How To Lubricate The Gearbox Of Petrol Cutters

How to lubricate a petrol cutter gearbox: choose a lubricant

Recommendations for the choice of lubricant for the gearbox, instructions for use.

What is a reducer

A mechanical gearbox is a module that converts torque. Basically, it is one or more gears rotating at high speed. In most cases, the gearbox converts the angular speed of rotation into a lower speed of the output shaft. This mechanism is called a demultiplier.

By the type of transmission, mechanisms are divided into several types:

  • Cylindrical gear cylinder is the main transmission element. A module of this class is installed on petrol cutters;
  • Worm gear transmission tool is a screw;
  • Bevel gear is provided by the intersecting arrangement of the shafts;
  • Planetary based on coaxial arrangement;
  • Wave;
  • Spiroid and combined.
How To Lubricate The Gearbox Of Petrol Cutters

How to lubricate a petrol cutter gearbox: choose a lubricant

The benzotrimmer is a convenient garden tool that does the job of cutting lawn grass, removing dead wood and weeds without fail. But, like any other tool, the device needs care: cleaning from dirt, sharpening knives, changing oil and, of course, lubricating.

What is a reducer?

Varieties of lubricants

Effective operation of the gear train is possible only in the absence of mechanical damage and under conditions of permissible temperature. At the slightest distortions, as well as overheating, the danger of jamming the mechanism increases sharply. And this is fraught with not only work stoppages, but also serious damage.

For the maintenance of mechanisms, lubricants of different consistencies are produced:

  • Semi-liquid colloidal system containing various additives and additives;
  • Plastic is most often used in gear and helical gears. This is the most versatile option;
  • Solid suspensions, plastic in their original state.

It is generally recommended to lubricate the petrol cutter gearbox with special gear compounds. The vast majority of them belong to semi-liquid systems.

When choosing the desired composition, you should pay attention to the temperature regime for which the mixture is intended.

How to lubricate the gearbox

A technological hole is provided in the housing for placing grease. The procedure is simple.

  1. The screw on the case is unscrewed.
  2. The hole is filled with at least 1 ml of grease.
  3. The screw is tightened.

The procedure should be performed after every 810 hours of continuous operation. It is also recommended to make sure that the module is lubricated before using the brushcutter for the first time. Otherwise, apply the mixture yourself.

Reducer-specific formulations are sold as tubes with a long dispensing spout. The diameter of the spout coincides with the size of the hole, although not always: the diameter may differ on models from different manufacturers. In this case, summer residents prefer to use a medical syringe: it is more convenient because it accurately measures out a portion of the mixture.

How to lubricate the gear mechanism of a petrol cutter is described in detail.

Lubricant for the gasoline trimmer gearbox.

Range of lubricants for garden equipment

According to the instructions, use a special transmission fluid grease to lubricate the bevel gear. As a rule, manufacturers of garden equipment produce and recommend the chemistry of their brand as the most adapted to their devices.

At the same time, in order to reduce the cost of operating garden equipment and increase the attractiveness of the auto chemistry brand, the lubricant for garden equipment is usually made multifunctional. It is designed not only to lubricate the gearboxes of petrol trimmers, but also to treat hoses, gears and gearboxes of any garden equipment and mechanical devices operating under high loads.

Even if the specialized gear lubricant is almost completely depleted during operation, the additives still create an effective lubricating protective film on the surface of the gears.

It should be noted that many owners of brushcutters in the vastness of the former CIS use ordinary Litol-24 or lithium-based grease for CV joints to lubricate the gearbox. It is convenient to refuel the reducer using a 5-cc medical syringe. Many motorists, instead of a side screw, pick up the thread and screw the grease gun from the old crosspieces of passenger cars. This modification allows the addition of Lithol without disassembling the assembly using a grease gun.

The undoubted plus of using Litol and lithium-based grease for refueling the brushcutter transmission is the reduction in the cost of operation. But there are nuances due to which spears break on the forums of gardeners of the Internet space. My thoughts on what can be lubricated with lithium-based lubricants and what not can be found in the article Litol as a lubricant for a brushcutter gearbox.

How often to lubricate the brushcutter gearbox.

Often, a routine inspection of a lubricated transmission is carried out once a year at the beginning or end of the season. If the gasoline trimmer is not used by you in professional volumes, this is enough.

For large mowing volumes, the brush cutter gearbox must be lubricated every 20-50 hours of operation. If the operating conditions of the garden equipment are difficult, for example, a large field is mowed at one time, and the brushcutter simply does not have time to cool down, or cheap lubricants are used, then the lubricant must be checked and added every 20 hours of operation.

An indirect indication that it is necessary to lubricate the gearbox may be overheating or increased noise of the unit. In these cases, if upon examination it is found that there is enough lubricant in the unit in terms of volume, then I recommend replacing it entirely, while it is advisable to choose another manufacturer of auto chemistry. Also, a complete replacement of the lubricant, with disassembly and flushing of the unit, I recommend when buying a used gasoline trimmer.

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Time and procedure for preventive maintenance of the reducer

I recommend that you carry out preventive maintenance of a new gasoline trimmer immediately after purchase, with the addition of lubricant to the gearbox. With all the high cost of garden equipment, some manufacturers save money and put in only a minimum of lubricant, during the running-in period.

How to lubricate the brushcutter gearbox. Gearbox grease.

Buying any equipment of its kind is a lottery, but a lot also depends on the gardener. In caring hands, Chinese samples serve for a long time and do not let their owners down at the wrong time. And if you forget in time lubricate the gear brushcutters, do not clean the filters, use cheap low-quality gasoline, then gardening equipment from the most famous brands will become a headache.

Lubrication of the brushcutter gearbox is one of the most important maintenance elements of the petrol trimmer, which must be carried out directly by the user.

How to lubricate a brushcutter gearbox, gasoline trimmer.

Side bolt 17 on the gasoline trimmer gearbox

For safety reasons, in order to avoid accidental start-up, all maintenance work on the brushcutter must be carried out with the electric cap / plug removed from the spark plug. Do not overturn the trim tab to avoid gas leakage.

We unscrew the side screw on the brushcutter gearbox. Depending on the manufacturer of the gardening tool, instead of the hexagon screw, there can be a turnkey bolt, usually 17. The thread is ordinary, unscrew it counterclockwise. Do not lose the sealing washer.

Adding specialized lubricant

If no grease is visible on the inside end of the screw, add 3 4 grams. Rotate the gear by hand, changing the direction of rotation so that the grease is distributed over the gears. Repeat the operation several times. On average, the gearbox contains about 5-10 g. The assembly must be completely filled with grease, taking into account the installation of the screw. Then reinstall the screw by tightening it securely.

As you can see, it doesn’t take much time or special skills to lubricate the gearbox on the brushcutter. Usually we get together longer than we do the entire amount of preventive work. Reliable gardening equipment for you. Share your experience in caring for gasoline trimmers in the comments.

Lubricant for the gasoline trimmer gearbox.

Range of lubricants for garden equipment

According to the instructions, use a special transmission fluid grease to lubricate the bevel gear. As a rule, manufacturers of garden equipment produce and recommend the chemistry of their brand as the most adapted to their devices.

At the same time, in order to reduce the cost of operating garden equipment and increase the attractiveness of the auto chemistry brand, the lubricant for garden equipment is usually made multifunctional. It is designed not only to lubricate the gearboxes of petrol trimmers, but also to treat hoses, gears and gearboxes of any garden equipment and mechanical devices operating under high loads.

Even if the specialized gear lubricant is almost completely depleted during operation, the additives still create an effective lubricating protective film on the surface of the gears.

It should be noted that many owners of brushcutters in the vastness of the former CIS use ordinary Litol-24 or lithium-based grease for CV joints to lubricate the gearbox. It is convenient to refuel the reducer using a 5-cc medical syringe. Many motorists, instead of a side screw, pick up the thread and screw the grease gun from the old crosspieces of passenger cars. This modification allows the addition of Lithol without disassembling the assembly using a grease gun.

The undoubted plus of using Litol and lithium-based grease for refueling the brushcutter transmission is the reduction in the cost of operation. But there are nuances due to which spears break on the forums of gardeners of the Internet space. My thoughts on what can be lubricated with lithium-based lubricants and what not can be found in the article Litol as a lubricant for a brushcutter gearbox.

How often to lubricate the brushcutter gearbox.

Often, a routine inspection of a lubricated transmission is carried out once a year at the beginning or end of the season. If the gasoline trimmer is not used by you in professional volumes, this is enough.

For large mowing volumes, the brush cutter gearbox must be lubricated every 20-50 hours of operation. If the operating conditions of the garden equipment are difficult, for example, a large field is mowed at one time, and the brushcutter simply does not have time to cool down, or cheap lubricants are used, then the lubricant must be checked and added every 20 hours of operation.

An indirect indication that it is necessary to lubricate the gearbox may be overheating or increased noise of the unit. In these cases, if upon examination it is found that there is enough lubricant in the unit in terms of volume, then I recommend replacing it entirely, while it is advisable to choose another manufacturer of auto chemistry. Also, a complete replacement of the lubricant, with disassembly and flushing of the unit, I recommend when buying a used gasoline trimmer.

How to lubricate the brushcutter gearbox. Gearbox grease.

Buying any equipment of its kind is a lottery, but a lot also depends on the gardener. In caring hands, Chinese samples serve for a long time and do not let their owners down at the wrong time. And if you forget in time lubricate the gear brushcutters, do not clean the filters, use cheap low-quality gasoline, then gardening equipment from the most famous brands will become a headache.

Lubrication of the brushcutter gearbox is one of the most important maintenance elements of the petrol trimmer, which must be carried out directly by the user.

Time and procedure for preventive maintenance of the reducer

I recommend that you carry out preventive maintenance of a new gasoline trimmer immediately after purchase, with the addition of lubricant to the gearbox. With all the high cost of garden equipment, some manufacturers save money and put in only a minimum of lubricant, during the running-in period.

How to lubricate a brushcutter gearbox, gasoline trimmer.

Side bolt 17 on the gasoline trimmer gearbox

For safety reasons, in order to avoid accidental start-up, all maintenance work on the brushcutter must be carried out with the electric cap / plug removed from the spark plug. Do not overturn the trim tab to avoid gas leakage.

We unscrew the side screw on the brushcutter gearbox. Depending on the manufacturer of the gardening tool, instead of the hexagon screw, there can be a turnkey bolt, usually 17. The thread is ordinary, unscrew it counterclockwise. Do not lose the sealing washer.

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Adding specialized lubricant

If no grease is visible on the inside end of the screw, add 3 4 grams. Rotate the gear by hand, changing the direction of rotation so that the grease is distributed over the gears. Repeat the operation several times. On average, the gearbox contains about 5-10 g. The assembly must be completely filled with grease, taking into account the installation of the screw. Then reinstall the screw by tightening it securely.

As you can see, it doesn’t take much time or special skills to lubricate the gearbox on the brushcutter. Usually we get together longer than we do the entire amount of preventive work. Reliable gardening equipment for you. Share your experience in caring for gasoline trimmers in the comments.

What kind of lubricant should I use for the trimmer gear?

In the process of operation, the mechanical part of the trimmer is loaded by contact forces on the teeth, resistance reactions from adhering grass (sometimes with dirt), dynamic, shock loads due to constantly changing torque. Lubrication for the trimmer gearbox must fully take into account these features, so the selection of the brand must be strictly individual.

The following factors are taken into account:

  1. Manufacturer’s brand. Each brand reasonably focuses on its own lubricants (you can talk about cheap Chinese products later). This applies to manufacturers such as Husqvarna, Stihl, Huter, Makita, etc. The only exceptions are trimmers of domestic production: for example, the Caliber in the user manual does not indicate the brand of lubricant at all
  2. The viscosity of the lubricant. As you know, all lubricants are divided into three groups of high-viscosity (colloidal systems containing various additives), plastic compounds for universal use and solid lubricants that soften during operation.
  3. Good adhesion to the surface of gearbox parts, as a result of which the grease is not squeezed out into the gaps or out of the unit.
  4. The rate of grease consumption by the gearbox. Here you have to rely on your own experience and the recommendations of specialists, since some trimmer manufacturers, relying on their own service centers, do not give clear recommendations at all regarding the period of operation of the gearbox between two lubrications.

Lubricant consumption also depends on the temperature at which it retains its lubricity. When the gearbox is heated to 40C, it is considered that its operating conditions are satisfactory, and there is sufficient lubrication.

It is believed that there is no universal grease for the trimmer gearbox, but this is not entirely true. In fact, a suitable lubricant will be one that contains the following components:

  • Lead-free antiwear additives;
  • Solid lubricants with the presence of graphite or molybdenum disulfide (the latter is preferable, since the lubricity is fully retained for a wide range of shaft revolutions);
  • Only mineral (inorganic!) Oils, highly refined.

These requirements are fully met by Gear Grease OREGON or Champion EP-0 lithium greases, domestic compositions Oleo-Mas, Litol.24, or Azmol 158, as well as those recommended by the manufacturer of a particular trimmer model.

Lubricant for trimmer gear. How and how to lubricate?

Occasionally, in the midst of an intense mowing operation, your trimmer will make an unpleasant grinding noise. This complains about the lack of lubrication, the gearbox is the most heavily loaded unit of the device. And soon, these warnings can be followed by a jammed drive.

How to lubricate the trimmer gearbox?

In the upper part of the body, where the gear block is installed, there is a technological hole, which is plugged with a screw during trimmer operation. This screw is unscrewed, and 1.52 ml of lubricant is injected into the hole using the spout on the tube. If the lubricant was purchased in a different package, then an ordinary disposable medical syringe is also suitable for this operation.

After that, the screw is installed in its original place. This procedure, regardless of the user’s recommendations, should be performed every 1015 hours of operation of the trimmer in working mode. Other reasons for updating or replacing the gearbox lubricant are the independent performance of minor routine maintenance (for example, cleaning and flushing the gears of the gearbox before the start of the summer season), repairing the unit, preserving the trimmer for the winter, etc.

If the gear unit is disassembled, it is recommended to completely remove the remnants of the old grease from the surface of the parts, even if it does not have any traces of oxidation and contamination. And only then apply new lubricant. After applying the lubricant, it is recommended to rotate the shaft several times by hand and make sure that the lubricant is evenly distributed over all parts of the gearbox.

When lubricating, pay particular attention to the following elements:

  1. Flywheel: as a rule, grass remnants stick to its surface intensively, and thickening grass juice creates additional resistance.
  2. Pawl of the starter coil, which, in the process of turning on the drive, constantly contacts the grooves on the flywheel. In this case, not only mechanical wear occurs, but also mechanochemical corrosion of the flywheel-dog connection, since the materials of this pair are different (the flywheel is aluminum, and the dog is steel).
  3. Bearings, if their seals are worn out, and through them, the remaining grease is squeezed out. In this case, the unit begins to vibrate intensively when loaded. This happens with Chinese-made trimmers, so in the long run it is worth thinking about replacing the bearing assembly with a better one, for example, from the Swedish company SKF.

Lower and upper gear lubrication

There are tips that recommend lubrication at the end of the season. However, most people find it best to do this at the beginning of each season. When we repair a unit, as well as carry out any disassembly, it is necessary to use lubricants. The gearbox must be additionally lubricated when the old trimmer is inserted.

Modern trimmers are equipped with a gearbox that measures the angle of transmission of mechanical energy between two components: the shaft and the head. Bevel gears are considered common, they can easily withstand high speeds, are equipped with smooth engagement, as well as an increased level of bearing capacity. The housing includes a shaft, a gear wheel, which is pressed onto the driven shaft. In order to reduce friction, bearings are installed on the bearing points of the shaft.

How and how to lubricate the gas cutter gearbox?

Responsible maintenance is the key to long tool life. One of the requirements in the work of a petrol cutter is the timely lubrication of the gearbox, as well as cleaning the filters. Every user of such a unit knows what composition to lubricate the gearbox with. First, it is cleaned in several stages, then the element is removed from the casing. It is cleaned with gasoline and dried. The place for the filter is prepared thoroughly, cleaning it from dust and old oil. The main signal for lubrication of the petrol cutter gearbox is extraneous noise and rapid heating of the equipment. This means that it is necessary to lubricate the spare part as soon as possible. The lubrication frequency is specified in the instructions for the brushcutter. The experts say that gearbox maintenance should be done every 15 hours.

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Petrol trimmer grease

Correctly selected brushcutter care guarantees the durability and quality of the equipment. Manufacturers try to take into account all the nuances and prescribe what materials to use for maintenance. Usually, a specific type of lubricant is not specified, it is simply given generally known standards that lubricants must comply with.

The lubricant must be selected in such a way as to take into account temperature conditions, rotational speed, load dynamics and vibration. The main requirement is that this mixture remains in the zone of maximum friction.

Based on the above information, it should be noted that manufacturers of petrol cutters are developing universal additional tools for their equipment. It can be served with general industrial compounds. The main condition is compliance with the operating conditions, namely, the presence in the composition of a substance against rust and lime, as well as a filler, which consists of a solid lubricant. Grease is poured into the gearbox through a special hole, the unit is not dismantled.

Replacement is done quickly enough.

  1. First, turn off the device from the network. Devices running on gasoline must be drained of gasoline.
  2. If the lubricant changes completely, then be sure to flush the gearbox. To do this, first fill in the cleaner, then rinse the gearbox well, then drain. It is important to clean the entire case.
  3. Use the special tool that comes with the trimmer to unscrew the gearbox plug.
  4. Apply new grease: insert a syringe with a tube into the hole and squeeze out the grease (2-5 ml).
  5. We turn the shaft manually, turn on the scythe at low speed without load. This is necessary in order for the lubricant to be efficiently distributed in places subject to maximum friction.

Prevention and possible malfunctions of the gearbox

The brushcutter requires first maintenance immediately after purchase, because the manufacturer puts in a small amount of lubricant. If the trimmer does a small amount of work, then lubricate the device at the beginning and end of the season. If the brushcutter works a lot, then we lubricate it after 30-55 hours of operation.

The main malfunctions include the most common options.

  • Strong heat. This indicates that the lubrication has run out. It is necessary to add lubricants and run them in a low mode.
  • Gearbox vibrates or wobbles. This situation indicates mechanical damage.
  • There is a knock. Then the bearing collapsed, the boot was damaged.
  • If the trimmer blade is jammed, then the mechanism should be changed completely.

How to properly lubricate the brushcutter gearbox, see below.

The stage of applying grease to the bearing. Gearbox lubrication stage

The gearbox must be filled with such a volume of grease that it completely covers the gears.

Control of the sufficiency of lubrication for the LBM gearbox is carried out by turning on the grinder for a short time. If, after 35 minutes of operation, the temperature of the assembly has increased and lubricant is leaking out, part of its volume must be removed. To do this, the gearbox is disassembled again, the excess is removed with a rag or rag.

When checking, the opposite situation can be observed, when noise appears when the angle grinder is turned on. This means that there is not enough lubricant and must be added.

When using a grinder, a periodic check of the adequacy of lubrication of the gearbox elements, the quality of the available lubricant is required.

Which lubricant to choose

  • The use of expensive special lubricants for gearboxes from well-known brands;
  • The use of universal compounds suitable for any power tool;
  • Gear lubrication with lithol or grease;
  • Use of self-made lubricant.

Application of special materials is the best solution. When choosing a lubricant for a gearbox, it is recommended to give preference to formulations produced under the same brand as the grinder itself. For example, if the machine is of the AEG brand, then the lubricant must be purchased from the same brand.

When using specialized products, the service life of angle grinders is significantly increased, since the manufacturer takes into account all the features and nuances of operating its own equipment. The disadvantage of using branded materials is their high cost, which can affect the family budget.

The most unfavorable solution is the use of lithol or solid oil, since both of these materials are not designed for lubrication of friction units heated to high temperatures. Some owners of grinders use only these formulations, which is why their machines cannot last for the lifetime declared by the manufacturer. In an effort to benefit from the here and now, they do not factor in future spending on a new tool or replacement of expensive parts.

Old grease removal phase

Removing used grease is the first step in gearbox maintenance. It is necessary to remove the old layer for several reasons:

  • The spent lubricant is not able to perform its functions;
  • It contains small particles formed during the wear of the rubbing elements;
  • The old grease will mix with the new one, because of this, the unit will not work properly, replacement will not bring any results.

Removal of waste is carried out using disposable paper towels, rags or a piece of tissue at hand. The removed parts of the gearbox should be thoroughly washed in thinner or gasoline, and dried before installation. Residues from cleaning materials can also mix with the new grease and change its consistency, resulting in poor performance.

How to properly lubricate the angle grinder How much lubricant is required to replace

Therefore, it is better to first put in a little more material than required, and make sure that the lubricant is evenly distributed after the gears of the reducer are activated. The generally accepted norm is to fill with lubricant about 40% of the volume of the gearbox.