Having dismantled the candle from the mine, we measure the gap of the chainsaw candle between the central and side electrodes. If its value is excessive (more than 0.7-1.5 mm), a spark may occur periodically, and if it is minimal (less than 0.7 mm), it may be insufficient for optimal ignition of the fuel mixture.
If gasoline enters the combustion chamber, and no inconsistency in the ignition system has been identified, the carburetor may be the likely cause of failure. This unit is designed to mix fuel with air and supply them to the cylinder. After dismantling the carburetor, we clean its channels and jets using universal tools.
It must be remembered that the carburetor consists of many small parts, and therefore its dismantling, disassembly and cleaning require special care.
After diagnosing the ignition system of the chainsaw calm 180 and its restoration, we proceed to troubleshooting the power unit, namely in the saw cylinder-piston group.
During operation, parts of the cylinder-piston group of the saw fail due to friction forces, high temperatures and loads. If the tool does not reach full power at startup and stalls at idle speed, a possible problem could be damage to engine parts. To disassemble the power unit, it is necessary to unscrew 4 bolts and remove the cylinder. The owner is required to carefully inspect its inner work surface for chips, nicks and cracks.
Even the slightest damage to the "mirror" of the cylinder can negatively affect the compression of the chainsaw engine and its performance.
When diagnosing an internal combustion engine, we also perform a visual inspection of the piston and compression rings. Made of aluminum alloy and cast iron, respectively, they are more exposed to abrasion loads than a steel cylinder. In case of breakage and excessive wear of the piston rings, they must be replaced.
If, upon visual inspection, the ovality of the cylinder working surface is observed, it will need to be bored. To do this, we measure its diameter over a larger size, select the piston and perform the subsequent machining.
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In the process of sawing wood, the cutting part of the tool is subjected to high loads. In order to reduce frictional forces and the subsequent wear of the chain, the chainsaw calm is equipped with a lubrication system that gradually supplies oil to the tire. The rapid loss of cutting properties by the teeth and the absence of traces of lubricating fluid may indicate its leakage or clogging of the pipes.
Stihl 180 chain lubrication principle
First of all, when diagnosing the chain lubrication system for the ms 180 chainsaw, we pay attention to the oil supply hoses and their fixation points.Damaged connections cannot be repaired and must therefore be replaced. The oil channels can be cleaned with compressed air. For these purposes, we use a compressor or an ordinary car hand pump.
Due to its ease of operation and repair, the chainsaw of this model has gained wide recognition among professionals and amateurs in the field of woodworking.
The Stihl chainsaw is a tool that is designed for harvesting wood, processing plants, creating landscaping and other household needs. In the event of a breakdown of any parts or failure of the device, you will need to repair the Stihl chainsaw.
The chainsaw must be used according to the operating instructions, then it will last a long time and will not fail. All possible malfunctions of the Stihl chainsaw can be identified and eliminated independently. Consider the main problems that may arise in the components and design of the device, and how to repair the Stihl 180 chainsaw with your own hands.
If you notice that Calm is pouring a candle on the Stihl chainsaw, then a malfunction may have occurred in the fuel system. The engine must run on a mixture of gasoline and oil. If the mixture is lean, then there is a decrease in power, the cylinder overheats and the saw systems wear out. A wet plug on a Stihl chainsaw is due to a disproportionate fuel mixture. Lack of air in the mixture prevents correct combustion of the emulsion.
The use of low quality gasoline can lead to engine wear.
Oil plugging of the spark plug also causes the use of oil for 4-stroke engines and piston wear. If such a malfunction occurs, it is necessary to remove the gas tank cap and adjust the fuel supply. The air intake should be repaired. The clogged filter must be blown out with air, or it is better to replace it. How you can clean the filters is described in the instruction manual for the chainsaw.
It will be possible to determine the quality of the mixture using a spark plug insulator. If a brown color appears on it, this means that the quality of the mixture is normal. White color or soot indicates a poor or over-enriched composition of the mixture.
The candle is the cause of oiling. Interruptions in spark formation are observed when the gap is incorrectly set. In the instructions for the repair and operation of the device, the distance between the contacts of the spark plug is given. If you do not have such data, then you can set 0.7-1 mm.
If the gap is smaller, then the efficiency of ignition of the mixture decreases, if it is larger, then interruptions in the formation of a spark occur. To eliminate the over-enrichment of the mixture, the motor is purged. In this case, you need to remove the candle and turn the crankshaft several times with a manual starter.
When repairing a chainsaw, you will notice that no oil gets on the chain. If the chain is not lubricated, then there are interruptions in the lubrication system. There are such malfunctions:
The chain is dry, light in color.
The chain stretches too quickly.
The tire is too hot and the paint has melted on it.
Oil does not drain in the tank.
With a sharp chain, the saw has become worse to cut.
Such signs indicate that there has been a violation of the lubrication process. To check the oil supply to the lubrication unit, you need to remove the tire and turn on the chainsaw. Then increase the speed and observe the end point of the oil line. If the oil is running, it means that its volume is not enough for proper lubrication. If there is no supply, you need to clean the filter. You should also adjust the oil flow. In the absence of malfunctions, further diagnostics and do-it-yourself repairs are required. If it turns out that the substance is not being supplied, then the oil system is repaired.
Consider the main malfunctions and methods for their elimination:
Broken oil hose. This can be seen on examination. In this case, the hose must be replaced.
If there is no thread on the shaft of the oil pump, then it should be replaced.
If there are defects in the thread, then it must be replaced.
If there is no main shaft corkscrew, then a nail of the same diameter can be installed in its place.
The filter might be clogged. This happens frequently with the Stihl MS 180. You can wash it off with gasoline. If this does not correct the problem, then the filter should be replaced.
The Stihl 180 chainsaw often has a depressurization of the oil line. This occurs where the oil line from the tank is inserted into the tool body. A breakdown can be detected by oil leaks at the bottom of the saw.
To fix the problem, you need to remove the saw handle, pull out the hose. After that, you need to clean the hose. Then apply sealant to it and place it in the tool body.
If the chainsaw does not start, then the cause may be a breakdown of the ignition and engine start unit. If, when measuring the gap between the module and the flywheel, no deviations are found, then the spark plug should be checked. It is pulled out of the shaft and the gap is measured. If fuel enters the combustion chamber and there are no breakdowns in the ignition system, then the carburetor is faulty.
If the saw does not maintain idle speed, then the following may have happened:
clogged filter;
violation of the ignition system;
the carburetor has deteriorated;
parts of the motor are deformed.
For self-repair, you need to follow these steps:
Flush or replace fuel hose.
Clean the filter.
Check the quality of gasoline and oil.
Check the operation of the carburetor and spark plugs.
When the Stihl chainsaws are repaired, they will work correctly.
If the saw is not gaining momentum, then this could lead to:
faulty engine;
cylinder wear;
failure of piston rings;
breakage of the spark plug;
coil malfunction;
unbalanced carburetor screws.
If, after testing, no defects are found, then the carburetor is checked.
In order to repair the device, it must first be disassembled. You need to remove the side cover, saw chain and bar. Then clean the instrument, blow it out with a compressor and clean all the assemblies with a brush. Then remove the handle. To do this, remove the plugs from the shock absorbers using a screwdriver. After that, remove the shock absorbers and the handle.
Then the starter is removed. Remove the housing cover and unscrew the starter screws. The part is removed. Then remove the flywheel by unscrewing the nut that holds it, unscrew the flywheel nut. You need to twist to the left. Remove the flywheel. Then dismantle the clutch, oil pump drive and carburetor.
After that, the motor is removed and disassembled. It is held by 4 screws on the bottom of the saw. You need to unscrew them and remove the motor. Then the engine itself is disassembled. Unscrew the crankcase screws, remove it. Then dismantle the crankshaft, oil seals, bearings and piston rings. At the end of the disassembly, repairs and troubleshooting are performed.
After repair, the tool will need to be reassembled. To do this, install the piston on the connecting rod. The arrow on it should look along the chain, and to the left of the piston there will be the side of the crankshaft in which you want to mount the flywheel. They put the piston in the cylinder. Install the bearings, seals and circlip into the cylinder. After that, degrease the place of fixing the crankcase and install it in its place. When reassembling, observe the reverse sequence for dismantling.
Remove the drive sprocket before unscrewing the clutch. Remove the corkscrew washer and remove the sprocket and needle bearing. Unscrew the clutch. Remove the baffle plate and pump.
Chainsaw sprocket replacement is needed when:
jams the movement of the chain;
the drive sprocket has worn out.
To replace, you need to remove the chain saw sprocket. The sprocket teeth must not deviate from the required dimensions, otherwise the saw operation will be accompanied by vibration, which will lead to damage to the crankshaft and bearings. The lifespan of the sprocket is 2 times that of the chain. Use 2-3 chains until the cutting surface is abraded. After that, change the asterisk. It is located behind the clutch.Remove the clutch cover.
Remove the bar, chain, and clutch. But first you need to fix the crankshaft. Then the stripper is placed in the hole of the sleeve and turned clockwise. Remove the clutch. There is an asterisk behind it. Now it is being dismantled. If it is defective, it is replaced.
Consider how to change the oil pump. If the element leaks, then the gasket between the two parts should be renewed. If this part of the oil pump is not damaged, then it must be wiped and put back. Now they check the hose. There should be no cracks on it. If the hose is damaged, replace it. Then the outlet channels are cleaned with a compressor.
Consider how the diagnosis and replacement of the piston group is carried out. It is necessary to check the condition of the cylinder and the degree of piston wear. After dismantling the motor, unscrew the pallet, remove the crankshaft with the piston from the cylinder. Unscrew the piston pin stoppers. If the piston is defective, it must be replaced. Retaining rings are fixed with a cut down. Before installing the piston group in the cylinder, the piston is lubricated with oil. Before installing the crankcase, degrease its surface and apply a sealant.
It is necessary to set the ignition on the chainsaw. The ignition is adjusted as follows:
turn out the candle and evaluate its appearance;
specify the distance between the magnets and the coil (up to 0.2 mm);
check the spark.
The carburetor is adjusted on a warm engine. If the engine fails to tune, the carburetor stuck could be the cause of excess gasoline in the mixture. To remove the part, it is necessary to unscrew the fastening nuts, disconnect the ignition and the rod from the engine control lever. Then the lever is removed. Then you can remove the filter and carburetor.
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The muffler is secured with two nuts. You need to untwist them and pull the muffler towards you. Then the screws of the coil are unscrewed and dismantled. At the Stihl saw, the carburetor has 1 idle speed adjustment screw. If the idle speed is violated, then the carburetor needs repair. This is a complex process and difficult to do on your own. Contact a repair shop.
Remove the side cover. Inspect the inside of the protective casing. If there is no damage, check the launch unit. Unscrew the starter bolt and remove the spring. Diagnose a pulley with a cord. If the rope is intact, then each part of the launch mechanism is checked:
The starter cord is made of synthetic material and will gradually wear out. If it is damaged, cracked or torn, it must be replaced.
Home »How to Replace the Starter Cord for the Stihl 180 Chainsaw
Calm 180 Chainsaw Repair: Troubleshooting and Troubleshooting
The Stil MS 180 chainsaw is considered one of the most reliable among the models in its segment. But the technique. this is a technique, and sometimes there are malfunctions for which you may need to repair stihl ms 180.
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You will learn more about the repair of units by reading the article.
This is the very first question that arises from the owner of the 180 chain saw, which for some reason has ceased to function normally. The answer to this obviously won't work. It is correct to say: it is possible, but is it necessary? To repair a chain saw in a service center, of course, costs more than trying to solve the problem yourself, but using the services of specialists, you get guarantees and confidence that the chainsaw will be correctly adjusted and adjusted. In general, the choice is yours.
Another small nuance regarding the choice of repair or not is that in order to diagnose a chainsaw and its further disassembly and repair, it is necessary to have certain tools and a certain knowledge of the saw design. Otherwise, you won't even be able to unscrew and remove the flywheel without damaging it.
When carrying out self-repairing saws, very often the aluminum fan blades located on the flywheel are cut off.This is due to the fact that when disassembling, do not use a special crankshaft crankshaft, but try to fix it by installing a screwdriver between the saw body and the flywheel blades, which leads to dire consequences. The flywheel nut has a serious torque and the blades are fragile and unable to withstand such forces.
To carry out a high-quality repair of a 180 mm forks yourself, you will need to:
air compressor (for cleaning the chainsaw and blowing out the main components and assemblies);
a vacuum gauge is necessary to check the tightness of the crankcase and carburetor, as well as to identify defective oil seals;
a locking piston to restrict the movement of the crankshaft;
an electronic tachometer to properly adjust the carburetor chainsaw;
T-key STIHL Torx 27 or equivalent;
crankshaft bearing puller.
Only with these tools, which repair the 180 chainsaw calmly with your own hands, can you do it quite well.
Common disadvantages to the peace of mind of a chainsaw may include:
Breakage of the starter cord;
Drive sprocket wear;
Leaks in the oil supply system for chain lubrication;
Wear resistant oil pump;
Air intake through oil seals in the crankcase;
No spark on the spark plug;
Lack of fuel supply in case of malfunctions in the carburetor (we will not dwell on them, as for repairing and adjusting a chainsaw, the issue is wide enough and will be discussed in a separate article);
Breaking of the protrusions of the seat under the engine control lever.
Now let's look at the malfunctions in more detail and start with the repair of the oil pump.
In the absence of oil supply for chain lubrication, it is necessary to diagnose the entire system and determine the reason why oil is not supplied. There may be several main reasons:
Clogged oil filter or oil system;
No threads on the worm gear oil pump;
Litter or malfunction of the pump itself;
Depressurization of the oil system (oil will leak at the bottom of the chainsaw).
To check the threads on the worm drive oil pump, take the drive chain and unscrew the clutch. For this purpose, the spark plug is unscrewed, and a piston stopper is installed in its place, which ensures reliable fixation of the crankshaft of the tool from turning.
The cover is then removed from the bar side of the Calm 180 chainsaw, and with a screwdriver, the retaining ring is held in place while holding the drive sprocket, after which the sprocket itself is removed.
Thus, the windshield chain sprocket 180 is replaced if necessary.
The clutch is unscrewed with a 19 head and wrenches. Unscrew the sleeve clockwise as the thread is left. There is a reflective plate behind the sleeve, which must also be removed. Next detail. worm drive of the oil pump. Having examined and found the absence of a filament, you can safely discard the part and install a new one, because its restoration is impossible. Chainsaw assembly. Rack 180 is performed in the reverse order.
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If the gear is in good condition, the saw is still disassembled, the spin is removed from the shock absorbers, the rear handle is unwound and the throttle control bar is disengaged, after which the handle block is removed from the shock absorbers using a heavy-duty slotted screwdriver.
Remove the handles to access the bottom where the oil pump is located.
In the next step, the oil hose coming from the oil tank is removed from the seat on the housing and the line is checked for blockage by supplying air through the oil hose to the oil tank housing.If a blockage is found, it must be cleaned, if this is not possible, the defective hose must be replaced.
The oil pump is then removed from the body of the Calm 180 and flushed with gasoline.
Typically, oil pumps are quiet and rarely require replacement. Basically, the reason for the lack of oil supply to the blockage, so after flushing and checking the crank pump gear, you can be sure that after reinstalling the chain saw 180, the oil supply problem will disappear.
After the repair, the Stihl 180 chain saw is assembled in the reverse order. An important point is the sealing of the oil hose at the installation site, in the body seat. It is necessary to rinse the hose and the hole for its installation with gasoline, then blow it with compressed air until it is completely dry and apply with a sealing oil-resistant sealant, and then replace it.
Frequent breakage of chain saws. The calm that occurs due to operator error is a malfunction of the engine control mechanism. More precisely, when the control arm seat breaks due to its design, in order to solve this problem, you will need to replace the saw body, which is quite difficult to do on your own. Let's take a look at the DIY repair algorithm that is used to replace the chain saw:
The body is released from the handle block;
To this end, the starter is removed, the fuel caps and oil tank are removed, and the screws for securing the starter are unscrewed;
In addition, a piston stopper is installed through the hole for the spark plug in the cylinder, the flywheel is unwound and removed from the engine shaft;
The drive sprocket is removed and the clutch unwinds;
Two nuts are twisted by 8 mm, holding the air filter housing and carburetor, the modules are removed from the seats;
In the next step, the 4 screws holding the motor to the housing are unwound. In the case of the 180 chain saw, special sleeves are installed in the place where the engine mounting screws are installed, which can fall out and get lost on their own.
Last moment. deletion oil pump , rubber carburetor elbow and fuel and oil tanks.
Install the parts in the new housing in reverse order. In parallel with the elimination of the main malfunction, you can check the rubber carburetor elbow, the part that has exhausted its life and has lost its elasticity must be replaced.
How to repair a chainsaw 180 if the packaging needs to be replaced? It is necessary to disassemble the engine, for which you first need to remove it from the chainsaw. Removal is carried out using the algorithm described in the paragraph: "The control button of the chain saw broke 180" calm down "- how to fix".
After removing the engine, the 4 screws securing the engine tray are unscrewed, after which it is removed. Thus, by removing the sump, we gain access to the oil seals and bearings of the crankshaft.
An important point in replacing the oil seals is to reinstall and seal the sump.
The chainsaw is an indispensable tool in the construction and procurement of firewood. Correct use with moderate work ensures long tool life without breakage. However, troubles can arise completely unexpectedly and a serviceable chainsaw loses its performance, and the malfunction can be completely trifling.
The repair of a chainsaw starter after a break in the starting cord is presented. Without the starting cord, the chainsaw becomes completely inoperative, there is no other way to start the tool. The repair was examined using the example of the Partner P350S chainsaw, a tricky reliable start of this saw requires pulling the starting cord at least 4-5 times in order for the saw to work, therefore, probably, the first malfunction was in the cord break. The cord does not break immediately, first the protective stocking of the cord threads breaks and prevents the saw from starting. It is better not to wait for all the threads to break and fix the cord in advance.It is not necessary to invent anything, repairs should not cause difficulties, but exact observance of the assembly conditions is necessary. A step-by-step instruction with a scheme of actions with photos and videos is given below.
1. Unscrew the three screws securing the starter cover. The included spark plug wrench with a straight screwdriver will work fine for this process, but it's best to use a normal tool to speed things up.
2. Remove the starter. The chainsaw is equipped with a soft-start mechanism, it is located above the cord reel.
3. Unscrew the screw securing the soft start mechanism and the starter coil. Be careful not to lose the washer!
Almost all leading manufacturers of chainsaws complete their products with starters of a similar principle of operation. It is no coincidence that specialized stores offer universal starter designs that are equally successful for both Shtil, Husqvarna, Makita chainsaws, and for Chinese semi-official fakes under the named trademarks. Only domestically produced chainsaw starters (Lesnik, Ural and a number of others) have some features.
The principle of operation of a starter for a chainsaw is as follows. A handle is installed in the groove of the body through which a cable is passed. If the handle is lifted sharply, the cable is pulled out and engages the drum of the ratchet mechanism, which transfers the movement to the drum with splines provided on the shaft. In this case, the crankshaft makes several revolutions, and the working mixture in the space between the piston and the cylinder head is compressed. Accordingly, when the handle is lowered, contact between the ratchet and the splines is lost and the shaft stops.
With an increase in engine volume, the required amount of the fuel-air mixture required for its subsequent ignition also increases, so the number of jerks for the starting cable for high-power saws increases. Therefore, in order to accelerate the return of the drum, unwanted return springs are used, made of steels with high elastic properties.
Facilitation of starting the chainsaw is implemented in the following ways:
By preliminary enrichment of the working mixture, for which there is a special damper in the carburetor design.
Installation of an automatic decompression valve, which reduces the working pressure in the chainsaw cylinder.
Installing an additional spring, which, during the movement of the cable, facilitates the unwinding of the crankshaft.
The presence in the design of some chainsaws (for example, Partner S series, Maxcut, etc.) a primer - a pump that provides preliminary fuel pumping.
With frequent starts of the chainsaw, some parts of the starter are constantly subjected to dynamic loads. As a result, the cable may burst, several ratchet teeth crumble, and the shaft will turn at a much lower speed. Therefore, the revision and even repair of the starter are operations that are sometimes carried out several times per season.
When pulling it out, the rope is constantly rubbing against the starter housing. To replace, disassemble the body of the unit, and carefully raise the ratchet drum so as to prevent the return spring from jumping off its seats. It is better to do this work together: the assistant fixes the spring while the cable is being replaced. After fixing the cable in the handle and in the grooves of the drum, the cable is wound around the roller, and the body is assembled.
VIDEO If the material of the starter spring is found to be of poor quality, the spring will burst (usually at the point of its attachment to the drum, where it forms a loop). In this case, it is not worth replacing the spring.Thoroughly clean its surface from dirt and traces of grease, carefully grind the place of destruction, and then release the spring at 600 ... 650 ° C (the steel of the spring should acquire a crimson color). It is necessary to cool the spring slowly, and at 100 ... 150 ° C it is already possible to carefully wrap its end in the shape of a restrictive protrusion on the inner surface of the drum (steel will acquire the necessary plasticity) and insert it into place. The elastic properties of the spring will not change.
Fitting the starter spring into the correct groove is not easy, even for an experienced user. First, the spring should be twisted to the previous diameter and installed in the cavity of the drum hub. The outer end of the spring is fixed by the restrictive protrusion, and the outer end with a screwdriver should be positioned opposite the hole in the lock. The loop at the inner end of the spring is aligned with the hole with a screwdriver, after which the disc is lowered. Rotate the disc to check if the ratchet dog has come into place. Next, the ratchet itself is assembled.
After installing the spring, it is necessary to adjust its tension. To do this, a cable is inserted into the groove on the circumference, and a return spring is twisted around it. After removing the slack, it is best to wind the spring an additional few turns to ensure the required tension on the part.
Repairing the ratchet itself at home is not recommended, since many operations will require the use of a CNC machine. It is easier to purchase a new unit in specialized stores.
VIDEO In the design of the chainsaw, the starter is responsible for the proper starting of the engine of the tool. Over time, owners of chainsaws are faced with the need to repair this important unit. And, the sooner it is possible to eliminate the malfunction, the less other important parts and mechanisms of the tool will succumb to wear.
With an increase in the power of the chainsaw, the amount of the fuel mixture increases, which should ignite when the chainsaw is started. In such a case, the number of jerks of the starter cord must be increased to start the engine. To speed up the return of the drum mechanism, manufacturers use a special steel starter return spring with excellent elasticity. Leading brands are using other methods to make it easier to start a chainsaw:
Pre-enrichment of the fuel mixture using a separate flap;
Installation of an automatic decompression valve, which reduces the pressure inside the cylinder of the chainsaw;
Installing a primer designed to pump fuel before starting the engine.
The use of one of these technologies greatly facilitates starting and extends the life of the starter, which is especially noticeable at low temperatures.
The starter pulley is completely burst or cracked;
The spring has burst;
The starter cable is torn.
To fix each of these faults with your own hands, you will need certain tools. You must have a set of screwdrivers and a spare cable with you. It is necessary to remove and inspect the starter for the chainsaw in the following order:
To find the cause of the breakdown, the starter will need to be removed from the chainsaw. To do this, unscrew the screws with a screwdriver, with which the protective cover is held with the starter attached to it;
After removing the cover, you must carefully unscrew the screw by means of which the starter is attached to the protective cover;
Then you need to try to smoothly start the starter - for this, remove the spring and clamps from it;
Further, a coil with a cable is removed from the starter for inspection.
As a result of inspection, you can find a number of typical malfunctions. These include:
Various damage to the pulley in the form of ruptures or cracks, mainly in the rear of the part - they interfere with the normal operation of the entire starter;
Damage to the starter spring of the lightweight start - in such cases, not only the spring itself can be faulty, but also the place of its fixation - this is the most vulnerable part of the spring;
Damaged starter flywheel dog.
In any case, any defective part must be completely replaced with a new part.
Before installing the chainsaw starter spring, you will need to remove the mechanism clip - this should be done very carefully so as not to break the part;
Then you need to look inside the clip - in it you will see a spring wrapped around a C-shaped element. To pull out the spring, fix its upper part with your finger and pull the starter handle slightly to the side;
After removing the old spring, you need to wind up a new part. At the same time, try to avoid kinking and twisting of the new spring element;
To collect the chainsaw starter spring, you will need to act as carefully as possible, otherwise one wrong movement can lead to unwinding of the part;
After you have managed to fully insert the spring into the starter, you must carefully secure the clip.
Video (click to play).
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