How to tension the spring on a chainsaw
Typical breakdowns and repairs of the chainsaw starter
Before carrying out repairs, it is necessary to find out the reasons for the breakdown. Since the product is constantly subjected to dynamic and other types of loads, its failure is not excluded. Frequent causes of starter breakdowns are: cable breakage, abrasion or chipping of several splines of the ratchet drum, damage to the spring, cracked pulley and others. To determine why the saw will not start, you will need to conduct an appropriate revision of the starter mechanism. Consider the main types of malfunctions, as well as find out how to properly repair the product.
Replacing the cord
The starter cord is a strong rope that is strong enough to wear out, but even its technical properties do not save it from damage. The rope rubs against the body of the starter cover every time the tool is started, which leads to its gradual chafing and wear.
If the cord is frayed, then to replace it, you will need to disassemble the body of this unit. After removing the cover, it is necessary to lift the drum, but only in such a way that it does not jump out of its seats. It is recommended to carry out this work together with a partner who will fix the spring, and you will take over the replacement of the cable. The remnants of the old cable should be removed, and then fasten the new product in the handle and in the groove of the drum. After that, the cable should be wound around the roller, and finally assemble the body.
It is important to know! Before fixing the cable in the handle, you should pass it through the corresponding hole in the starter cover.
Chainsaw starter. Learning to self-repair
Any chainsaw requires a starter to quickly start. With accelerated scrolling of the crankshaft of the tool, the fuel-air mixture supplied to the engine is compressed and subsequently ignited. Therefore, the normal operation of the starter for the chainsaw determines the performance of the entire mechanism.
How to assemble a starter on a chainsaw?
After replacing the faulty elements of the starter, it is the turn of its reassembly. In this case, maximum accuracy must be observed, since the slightest discrepancy can lead to damage to the trigger. The assembly of the assembly should be performed in the following sequence:
- The standard cable will need to be tucked into the factory hole of the reel. At the same time, the cord does not need to be wound;
- Next, you will need to insert the coil into its base place. At this stage, many beginners make a common mistake. There are 2 slots on the surface of the coil. One of them should get the regular hook of the coil spring. To do this, the coil will need to be installed in such a way that it fits snugly into its original place, and the existing hook fits exactly into the slot. The correctness of installation must be checked by turning the coil in the direction of the clock hand until resistance appears;
- Then you need to install a device for easy starting of the chainsaw. In this case, the protrusion of the latter should be located in the recess of the installed coil;
- After that, you will need a screw and washer to fix the device;
- Next, the other end of the cord must be tucked into a special outlet;
- In the next step, you will need to thread the cable into the starting handle. To this end, you will need to tie a medium-sized knot at the end of the cord. If it is too small, then the cable will slip, which is why it will quickly wind up on the trigger drum;
- Then you need to release the loop inside the starter. Immediately after this, you should start rotating the trigger in the direction of the clock hand. In this case, the cord does not need to be wound. Next, you need to fix the coil with your hand, and pull the loop out by the handle;
- After that, you need to check the operation of the trigger;
- If the unit is working properly, it remains to install it on the tool, and fasten with three screws.
Starter repair is not a complicated procedure if you follow the correct procedure. As a rule, replacing the starter cord will take no more than 20 minutes. The main thing is to correctly position the pulley and drum in relation to each other. Otherwise, the trigger will not work.
Diagnostics
Diagnostics of the tool triggering system is carried out as follows:
- Unscrew the fastening screws and remove the cover.
- Remove the screw that attaches the mechanism to the protective cover.
- Smoothly start the starter by removing the spring and clamps from it.
- For inspection for wear and defects, dismantle the cable reel.
- Check the fuel system for water. If there is water inside the system, then the fuel fluid must be replaced.
- The power unit is inspected for overflowing with fuel fluid. In this case, you need to unscrew and dry the spark plug, pull the starter, dismantling the air damper.
- Check the spark plug for a spark.
How to replace a chainsaw starter spring
If there is damage to the spring, which is often the case on Chinese instruments, then the mechanism can only be repaired by replacing it. But if its damage occurred at the point of attachment, that is, the ear burst, then it can be repaired.
The repair of the spring is heating the place of destruction to 600 degrees, after which it slowly cools down to 100 degrees, at which the end is wrapped in the shape of a fragment. Thus, it will be possible to avoid the loss of elasticity of the product, which will extend its service life. Although most specialists simply replace the product with a new one.
The spring replacement process is carried out in the following sequence:
- Initially, the clip or drum of the mechanism is removed.
- There is a spring inside the drum. To dismantle it, you will need to fix its upper part, then pull the starter handle aside.
- When the old spring is removed, you will need to install a new one. In this case, it is imperative to clean the case.
- When installing a new spring, insert it into the starter, then hit the groove with a tendril.
- At the end of the work, you can put on the drum and replace the starter cover.
How to tension the chainsaw starter spring
Chainsaw starter repair
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.
The device and principle of operation of the chainsaw starter
Most well-known chainsaw manufacturers equip their products with starters that work on almost the same principle. Its essence is as follows: in the groove of the saw body there is a handle through which the cord is passed. When the handle is suddenly lifted, the cord is pulled out, which engages the drum, which is in the ratchet mechanism. This drives the spitz drum, which is located on the shaft. During this, the crankshaft makes a couple of revolutions, which leads to compression of the fuel mixture, which at this moment is located between the cylinder head and the piston. When the handle is lowered, on the contrary, the ratchet and the spitz loses their contact, which leads to a stop of the shaft.
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 significantly facilitates starting and extends the life of the starter, which is especially noticeable at low temperatures.
How to assemble a starter on a chainsaw?
After replacing the faulty elements of the starter, it is the turn of its reassembly. In this case, maximum accuracy must be observed, since the slightest discrepancy can lead to damage to the trigger. The assembly of the assembly should be performed in the following sequence:
- The standard cable will need to be tucked into the factory hole of the reel. At the same time, the cord does not need to be wound;
- Next, you will need to insert the coil into its base place. At this stage, many beginners make a common mistake. There are 2 slots on the surface of the coil. One of them should get the regular hook of the coil spring. To do this, the coil will need to be installed in such a way that it fits snugly into its original place, and the existing hook fits exactly into the slot. The correctness of installation must be checked by turning the coil in the direction of the clock hand until resistance appears;
- Then you need to install a device for easy starting of the chainsaw. In this case, the protrusion of the latter should be located in the recess of the installed coil;
- After that, you will need a screw and washer to fix the device;
- Next, the other end of the cord must be tucked into a special outlet;
- In the next step, you will need to thread the cable into the starter handle. To this end, you will need to tie a medium-sized knot at the end of the cord. If it is too small, then the cable will slip, because of which it will quickly wind up on the drum of the trigger;
- Then you need to release the loop inside the starter. Immediately after this, you should start rotating the trigger in the direction of the clock hand. In this case, the cord does not need to be wound. Next, you need to fix the coil with your hand, and pull the loop out by the handle;
- After that, you need to check the operation of the trigger;
- If the unit is working properly, it remains to install it on the tool, and fasten with three screws.
Starter repair is not a complicated procedure if you follow the correct procedure. As a rule, replacing the starter cord will take no more than 20 minutes. The main thing is to correctly position the pulley and drum in relation to each other. Otherwise, the trigger will not work.
Spring repair
Procedure for repairing the starting system spring:
- Remove the starter from the tool body.
- Remove the protective cover.
- Wind the cord from the end of the pulley to avoid twisting the mechanism.
- Pass the other end of the cord through the hole in the protective cover.
- Pull the cord 17-20 cm to check the rotation of the spring mechanism pulley.
- Check the operation of the spring after pulling out and releasing the mechanism.
- Unscrew the pulley circle from the side of the generator by removing the 3 mounting bolts.
- Dismantle the pulley and cord.
- Check the condition of the parts for wear and damage or breakage. If the spring break is small, then the defect can be eliminated by welding.
Chainsaw starter repair
In the course of frequent use, some components of the chainsaw may be subject to constant dynamic influences, which, for example, may break the cable at the most inopportune moment, the shaft will begin to turn at a much lower speed, or the ratchet teeth will crumble. Given this, the repair and revision of the chainsaw starter can be operations carried out even more than once during one working season.!
Replacing the starter
Procedure for replacing the chainsaw starter:
- Remove the assembly from the tool body.
- Unscrew the fastening bolts and remove the side cover.
- Unscrew the fastening screw with which the starter is attached.
- Remove the clamp and spring mechanism of the starting system.
- Dismantle the pulley with a cord.
- Replace all worn and damaged parts.
- Wrap the pulley.
- Install a new starter.
- Reinstall the pulley with cord, clamp and spring.
- Screw on the side cover and install the assembly on the chainsaw body.
Before installing a new starter, it is recommended to inspect it for defects, check the build quality and the presence of a guide sleeve.
How to repair a chainsaw starter with your own hands
If difficulties arise during starting the tool, power is lost or there are malfunctions in the fuel supply system, then it is necessary to repair the chainsaw starter with your own hands or return the tool to service.
Device
The chainsaw starter device includes the following elements:
- ignition system screw;
- return spring;
- coil of the starting system;
- deflector;
- cap;
- magneto;
- drum;
- spark plug;
- the electronic unit;
- wiring;
- power button;
- handle and cable.
The main parameters of the chainsaw start system:
- power. from 2000 to 2500 W;
- the maximum number of revolutions per minute. 3000;
- weight. 0.5 kg.
After pressing the power button, the flywheel begins to rotate along with the magnet that is on it.
An electromotive force appears in the system. The resulting current is converted by an electronic unit into electrical signals, which are transmitted to the driving elements. A spark is formed, which provokes the ignition of the fuel-air mixture.
How to install a chainsaw starter spring
How to put the spring
In order to install a new spring, you must perform the following steps:
- Carefully remove the mechanism clip.
- Inspect the inside of the cage, in which the spring mechanism is located near the C-shaped element.
- Lock and tighten the top of the spring with your finger and pull the starter handle to the side.
- Remove the worn mechanism and wind up a new spring. Bends and twists of the element should be avoided.
- Assemble a new spring mechanism. It is recommended to do this slowly so that the mechanism does not unwind.
- Fill the spring and insert it into the starter mechanism.
- Secure the clip carefully.
How to assemble a starter on a chainsaw?
After replacing the faulty elements of the starter, it is the turn of its reassembly. In this case, maximum accuracy must be observed, since the slightest discrepancy can lead to damage to the trigger. The assembly of the assembly should be performed in the following sequence:
- The standard cable will need to be tucked into the factory hole of the reel. At the same time, the cord does not need to be wound;
- Next, you will need to insert the coil into its base place. At this stage, many beginners make a common mistake. There are 2 slots on the surface of the coil. One of them should get the regular hook of the coil spring. To do this, the coil will need to be installed in such a way that it fits snugly into its original place, and the existing hook fits exactly into the slot. The correctness of installation must be checked by turning the coil in the direction of the clock hand until resistance appears;
- Then you need to install a device for easy starting of the chainsaw. In this case, the protrusion of the latter should be located in the recess of the installed coil;
- After that, you will need a screw and washer to fix the device;
- Next, the other end of the cord must be tucked into a special outlet;
- In the next step, you will need to thread the cable into the starting handle. To this end, you will need to tie a medium-sized knot at the end of the cord. If it is too small, then the cable will slip, which is why it will quickly wind up on the trigger drum;
- Then you need to release the loop inside the starter. Immediately after this, you should start rotating the trigger in the direction of the clock hand. In this case, the cord does not need to be wound. Next, you need to fix the coil with your hand, and pull the loop out by the handle;
- After that, you need to check the operation of the trigger;
- If the unit is working properly, it remains to install it on the tool, and fasten with three screws.
Starter repair is not a complicated procedure if you follow the correct procedure. As a rule, replacing the starter cord will take no more than 20 minutes. The main thing is to correctly position the pulley and drum in relation to each other. Otherwise, the trigger will not work.
The device and principle of operation of the chainsaw starter
Most well-known chainsaw manufacturers equip their products with starters that work on almost the same principle. Its essence is as follows: in the groove of the saw body there is a handle through which the cord is passed. When the handle is suddenly lifted, the cord is pulled out, which engages the drum, which is in the ratchet mechanism. This drives the spitz drum, which is located on the shaft. During this, the crankshaft makes a couple of revolutions, which leads to compression of the fuel mixture, which at this moment is located between the cylinder head and the piston. When the handle is lowered, on the contrary, the ratchet and the spitz loses their contact, which leads to a stop of the shaft.
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 significantly facilitates starting and extends the life of the starter, which is especially noticeable at low temperatures.
Chainsaw starter device
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, the contact between the ratchet and the splines is lost, and the shaft stops.
Chainsaw Repair. Replacing the Chain Brake (Echo Part # P021017220)
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 cylinder of the chainsaw.
- 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.
How to put a spring on a chainsaw starter?
Fitting the spring into the correct groove is a tricky task. First of all, the part will need to be twisted, returning it to its previous dimensions. After that, it must be inserted into the cavity of the standard drum hub. To fill the spring in the chainsaw starter, you need to proceed in this order:
- The outer end of the spring used must be fixed in a special stop lug. In this case, the second end with a screwdriver will need to be installed opposite the standard hole inside the lock;
- Next, the loop located at the inner end of the standard spring should be aligned with the hole. It is better to use a screwdriver for this. When the ends are aligned, the disc will need to be lowered;
- After mounting the disc, you need to check that the dog of the factory ratchet mechanism of the chainsaw is in its original place. Then you can assemble the ratchet in reverse order.
To wind the spring on the chainsaw starter, you need to take into account all the holes and notches available. After installation, you will need to tighten the spring. As soon as the slack is eliminated, the spring will remain to be wound a few turns. this is necessary to maintain the required tension of the installed part.
How to repair a chainsaw starter with your own hands
If difficulties arise during starting the tool, power has disappeared or there are malfunctions in the fuel supply system, then it is necessary to repair the chainsaw starter with your own hands or return the tool to service.