Disassembly Of The Stihl 180 Chainsaw

Distribution chamber

In the distribution chamber, as in the fuel pump, there is also a membrane that opens and regulates the fuel supply by pressing a special rocker, while raising its needle valve.

Disassembly Of The Stihl 180 Chainsaw

The chamber cover is the compensator body, which is attached to the carburetor with four screws; a gasket is installed between the body and the cover, which increases the height of the chamber and is responsible for sealing.

Air damper

The carburetor choke is installed on the opposite side of the throttle and is responsible for starting a cold engine, it is controlled by the engine control lever. For a cold start, the air damper is completely closed, for normal operation, open.

Fuel pump

A fuel pump is installed directly in the carburetor body, which operates under the action of an air pulse from the crankcase of the chainsaw, transmitted through special channels. A diaphragm is installed in the pump, it is she who is responsible for pumping fuel under the action of an impulse. A gasket is installed between the diaphragm and the body, which is responsible for the tightness of the fuel pump.

When to adjust the Stihl 180 carburetor

To begin with, it is worth deciding why it may even be necessary to adjust and repair the stihl ms 180 carburetor. So, this must be done in the following cases:

  • If the chainsaw does not keep idling;
  • Repairs may be required if the saw does not start;
  • There is a loss of power;
  • Increased fuel consumption;
  • The chainsaw does not develop maximum speed.
  • Stalls when accelerating.

This list can be continued for a long time, but we have identified the main reasons. Before proceeding with the adjustment, you need to know what are the main parts of the carburetor on the Stihl 180 chainsaw, and who makes it.

Stihl 180 carburetor device

So, the stihl ms 180 carburetor is developed and manufactured by a subsidiary of Stihl called Zama. Original carburetors, on their body have a company logo that guarantees product quality.

Dismantling the carburetor Stihl 180

In order to purge, change the gaskets or the needle valve, the carburetor must be disassembled. To do this, unscrew 4 screws on the expansion joint cover and one on the fuel pump.

Having opened the case, you should be extremely careful, because if debris gets into the inside of the carburetor, it will make its work impossible. The thickness of the channels in it is comparable to the thickness of a thread or even a human hair.

For the repair of the Stihl 180 carburetor, can be seen below. In it, the wizard talks in detail about the problems and clearly demonstrates the entire repair process.

Fuel supply system repair

The characteristic signs indicating a breakdown of the supply system are that the fuel stops flowing into the cylinder. With such a problem, the first step is to check the hose and the condition of the membrane. 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, all the more 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 not enough, 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, you should also pay attention to the carburetor channels and the integrity of the membrane.

Types of breakdowns

Before starting work on finding the malfunction of the Stihl 180 chainsaw, it is necessary to prepare the tools and allow the engine to cool down, while 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.
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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 case of stretching, the chainsaw will work 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 a complete or partial disassembly of the saw.

Types of malfunctions and repair of the Stihl 180 chainsaw

A common type of chain saw is a chainsaw. Such a device is widely used in construction work, wood harvesting and other various operations with wood. But no matter how high-quality a device is, malfunctions may occur in its operation. It is more profitable to repair the Stihl 180 chainsaw yourself, as this will save not only money, but also help you understand its device.

Principle of operation

Before identifying a malfunction and repairing a Stihl 180 chainsaw, you should study the principle of its operation and what structural elements it consists of. As part of the chainsaw, its main element is a two-stroke engine. It is he who is responsible for the reliability and performance of the device. The engine participates in starting the chain drive and maintaining its movement under the action of a centrifugal clutch. In addition to the electric motor, the chainsaw includes:

  • Starter;
  • Flywheel, it is also a cooling unit;
  • Ignition block;
  • Clutch and brake mechanism;
  • Carburetor with STIHL compensator;
  • Air filter;
  • Fuel and oil tank;
  • Muffler;
  • Anti-vibration system.

Fuel from the tank enters the carburetor, where it is mixed with air coming from the cleaning unit. From the carburetor, the air / fuel mixture enters the engine. The saw carburetor has one miter screw that controls the idle speed. All device settings are made at the factory and ensure optimal flow of the fuel-air mixture.

The chainsaw uses a single-cylinder engine. A clutch is used as a protection mechanism, which makes it possible to transfer the electric motor to idle in the event of a chain jam. At the initial revolutions, special pads located in the radial direction are pressed by springs against the middle of the shaft, thereby preventing it from rotating. At high rpm, the centrifugal force increases, which causes the springs to compress. The pads are squeezed out from the center of the shaft, the sprocket rotates and the chain starts.

The electrical circuit of the device is involved in the ignition system. Due to the use of a flywheel with magnets, an electromotive force (EMF) arises during rotation, which leads to the appearance of current in the electronics unit. The block sends a signal to the candle, provoking the appearance of a spark at its terminals. This spark ignites the carburetor mixture. After a successful start has occurred, the chainsaw begins to repeat all work processes in a cycle.

The chain of the device is assembled from teeth and connecting elements. To protect the user from kickback, the device is equipped with a brake system. Oil is supplied in automatic mode under the action of a pump.

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 units with your own hands.

Dismantling a chainsaw

Before proceeding directly to disassembling the saw, you first need to clean it. All operations must be performed carefully and slowly. So that fasteners and small parts are not lost, you can use containers in which structural elements are folded during disassembly.

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Disassembly begins with loosening the screws holding the clutch cover, after which the chain tension is released. Only after that the bolts are completely unscrewed. Then the clutch pad, tire and the chain itself are removed. The next step is to remove the top case cover. Using a brush and compressed air, the pinion drive unit is cleaned, usually this is the most dirty area. It is most convenient to wash places in oil leaks with gasoline.

The stages of disassembly of the device occur in the following order:

  1. Removable vibration handle. It is fixed to the saw body on three shock absorbers. To remove it, you need to remove the plugs, then, using a screwdriver, squeeze out the shock absorbers, starting from the one located farthest in relation to the handle. Then remove the two screws and disassemble the handle. The throttle trigger can now be removed by disconnecting the wire rod.
  2. The starter is removed. Removing the top cover will allow access to the oil and fuel tank plugs. After removing the plugs, the starter is removed. The place where the starter is installed is thoroughly cleaned of sawdust.
  3. The flywheel is released. In order to remove it from its seat, you will need to use a union head with size 13. Initially, the candle is unscrewed, the piston is blocked through the hole formed. Having loosened the nut, a punch is installed on it, on which a sharp blow is made. From this action, the flywheel jumps off the shaft, after which it can be easily removed by hand.
  4. The clutch and the oil pump drive are dismantled. Drive sprocket and needle bearing are removed first. For this, the lock washer is removed. Using a size 19 head, unscrew the bolts holding the clutch. It should be noted that the thread on it is left-hand. Having dismantled the clutch, the reflective plate and the oil supply drive are removed.
  5. At the penultimate stage, the carburetor with a silencer and the ignition coil are removed. In order to remove the carburetor, you will need a head 8 and an extension. Before removing the air filter and carburetor, you will need to disconnect the ignition wire and disconnect the choke. The muffler is held by two nuts that can be easily unscrewed.
  6. The engine is removed. Turning the saw body over, unscrew the four screws holding the motor. Then, with a gentle movement, it is removed from the installation site.

Country affairs. STIHL MS 180 oil supply repair

The owners of this model of the tool should be prepared for the fact that they may face such an unpleasant moment as a leak of oil for lubricating the chain. Oil can leak out while working with the tool and even when just lying down without action.

What is the reason for this phenomenon? The fact is that oil leaks due to leakage in the area where the hose from the oil tank and pump is connected.

In order to solve the STIHL MS 180 oil supply problem, it is advisable to disassemble the device.

Solution to the problem:

  1. Check the hose, if it is damaged, then replace it with another one. Or try to degrease the hose and rinse, and put on a sealant, everything should work.
  2. Check the filter oil for breakage, clean it (if you filled in the waste)
  3. There may also be a clogged zapune, this creates a vacuum in the fuel tank and affects the fuel supply. The problem may be in the adjustment of the carburetor and the channels may be clogged, well, or the air filter, you need to thoroughly clean the filter and carburetor channels.

In general, the main problem is due to poor oil.

It is not recommended to pour oil into a chainsaw that is not intended!

Oil supply repair. What to fill in oil for chainsaw Stihl 180 (stihl 180)

  1. Spend some money on original oil Stihl HP 2-stroke oil costs a little more, but cleaning is even more expensive.
  2. High-quality fuel can also be poured into Mobile 1, and a three-phase one is suitable for lubrication, in no case fill in the workings.
  3. From inexpensive options, mineral oil 15-40, in winter 10-30. You can M8, for example, or M10.

Remember personal safety when working with a chainsaw.

Remember that the quality of the oil being poured affects the operation of the chainsaw. Poor quality oil can cause ineffective tool performance and adversely affect tool parts.

To ensure that the STIHL MS 180 oil pump delivers oil without difficulty, periodically check and clean the pump. So the oil supply process will be normal.

Chainsaw Stihl 180 oil supply repair

Chainsaw STIHL MS 180 an indispensable tool for logging and other wood construction work. It is one of the most acclaimed gardening devices that comes with multifunctional features.

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The tool weighs about 4 kg. The power reaches 1.5 kW and the busbar length is 35 cm.

Note that from a semi-professional device for this model of the saw got electronic ignition and a fairly fast chain tension. In addition, the STIHL MS 180 saw has 2 tanks for gasoline and an oil mixture.

Reduced vibration is one of the main features.

This result is achieved thanks to 4 shock absorbers. It’s no secret that high depreciation has a detrimental effect on human health and in Europe they have been struggling with it for a long time.

It should be noted that it is not advisable to disassemble this saw on your own without special instructions, in this case it is better to entrust the device to the masters.

Construction and Dacha in plain language

Dismantling the clutch and oil pump drive

Remove the drive sprocket before disassembling the clutch. 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, it is necessary to unscrew the clutch. The thread on it is left-handed, so it unscrews towards the tire, and not the back of the Stihl 180 saw.

Having untwisted 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.

Dismantling the Stihl 180 chainsaw with your own hands

Stihl MS 180 is a reliable and unpretentious tool, but sometimes it requires repair, like any other technique. In this article, we will consider how the Stihl MS 180 chainsaw is disassembled, which is necessary in the event of an engine overhaul.

Dismantling the chainsaw quiet 180 part 1

In this We will show you how to replace the piston group with chainsaw Stihl MS180, crankshaft oil seals.

Saw varieties and specifications

The demand for Stihl mc 180 chainsaws among amateurs is justified by the convenience of work and reliability. The basic model weighs only 3.9 kg. A saber, the length of the web is 35 cm, it allows you to saw logs, as it is also called, to drop trees with a cross section of up to 30 cm. The power of a two-stroke engine is 5 liters. With., which allows us to do what remains for our client to do household work related to cross-sawing boards and, in addition, firewood of any tree species. The capacity of the fuel tank is only 0.25 liters, alas, this allows you to work without stopping for a period of 45-55 minutes.

A mixture should be used for refueling, consisting of a gear oil recommended for another with unleaded AI-92 and AI-95 gasoline. Ratio of 25 ml of additive per liter of gasoline.

Chainsaw chain Stihl 180 represents an endless endless loop of 50 links. Other characteristics:

Stihl 180 saw assembly and disassembly.

  • Chain pitch 3/8 inch;
  • Groove width. 1.3 cm;
  • Production material high-carbon steel, shiny steel, victorious brazing.

Working mechanism, saw headset, includes bar, sprocket and automatic lubrication system.

The chain tensioning system is located on the side, which is comfortable. Chain brake foreseen.

Based on the length of the tire and the modernization of the chainsaw Stihl MC 180 has a number of modifications. Saws with a saber length of 35 cm refer to models in the marking of which there are 14, their length is 14 inches. The same equipment in terms of the engine and its characteristics, but with a tire length of 40 cm, is called MC 180 16. Chainsaw Stihl mc 180 С-BE tool above class. There is a 40 cm long tire bed, an easy starting system, and a quick chain tensioning system. Easier access to the air intake filter, a condition where tool life is extended.

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, 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 assembly 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 locking 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.