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How to sharpen a chainsaw chain

How to sharpen a chainsaw chain

Choose a round file suitable for repairing the saw chain. The cutting teeth, size, and arc of various types of saw chains are different. Each type of chain requires a certain round file standard. There are detailed instructions in the manual, and you must pay attention to them.

Pay attention to the direction and angle of the file. The file should be repaired in the direction of the cutting edge. When pulling back, it should be light. Do not use force back and forth as much as possible. Generally, the angle of the cutting edge of the saw chain is about 30 degrees, and the front is high and the back is low. The included angle is about 10 degrees. These angles vary according to the hardness of the material being sawed and the usage habits of the saw. At the same time, attention should be paid to the symmetry of the left and right cutting teeth. If the deviation is too large, the saw will run off and the saw will be oblique.

Pay attention to the height of the limit tooth. A part of the front of each cutting tooth protrudes, this is the limit tooth, which is 0.6---0.8 mm lower than the upper edge of the cutting edge, and the cutting amount per tooth is so thick. When filing the cutting edge, pay attention to its height. If the cutting edge is repaired more, the relative cutting edge of the limit tooth will become higher, and the cutting amount will be smaller each time, which will affect the cutting speed. If the cutting edge is lower than the limit tooth, it will produce no wood, Unable to cut, the limit tooth repair file is too low, and each tooth is too thick each time, it is likely to cause the "knife" and the saw will not move.

The maintenance of the saw chain

The saw chain runs fast. Taking a 3/8 saw chain as an example, the number of sprocket teeth is 7 teeth. When the engine speed is 7000 rpm, the running speed of the saw chain is 15.56 meters per second. The driving force of the sprocket and the reaction force during cutting are concentrated on the rivet shaft. The working conditions are bad and the wear is serious. If you do not pay attention to maintenance, the saw chain will be quickly scrapped.

Maintenance is carried out from the following aspects:

  1. Always pay attention to adding lubricating oil;
  2. Keep the cutting edge sharp and the symmetry of the left and right cutting teeth;
  3. Adjust the tension of the saw chain frequently, not too tight or too loose. After adjusting the saw chain, when the chain saw chain is lifted up, there is only one middle guide tooth that completely exposes the guide plate slot;
  4. Clean and clean the guide plate groove and the dirt of the saw chain in time, because the guide plate and the saw chain will be worn during sawing, and the worn-down iron filings and fine sand will accelerate the wear, and the gums on the trees, especially the grease on the pine trees. , During the sawing process, the heat and melting will adhere to the saw chain, making each joint sealed, hard, and oil can't get in, it can't be lubricated, and it will accelerate wear. It is recommended to remove the saw chain after daily use and soak it in kerosene for cleaning.
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Chainsaw chain types 1/4、0.325、3/8、0.404;

The saw chain is an indispensable part of the chainsaw. Without the chain, the chainsaw cannot work and cannot be called a saw. It's just an engine, but there are many people who don't know much about saw chains.

The composition of the saw chains

The saw chains are composed of left-cutting teeth, right-cutting teeth, middle guide teeth (also called driving teeth) connecting pieces, and rivets.

The model of the saw chain and the size of the saw chain

The saw chain is represented by Latin letters and Arabic numerals. Due to different countries and manufacturers, the meanings of each letter and number are different, but they all indicate the pitch, the thickness of the middle guide tooth, the shape of the cutting tooth.

The pitch is the center distance between the cutting teeth, the middle guide teeth, and the two holes of the connecting piece. On the same type of saw chain, their pitch (hole distance) is the same, and all are expressed in inches in the imperial system. The measuring tools we use are all metric and must be converted when measuring.

1 inch = 25.4 mm, if you want to calculate the metric size, multiply 25.4 and the size it represents. Example B3L, pitch: 25.4×0.404 mm; thickness of middle guide tooth: 25.4×0.063 mm.

The matching of the saw chain

Whether the saw chain and the chain saw the match, mainly depends on the chain wheel of the chain saw, the length of the guide plate, the form of the guide plate and the width of the guide plate guide groove, the pitch of the saw chain must be the same as the sprocket, the gear of the guide plate head (if it is toothed ) Keep the same, the thickness of the middle guide tooth is consistent with the guide groove on the guide plate, and the length is consistent with the circumference of the guide plate, the number of sprocket teeth, and the space distance between the sprocket and the guide plate.

The length of the saw chain

Take the B3 saw chain used for 18 inches as an example. The saw chain used is riveted into a circular ring. There are 30 left and right cutting teeth. There are 4 pitches between each two cutting teeth (the pitch of the cutting teeth is also counted), 0.404×4×30= 48.48 (inches) 1 foot = 12 inches, the data obtained is divided by 12 inches, 48.48 ÷ 12 = 4.04 feet, the length of this saw chain is 4.04 feet. (Multiply 2 for calculation with center guide tooth)

Each box of saw chains is 100 feet long. Different types of saw chains have different pitches, so the number of cutting teeth is different. The guide teeth in the connecting piece attached to each cutting tooth have 4 pitches. The calculation formula and data are as follows:

Type A: 100 (feet) ÷ (0.375×4÷12)=800

Type B: 100 (feet) ÷ (0.404 × 4 ÷ 12) = generally 744 (tooth cutting)

Type K: 100 (feet) ÷ (0.325×4÷12) = generally 924 (tooth cutting)

Type N: 100 (feet) ÷ (0.365 × 4 ÷ 12) = generally 822 (tooth cutting)

A normal saw chain, in order to prevent cutting deviation, should be left and right in pairs, that is, symmetrical, the number of teeth is even, the 100 feet issued by the manufacturer is not just an integer, and some are a little more for the given saw The chain cutting teeth are even numbers. However, some guide plates are not standard, the riveted saw chain cutting teeth must be odd numbers, two left (or right) cutting teeth on one side, plus the connecting piece and the middle guide tooth, then its total length is calculated by the middle guide tooth, There are two pitches for every two middle guide teeth (the pitch on the middle guide teeth is also counted), then its length is the pitch multiplied by 2, multiplied by the number of middle guide teeth, and then divided by 12.

Take K-chain, the number of guide teeth is 59 as an example:

0.325×2×59÷12=3.196 feet. The calculation method for other types of saw chains is the same, the difference is their pitch.

In addition, there are two data to remember: 1 foot = 12 inches, 1 inch = 25.4 mm

The repairing file of the saw chain

The left and right cutting teeth on the saw chain are cutting tools. After a period of use, the cutting edge becomes blunt. In order to cut smoothly and keep the cutting edge sharp, it is necessary to file.

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Top 10 wholesale websites you should know for sourcing cheap products in China

Today, everyone knows Chinese products are varied and cheap, Chinese online shopping has formed a complete ecosystem. Therefore, many sellers from Amazon, Shopify, and other online shopping platforms tend to source in China. Some of the sellers may have their Chinese sourcing agent, and some may purchase directly from Alibaba.com.

Information and communication are the crucial factors in sourcing

In fact, besides Alibaba, there are many Chinese websites that you can use as a source. I have made a top 10 list of wholesale websites below, which do not include world-known sites. Unlike Alibaba.com having integrated categories, some of the websites focus on particular industries targeting the domestic market, So, Chinese is the only language used on most of the websites. For easy reading, you are suggested to use Google Chrome with a translation plugin, which you can find and install from the Google Chrome application shop for free.

Here are the recommended sourcing sites in China:

  1. 1688.com

It is the Chinese domestic version of Alibaba.com, which covers the wholesalers in all categories. Mainly it targets the Taobao sellers and industrial buyers.

  1. toybaba.com

This site targets the wholesalers and factories of toys. You may find all the toys from this site and have contact with the wholesalers and factories. If you want OEM toy products, you will find the factory very easily.

  1. nala.com.cn

It is a makeup wholesale and retail site, the products on this site are basically produced in China and some are imported from Southern Korea and Japan.

  1. 17zwd.com

It is a clothing, dress, and fashion-related wholesale site. When you open its homepage, you need to choose your located city, because northern Chinese cities and southern Chinese cities are not in the same season. Then it will guide you to the most appropriate products based on your chosen location.

  1. yiwugo.com

You may have heard of the Chinese city Yiwu, where is believed as the wholesale center of everything you may need in the world. It is an English site and quite helpful for sourcing. My chainsaws products are also on it.

  1. bao66.cn

It is a wholesale site of bags, purses, and wallets. Most of the wholesalers are small firms or factories, even workshops. You can find the really cheap stuff here as long as you do not care about fake brands.

  1. pfhoo.com

It is a jewelry wholesale site. There are too many pieces of jewelry at super cheap prices, and you will enjoy shopping here and find more surprises.

  1. vipmro.net

If you need wholesalers and factories of hardware or tools, this is a good option. It covers nearly every hardware and tool you can find in China.

  1. 91jf.com

It gathers the wholesalers and factories of home textiles in China. Sheets, quilts, and everything used in the bedroom can be found at a good price here.

  1. k3.cn

A shoes wholesale site. There are too many products on it, you should check it out yourself. The wholesalers update by season very rapidly.

There are still many sites I did not put on the list and it does not mean they are not helpful, just because there are too many sites. And I will list them later on for you as references in your business.

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First Chainsaw-The General knowledge of Chainsaw

Chain saw, short for "gasoline chain saw" or "gasoline-powered saw", is a power saw used for logging and timber production. Repair is more complicated. Today I will tell you some knowledge about chain saws.

Features

  1. Mainly designed with a streamlined body, with embedded flat rear handle, comfortable to hold and more humane.
  2. Using advanced technology, the whole machine has low noise and smooth running sound.
  3. Good safety, equipped with a straight handle and an additional main handle for a firmer grasp.

Use occasion

It is used for forest harvesting, lumbering, branching, etc., as well as lumber yard production, railway sleeper sawing, and other operations.

performance

Chain saw products have many advantages, such as high power, low vibration, high cutting efficiency, and low logging cost. They have become the leading hand-held logging machinery in my country's forest areas.

The chain saw damping system uses springs and high-strength damping rubber to absorb the shock. The sprocket is in the form of spur gear, which makes the chain assembly more concise and convenient.

Excellent and reliable electric fire device, the oil supply system adopts an adjustable oil pump.

The super-powerful Creep 9200 chain saw can also be used for pruning large trees, retrieving large materials, and emergency rescue.

Two-stroke mechanical fuel mixing ratio

Generally, two-stroke machinery fuels are mixed with steam engine oil (the engine oil is the special engine oil for two-stroke engines), and the ratio is standard. The ratio of steam to engine oil is about 25:1, depending on the conditions of use. If it is not used for a long time High-speed operation, the concentration can be appropriately increased. If high-speed rotation is often maintained during use, the concentration should be appropriately reduced, and more oil should be added to ensure the normal lubrication of the internal running parts of the cylinder, but the muffler should be removed in time to remove the exhaust gas. The carbon deposits in the channel can prevent excessive carbon deposits from entering the cylinder body and causing the cylinder to be pulled.

Use of chainsaw

  1. Check the tension of the saw chain frequently, turn off the engine, and wear protective gloves when checking and adjusting. The proper tension is when the chain is hung on the lower part of the guide plate, the chain can be pulled by hand.
  2. A little oil always is spilled from the chain. The oil level of the saw chain lubrication and lubricating oil tank must be checked every time before work. The chain must not work without lubrication. If a dry chain is used, the cutting device will be damaged.
  3. Never use old engine oil. Old engine oil cannot meet the lubrication requirements and is not suitable for chain lubrication. Crepe chain saw adopts imported Origen chain, which is durable and powerful.
  4. If the oil level in the oil tank does not decrease, it may be that the lubrication delivery has failed, and the chain lubrication should be checked and the oil circuit should be checked. Passing through the contaminated filter screen can also lead to a poor lubricating oil supply. The lubricating oil filter screen in the pipeline connecting the fuel tank and the pump should be cleaned or replaced.
  5. After replacing and installing a new chain, the saw chain needs 2 to 3 minutes of running-in time. After running in, check the chain tension and readjust if necessary. The new chain requires more frequent operation than the chain that has been used for some time. Tension. When it is cold, the saw chain must be attached to the lower part of the guide plate, but the saw chain can be moved on the upper guide plate by hand. The transmission link cannot be pulled out of the chain groove, otherwise, the chain will jump and the chain needs to be re-tensioned.
  6. The chain must be relaxed after work. The chain will shrink as it cools, and a chain that is not loose will damage the crankshaft and bearings. If the chain is tensioned in the working state, the chain will shrink when it cools down, and the chain will be too tight to damage the crankshaft and bearings.

Fault handling

  1. If the chain saw has been refueling and stalling, working less vigorously, or overheating the heating machine, it is usually a filter problem. Therefore, the filter should be inspected before work. A clean and qualified filter should be pierced and bright for observation under the sunlight, otherwise, it is unqualified. When the filter of the chain saw is not clean enough, it should be washed with hot soapy water and dried. Only a clean filter can ensure the normal use of the chain saw.
  2. When the serrations of the chain saw become unsharp, you can use a special file to trim the serrated chain's teeth to ensure the serrations' sharpness. At this time, it should be noted that when using a file to frustrate, you must frustrate in the direction of the cutting tooth, not the other way around. At the same time, the angle between the file and the chain of the chain saw should not be too large, preferably 30 degrees.
  3. Before using the chain saw, you should add the chain oil of the chain saw. The advantage of this is that it can provide lubrication for the chain saw, reduce the friction heat between the chain saw chain and the chain saw guide plate, and protect the guide plate. It can also protect the chain saw chain to avoid premature scrapping.
  4. After the chain saw is used, the chain saw should also be maintained, so that the working efficiency can be guaranteed when the chain saw is used next time. The first is to remove the impurities in the oil inlet hole and the guide plate groove at the root of the chain saw guide plate to ensure the smoothness of the oil inlet hole. Secondly, clear the sundries in the guide plate head and add a few drops of engine oil.

Technical maintenance

  1. The running-in period of the newly manufactured machine is from the beginning of use until the third oil filling. Do not let the engine run at high speed without load during use, so as not to bring additional burden to the engine during the running-in period. In the running-in phase, all movable parts must be adjusted to each other, and there will be greater frictional resistance between the driving parts. Generally, the high branch saw engine reaches its maximum power after 5 to 15 oil fillings.
  2. After working at full load for a long time during the working period, let the engine idle for a short time to allow the cooling airflow to take away most of the heat so that the driving device components (ignition device, carburetor) will not cause adverse consequences due to heat accumulation.
  3. Maintenance of the air filter. Adjust the air door to the choke position to prevent dirt from entering the intake pipe. Place the foam filter in a clean non-flammable cleaning fluid (such as hot soapy water) to wash and dry. Replace the felt filter. You can tap or blow it lightly when it is not too dirty, but the felt filter cannot be cleaned.

Note that the damaged filter element must be replaced. When installing, pay attention to insert the felt filter into the filter housing with the marked side facing inward.

  1. Inspection of spark plugs. If there is insufficient engine power, difficulty in starting or idling failure, first check the spark plug. Clean the contaminated spark plug, check the electrode distance, the correct distance is 0.5 mm, adjust if necessary. To avoid sparks and fire hazards, if the spark plug has a separate connector, be sure to screw the nut onto the thread and tighten it, and press the spark plug tightly on the spark plug.

The chain saw needs to be repaired if there are minor problems. Don't let minor problems become major problems without repairing them. The most important thing about a chain saw is how you use it and how to maintain it. No matter how good the machine is, it will still be broken.

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What should I do if the chain saw engine only breaks out when it is cold? What should I do if the chainsaw stalls at high temperature?

If any garden tool has been used for a long time, there will be large or small failures. Whether the failure can be eliminated in time is directly related to extending its service life and maintaining good working performance. Take the chain saw as an example. When a chain saw fails, if you don’t understand anything and consult a professional whenever you have a problem, it’s too much trouble. However, if you know some common problems about chain saws, then, For simple faults, you can easily solve them. Below we will introduce to you the phenomenon of only breaking out but not starting when the cold machine of the chain saw is difficult to start and the situation of the chain saw stalling at high temperature. Let’s take a look.

Chain saw cold machine is difficult to start

When the chain saw was started, the engine only made a few bangs, and there was no continuous ignition. Repeated starting, the same is still true. Obviously, this will not be caused by the low compression force of the cylinder or the leakage of the crankcase, nor will it be the spark plug of the ignition system, the damage of the high-voltage wire itself, and the insufficient magnetic force of the magneto. Because of the insufficient compression force, the crankcase leaks, spark plugs, etc. And high-voltage line leakage, permanent magnet demagnetization, insufficient magnetic force, the engine is impossible to explode. If the fault is in the ignition system, if it is an engine with a contact magneto ignition, the fault is mostly from the loosening of the gold contacts, burnt or oil stains and deposits of oxide; it can also be the flywheel half-moon button and the contact rocker arm. Caused by broken spring, loose rocker arm of movable contact, etc. If it is a non-contact magneto, most of the coil connectors are in poor contact.

If the fault occurs in the fuel supply system, it is most likely that there is moisture in the fuel, air in the fuel pipe, and excessive lubricating oil in the mixed fuel or the mixture is too rich, etc., which will cause the ignition of the engine to be discontinuous when the cold engine is started. Because the specific gravity of water is greater than that of fuel, it is deposited at the bottom of the fuel tank. When the engine is started, the fuel in the original carburetor can only be supplied for a moment to burn and burst. After the water in the fuel tank enters the carburetor or the fuel pipe, it is cut off. With the normal supply of fuel, the engine immediately stopped erupting. In addition, too much lubricating oil in the fuel affects the rapid atomization of the fuel, making the mixture difficult to ignite, occasionally igniting, and not continuous. The fuel in the mixture is too rich, even if it can be ignited by a strong spark after entering the cylinder, it will soon be "drown" due to too much oil (that is, the center of the spark plug's center pole insulator and the space between the side poles are all filled with oil) . If there is too much fuel in the mixed gas or too much lubricating oil in the mixed oil, the exhaust gas discharged from the exhaust muffler must be thick black smoke during the explosion.

High temperature flameout of chain saw

The common symptom is sudden death and flameout after working for a period of time, and then it can't be pulled. It takes a while to catch fire. This happens again after working for a period of time, and it is more frequent when the weather is hot. The above is the common situation of chain saw flameout at high temperature. What should we do in this situation? First of all, we have to find out the reasons. The usual reasons and solutions are as follows:

1. Ventilation issues

Mainly because the crankcase and plastic parts are not well ventilated, resulting in poor ventilation of the carburetor parts and causing high-temperature flameout.

Solution: ventilation. For example, add an air deflector at the magnetic flywheel or open the channel between the magnetic flywheel and the carburetor on the crankcase, increase the ventilation, or replace the box cover and air filter cover with better ventilation.

2. Poor exhaust of muffler leads to high temperature

Solution: Clear the muffler or replace the muffler with a larger exhaust hole. (Note: A large number of holes does not necessarily mean faster rows. Double-hole large holes on the market will be better than three-hole small holes).

3. Low temperature resistance of carburetor

Solution: add heat insulation paper pad, ventilate, clean or replace the carburetor.

4. The coil/high voltage package is not resistant to high temperature

Solution: Replace directly.

5. Three parts of cylinder

At least one of the three cylinders, pistons, and piston rings is out of material.

Solution: Replace the chain saw cylinder.

6. Oil seal and negative pressure pipe (balanced air pipe) are not resistant to high temperature

The oil seal and the negative pressure pipe (balanced air pipe) are not resistant to high temperatures, and show air leakage when the temperature is high.

Solution: Replace the oil seal and negative pressure pipe (balanced air pipe) with good quality.

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Knowledge and tips of daily use and maintenance of lawn mowers

The normal use and maintenance of lawn mowers can prolong its service life. The basic composition, daily use and maintenance of lawn mowers are now introduced as follows:

  1, the composition of lawn mower

It is composed of engine (or electric motor), housing, blades, wheels, control armrests and other components.

  2. Classification of lawn mowers

(1) According to power, it can be divided into: gasoline-fueled engine lawn mower, electric lawn mower powered by electricity, and unpowered silent lawn mower.

(2) According to the walking mode during mowing, it can be divided into self-propelled, non-self-propelled hand-push and mount.

(3) According to the grass collecting method when mowing, it can be divided into: grass bag type and side row type.

(4) According to the number of blades, it can be divided into single blade type, double blade type and combined blade type.

(5) According to the blade cutting method, it can be divided into: hob type and rotary knife type. Generally commonly used are engine type, grass bag type, single-pole type and rotary knife type;

   3. Use of lawn mower

Before each use, the debris in the mowing area must be removed. Check the engine oil level, gasoline, air filter, tightness of screws, tightness and sharpness of blades. For the first time or in a cold engine state, close the damper first, press the fuel injector more than three times, hit the throttle to the maximum, and then open the damper after starting. When mowing the grass, if the grass is too long, it should be cut in stages, and only one-third of the total length of the grass can be cut at a time. The purpose is to avoid yellowing of the grass after the mowing; if the grass area is too steep, it should be cut along the slope. Grass; if the slope exceeds 30 degrees, it is best not to use the lawn mower; if the lawn area is too large, the continuous working time of the lawn mower should not exceed four hours.

4. The protection of the lawn mower after use.

First, clean it all: Second, check all the screws, oil surface, air filter, blades for defects, etc., and again, for the service life of the lawn mower, Strengthen the inspection or replacement of vulnerable parts. Periodic maintenance is more important.

  (1) Maintenance of engine oil

Before using the lawn mower, check the oil level to see if it is in the middle of the oil dipstick. The oil should be changed once in the first 5 hours, the oil should be changed once in the next 10 hours, and then the oil should be changed frequently according to the situation. When changing the oil, the engine should be in a warm state so that the old oil can be completely replaced. If the engine oil is too much, it will appear: difficult to start, or the black smoke is particularly large, or the power is small (too much carbon deposit in the cylinder, small spark plug gap), or the engine heat is too large. If the engine oil is too little, it will happen: the engine gear is loud or damaged, or the plug ring is worn out or damaged, or a pull-out phenomenon occurs, causing serious damage to the engine. Therefore, the maintenance of the oil is very important.

  (2) Maintenance of the air filter element Before and after each use

check whether it is dirty or not, and wash frequently. If it is too dirty, it will cause the engine to be difficult to start, black smoke, and low power.

  (3) Carburetor and oil circuit maintenance

Every time gasoline is added, it should be filtered by a filter and cannot be placed in the fuel tank for a long time. When the carburetor is cleaned, a special cleaning agent for the carburetor should be used. The cleaning cycle depends on the degree of dirtiness of the carburetor. If the carburetor fails, the engine cannot be started or the engine is turned off immediately after starting, it should be cleaned.

   5. Common troubleshooting

(1) The engine cannot be started

Reasons: no gasoline; spark plug wiring is off; throttle switch is not in the starting position; oil circuit is blocked; ignition is misplaced; spark plug is damaged. Remedy: add gasoline; connect the spark plug wire; turn the extraction door switch to the maximum: clean the extraction circuit; correct the ignition timing; replace the new spark plug.

(2) The engine is not running smoothly

Reasons: The throttle is at its maximum and the air valve is open; the spark plug wire is loose; water and dirt enter the fuel system; the air filter is too dirty; the carburetor is not adjusted properly; the engine screw is loose; the engine crankshaft is bent. Remedy: Lower the throttle switch; reconnect the spark plug outer line to ensure that it is firmly connected; clean the fuel tank and refill the clean fuel; clean or replace the air filter; re-condition the carburetor; check the engine screw after flameout; correct the crankshaft or Replace the crankshaft.

  (3) The engine cannot be stalled

Reasons: the throttle cable is not installed in the engine position; the throttle cable is broken; the throttle movement is not sensitive; the flameout line cannot be contacted: troubleshooting method: reinstall the throttle line; re-change the throttle line; drip a small amount of engine oil; check the flameout line or replace it.

  (4) The row of grass is not smooth

Reasons: the engine speed is too low; the grass is blocking the grass outlet; the grass humidity is too high; the grass is too high and too dense; the blades are not sharp. Remedy: Increase the throttle: remove the accumulated grass in the lawnmower; cut the lawn after it has water to dry; divide it into two or three cuts, each time 1/3 of the length of the cut; cut the grass after sharpening the blade.

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What can you do to fix when the chain saw engine vibrates too much

We all know that a chain saw is a device that uses a gasoline engine as power. When you get a chain saw, if you encounter a numb hand, shake your hand, or some parts are easily damaged or broken during the operation of the chain saw, then you need to pay attention to it at this time. It is not that the engine is installed on the equipment and the vibration is too large. Abnormal vibration has many hazards. It will make the operator easy to fatigue. Excessive vibration may cause fatigue and fracture of machine parts such as air filters, carburetors, fuel tanks, and engine bases.

General users do not have professional vibration measurement equipment to quantify the vibration value, but we can still judge by the following three methods.

(1) Feeling with hands: touch with your fingers to see if your hands shake;

(2) Listen with ears: listen to the mechanical noise of the entire device, whether there is any abnormal noise;

(3) Look with your eyes: Whether the engine muffler, air filter and other parts have obvious ghosting phenomenon, if some, it means that the vibration is large (you can choose Creep chain saws, lawn mowers of high quality and preferential prices).

If it is found that the engine vibrates very strongly within a certain speed range, you need to pay attention at this time. The engine and the equipment have a resonance phenomenon. When you encounter resonance, you don't need to worry, you can eliminate the resonance according to the following two methods.

1. The shock absorber is broken

High vibration of the chain saw is probably because the shock absorber is broken, and the shock absorber needs to be replaced.

2. Increase the shock absorption device

By adding shock absorbers to cushion the vibration of the engine and equipment. There are spring type, air type and rubber type of shock absorber. Among them, rubber shock absorber is easy to obtain and has cost advantages and is widely accepted. We need to be reminded here that some inferior rubber pads cannot be used to make cushions and install them under the engine, because as time goes by, the inferior rubber pads are easy to age, chip or fall off, causing the fixing screws to loosen when the engine is running. The parts are damaged or dangerous.

3. At the same time, incorrect ignition angle, low idle speed, poor engine combustion, and poor spark plug may cause excessive vibration of the chain saw.

The chain saw should be repaired when there is a small problem, and don't turn a small problem into a big problem without repairing it. I believe everyone knows what to do when the chain saw engine vibrates too much.

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The hazards of using full fueled chainsaw & How can you make chainsaw save gas??

When the chain saw engine is working, each moving part acts on another part with a certain force, and high-speed relative movement occurs. With relative movement, the surface of the part will inevitably produce friction and accelerate wear. Therefore, in order to reduce wear, reduce frictional resistance, and extend service life, a lubrication system must be installed on the engine.

The chainsaw gas pump assembly is a large part of the two-stroke chain saw lubrication system. It supplies oil to the high-speed chain and guide plate to prevent excessive heat generated by friction during work, which causes the chain guide plate to become too hot and reduce work efficiency. It includes oil pump, oil pipe, oil filter, one-way valve and so on.

Chain saw fuel supply system includes fuel tank, filter, fuel pipe, carburetor, etc. The carburetor is the core component of a two-stroke internal combustion engine. It uses the pressure difference generated by the crankcase to pump fuel from the fuel tank into the carburetor, sprays it from the fuel metering hole, and uses the venturi effect to fully atomize the fuel. Adjust the ratio of fuel and air to improve combustion efficiency.

The hazards of a chain saw full of oil

When refueling the chain saw, some people find it troublesome and often fill it up at a time. This is not good for the chain saw itself. The chain saw has a standard for refueling, not the more the better.

After the engine of the chain saw works, the gasoline will expand due to heat and mechanical vibration. If the fuel tank is overfilled, the gasoline will overflow from the fuel tank cap, which wastes fuel and can easily cause fires. So it can only be added to about 90% of the fuel tank volume.

When the oil in the oil pan is added too much, the oil will rush into the combustion chamber to participate in the combustion, which not only increases the oil consumption, but also easily causes speed accidents. In addition, too much oil will increase the resistance of connecting rods and crankshafts and increase power loss. Therefore, the oil in the oil pan should be added between the upper and lower engraved lines of the oil dipstick.

The oil in the air filter plate of the chain saw should be added to the engraved position. If it is added too much, the oil will be sucked into the cylinder to participate in the combustion, which will easily cause carbon deposits and cause oil runaway accidents.

The inner cavity of the wheel hub of the chainsaw is large, mainly for heat dissipation. If the wheel hub is filled with grease when the rolling bearing is installed, it will increase the running resistance and will also affect the braking performance due to the heat and the thinning of the grease. Therefore, it is enough to apply some grease on the rolling bearing to maintain "empty hub lubrication".

Filling up the oil with a chain saw will save trouble, but it will be counterproductive. Remember that trouble is often the source of trouble.

The choice of chainsaw fuel and chain oil

  1. How to choose the fuel of the chain saw and chain oil chain saw fuel?

Generally, unleaded gasoline above 90# and special two-stroke engine oil are mixed together.

SAE’10W-30 oil is basically used for chain saw chain oil. If it is divided by season, SAE’10W-40 is used in summer, and SAE’10w-20 is used in winter. It is recommended to use special oil, which can better protect the smooth running of the chain saw, extend the service life of the machine, and reduce the chance of pulling the cylinder.

Gasoline engine mixing ratio of 25:1 must use two-stroke special engine oil.

How does a chain saw save fuel?

  1. A light chain saw (displacement less than 78) is more fuel-efficient than a heavy chain saw (displacement greater than 78).
  2. How to save fuel for the new chainsaw. Choose a good carburetor. Under the same conditions, the oil consumption of the chain saw is too high. Adjust the carburetor or change the carburetor.
  3. How to save oil on old chain saws. Generally, there will be a gasoline filter and an air filter.

Regardless of whether it is for the gas saving of the chainsaw or the oil use, special attention must be paid to not only choosing the correct oil, but also adding an appropriate proportion of the oil according to the requirements, so that the correct operation can work better. If you have any questions about the use of the chain saw.

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Yu Qiran Products

How to install the knapsack lawn mower and the instruction to use it

Installation method of knapsack lawn mower

  1. Adjust the position of the front handle according to actual use before installation
  1. Install the protective plate and fix it firmly to ensure safety
  1. Install the blade and place the blade in a suitable position on the block
  1. Install the pressure plate
  1. Install the protective cover
  1. Find the correct location
  1. Use a wrench for positioning
  1. Use a sleeve to fix the nut (counterclockwise)
  1. Align the positioning hole of the flexible shaft with the positioning pin, and pull out the positioning pin
  1. Put back the positioning pin, rotate or pull the flexible shaft to ensure complete positioning
  1. Install the flexible shaft positioning groove into the joint
  1. Align the positioning slot of the flexible shaft with the positioning hole of the screw
  1. Screw in the screws and pull the flexible shaft to ensure complete positioning
  1. Install the throttle cable and the circuit flameout cable, and install the throttle cable into the quick-connect positioning slot
  1. Install the throttle cable and install the flameout cable

Precautions for the installation of the backpack mower

Adjust the throttle cable to an appropriate position to ensure correct idle speed and high-speed throttle;

The blade is firmly fixed, check before each use;

After the flexible shaft has been used for a period of time, grease must be added.

Use of knapsack lawn mower

  1. Check whether the flameout wire is connected properly.
  1. When starting in a cold environment, turn the choke lever to the "OFF" position; if the ambient temperature is high or in a warm state, turn the choke handle to the "ON" position (that is, the position during normal use) .
  1. Pump oil: Pump oil to the carburetor until the fuel can be seen flowing out of the oil return pipe.
  1. Gently pull the starter handle until you feel resistance, and then pull it continuously to start the gasoline engine. Notice! Rough pulling of the starter is not allowed, because discontinuous pulling will cause discontinuous ignition of the spark plug and the machine cannot be started.
  1. Turn the choke lever to the "ON" position gradually, and heat the engine until the machine runs smoothly.
  1. Adjust the throttle handle and control the size of the throttle so that the brush cutter can reach the appropriate speed for weeding operations. During operation, be sure not to pull the starter handle, because high-speed rotating parts may damage the starter.
  1. Stop: First turn the throttle handle to the low speed position, and then turn the stop switch to the "OFF" position to stop the machine.

Second, the specific operation method of the knapsack lawn mower

  1. When mowing the grass with the mowing head, ensure that the nylon rope of the mowing head extends 5-10cm outside the mowing head. If it is too long, the service life of the gasoline engine will be affected due to the heavy load, and the grass guard will be damaged. ; If it is too short, it will reduce operating efficiency.
  1. After the nylon rope is worn and shortened, in normal use, as long as the mowing head gently touches the ground, the nylon rope will automatically stretch out. If the length is not enough, you can repeatedly touch it several times until the nylon The rope length is 5-10cm. After the nylon rope is used up, the cutter head can be disassembled, and the new nylon rope can be wound on the rope wheel and installed back.
  1. When cutting grass with a blade, do not extend the entire blade into the grass. For general lawns, extend into 1/2 of the diameter of the blade. For grass with hard stems, extend into 1/3 of the diameter of the blade. Can.
  1. When cutting shrubs with a blade, generally shrubs should be cut along the periphery of the shrubs in the same horizontal plane. When cutting thick shrubs, you should first cut a hole in the direction where the shrub fell. The depth of the cut is 1/3 of the diameter of the shrub. Left and right, then cut off the bush from the other side of the bush. This cutting not only ensures that the blade will not be clamped during the cutting process, but also controls the direction in which the bushes fall
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Yu Qiran Products

What should you do if the chainsaw stops working? Tips of using chainsaw properly

Tips of using chainsaw

Gasoline chainsaws are abbreviated as chainsaws. They are generally used for forest harvesting, lumbering, branching, etc., as well as lumber yard production, railway sleeper sawing and other operations. The sawing mechanism is a saw chain, and the power part is a gasoline engine, which is convenient to carry and easy to operate, but the maintenance and repair are more complicated. If the chain saw has been refueled and stalled, it is not working so vigorously, and the heating machine is overheated, it means that the chain saw is broken. The following aspects describe in detail how to repair the chain saw when it fails:

  1. Before the chain saw works, let it run at low speed for a few minutes, and watch the chain saw to lubricate the chain oil to the oil line before starting to work. When working, the throttle can be set to use at high speed. If you don’t finish 1 tank of oil, you need to rest for a period of time, roughly 10 minutes. After the work is completed, the heat sink of the lower chain saw needs to be cleaned to ensure the normal heat dissipation of the machine.
  2. The air filter of the chain saw needs to be dusted every 25 hours. If you encounter special circumstances, you can deploy it by yourself. The foam filter element can be cleaned by washing liquid or gasoline, and then cleaned with water, squeezed to dry, and then soaked in oil, squeezed out the excess oil to install.
  3. When using a new chain saw, pay attention to the tightness of the saw chain, so that it can push the saw chain to rotate, use a hand-held saw chain, and the guide teeth are parallel to the guide plate. After a few minutes of use, pay attention to observe again, and repeat this several times. .

When using a chain saw, make sure that there are no creatures within 20 meters around, and check whether there are hard objects, rocks, etc. on the grass to ensure safety. When the chain saw needs to be left unused, clean the body, drain the mixed fuel, and burn out the fuel in the vaporizer; remove the spark plug, add 1-2ml of two-stroke engine oil to the cylinder, pull the starter 2-3 times, and install it. Put on the spark plug.

  1. If the chain saw is refueling and stalling, working less vigorously, or the heating machine is overheated, it is usually a filter problem. Therefore, the filter should be inspected before work. A clean and qualified filter should be pierced and bright for observation under the sunlight, otherwise it is unqualified. When the filter of the chain saw is not clean enough, it should be washed with hot soapy water and dried. Only a clean filter can ensure the normal use of the chain saw.
  2. When the serrations of the chain saw become unsharp, you can use a special file to rest the teeth of the serrated chain to ensure the sharpness of the serrations. At this time, it should be noted that when using a file to frustrate, you must frustrate in the direction of the cutting tooth, not the other way around. At the same time, the angle between the file and the chain of the chain saw should not be too large, preferably 30°.
  3. Before using the chain saw, you should add chain oil to the chain saw. The advantage of this is that it can provide lubrication for the chain saw, reduce the frictional heat between the chain saw chain and the chain saw guide plate, and protect the guide plate. It can also protect the chain saw chain to avoid premature scrapping.
  4. After the chain saw is used, the chain saw should also be maintained, so that the working efficiency can be guaranteed when the chain saw is used next time. The first is to remove the impurities in the oil inlet hole and the guide plate groove at the root of the chain saw guide plate to ensure the smoothness of the oil inlet hole. Secondly, clear the sundries in the guide plate head and add a few drops of engine oil.

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