode, in any mixture. For about ten minutes she worked for me at idle (then they said that I shouldn’t have done it), and then began to cut a little. It seems that everything is fine so far. “
Ivan Stepanov, 41 years old, Siberian Federal District
“I work in felling. I read the forums about running chain chainsaws and I can safely say that they write a lot of nonsense. Firstly, you cannot run in idle: minimum loads are our everything. Secondly, stop pouring any nasty stuff into the tank and the saw will serve you for a long time. Do not be stingy. buy normal oil, gasoline and maintain the proportions when mixing the mixture. “
Why do you need a chainsaw break-in
It is customary to call the process of grinding in the parts of the CPG by running in a chainsaw. During the running-in process, the final formation of the optimal clearances between the cylinder and the piston rings in the engine of the tool takes place. During the grinding process, the compression in the engine necessarily increases, which directly affects the maximum power and its behavior when starting.
Optimal lapping of the ring surface to the cylinder allows more efficient transfer of the piston heat obtained from fuel combustion to the cylinder walls, which in turn prevents the possibility of its melting. From the definition of the process, it becomes clear how important this process is for the quality operation of equipment.
Failure to comply with the running-in conditions can initially reduce the tool’s working life, as well as its maximum power. In some cases, improper operation of the chainsaw in the first hours of operation can lead to engine jamming, freezing of piston rings, and the formation of thermal scoring on the chainsaw cylinder.
Overheating of the engine caused by improper operation of the chainsaw may result in a refusal to repair under warranty.
For this reason, in the first hours of operation, it is necessary to ensure a gentle engine operation. But it is also not worth it to get too carried away with facilitating the conditions for the instrument. For example, on the Internet pages you can find recommendations for running in a gasoline tool, which indicate that the engine should be run in at idle speed. This statement is fundamentally wrong, since the operation of even a normally run-in engine at idle for a long time is not recommended due to excessive formation of carbon deposits.
In idle mode, the engine crankshaft rotates at minimum speed. Cooling of a two-stroke engine directly depends on the number of its revolutions, since the flywheel is directly connected to the crankshaft.
Cooling is increased in proportion to the increase in engine speed. It follows from this that in operating mode, the motor of the tool will be cooled no worse.
Compliance with the running-in conditions allows you to do without problems with the tool in the first hours of its operation. What is required for the correct running of a chainsaw?
In what cases it will be possible to return the chainsaw under warranty
Your chainsaw can be returned under warranty if:
- after assembly and before the start of work and the first start-up, you noticed a manufacturing defect (chipping, an influx of plastic or metal, etc.) on the body or the saw part of the chainsaw;
- the integrity of the warranty stickers on the case has not been violated;
- if 14 days have not passed since the purchase;
- if documents for the instrument, such as purchase receipts, instructions and warranty card, have been retained by the purchaser.
We repair most brands of power tools and gasoline equipment.
Running in a chainsaw engine after repair
If you figure it out, the parts installed during the repair, like the parts of a new tool, are run-in during the same period of time, which means that the conditions that contribute to this must be the same. This means that for a successful run-in of the engine after a major overhaul, you must perform the following steps:
- Enrich the air-fuel mixture by unscrewing the screw H by ¼ from the position at which the maximum engine speed is reached, and for chainsaws that do not have the ability to adjust the carburetor, increase the amount of oil in the mixture with gasoline.
- Allow the engine to cool more often.
- After working for the first 4 hours, dilute the fuel mixture for household models of the tool according to the manufacturer’s instructions, and for models with carburetor adjustment, bring the maximum engine speed, by adjusting the H screw, to normal.
First carburetor adjustment:
- Start the saw, turn the high and low speed adjusting screws all the way. Unscrew back 1.5 turns;
- Warm up the saw for about 10 minutes. Set the idle speed with the idle screw. With the correct settings, the chain will not move around the tire when idling;
Most of the Chinese chainsaws are in the budget category, which means less quality control and the use of less wear-resistant materials in their production. All this forces the user to run in their instrument immediately after purchase.
Important: before running in, carry out a visual inspection of the device, make sure that all components are securely fastened. Fit the bar and chain: do not run-in without a saw attachment, this could lead to premature engine failure.
A complete running-in of a new chainsaw provides for the correct setting of the fuel system. The standard factory adjustment of the carburetor is based on averaged data, therefore, depending on external factors, it needs to be adjusted.
The saw with the carburetor adjusted should pick up speed quickly, equally stable at operating mode and idle speed. The brown color of the spark plug insulator also indicates the proper quality of the air / fuel mixture.
How to extend the life of a new headset?
Experienced sawers practice daily holding of a new saw set in a container with hot chain oil at a temperature of no more than 60 ° C.
This procedure, known as the stabilization of the internal structure of the metal, has a positive effect on its resistance to external stress and temperature influences. Identical technology is recommended for cutting saw sets used as replacement equipment.
During the running-in process, it is necessary to periodically check the chain tension, the presence of chain oil in the reservoir and its supply to the cutting working area. It is better to postpone the check of the emergency stop mechanism until the development of certain working skills.
Preparing for operation of chainsaws made in China
The standard running-in of a Chinese chainsaw requires the use of only branded engine oils designed to meet the performance characteristics of the Chinese chainsaw range.
Most powerful Chinese models run on motor and chain oils with special additives, which have a positive effect on the stability of their working and operational parameters.
How to properly run a chainsaw
The resource of new chainsaw equipment largely depends on the quality of its preparation for subsequent operation. How to properly run a European or Chinese-made chainsaw with maximum efficiency?
The low-cost in time and material investment process of running in a new tool has a positive effect on its performance and duration of use.
Moderate loads during the first stage of running-in contribute to a full-fledged grinding in of internal parts, a complete and inexpensive development of the assigned turnaround and operational life.
Criteria for self-selection of motor and chain oils
The engine and chain oils recommended by the manufacturer contain special additives that provide working surfaces with full lubrication in a wide range of operating temperatures.
Preparing for the first launch
Before starting the chainsaw, make sure that the emergency stop mechanism of the headset is turned off. The engine is started in the sequence recommended by the instructions.
After a short warm-up, it is recommended to bring the power unit to medium speed to check the lubrication system. To do this, just hold the headset over a piece of paper. The presence of an oil strip indicates that the system is working and that the saw chain is fully lubricated.
Drive sprocket bearings 16 ” or more in length are individually lubricated after 8-10 hours of operation.
Recommendations for the initial run-in phase
- The practice of running in a new chainsaw without a saw headset is fundamentally wrong, since all its moving elements need to be run in.
- The standard run-in time is several hours. In any case, the design of chainsaws of any quality and price level does not provide for prolonged engine idling.
- In this mode, the loaded parts of the piston group and the connecting rod-crank mechanism experience a significant lack of lubrication, which inevitably leads to overheating and forced wear of the working surfaces.
- The total running-in time at idle with periodic blow-by of 25-30 seconds should not exceed 15-20 minutes.
The operation of the engine being run in without load at high speeds is categorically excluded. over, idling running in the tool is ineffective; the best result can be obtained when exposed to moderate loads. The new chainsaw can be used for sawing medium-density wood with small diameters up to 100 mm.
Factory run-in benefits
It should be noted that new saws from many leading manufacturers do not need running-in. The running-in of the piston group and working equipment using a special technology is carried out directly in the process of control tests.
The chrome plating of the inner diameter of the cylinder and the application of wear-resistant coatings on the working surfaces of loaded parts helps to reduce the time of this stage. However, the sparing recommendations for the first few hours of tool operation remain valid.
Running in a chainsaw and other Stihl tools
Stihl chainsaw running in
The days of the first chainsaws (“Ural” and “Druzhba”) in our country are over. The times have passed with them when questions like “How to run in a chainsaw” were topical. Stihl does not require running-in. Absolutely! No. Even if you are told to test it by the uncles in the market where you buy it.
By the way, if you buy a Stihl tool on the market, it means 99.99999% that you are buying not Stihl, but its Chinese replica. Firstly, this tool is sold only at official points of sale, through the manufacturer’s website and a few sites of certified partners. Secondly, not a single company manager will tell you that you need to do a cold start and run in a Stihl chainsaw. Why? Let’s take a closer look below.
How to run in stihl gas powered tools
The chainsaw left the conveyor and was delivered to the workshop, where it was assembled, filled with oil and a fuel mixture, checked, turned on and. were fixed in a special running-in chamber of a gasoline-powered tool, which is located in the same place, at the plant, next to the conveyor. During the specified time, it undergoes a “hot” run-in until the components and mechanisms are fully lapped to each other. in fact, this is the purpose of running-in and the best way to run a Stihl chainsaw. Therefore, as soon as you purchase it, refuel and fill in oil. and immediately into battle! Work for 10-15 minutes, rest for 5 minutes, then 15-30 minutes, and rest again. After 3-5 tanks of gasoline, it will pick up maximum power, and it will be possible to work according to the data sheet time.
In addition, using the analogy just described, you cannot run in a Stihl lawnmower, or a Stihl brush cutter, or even run in a Stihl trimmer. Yes, other manufacturers may recommend such a run-in, but in this case, with Stihl, it will only be a waste of time and your resources (effort, fuel, oil).
If you want to run in a Stihl tool (whether it is running in a Stihl gas cutter, running in a Stihl asphalt cutter or something else), we can only recommend running in for grinding in parts that you changed after a planned replacement or as a result of repairs. For example, in a lawn mower, such a replacement could be subject to:
- cutting nozzles;
- engine belt or wheel drive belt;
- the shaft on which the knives are attached;
How do you run in a Stihl lawnmower in this case? Give it a gentle work for 30-60 minutes, get rid of especially tough stems of grass and debris, which usually leads to damage.
How to run in a Stihl blower
The blower is also called a garden vacuum cleaner. This is a very handy tool that in a matter of minutes can get rid of light debris and fallen leaves, after all, a garden plot (usually 30-50 sq.m.). Like other Stihl tools, it is factory run-in as required, so there is no need to run it in. Only in the first days of work, give him a reduced load, you cannot immediately let him “into battle” at 100%.
What types of engine running-in are
Correct engine break-in is essential to success. It is important to understand that there are several types of break-in:
- After a major overhaul. Running-in after a major overhaul assumes that all the engine components need to be rubbed in, since most of them change (usually, after a major overhaul, only the cylinder block and its head remain). That is, in fact, a new engine appears before the driver. It is better to run it in at a service center using special equipment;
- After a partial overhaul of the motor and replacement of some components. This includes running-in after replacing the piston rings. This running-in is carried out directly on the road. There are rules to follow and they will be discussed below.
It is worth noting that when an engine is overhauled in a “garage”, drivers often run in “combat conditions”, that is, on the road, without using special equipment. This is not entirely correct and can lead to a decrease in the resource of the motor.
When to run in after replacing piston rings
Installing new components in an engine always requires running-in. This applies not only to the piston rings. It is well known that running-in is required after an overhaul of the engine, or if the engine is completely new.
Husqvarna 480 CD chainsaw breaking in after rebuild
The running-in procedure itself implies that the components “rub” against each other. If the piston rings are replaced, they must be run in so that they rub against the piston or cylinder. Despite the fact that the dimensions of the parts are standard, they wear out during operation due to a number of technological features. Accordingly, by installing new rings in the engine, where the old parts remain, full size matching cannot be achieved. That is, it takes some time to run the engine in order for the parts to “get accustomed” to each other perfectly.
Engine break-in after replacing piston rings
Replacing piston rings is a procedure that will have to be faced if the driver has been using the car for a long time. On average, the service life of the rings is 80-120 thousand kilometers, depending on the driving style, as well as on the quality of the rings themselves and the assembly of the car engine.
After replacing piston rings, many drivers forget about the need to break in the car. This is an extremely important procedure that should not be neglected if you want to make sure that engine repairs and piston ring replacements are not wasted. In this article, we will consider how to run a car engine after replacing the piston rings.
How to run-in after replacing piston rings
Before starting the break-in procedure, the vehicle must be prepared. Several steps to take:
Charge the battery;
Experts recommend running in a car engine after replacing the piston rings within 1,500 kilometers. The running process itself should take place, on average, at 2500 rpm, it is better to perform it in third gear. These recommendations will optimize the process of “grinding” rings to the piston and cylinder.
The first 300 kilometers are best covered in one run. A country track is ideal for lapping. The next 1200 kilometers must be covered in the same mode, but it does not matter for how many trips, that is, the operation can be carried out in a comfortable and familiar schedule for the driver.
Important: After passing 1500 kilometers, it is imperative to replace the oil filter and oil.
Features of running-in tools from different manufacturers
Chainsaws from different manufacturers differ from each other in design, engine power and other parameters. Accordingly, the process of running in them also takes place taking into account the specific features of the tool. It should be noted that top manufacturers supply the market with fully prepared tools that do not need to be run in. Information about the operating modes, the need for running-in and other important points can be found in the instructions for this chainsaw.
Basically, running-in is required for domestic and Chinese chainsaws. It is produced in accordance with the stated rules and specific methods set out in the instructions.
Consider the nuances of performing the procedure for two popular models of chainsaws:
- STIHL MS-180 (Stihl). German chainsaws, known all over the world. The carburetor for these tools is shipped with the tool set in run-in mode. The fuel-oil mixture is made up in a ratio of 1:50; for a complete break-in, at least 5 full tanks will be required. It is strictly forbidden to start and leave the saw to work on the canvas! It has air cooling, which practically does not function in this mode.
For normal cooling, a flywheel operation is necessary, and this is possible only under a load, even a small one. After the end of the running-in, you should contact the service center to reconfigure the carburetor to the operating mode.
- CHAMPION (Champion). Chinese tools are difficult to repair and should be handled with great care. Break-in of Champion chainsaws is carried out on a fuel-oil mixture with a ratio of 1:50. It is necessary to use oil of the same brand name. CHAMPION JASO FD, since Chinese tools are sensitive to the quality of fuels and lubricants. The manufacturer requires running in until 6-8 full fuel tanks are used up. No special requirements, except for normal conditions. soft operation without prolonged loads at full engine speed.
Figure 4. Running in the “Champion” chainsaw
In order for the chainsaw to be accepted for warranty service, you must:
Important: if the chainsaw breaks down during the warranty period, the seller can carry out an examination of the tool. If the research reveals the use of low-quality gasoline or oil, warranty service will be denied.
- If, during the running-in process, malfunctions are found that have occurred through the fault of the manufacturer, you have the right to return the chainsaw if no more than 14 days have passed since its purchase. After this period, the buyer has the right to demand repair of the product;
After running in, some chainsaw owners adjust the carburetor.
Correct setting of the chainsaw
Running in a Patriot chainsaw after replacing the cylinder and piston
My VSP Group Partner Program. Connect!
Correct setting of the chainsaw. Preparing the gasoline saw for work
Before you start operating a chainsaw, you need to pay attention to several important points:
- installing the chain;
- fuel mixture preparation and refueling;
- chain lubrication;
- running-in (in case of working with a new tool).
Correct execution of each step will ensure that the chainsaw performs as expected and does not break the first time it is started.
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What is a chainsaw running-in for?
The chainsaw is a functional, useful device that is needed in a number of economic and industrial tasks. Many agricultural and forestry areas are not complete without a chain saw for harvesting and processing timber. But for good work for many years, you need to run the chainsaw in the first minutes of the device’s operation. These manipulations occur with each inventory from the newest purchase and are designed to grind all parts related to both the electric motor and the saw headset.
Thanks to easy processes, all tools, including Stihl saws, get the opportunity to work at a fairly productive pace during rolling, without early repairs or adjustments. Therefore, to say whether a running-in manipulation is needed, the right decision would be a positive answer, the main thing is that the correct processing of the tool is performed. Performing these steps is just as important as a precise fit of the chain, high-quality repairs to the power tool, or the need to purchase trimmer line from a responsible manufacturer.
Storing your chainsaw
A few words about conservation for the winter. Before sending the chainsaw to the shelf, you should follow these steps:
Clean the chainsaw and bar with chain.
2. Drain the remaining fuel from the fuel tank. After that, start the engine until it stalls by itself.
Cool down the engine (5-7 minutes). Then unscrew the plug and pour a small amount of oil for two-stroke engines into the plug hole.
Pull the engine start handle several times and reinstall the spark plug.
The air filter should also be cleaned and dripped with oil.
Store the instrument in a dry, ventilated area. Preferably at a temperature not lower than 1 degree Celsius.
For those who still have questions, we recommend that you familiarize yourself with the FUBAG video:
The nuances of running a Chinese chainsaw
Chinese chainsaws, in essence, are the same tools that have a two-stroke engine with an air cooling system.
This means that running in the engine and Chinese-made tool models is carried out by creating identical conditions as for tools assembled in Russia or Europe. I would like to note that the products of the well-known brand Stihl, and in particular the MS 180 chainsaw, have been produced by a Chinese plant for a long time, although the German brand.
As a rule, all models of Chinese chainsaws are equipped with carburetor adjusting screws, respectively, at the time of running-in, it is permissible to limit the maximum number of engine revolutions, thereby enriching the fuel mixture.
After running in, it is necessary to return the adjusting screw H to its original position, and check the maximum number of engine revolutions. Exceeding the maximum speed is unacceptable.
It is also permissible to increase the percentage of oil in the fuel mixture during the break-in period.