How to disassemble a STIHL 180 chainsaw
Repair tools STIHL 180
To carry out a relatively high-quality repair of the STIHL chainsaw ms 180 yourself, you will need to have:
- 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;
- piston stopper to limit the crankshaft travel;
- an electronic tachometer in order to properly adjust the chainsaw carburetor;
- T-key STIHL Torx 27 or equivalent;
- crankshaft bearing puller.
Only if you have these tools, do-it-yourself repairs to the STIHL 180 chainsaw can be performed with sufficient quality.
How to replace the starter cord
Quite often, the starter cord needs to be replaced due to a break. Let’s figure out how it can be replaced without contacting a service center.
Как разобрать бензопилу STIHL MS 180 (Штиль мс 180). How to disassemble a stihl chainsaw ms 180
Removing the starter from the STIHL 180 chainsaw is quite simple, without even removing the handle block; this will require unscrewing the fastening screws and removing the oil and fuel tank caps. After that, slightly lifting and expanding the starter, remove it from the seat.
The starter cord is wound on a special drum, which is installed in the body of the part. To replace the cord, there is no need to remove the drum, just remove the torn cord and wind a new one.
Replace with an original STIHL cord with a suitable cross-section. Thicker lanyard will reduce the number of times the cord is wrapped around the drum, resulting in reduced starter stroke.
After the cord is wound on the drum, it is necessary to pass it through the starter housing and, having installed the handle, fix it with the help of several knots made one after another. Next, the working stroke of the starter is checked, and if everything is in order, the part is installed in place.
Carburetor repair and adjustment
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.
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. On the STIHL saw, the carburetor has 1 idle adjustment screw. If the idle speed is violated, then the carburetor needs to be repaired. This is a complex process and difficult to do on your own. Contact a repair shop.
Repair and replacement of the oil pump
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.
How to remove the clutch
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.
How to repair a STIHL 180 chainsaw
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 your STIHL chainsaw.
How to set the ignition
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.
Chainsaw engine runs intermittently
The reason for such a malfunction may be a breakdown of the cylinder-piston group, which is quite simple to repair with your own hands.
To remove the cylinder from the tank, four bolts must be unscrewed on its head. Then carefully check the piston, on which there should be no scoring, scratches, chips. If present, the piston will need to be replaced.
The optimal pressure in the combustion chamber is ensured by the piston and piston rings, which must sit tightly enough on the piston body. If the piston inserted into the cylinder during rocking has a free stroke, then this indicates its wear.
This defect can be eliminated by boring the cylinder and installing repair parts. However, the easiest way is to simply replace the entire CPG set.
Fuel supply system repair
The characteristic signs indicating a breakdown of the supply system are that the fuel ceases to flow into the cylinder. With such a problem, the first step is to check the hose and the condition of the diaphragm. If everything is in order with these nodes, then the reasons are a clogged filter or breather.
If there is a suspicion of a clogged filter, the hose is pulled out and the stream of escaping fuel is visually inspected. If the jet is continuous and under pressure, then everything points to a filter malfunction. You can try to clean it, but it is more expedient to replace it. especially the manufacturer, with an average load on the device, recommends replacing it every four months. It is the poor jet of fuel that indicates a clogged breather. The breather is cleaned with a sharp needle.
In addition, a clogged air filter is also the culprit. The amount of air that mixes with the fuel is often insufficient, so the fuel mixture becomes too rich and the engine malfunctions. Elimination of the malfunction occurs by removing the filter and rinsing it in water.
In case of failures in the fuel supply, it is also worth paying attention to the carburetor channels and the integrity of the membrane.
Malfunctions and their elimination
Breakdowns caused by the operation of the device occur for two reasons: violations of operating conditions and limited service life of the chainsaw elements. As a rule, all repair operations are associated with blockages of certain units. The most time consuming process is the restoration of the engine. It will be problematic to repair it yourself without tools and knowledge, but it should not be difficult to repair the rest of the nodes with your own hands.
Types of breakdowns
Before starting work on finding a malfunction of the STIHL 180 chainsaw, it is necessary to prepare the tools and allow the engine to cool down, thus excluding unintentional start.
For a qualitative elimination of a breakdown, it is necessary to analyze what actions preceded its appearance. If we proceed from the fact that the chainsaw is equipped with an electric motor, the main breakdowns are primarily associated with it. The most common malfunctions include:
- inability to start the engine;
- self-shutdown of the device during operation;
- the electric motor does not pick up the required speed during operation;
- the appearance of extraneous noise and a burning smell;
- oil leak.
Common breakdowns of chainsaw consumables include chain breakage, which always occurs between its links. When connecting the links to the rivet, you will need to firmly press their side parts and flare them. If the protrusions are worn off, then it will not work to rivet them, therefore contact welding will be needed.
In addition to breaking the chain, it can also stretch. This happens when using a low-quality chain or in case of its frequent overheating, as well as wear of the driven sprocket. Overheating is associated with a disruption in the oil supply caused by blockage of the injection. To eliminate the malfunction, you will need to purge the oil supply system. In the event of stretching, the chainsaw works in jerks. To restore normal operation, you can try to remove one link, while it should be borne in mind that it is not so easy to rivet the links.
When searching for breakdowns in the device, it is recommended to follow the following sequence of actions:
- examine the general condition of the device;
- check the mixture level in the fuel tank;
- inspect the unit responsible for starting the saw;
- diagnose the performance of the spark plug and the condition of the sealing ring;
- evaluate carburetor.
Some types of malfunctions can be eliminated by simple actions such as cleaning the components. But malfunctions associated with the carburetor or ignition system require complete or partial disassembly of the saw.
Removing and disassembling the engine
The engine is held in place by 4 screws installed on the bottom of the STIHL 180 chainsaw. To remove them, unscrew them, then carefully remove the engine from the seat and the rubber pipe of the carburetor.
To disassemble the engine, 4 crankcase screws are unscrewed, and it is removed, then you can remove the crankshaft complete with oil seals, bearings and piston rings.
Removing bearings and seals usually does not require additional tools, but if the bearings were pressed onto the shaft with force, then a special puller will be needed for dismantling.
To remove the piston from the connecting rod, you will need to remove the retaining ring from the seat using a thin screwdriver, then the piston pin is squeezed out from the opposite side, after which the piston is retracted to the side.
STIHL 170/180 HANDLE REPLACEMENT
Removing the starter
At the next stage, the upper case cover is removed and the 4 starter mounting screws are loosened, after which it is necessary to remove the oil tank and fuel barrel covers. The starter is removed quite simply and there should be no problems.
After removing the starter, the opened inner cavity of the chainsaw must be cleaned, since usually there is a large amount of compressed small sawdust on the body under the starter.
Removing the handle
Direct disassembly of the STIHL 180 begins with the removal of the handle, which is attached to the body of the chainsaw using three rubber shock absorbers. To remove, it is necessary to remove the plastic plugs from the inner cavity of the shock absorbers, then, using a powerful screwdriver, first squeeze out the upper shock absorber, then the one closer to the rear handle.
At the back of the handle there is a gas trigger, which is connected to the carburetor through a wire rod, in order to disconnect the rod from the gas trigger, it is necessary to unscrew two screws and disassemble the handle.
When the handle remains on one shock absorber, it is necessary to unscrew the body of the chainsaw from the inside of the handle and bend it to the side, remove the body from the last rubber band.
Preparatory stage
Repair of any equipment should begin with the preparatory work, and the STIHL 180 saw is no exception. At the preparatory stage, before the STIHL 180 chainsaw is disassembled, it is necessary to remove the side cover, chain and tire from the chainsaw. Further, using a compressor and a brush, you need to clean the chainsaw from dirt, sawdust, oil drips and other things.
When cleaning the saw, pay special attention to the place where the chain saw drive sprocket is located, since this is the most polluted area.
In places with a large accumulation of oil, can be washed with clean gasoline.
How to Dismantle a STIHL 180 Chainsaw
STIHL MS 180 is a reliable and unpretentious tool, but sometimes it requires repair, like any other equipment. In this article, we will consider how the STIHL chainsaw is disassembled ms 180, which is necessary in the event of an engine overhaul.
Dismantling the clutch and oil pump drive
Before disassembling the clutch, the drive sprocket must be removed. To do this, carefully remove the lock washer from the grooves on the shaft and remove the sprocket and needle bearing.
With a high head 19, you need to unscrew the clutch. The thread on it is left-handed, so it unscrews towards the bar, and not the back of the STIHL 180 saw.
Having unscrewed and removed the clutch, you need to immediately remove the reflective plate and the oil pump drive, this is easy to do, because they are put on the shaft without any fastening.
Removing the handle
Direct disassembly of the STIHL 180 begins with the removal of the handle, which is attached to the body of the chainsaw using three rubber shock absorbers. To remove, it is necessary to remove the plastic plugs from the inner cavity of the shock absorbers, then, using a powerful screwdriver, first squeeze out the upper shock absorber, then the one closer to the rear handle.
At the back of the handle there is a gas trigger, which is connected to the carburetor through a wire rod, in order to disconnect the rod from the gas trigger, it is necessary to unscrew two screws and disassemble the handle.
When the handle remains on one shock absorber, it is necessary to unscrew the body of the chainsaw from the inside of the handle and bend it to the side, remove the body from the last rubber band.
Preparatory stage
Repair of any equipment should begin with the preparatory work, and the STIHL 180 saw is no exception. At the preparatory stage, before the STIHL 180 chainsaw is disassembled, it is necessary to remove the side cover, chain and tire from the chainsaw. Further, using a compressor and a brush, you need to clean the chainsaw from dirt, sawdust, oil drips and other things.
When cleaning the saw, pay special attention to the place where the chain saw drive sprocket is located, since this is the most polluted area.
In places with a large accumulation of oil, can be washed with clean gasoline.
Removing the flywheel
The flywheel of the STIHL 180 chainsaw is tightened with great effort, so you need a head with a metal knob to remove it. The nut holding the flywheel is unscrewed by the head by 13.
To block the crankshaft from turning, you need to unscrew the spark plug and install the piston stopper through the spark plug hole, if it is not there, you can use the old cord from the starter, with knots tied to it and immersed in the cylinder through the spark plug hole.
It is strictly forbidden to keep the flywheel from turning by installing a power screwdriver and other tools between its ribs and the body, with this method of blocking from turning, the flywheel blades are not able to withstand the load and break off.
After the piston is locked in the cylinder, you can unscrew the flywheel nut. The thread in the nut is ordinary, so you need to turn it to the left. Having loosened the nut, it is not necessary to remove it to the end, it is enough to unscrew it until its upper edge is equal to the tip of the shaft, after which a soft metal drift is installed on the nut and a sharp blow is made on it. Thus, the flywheel jumps off the shaft from a sharp impact and can be easily removed without the help of additional tools.
Carburetor, muffler and ignition coil
To remove the carburetor, it is necessary to have a head of 8 and an extension, with which it is convenient to unscrew the nuts securing the carburetor and air filter. Before dismantling the carburetor, it is necessary to disconnect the ignition wire and the choke rod from the engine control lever and remove the lever, only after that the air filter and carburetor are removed.
The STIHL 180 muffler is attached with two nuts, which you need to unscrew, pull it towards you, it can be easily removed.
The coil is mounted on two screws, to remove you just need to unscrew them.
Disassembly and assembly STIHL MC 180
STIHL MS 180 is a reliable and unpretentious tool, but sometimes it requires repair, like any other equipment. In this article, we will consider how the STIHL chainsaw is disassembled ms 180, which is necessary in the event of an engine overhaul.
Removing and disassembling the engine
The engine is held in place by 4 screws installed on the bottom of the STIHL 180 chainsaw. To remove them, unscrew them, then carefully remove the engine from the seat and the rubber pipe of the carburetor.
To disassemble the engine, 4 crankcase screws are unscrewed, and it is removed, then you can remove the crankshaft complete with oil seals, bearings and piston rings.
Removing bearings and seals usually does not require additional tools, but if the bearings were pressed onto the shaft with force, then a special puller will be needed for dismantling.
To remove the piston from the connecting rod, you will need to remove the retaining ring from the seat using a thin screwdriver, then the piston pin is squeezed out from the opposite side, after which the piston is retracted to the side.
Removing the starter
At the next stage, the upper case cover is removed and the 4 starter mounting screws are loosened, after which it is necessary to remove the oil tank and fuel barrel covers. The starter is removed quite simply and there should be no problems.
After removing the starter, the opened inner cavity of the chainsaw must be cleaned, since usually there is a large amount of compressed small sawdust on the body under the starter.