How to install a STIHL 180 oil pump

All about the STIHL 180 oil pump

The STIHL MC 180 chainsaw uses a mechanical oil pump as an oil supply mechanism for chain lubrication. Remarkably, the STIHL 180 oil pump is completely made of metal parts and is practical and highly reliable. Let’s take a closer look at how the oil supply system of the STIHL 180 chainsaw is organized.

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Malfunctions of the pump and the system as a whole

As you know, there is nothing eternal in this world and over time everything has to be repaired. So the oil system STIHL ms 180 is no exception, and has its own specific malfunctions. Let’s consider them in more detail.

Signs of a malfunctioning lubrication system are as follows:

MS250 oil pump removal and install

  • the chainsaw chain is completely dry and does not shine;
  • oil does not leave the oil tank;
  • the chain stretches quickly and this happens all the time;
  • the saw bar is pulled to the side during sawing;
  • the tire heats up and in the area of ​​the leading sprocket, paint melting is observed.

All these signs directly or indirectly indicate problems in the chainsaw chain lubrication system.

The first thing to do after you suspect that chain oil is not being supplied is to check the supply. This can be done in two ways. The first is described in detail in the instructions for the tool and consists in the fact that you need to start the chainsaw, add gas as much as possible and direct it towards any obstacle.

With a working lubrication system, oil will fly off the tip of the tire and a strip of oily drops will appear on the surface towards which the tire is directed. If there are any irregularities in the system, the surface will remain clean.

The second way is to remove the tire from the chainsaw and start it. With an increase in the engine speed, at the place where the tire shank is installed, oil will flow from the oil channel, if this does not happen, it is necessary to look for the cause of the malfunction.

Diagnostics

Diagnostics should begin with an inspection and check of the oil receiver (filter) of the STIHL 180 saw. As a rule, if the filter is heavily soiled, the oil supply may stop.

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In order to save money, you can try to clean a clogged filter by rinsing it thoroughly in gasoline.

Next, you need to remove the sprocket drum, and check the condition of the drive gear. The thread on it should be clearly defined, not licked and not have any other defects, also with the gear removed, it is necessary to check the wire lever. It must squeeze the gear tightly and not turn, otherwise, the gear is in place and does not transmit force to the pump, as a result of which the oil supply stops.

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If all of the above methods to detect and eliminate malfunctions have not yielded results, extreme measures must be taken, i.e. dismantle the pump.

Pump design, lubrication systems and principle of operation

The oil pump drive consists of two parts, it is a plastic worm gear and a wire lever that transfers the force from the drum sprocket to the worm gear.

One of the main malfunctions of the saw oil system is a defective thread on the plastic gear of the oil drive, therefore, whenever possible, it is necessary to control its wear and the quality of the thread.

The lever is rigidly attached to the gear and they are supplied as one piece. The tip of the wire arm has a characteristic curvature that is designed for better grip on the drive sprocket drum. The drum has a special slot for installing the drive.

Oil Pump Replacement On A Stihl MS250/MS230 Chainsaw

The STIHL 180 oil pump is completely made of metal and has a non-collapsible design. The pump housing has an oil inlet and a groove-channel through which oil from the oil line enters the pump directly. The mechanism is installed in the body of the STIHL 180 chainsaw.

At the moment of increasing engine speed, the sprocket drum begins to rotate the worm gear by the wire lever, and it, in turn, causes the oil pump plunger to rotate, as a result of which the oil begins to pump through the oil channels to the chainsaw tire.

In the operation of the system, the oil line of the chainsaw is also directly involved, at the end of which there is an oil receiver. The oil receiver is additionally a filter. On the second side of the oil hose, a rubber expansion is made, with the help of which the hose is installed in the body of the STIHL 180 chainsaw immediately behind the oil pump.

The reason for the appearance of oil leaks on the bottom of the chainsaw

The STIHL 180 chainsaw has a characteristic malfunction, which consists in insufficient sealing of the place where the oil hose is installed in the chainsaw body and the appearance of a leak in this place. To eliminate it, just remove the handle of the STIHL MS 180 saw, disconnect the hose itself, rinse and degrease the seat in the body and the hose end, then apply sealant and reinstall the hose. Such a simple operation will reliably eliminate the malfunction and the oil will stop leaking.

How to remove the pump

The oil pump is installed on the right side of the bottom of the housing, in the same place the oil line from the chainsaw tank is connected to it. To remove the pump, you will first need to free the saw from the handle, for this the rear handle of the unit is unscrewed and the throttle control rod is disconnected. At the next stage, you need to remove the plugs of the shock absorbers of the handle and, using a powerful slotted screwdriver, squeeze them out of their seats on the handle.

After the handle is removed, the body of the chainsaw is turned upside down. The hose coming from the oil tank to the pump will be visible immediately. It must be removed from the seat.

The pump itself is removed with an M5 screw and a wide washer. The screw length should be approximately 45-50 mm. A washer is put on the screw and it is screwed into the pump (the inside of the pump is threaded). Further, as the screw is screwed in, the stop from the washer will force the oil pump to rise along the thread. Thus, the pump is removed from its seat. Before starting work, we recommend that you read the article on how to disassemble the STIHL 180.

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For a better understanding of the pump removal process, you can watch the video below. In the video, the SC master shows in detail how to remove the oil pump from a chainsaw, and also describes the main malfunctions of the supply system.

The STIHL 180 oil pump is a very high-quality and reliable part, therefore it is necessary to change it only as a last resort, when all other elements of the system have already been checked.

After the pump is removed, it must be cleaned and blown out. As a rule, the main breakdown of an oil pump is its blockage. By removing it, the pump can be reinstalled.

Replacing the pump is only required if it is not possible to remove the blockage.

The oil pump of the STIHL 180 chainsaw is a reliable and unpretentious part, which is rarely the reason for the lack of chain lubrication. It is necessary to disassemble and change the pump only as a last resort, when there is confidence that the reason is 100% in it. You can do this with your own hands, since this operation is quite simple.

Chainsaw oil pump: repair, prevention

The chainsaw is an effective and simple tool in design, but it can malfunction with prolonged use. The oil pump of the chainsaw plays an important role in sawing wood, which supplies lubricant to the cutting edges through a special hole. During operation, the chain links are exposed to thermal and mechanical stress. Due to the oil supplied by the pump, friction forces are significantly reduced and, as a result, the intervals between chain sharpening or its replacement are increased.

Prevention measures

In order to prevent the occurrence of lubricant leaks, it is necessary to periodically maintain the oil pump of the chainsaw. During operation and after completion, it is necessary to observe oil leaks and, if they are detected, immediately tighten the connection elements.

Before starting work, check the lubricant level in the reservoir. It is best to use the chain oil recommended by the manufacturer. In no case should the mining be poured due to its heterogeneity of the structure and the presence of metal inclusions.

To prevent the formation of vacuum jams in the lubrication system, it is periodically necessary to blow through the oil pump channels with compressed air. Upon completion of sawing work, the unit must be cleaned from sawdust residues and dirt. At the beginning of the season, in order to evenly spread the lubricant through the channels of the chainsaw, it must be suspended in a vertical position in working condition for a few minutes.

Chainsaw chain oil does not flow: reasons and solutions

When the saw chain of the chainsaw is moved, a large amount of heat is generated in the groove of the tire due to friction. If oil does not flow to the chainsaw chain, it is necessary to stop work and take all measures to eliminate the malfunction of the lubrication system. The combination of heavy loads and overheating of the headset is accompanied by its accelerated wear and tear and early failure.

  • Without exception, all chainsaws and their electric counterparts are equipped with systems of the same type according to the principle of operation, through which the tire, the saw chain and its drive parts are lubricated.
  • This unit comes standard with a reservoir from which chain oil is fed to the inlet of a fixed or variable displacement pump.
  • Further, the working fluid in a metered amount enters the groove of the tire, in which the shanks of the saw chain are evenly distributed over the entire set and the working surface of the crown of the drive sprocket.
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The tires of performance headsets with a length of 400 mm are completed with a driven sprocket. Periodic bearing lubrication is carried out individually, after 6-8 hours of operating time.

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How to repair your STIHL chainsaw yourself: tips

The consumer can carry out repairs of the STIHL chainsaw independently due to the simplicity of the design. The tool, which has proven itself in the construction segment, has a power of 1400 W, an engine volume of 31 cubic meters. cm.

The tool has excellent recommendations, popularity among users. This is due to the reasonable price and quality characteristics. However, the operation of a chainsaw is periodically accompanied by breakdowns.

The reason for the appearance of oil leaks on the bottom of the chainsaw

The STIHL 180 chainsaw has a characteristic malfunction, which consists in insufficient sealing of the place where the oil hose is installed in the chainsaw body and the appearance of a leak in this place. To eliminate it, just remove the handle of the STIHL MS 180 saw, disconnect the hose itself, rinse and degrease the seat in the body and the hose end, then apply sealant and reinstall the hose. Such a simple operation will reliably eliminate the malfunction and the oil will stop leaking.

Malfunctions of the pump and the system as a whole

As you know, there is nothing eternal in this world and over time everything has to be repaired. So the oil system STIHL ms 180 is no exception, and has its own specific malfunctions. Let’s consider them in more detail.

Signs of a malfunctioning lubrication system are as follows:

  • the chainsaw chain is completely dry and does not shine;
  • oil does not leave the oil tank;
  • the chain stretches quickly and this happens all the time;
  • the saw bar is pulled to the side during sawing;
  • the tire heats up and in the area of ​​the leading sprocket, paint melting is observed.

All these signs directly or indirectly indicate problems in the chainsaw chain lubrication system.

The first thing to do after you suspect that chain oil is not being supplied is to check the supply. This can be done in two ways. The first is described in detail in the instructions for the tool and consists in the fact that you need to start the chainsaw, add gas as much as possible and direct it towards any obstacle.

With a working lubrication system, oil will fly off the tip of the tire and a strip of oily drops will appear on the surface towards which the tire is directed. If there are any irregularities in the system, the surface will remain clean.

Stihl MS170 chainsaw automatic oiler repair part 2

The second way is to remove the tire from the chainsaw and start it. With an increase in the engine speed, at the place where the tire shank is installed, oil will flow from the oil channel, if this does not happen, it is necessary to look for the cause of the malfunction.