How To Lubricate The Trimmer Gear

How to lubricate the gearbox of lawn mowers, petrol trimmer.

How To Lubricate The Trimmer Gear

Side bolt 17 on the gasoline trimmer gearbox

For safety reasons, in order to avoid accidental starting, all maintenance work on the lawn mower must be carried out with the electrical cap / plug removed from the candle. Do not overturn the trim tab to avoid gasoline leakage.

Unscrew the side screw on the lawn mowers gearbox. Depending on the manufacturer of gardening tools, instead of a hexagon screw, there can be a turnkey bolt, more often by 17. The thread is ordinary, we unscrew it counterclockwise. Do not lose the sealing washer.

Adding specialized lubricant

If grease is not visible on the inner end of the screw, then add 3 to 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 unit 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 a lawn mower. Usually we get together longer than we carry out the entire amount of preventive work. Reliable gardening equipment for you. Share your petrol trimmer care experience in the comments.

How to lubricate a petrol trimmer

BUT EXCEPT THE REDUCER NEED TO LUBRICATE AND THE SHAFT NEAR THE CLUTCH THIS IS YESTERDAY https://www.Youtube.com/watch?V=39YMjVhcYE4 my first channel: https://www.Youtube.com/channel/UCYBQX5vNSc Vitek or tel. 380979677418 what I can, so I will help. You can find me: facebook: https://www.Facebook.com/profile.php?Id=100010981502271 VK: https://vk.com/id215995668 classmates: https://www.Ok.ru/profile/573072379585 twitter : https://twitter.com/VitekOrk

How to lubricate the Ork TV-Life channel lawn mowers gearbox

During the operation of the gasoline trimmer, the gearbox begins to emit grinding sounds, which are a sign of the lack of lubrication, or the loss of its properties. Of course, the owner may not attach much importance to extraneous noise, but ignoring them will lead to jamming of the gears and, as a result, the upcoming expensive repairs. Therefore, in order to avoid the prerequisites for the appearance of a grinding noise, it is necessary to follow the lubrication regulations of the trimmer gear recommended by the manufacturer.

Gasoline trimmer reducer grease.

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 for the treatment of 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 gear surface.

It should be noted that many owners of lawn mowers 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 filling the transmission of lawn mowers is a 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 Lubrication of the Lawn Mowers Gearbox".

How to lubricate the trimmer gear or lawn mowers

Before you lubricate the gearbox of lawn mowers for the first time, you need to carry out preventive maintenance on the tool itself, and check for the presence of the lubricant put into the gearbox by the manufacturer. During operation, the lubricant is applied at the beginning and at the end of the season, and with intensive operation of the mechanism. every 30-50 hours of operation. Many readers and customers are interested in: how to lubricate the trimmer gearbox?

Our experts answer briefly and comprehensively:

  • The product should be appropriately named: "Trimmer Gear Lubricant". That is, trimmer lubricant is a completely different substance;
  • The lubricant should be a transmission fluid grease, although today the manufacturer manages to fill the market with universal grease samples that fit all trimmer parts. Theoretically, it cannot be an ideal tool, due to the specific operating temperatures and friction force in each individual unit of the tool, but if you have not found a special one, you can try the universal one (carefully reading the instructions);
  • If you need to lubricate the electric gearbox, as, for example, on the Makita ur3501 tool, then the choice of the grease of the same name will be optimal. This also applies to other trimmers like Stihl, Champion;
  • For those trimmers whose brands do not produce special gear lubricant, you can use universal tools, after reading the instructions and comparing them with the parameters of your tool;
  • We strongly discourage the use of Litol and lithium-based products, as they are not intended for the trimmer gearbox a priori.

It is possible to understand that the lawn mower, more precisely, its gearbox needs lubrication, can be due to the fact that the tool overheats and the occurrence of noise inside the unit. In situations where noises are present, but the grease on the gearbox too. it must be completely replaced with a new one, but already from another manufacturer. The gearbox must be completely disassembled and lubricated no more than once a year. Several nuances of the lubrication procedure itself:

  • Do not turn the trimmer, otherwise gasoline will leak.
  • Remove the electrical plug (cap) from the spark plug to avoid accidental starting for safety reasons.
  • We unscrew the side screw on the gearbox, without losing the sealing washer, counterclockwise. We use a 17 key or a hexagon.
  • In the absence of grease on the outer end of the screw, apply it in a volume of 3-4g.
  • Scrolling the gear. we will help the lubricant to be distributed over the gears.
  • The procedure is carried out several times.
  • We tighten the screw back, not forgetting about the sealing washer.

Your tool also requires lawn mower oil during use. It is also better to purchase it in advance so that the internal elements of the engine work properly and do not suffer premature wear.

How to lubricate the trimmer gear

Disassembled lawn mowers gearbox

Almost every lawn mower gearbox is equipped with a small technological hole, which is plugged with a special bolt during operation. After thoroughly cleaning the unit from grass residues and debris, it is necessary to unscrew the screw and inject 1.5 to 3 ml of grease into the gearbox cavity, depending on the brand of the tool. For ease of dosing, you can use a traditional medical syringe. During the operation, foreign particles and objects must not be allowed to enter the gearbox, as this can lead to intensive wear of the gear train, as well as its jamming.

Experts recommend that at the end of the mowing season and long-term storage of the tool without work, disassemble the gearbox, wash gears and bearings, and re-lubricate the unit.

If you are not lazy, share your experience, who lubricates the trimmer gear with what, and how often. And then he began to bask. Thank.

I use Huskvarnovskaya grease for gearboxes on my Calm 130th! In a tube of 225g, at a price of 210 rubles! There is no particular difference which manufacturer to buy grease, they are all the same! Control after 20-25 moto. Hours. How much lubrication is required? About 5gr, or until the gears of the reducer are closed with grease! On account of the fact that the reducer is heating up: On my Calm, when it is in operation, the reducer is always warm. This is normal! On your lawn mower, the reducer gets very hot?

Thank. I also think that heating is in the order of things. I wanted to know what besides special lubricants? The farm has accumulated a lot of automotive lubricants, including expensive gear oils. Maybe some of this ?

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Do not use in any way! You just ditch your braid! Get those materials that are intended for garden equipment! You take one for a car, but for another business these materials are simply not intended! With oil for your braid, do not think to experiment either! You have an Echo scythe, then take the Echo oil! Not Shtilevskoe, and not another firm! But only your own! This is on gearboxes no matter what company the material is, but it will not work on engine oil!

Buying any technique 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 to lubricate the gearbox of lawn mowers in time, do not clean the filters, use cheap low-quality gasoline, then garden equipment from the most famous brands will become a headache.

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

Lubricant for trimmer gear: which one to choose?

Choice of reducer paste

Currently, the market for gas powered tools and consumables offers a wide range of greases that are designed to reduce friction and overheating of rubbing parts. Therefore, each owner, when the time comes for maintenance, is faced with the problem of how to lubricate the trimmer gear for its long-term operation. For these purposes, special plastic pastes are used, which differ in properties and manufacturer.

Device

The trimmer gearbox includes 2 shafts. the first is driven by the engine, and the other is used to rotate the lawn mower’s cutting blade or trimmer line. Bevel gears are made as a single unit with the shaft, but there are versions with the installation of a separate part on a spline connection. Models are available with different tooth angles depending on the tool layout. There are modifications of gearboxes with worm gear, planetary or mixed (multistage) gears.

The shafts are mounted on rolling bearings, which are covered with protective washers. Parts ensure lubricant retention and prevent dirt from entering the working paths. The bearings are mounted in an aluminum alloy gear housing. The unit is detachable, consists of 2 symmetrical halves, which are connected with screws. To ensure the tightness of the joint, a separate gasket or sealant is used.

The lower trimmer gear is installed on the tool through the seat. There are several types of joint, differing in shape.

There are modifications of the tool with a square or multi-faceted joint of elements. The transmission of torque is carried out through a spline connection.

Replacement process

  • Unscrew the coil from the gearbox. This is quite simple to do, since it is screwed onto the thread of the gear wheel. It is enough to insert a screwdriver into the hole between the mechanisms, and then gently turn the coil until its end falls into the recess of the slots. Holding the screwdriver in this position with one hand, unscrew the spool with the line with the other.
  • To disassemble the structure consisting of a gearbox and a rod, you first need to unscrew the centering bolt of the faulty mechanism, and then loosen the second (clamping) bolt.
  • Remove the old gearbox from the boom.
  • Deliver a new part according to the same algorithm, proceeding in the reverse order.

Basic malfunctions and remedies

Common node breakdowns:

  • Jamming of shafts during operation, the appearance of knocking or axial movements of the shafts. The cause of the breakdown is the wear of the rolling bearings, which must be replaced with new ones.
  • Separation of the gearbox from the tool bar guide during operation. The defect manifests itself when the seat is worn or when the body is cracked. Repair consists of replacing broken parts. Temporary fixation of the unit by means of clamping clamps is allowed.
  • When installing the gearbox on the rod, there is a gap that does not provide fixation. As a temporary measure, you can compensate for the gap by winding electrical tape around the rod. Subsequently, you will have to either replace worn parts, or purchase a new tool.
  • The reduction gear for the trimmer is subject to increased stress and heat during operation. Overheating of the unit occurs when there is an insufficient amount of lubricant or its poor quality. Also, the phenomenon occurs at the time of grinding in new gears.
  • There is no rotation of the output shaft, or the tool stops under load. In this case, a grinding sound may occur. A similar defect occurs when the teeth on the gears are cut or worn. To restore functionality, you need to install new elements.

How to choose a new one and make a replacement

The lower gear is the most stressed part of the trimmer. Even under normal operating conditions, it is subject to wear: microcracks appear in the metal, which gradually increase; gearbox bearings also deteriorate over time.

To replace the gearbox, you need the following tools:

  • A flat screwdriver that fits the hole in the bottom of the unit body;
  • A set of key-heads, the size of which is selected for a specific tool.

The main malfunctions of the trimmer gearbox: how to fix the breakdown, how to lubricate,

The trimmer gearbox is designed to transfer torque between tool shafts located at different angles. In good condition, the unit works silently, but when the elements wear out, it starts to make noise and overheat. Long-term operation of such a unit leads to the complete destruction of the gears and the housing.

How to lubricate the trimmer gear

Lubricate the trimmer gear regularly according to the tool manufacturer’s recommendations. In this case, it is recommended to apply an antifriction agent to the drive shaft located in the rod. The lubricant is introduced into the crankcase cavity of the gearbox through a special hole closed with a screw plug. First, you should clean the unit from dirt. When carrying out repairs and replacing gears or bearings, it is required to remove the remnants of the old oil and add a new one.

The types of lubricants for gearboxes are classified by consistency:

  • Liquid or semi-liquid;
  • Plastic;
  • Solid.

Also, the characteristics of the grease depend on the base base:

  • Graphite, contains a complex of additives that reduce the risk of scoring. Has a hard or plastic consistency.
  • Lithium, which further reduces cell corrosion. Belongs to the category of plastic.
  • Universal, consisting of mineral oil and a complex of additives. Refers to the category of liquid or semi-liquid lubricants.

The most widely used greases are Litol-24, Champion EP-0, Gear Grease Oregon, as well as their counterparts made by other manufacturers. The list of recommended lubricants and their parameters are indicated in the trimmer repair and maintenance instructions.

How often do you encounter problems with the lower trimmer gear? Can you fix the problem yourself??

Used types of grease

When choosing a lubricant, you must consider the following factors:

  • The degree of adhesion of the compound to the metal of the assembly;
  • Product brand;
  • Lubricant consumption by transmission mechanism.

Well-known manufacturers, for example, Stihl, Husqvarna and others, besides trimmers, also produce lubricants for them. These products not only reduce wear, but also protect the gear metal from corrosion. Therefore, for lawn mowers from these brands it is better to use their own lubricant products.

Different models have different grease consumption. This is largely due to the intensity of the lawn mowers‘ use and the heating of the transmission. It is considered that the lubricant is sufficient if the temperature of the reducer during operation does not exceed 40 ° C.

By consistency, trimmer lubricants can be:

  • Liquid;
  • Semi-liquid;
  • Solid;
  • Plastic.

In terms of composition, the following types of lubricants are in demand:

  • Graphite, significantly reducing friction, as a result of which the rotation of the gears is improved;
  • Lithium, which is also an excellent anti-corrosion composition, saturated with additives that increase the wear resistance of the metal without harmful substances;
  • Multipurpose, highly refined mineral oil containing components that improve performance.

Examples of suitable lubricants are: Champion EP-0, Gear Grease OREGON, Oleo-Mas, Azmol 158, Litol. 24. You should also pay attention to the advice of manufacturers on this issue and use the materials they offer. You can buy them in specialized outlets.

Champion EP-0 universal grease 120 gr

Repair and lubrication of the trimmer gear

With frequent, intensive use of lawn mowers, the gearbox may start to warm up or make sounds unusual for its normal operation, such as grinding sounds. This indicates that the mechanism needs to be lubricated. If this is not done on time, then more serious problems will arise (for example, gears will quickly wear out and need to be replaced), up to jamming. Other breakdowns also occur with the transmission. Repair and lubrication of the gearbox can be done independently. for this you just need to familiarize yourself with the features of these works and stock up on some of the available tools.

Gearbox self-lubrication algorithm

No preliminary disassembly is required to lubricate the transmission. A special hole for these purposes is already embedded in the device (it is shown in the photo below). In addition to gears, during lubrication, attention should be paid to the following elements of the mechanism:

  • Bearing unit;
  • Flywheel and starter coil pawl.

Lubricant injection hole

Fill in oil or add solid lubricant through a grease nipple closed with a screw. In this case, actions are performed in the following sequence:

  • Clean the gearbox housing from dirt and adhered grass, especially carefully the area around the plug so that debris does not get inside the mechanism;
  • Using the appropriate tool (it often comes with a trimmer), unscrew the plug;
  • In the open technological hole, the selected lubricant is injected from a tube, or using a syringe, as shown in the photo below;
  • Screw the plug into place.
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Gear lubrication

If for any reason the gearbox needs to be disassembled, then the old lubricant must be completely removed from the entire surface of the gears and the housing, the shaft, and only then use a new one. The disassembled mechanism is convenient to lubricate with solid compounds.

The whole gear lubrication process is demonstrated in the:

Lubrication of the transfer unit is required at least once a year, but it is recommended to do this every 20 hours of intensive use of the lawn mower. If the first signs of malfunctions appear with the mechanism, then the lubricant must be applied as soon as possible.

Trimmer reducer device

A trimmer gear is a unit that transmits the rotational motion of the motor shaft to a knife or line. It is located at the lower end of the lawn mower bar. The transfer unit is also designed to reduce the trimmer engine speed.

The mechanism consists, depending on the model of the lawn mower, of several gears rotating at high speed. As a result, they heat up due to strong friction. If there is not enough lubricant, or there is none at all, then the process leads to severe overheating and failure of parts, and, accordingly, the need to carry out complex repairs. To prevent this from happening, the transmission unit should be lubricated in time. The disassembled gearbox is shown in the photo below.

Gearboxes of modern trimmers of different models from different manufacturers differ from each other in design and seat size. It happens:

  • Round;
  • Asterisk;
  • Square.

Lawn mowers are equipped with gearboxes with different types of gears:

  • Conical;
  • Worm gear;
  • Spiroid;
  • Cylindrical;
  • Planetary;
  • Wave;
  • Combined.

The drive shaft and gearbox are heavily loaded trimmer assemblies that are subject to significant wear. Between them, movement is transmitted due to the engagement of the teeth of the gears located at different angles to each other. The gear train works effectively only if there is no mechanical damage. In this case, the mechanism should not overheat, otherwise it may jam.

Trimmer Gear Lubrication

The gears must be lubricated regularly in accordance with the recommendations set forth in the operating instructions for the model used. This should also be done if:

  • New gears were installed;
  • Atypical sounds emanate from the gearbox during trimmer operation;
  • The knives are turning hard.

With continuous use of the trimmer, the transmission is subjected to stress from grass adhering to the blades, dirt, or due to changes in torque. High-quality lubricant must be selected to extend the life of the gearbox.

Basic gearbox malfunctions and ways to eliminate them

Various breakdowns occur with the gearbox of an electric or gasoline trimmer. The most frequent ones are presented in the table below. There you can also find the causes of their occurrence and methods of elimination.

Gearbox malfunctionPossible causes of failureRemedy
the transfer unit is very hotuse of an unsuitable (low-quality) lubricant or its absenceyou need to replace or add lubricant
the gears are new and not wornfor running-in, run for a short time without heavy loads with regular stops so that the mechanism has time to cool down
jamming of the shaft during rotation, the appearance of backlash and knockingdestruction or significant wear of any of the bearingsreplace the failed bearing with a new one
the transmission mechanism flies off the mower bar or staggersdamage to its hullit is necessary to replace the part
in some cases, with minor damage with a clamp made of metal, the place is pulled together with a break
not fixed to the pipedocking wearyou can make an insulating tape rewind at the attachment point or change the bar
the output shaft with a knife does not rotate or stops in case of an increase in loadwear of teeth on gears or one of themreplacement of the interacting pair of worn parts is required

Bearings are destroyed due to the use of inappropriate lubricant or due to lack of it. Also, their damage is caused by the harsh operating conditions of the lawn mowers and the ingress of foreign material particles (for example, broken metal teeth of mechanical transmissions) due to the fact that the integrity of the anthers is broken.

To remove the bearing, you need to disassemble the gearbox and use a special puller. If it is not there, then you can try to do it with a hammer with a guide. In this case, work should be done carefully so as not to damage the seat. It is not recommended to use the preheating method to shoot the bearing. This is due to the fact that the metal can lose the required performance.

Most gearbox problems can be easily fixed by hand. Replaceable parts are recommended to be purchased "native" intended for the used lawn mower model.

Lubricant for trimmer gear. How and how to lubricate?

Sometimes, in the midst of an intense mowing operation, your trimmer will start to 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" may be followed by a jammed drive.

What kind of lubricant should be used for the trimmer gear?

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

The following factors are taken into account:

  • Manufacturer’s brand. Each brand reasonably focuses on self-made 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 made in Russia: for example, the Caliber in the user manual does not indicate the brand of lubricant at all.
  • The viscosity of the lubricant. As you know, all lubricants are divided into three groups. high-viscosity (colloidal systems containing various additives), universal plastic compounds and solid lubricants that soften during operation.
  • 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.
  • 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 the availability of 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 40 ° C, 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 in this case 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.

How to lubricate the trimmer gear?

In the upper part of the body, where the gear unit is installed, there is a technological hole, which is plugged with a screw during trimmer operation. This screw is unscrewed, and 1.5. 2 ml of grease is injected into the hole with the help of 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 reinstalled. This procedure, regardless of the user’s recommendations, should be performed every 10. 15 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 turn 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:

  • Flywheel: grass remnants tend to stick to its surface intensively, and thickening herbal juice creates additional resistance.
  • The dog 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).
  • Bearings, if their seals are worn, and through them grease residues are squeezed out. In this case, the unit begins to vibrate intensively when loaded. This happens with Chinese-made trimmers, so it is worth considering in the future to replace the bearing assembly with a better one, for example, from the Swedish company SKF.
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Factors for choosing a gearbox lubricant lawn mowers

Often, the owner of a particular brand of gasoline trimmer is not able, for some reason, to purchase a lubricant recommended by the manufacturer. In such cases, it will be necessary to search for an analogue, which in its properties will be identical to the branded paste. Therefore, when choosing a paste for a lawn mower gearbox, you should pay attention to the following factors:

Lawn Mowers Gear Lubrication

  • The viscosity of the lubricant. All pastes on the market are divided into three main groups, namely: high-viscosity (contain additives), solid lubricants (soften during operation of the unit) and universal plastic compounds.
  • The rate of grease consumption. This factor is taken into account based on the personal experience of the owner, and is characterized by the period between two lubrications. Most manufacturers require to service the gearbox every 20-40 hours of operation.
  • Degree of adhesion to gearbox parts. This indicator is characterized by the adhesion of the grease to the metal trimmer assembly.

Lubricant for trimmer gear: which one to choose?

Choice of reducer paste

Currently, the market for gas powered tools and consumables offers a wide range of greases that are designed to reduce friction and overheating of rubbing parts. Therefore, each owner, when the time comes for maintenance, is faced with the problem of how to lubricate the trimmer gear for its long-term operation. For these purposes, special plastic pastes are used, which differ in properties and manufacturer.

Trimmer reducer device

Regardless of the manufacturer and model, a modern trimmer is equipped with a gearbox to change the angle of transfer of mechanical energy between the drive shaft and the head with a line. The most widespread in lawn mowers are bevel gears, since, unlike spur gears, gears with helical teeth are able to withstand high speeds, have smoother engagement and have increased bearing capacity.

Main parts of the trimmer gearbox

The duralumin housing (1) contains a pinion shaft (2) and a bevel gear (3) pressed onto the driven shaft (4). To reduce the frictional forces during rotation, rolling bearings (5) are installed on the bearing points of the shafts. Any gear transmission is a highly loaded mechanism, the duration of operation of which, noiselessness and reliability of which depends primarily on the lubricant. Therefore, in addition to the main components listed above, the trimmer reducer device includes a special hole through which you can lubricate the bearings and gears without disassembling the unit.

Trimmer Gear Lubrication: Selection Criteria

During the operation of the gasoline trimmer, the gearbox begins to emit grinding sounds, which are a sign of the lack of lubrication, or the loss of its properties. Of course, the owner may not attach much importance to extraneous noise, but ignoring them will lead to jamming of the gears and, as a result, the upcoming expensive repairs. Therefore, in order to avoid the prerequisites for the appearance of a grinding noise, it is necessary to follow the lubrication regulations of the trimmer gear recommended by the manufacturer.

Lubricant for famous brands of trimmers

Each brand of petrol trimmers always recommends its own production of lawn mowers gear lubricant.

  • Husqvarna. This Swedish manufacturer recommends the use of Multi-Purpose Grease Grasa Universal. This material is available in blue-black tubes with a volume of 225 or 250 grams. According to the company, this trimmer gear lubricant has been specially developed for Husqvarna machines, taking into account the steels and working speeds used.
  • Stihl. For Stihl FS series lawn mowers, the manufacturer advises to use Stihl Superlub FS gear lubricant, offered in 225 gram tubes or 80 gram disposable containers, silver-orange.
  • Patriot. It is recommended to service the lawn mower gearboxes of this brand with original Arsenal AR-417 lithium grease. It is specially designed for geared gears operating at high speeds and temperatures.
  • Huter. For the bevel gear of the tool models of this Huter company, you can use any of the above brands of gear lubricants, as well as universal types of Rezoil, CIATIM and others.
  • Champion. CHAMPION Super-Lube EP-O is the recommended lubricant in the Champion Lawn Mower Owner’s Manual. The material is supplied in a 250 gram jar or in a Premium Champion C1104 disposable oiler.
  • Makita. This Japanese manufacturer advises its consumers to use Makita branded lubricant, which comes in 65 ml and 80 ml white tubes with red caps.

How to lubricate the trimmer gear

Disassembled lawn mowers gearbox

Almost every lawn mower gearbox is equipped with a small technological hole, which is plugged with a special bolt during operation. After thoroughly cleaning the unit from grass residues and debris, it is necessary to unscrew the screw and inject 1.5 to 3 ml of grease into the gearbox cavity, depending on the brand of the tool. For ease of dosing, you can use a traditional medical syringe. During the operation, foreign particles and objects must not be allowed to enter the gearbox, as this can lead to intensive wear of the gear train, as well as its jamming.

Experts recommend that at the end of the mowing season and long-term storage of the tool without work, disassemble the gearbox, wash gears and bearings, and re-lubricate the unit.

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 needs additional lubrication 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, and also 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 gearbox of lawn mowers?

Responsible maintenance is the key to long tool life. One of the requirements in the operation of the lawn mower 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 carefully, cleaning it from dust and old oil. The main signal for lubricating the lawn mowers 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. For lubrication intervals, refer to the instruction manual for your lawn mower. Experts say gearbox maintenance should be done every 15 hours.

Petrol trimmer grease

Correctly selected lawn mower 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 indicated, 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 lawn mowers manufacturers are developing universal additional tools for their equipment. It can be served with general industrial compositions. The main condition is compliance with the operating conditions, namely, the presence of an anti-rust and lime agent in the composition, 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.

  • First, turn off the device from the network. Devices using gasoline must be drained of gasoline.
  • 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 case completely.
  • Use the special tool that comes with the trimmer to unscrew the reducer plug.
  • Apply new lubricant: insert a syringe with a tube into the hole and squeeze out the lubricant (2-5 ml).
  • We turn the shaft manually, turn on the scythe at low speed without load. This is necessary so that the lubricant is qualitatively distributed in places subject to maximum friction.

Prevention and possible malfunctions of the gearbox

The lawn mower requires the first preventive maintenance immediately after purchase, because the manufacturer uses 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 lawn mower works a lot, then grease 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 at low mode.
  • Gearbox vibrates or wobbles. This situation indicates mechanical damage.
  • There is a knock. Then the bearing collapsed, the boot is damaged.
  • If the trimmer knife is jammed, then the mechanism should be changed completely.

How to properly lubricate the gearbox of lawn mowers, see below.