Lubricating the lawnmower gearbox
When is it necessary to lubricate the gearbox of a lawn mower? When you suddenly hear a strange and annoying grinding noise when you’re cutting the grass or intensively combating brush on your lawn, one of the most common reasons is that your brushcutter’s bottom gearbox doesn’t have any lubricant. To avoid this, there is a scheduled technical inspection. The gearbox of a petrol grass trimmer is a particularly vulnerable part, because it is exposed to dust directly above the ground or to moisture when the grass is wet or dewy after a rainstorm. That’s why you should change the oil in the gearbox of your lawnmower regularly if you don’t want the spline shaft to get jammed.
How to Choose a Grass Trimmer Bottom Gear Lubricant? Due to the fact that the gearbox is constantly exposed to significant mechanical shock and dynamic loads, lubrication oils must be selected particularly carefully based on the requirements of the specific mower. If the manufacturer has specified which oil to lubricate the gearbox in the service book, this is a good thing. But sometimes this “trifle” is neglected and then you have to find information on the Internet or other sources on the subject.
Lawn mower gear lubricants are sometimes made by the same manufacturers that make the lawn mower, under the same brand name. Especially these are well known, promoted brands. But not necessarily. There are many worthy manufacturers of chain saws that produce proper quality lubricants for their products. For example Sturm, Vityaz or Procraft. The normal requirements for such greases are that they adhere well to the surfaces, so that they adhere well to the gears. And also the viscosity. The viscosity must be sufficient not to impede the operation of the entire mechanism while at the same time not extruding or seeping out through the shallow holes of the assembly. There are lubricants with different additives that should be treated individually. Oils with various additives can improve the quality of lubrication and increase the life of the grass trimmer.
There are universal greases. In addition to the grease recommended by the manufacturer of the mower, many use the usual Lytol-24, Shrus-4 or Azmol 158, which can easily be purchased at retail outlets, or are often already available in many motorists. You can also use graphite grease for the gearbox of your YUKO 375 grass trimmer. These are not expensive lubricants meet the basic requirements for lubricants for the reducers of gasoline trimmers.
When to lubricate the gearbox of a lawnmower? You will not find many brands and models that give clear recommendations. As it depends on many factors. How much time you mow, what conditions, what temperature, what kind of grease is used, etc.д.You can completely replace the grease before the next mowing season or after 15-20 hours of operation. To do this unscrew the gearbox, remove all the old grease and lubricate all the parts before reassembling. Grass trimmer shaft does not need to be lubricated. You can also simply put grease in the gearbox through the hole of unscrewed bolt. It is located on top of the gearbox and covers the special technological hole. Grease is injected into this hole through the narrow tube nozzle or using a needleless medical syringe. But then the old grease left over from work, along with particles of exhausted metal, mixes with the new grease, which reduces the life of the.
It is worth noting that there are some models of chain saws that are equipped with gearboxes that do not need lubrication. You won’t find a lubrication hole in these gearboxes. They are designed for a full service life.
How to lubricate a brushcutter gearbox in an easy way
How to correctly lubricate a brushcutter gearbox? Many trimmer users don’t attach importance to overheating the gearbox of their mower head. And, of course, when it breaks down they immediately run to a repair shop. To save time and money for repair, you just need to lubricate the gearbox before the season and forget about unnecessary expenses.Gearbox. One of the most stressed parts in this device and quite often fails. That’s why it definitely needs periodic maintenance.
You will need
Take a syringe and temporarily remove the piston from it. Putting grease in the cylinder. It usually amounts to 5-10 g (more exact amount is written in the instruction manual of the brushcutter).
Don’t be lazy to spend a minute or two after buying a brushcutter and before the mowing season to grease this important assembly. Your tool will be ready for use at any time and will serve you for many years to come.
How to lubricate a brushcutter gearbox. Gearbox oil.
Lubricating the gearbox of your brushcutter is one of the most important parts of maintaining your petrol grass trimmer.
Time and procedure for preventive maintenance of the gearbox.
I recommend preventive maintenance of a new petrol grass trimmer immediately after purchase, with the addition of lubricant to the gearbox. For all the high costs of garden equipment, some manufacturers save up and put grease only to a minimum, for the running-in period.
Often preventive inspection of a gearbox with the addition of liquid grease is carried out once a year at the beginning or end of the season. If the gasoline grass trimmer is not used by you in professional quantities, it is enough.
If the volume of mowing is large, it is necessary to lubricate the gearbox of a brushcutter every 20-50 hours of work. If the operation mode of garden equipment is hard, for example, mowing a large field at a time, and the mower does not have time to cool down, or cheap lubricants are used, the lubricant must be checked and added every 20 hours of work.
Indirect evidence that it is necessary to lubricate the gearbox can be overheating or increased noise of the node. In these cases, if the inspection reveals that the volume of lubricant in the node is sufficient, I recommend its replacement in its entirety, it is desirable to choose another manufacturer of auto chemical. I also recommend the complete replacement of the lubricant, disassembling and flushing the unit when buying a second-hand gasoline grass trimmer.
Gear Lubricant for Gasoline Grass Trimmer.
According to the instructions, you should use a special transmission fluid to lubricate the bevel gear. As a rule, manufacturers of garden equipment produce and recommend chemicals of their brand, as the most adapted to their devices.
At the same time, in order to reduce the cost of operation of garden equipment and increase the attractiveness of the brand of automotive chemicals, the lubricant for garden equipment is usually made multifunctional. It is intended not only for the lubrication of gearboxes of gasoline trimmers, but also for the treatment of hoses, gears and reduction gears of any garden equipment and mechanical devices, operating under high loads.
An example is a special high-quality grease from Oleo-Mac, created on the basis of molybdenum bisulphate. It is often found in auto care catalogs in online stores, so use the following filter when searching: Purpose. Gardening Equipment. Or Liqui Moly LM 47 MoS2. CV joint grease with special antifriction additive. molybdenum disulfide, designed for high-speed and loaded bearings. Such grease for a gearbox is sold in convenient tubes for use and subsequent storage.
Even if the specialized gearbox grease is almost completely depleted during operation, additives still create an effective lubricating protective film on the surface of the gears.
It should be noted that many brushcutter owners in the expanses of the former CIS countries for the lubrication of the gearboxes use the usual Lithium-based Lithol-24 or grease for Cables. It is convenient to fill the reducer with a 5-cubic-meter medical syringe. Many motorists choose a linchpin from used car crosspieces instead of a side screw and screw it in. This refinement allows the addition of Lithol without disassembling the assembly using a grease gun.
The undoubted advantage of using Lithium-based grease and Lithium-based grease in the transmission of your brushcutter is that it reduces operating costs. But there are nuances that break the spears on Internet space gardening forums. My thoughts on what can and cannot be lubricated with lithium-based grease can be found in the article “Lithol as a brushcutter gear lubricant”.
How to lubricate the gearbox of a brushcutter or petrol grass trimmer.
For safety reasons, in order to avoid starting the machine accidentally, all maintenance work on the brushcutter is always carried out with the plug / tee cap removed. Do not turn the trimmer upside down to avoid gasoline leaks.
Remove the side screw on the brushcutter gearbox. Depending on the machine manufacturer, there may be a hexagon socket head screw instead of the hexagon socket head screw. Thread is quite normal, unscrewing in an anti-clockwise direction. Don’t lose the sealing washer.
If you can’t see grease on the inside end of the screw, you need to add 3 to 4 grams. Turn the gears by hand, changing the direction of rotation, so that the grease spreads to the gears. Repeat the operation a few times. On average, a gearbox contains approx. 5 to 10 g. The assembly must be completely filled with grease, taking into account the installation of the screw. Then refit the screw by tightening it securely.
As you can see, it does not take much time or special skills to lubricate the gearbox on a brushcutter. Usually it takes longer to assemble than to do all the preventive work. Have a safe gardening technique. Share your petrol trimmer care practices in the Комментарии и мнения владельцев.
Main gearbox malfunctions and troubleshooting
Various faults occur with the gearbox of an electric or gasoline grass trimmer. The most frequently occurring problems are summarized in the table below. Here you can also find the causes and solutions.
|Gear unit malfunctions||Possible Causes of Breakdown||How to fix it|
|Gear unit excessively hot||use of unsuitable (low-quality) grease or its absence||Change or add lubricant|
|gears are new and not chafed||Run in for a short time without hard work and stop at regular intervals to allow the mechanism to cool down|
|shaft seizure during rotation, backlash and knocking||Rupture or substantial wear of any of the bearings||replace the defective bearing with a new one|
|Transmission unit comes off the brushcutter bar or wobbles||The housing is damaged||the part must be replaced|
|in some cases of minor damage use a metal band to tighten the broken place|
|not fixed on the pipe||Wear at the joints||it is possible to rewind insulation tape on the fixing points or to change the rod|
|the output shaft with the blade does not turn or stops when the load increases||Tooth wear on gears or one of the gears||the interacting pair of worn out parts needs to be replaced|
Bearings are destroyed by the use of unsuitable or missing lubricants. They are also damaged by hard working conditions on the brushcutter and by foreign particles in the material (e.g., broken metal teeth in the mechanical gears) because the integrity of the dust shields is compromised.
To remove a bearing, the gearbox must be disassembled and a special puller must be used. If it is not there, you can try to do it with a hammer with an insertion tool. In this case, work carefully so as not to damage the seating. It is not advisable to use preheating to remove the bearing. This is due to the fact that the metal can lose the desired performance characteristics.
If the knife stops rotating under load or stands still at all, it is accompanied by an uncharacteristic sound.
Most gearbox failures can be easily fixed with your own hands. Parts to be replaced are to be bought as “genuine” replacement parts for the model of brushcutter in use.
The rod and actuator of the working body
The rod has two very important functions: the first is that it forms a rigid framework for the entire structure, and the second is that inside the hollow metal rod there is a shaft that connects the working body to the motor. By the appearance of the rod you can determine the class of the tool, if the rod is curved. it is convenient for work, but in this case the drive is a flexible shaft, which can not transmit a lot of torque. If the rod is straight, a rigid metal rod runs inside, much more reliable and it can transmit more torque. That’s why professional tools always have straight shafts.
Lubrication of gears should be performed regularly in accordance with the recommendations set forth in the operating instructions of the model used. It should also be done if:
In addition to the gearbox, the grass trimmer shaft must also be lubricated regularly. It is a standard of proper maintenance.
When the grass trimmer is constantly used, its transmission mechanism is stressed by grass clippings, dirt or due to changes in torque. You should choose high-quality lubricants to extend the life of your gears.
Types of grease used
When choosing a lubricant, the following factors should be considered:
Well-known manufacturers, such as STIHL, Husqvarna and others also produce lubricants for trimmers. Such products not only reduce wear and tear, but also protect the gear metal from corrosion. That is why it is better to use their own lubricants for brushcutter brands.
If the compound used for lubrication has good adhesion, it hardly ever squeezes out of the gearbox through the gaps.
Different models have different grease consumption. This is determined to a large extent by the intensity of use of the brushcutter and the heat of the gearing. A lubricant is considered sufficient if the temperature of the gearbox during operation does not exceed 40° C.
The consistency of grass trimmer lubricants can be:
In terms of composition, the following types of grease are in demand:
- Graphite, which significantly reduces friction, resulting in better gear rotation;
- Lithium, which is also an excellent anti-corrosion composition, saturated with additives that increase the wear resistance of metal without harmful substances;
- Multi-purpose, high-purity mineral oils and performance-enhancing components.
Examples of suitable lubricants are: Champion EP-0, Gear Grease OREGON, Oleo-Mas, Azmol 158, Lithol.24. You should also pay attention to the manufacturers’ advice on this matter and use the materials they offer. You can buy them at specialized retail outlets.
Champion EP-0 Universal Grease 120 g
Algorithm of independent lubrication of the gearbox
To conduct the lubrication of the transmission mechanism does not need preliminary disassembly. The device already has a special hole for these purposes (it is shown in the photo below). In addition to the gears during the lubrication need to pay attention to these elements of the mechanism:
Use a screw to fill with oil or solid lubricant. In this case perform actions in the following sequence:
- Clean the gear housing from dirt and grass clings, especially carefully the area around the plug, so that the debris does not get into the mechanism;
- Using the appropriate tool (often it comes with the 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 back in.
When you do this, turn the blade so that the grease evenly spreads on the teeth of the driving gears.
If for any reason the gearbox has to be disassembled, the old lubricant must be completely removed from all surfaces of the gears and housing, the shaft, and only then the new one should be used. It is convenient to lubricate the disassembled mechanism with solid lubricants.
You can see the whole process in the following video:
You should lubricate the transmission unit at least once a year, but every 20 hours of heavy use should be enough. If there are any early signs of malfunctions, you should re-lubricate as soon as possible.
Rod and implement drive
The rod has two very important functions: first. it forms a rigid frame of the entire structure, second. inside the hollow metal rod there is a shaft that connects the working body with the motor. You can tell the class of the tool by the appearance of the boom. If the boom is curved, it is convenient for work, but in this case the drive is a flexible shaft, which cannot transmit much torque. If the boom is straight, a rigid metal rod runs inside, it is much more reliable and can transmit more torque. That is why professional tools always have straight rods.
Lubricate gears at regular intervals as recommended in the instruction manual of the model in use. You should also do it if:
In addition to the gearbox, the grass trimmer shaft must also be regularly lubricated. This is the norm for proper maintenance of the machine.
When the grass trimmer is constantly used, its transmission mechanism is stressed by grass clinging to the blades, dirt or due to changes in torque. Lubricant should be chosen of good quality to prolong the service life of the gearbox.
Types of grease used
When selecting a lubricant, you need to consider such factors:
Well-known manufacturers, such as STIHL, Husqvarna and others, in addition to trimmers, also produce lubricants for them. These products not only reduce wear and tear, but also protect the gear metal from corrosion. Therefore, for brushcutters from these brands, it is better to use their same lubricant products.
If the grease used for lubrication has good adhesion, it hardly ever squeezes out of the gearbox through the gaps.
Grease consumption varies from model to model. This is determined to a large extent by how intensively you use your brushcutter and how hot the gears get. It is believed that the lubricant is sufficient if the temperature of the gearbox during operation does not exceed 40 ° C.
According to consistency, lubricants for grass trimmer can be:
In terms of composition, the following types of grease are in demand:
- Graphite, which greatly reduces friction, thereby improving the rotation of the gears;
- Lithium, which is also an excellent anti-corrosion composition, saturated with additives that increase the wear resistance of metal without harmful substances;
- Universal, containing mineral oils with a high degree of purification and performance enhancing components.
Examples of suitable greases are: Champion EP-0, Gear Grease OREGON, Oleo-Mas, Azmol 158, Lithol.24. You should also pay attention to the manufacturer’s advice on this and use the lubricant specified by the manufacturer. You can buy them at specialized retail outlets.
Champion EP-0 Universal Lubricant 120 gr
Algorithm of self-lubrication of a gearbox
For lubrication of the gear mechanism there is no need to disassemble it beforehand. The unit already has a hole for this purpose (it is shown in the photo below). In addition to the gears, during the lubrication it is necessary to pay attention to such elements of the mechanism:
Oil or solid grease should be introduced via a screwdriver. In doing so, carry out the following actions in the following sequence:
- clean the gear housing from dirt and adhered grass, especially carefully the area around the plug, so that the debris does not get inside the mechanism;
- unscrew the plug using the proper tool (often the tool is delivered with the trimmer);
- 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 in place.
When applying grease it is necessary to rotate the knife so that it is evenly distributed over the teeth of the moving gears.
If for any reason the reducer must be disassembled, the old lubricant must be completely removed from all surfaces of the gears and housing, the shaft, and only then use the new. It is convenient to lubricate the disassembled mechanism with solid compositions.
The entire process of lubricating the gearbox is demonstrated in the video clip:
You need to lubricate the transmission unit at least once a year, but it is recommended to do it every 20 hours of heavy trimmer use. If there are the first signs of failure of the mechanism, you need to apply lubricant as soon as possible.
Disassembling the gearbox to check it and replace the grease and wear particles
To do this disconnect the cowl and the shaft with the shaft inside from the gearbox. Remove the actuator from the spindle and wash the pinion for easier disassembly. Unscrew the cap screw, but it can be left in place. к. it does not have any load bearing capacity.
Then pull pinion assembly out of the housing. To do this, use a special puller to remove the locking ring from the ring slot, which holds the pinion assembly in position in the housing.
Since the bearings are mounted with the outer ring interference in their seats, it is not easy to remove them. To make this task easier, heat up the gear case in the bearing area with a construction hair dryer.
As the case metal heats up, it will expand and the interference will disappear. Now you can easily remove the helical drive pinion block with two identical paired bearings from the housing.
Proceed to remove the idler block with spindle from the gear housing. Here first remove the centering bush with a pair of pliers with narrow jaws, then the stuffing box by prying with a screwdriver or other suitable tool.
As in the first case, pull out the retaining part by squeezing with a circlip puller, using the holes in the lock.
Warm up the gear housing in the pinion bearing area with a hairdryer and pull it out after a while by slightly pulling on the spindle.
Once you are satisfied that the gears, bearings, retaining rings, and oil seal are in order, you can proceed to completely flush and relubricate the gearbox. If damaged parts are found, they must be replaced with similar ones. Pay attention to how much wear products are on the sides of the head body.
Grass trimmer gear lubricant. peculiarities of selection?
For stable operation of the gearbox without its jamming and regular breakdowns this mechanism should be regularly lubricated. As indicated in the manual of the household trimmer for grass, for this purpose is suitable quality grease gear oil
In some cases, well-known manufacturers of garden equipment produce their own oils, which are suitable for lubricating the gearboxes of branded trimmers. In order to make these substances as attractive to customers as possible, they are made multifunctional. In other words, these oils are suitable not only for lubricating the gears of household trimmers, but also for regular treatment of gears, fuel and oil hoses, as well as maintenance of other parts and assembly mechanisms, regardless of the type and purpose of garden equipment.
An example of a multi-purpose grease is Oleo-Mac brushcutter gear lubricant that contains molybdenum bisulfate. Another example is Liqui Moly LM 47 MoS2. It is most often used for maintenance of CV joints, but due to its molybdenum disulfide content, it can be used for the lubrication of loaded high-speed bearings, including the gears of household trimmers.
An important advantage of multifunctional greases is their high level of required additives. Even after complete depletion of the lubricant, they continue to keep on the surface of the moving gears a thin and very strong oily film that protects parts from heat and increased wear.
Some trimmer owners use Lithium-based compounds such as Lytol-24 or Cylinder Joint Lubricant for gear lubrication. Thanks to their consistency, these formulations are easy to apply to the machine, using a 5cc syringe. These substances have proven to be inexpensive and quite effective lubricants. Their only disadvantage is that these fluids must be replaced more often.
How often should I lubricate the gearbox of my lawnmower??
In most cases, the necessary portion of oil or a complete change of oil is made once a year. before or at the end of the season. This is quite enough if the household grass trimmer is used for mowing about 3-4 days a month.
If a lawn mower is regularly used for mowing young grass on large areas, it is necessary to lubricate the gearbox at least once every 30 to 45 hours. And if you need a grass trimmer for daily mowing of not only young grass, but also old high woody weeds, then change the grease in its gearbox required at least once every 20 motor-hours.
Factors such as increased noise and overheating will tell you that the lawnmower gear needs lubrication. In this case, it is necessary to remove the mechanism, disassemble it and check the internal parts. If during inspection it was found that there was enough grease in the assembly, then it should be replaced in its entirety. If there is too little oil, the operator will need to add the missing amount of lubricant.
What lubricant should be used for the grass trimmer gearbox?
During operation, the mechanical part of the grass trimmer is loaded with contact forces on the teeth, resistance reactions from the adhered grass (sometimes. with dirt), dynamic, shock loads due to constantly changing torque. Grass trimmer gear lubricant 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 is not unreasonably focused on lubricants of its own making (we can talk about cheap Chinese products later). This includes manufacturers such as Husqvarna, STIHL, Huter, Makita and others. The exception is domestic grass trimmers: for example, Kalibr does not indicate the brand of lubricant in the user manual at all.
- Lubricant viscosity. As is known, all lubricating compositions are divided into three groups. high-viscosity (colloidal systems containing various additives), plastic compounds for universal use and solid lubricants, which soften during operation.
- Good adhesion to gearbox component surfaces, which prevents grease from squeezing out into gaps or out of the unit.
- Intensity of lubricant consumption by the gearbox. Here you have to rely on your own experience and recommendations of experts, because some trimmer manufacturers, trusting in the existence of their own service centers, do not give clear recommendations on the period of operation of the gear between two lubrications.
Lubricant consumption also depends on the temperature at which the lubricant retains its lubricating power. When the gearbox is heated up to 40°C, the operating conditions are considered satisfactory and the lubricant is sufficient.
It is believed that there is no universal grease for grass trimmer gears, but this is not entirely true. In fact, a suitable lubricant would be one that contains the following components:
- Antiwear additives that do not contain toxic lead;
- Solid lubricants in the presence of graphite or molybdenum disulfide (the latter is preferred since it fully retains the lubricating power over a wide range of shaft speeds);
- Mineral only (inorganic!) highly refined oils.
Lithium greases Gear Grease OREGON or Champion EP-0, domestic compositions Oleo-Mas, Lithol fully meet the mentioned requirements.24, or Azmol 158, as well as those recommended by the manufacturer of a particular model of grass trimmer.
How to lubricate the grass trimmer gearbox?
In the upper part of the body, where the gear unit is installed, there is a technological hole, which in the operation of the grass trimmer is plugged with a screw. This screw is unscrewed and 1.5 2 ml of grease is injected into the hole using the spout on the tube. If grease has not been purchased in the same packing, this operation can be performed with an ordinary disposable medical syringe.
The screw is then re-installed. Regardless of the user’s recommendations, you should do this procedure every 10-15 hours of operation of the grass trimmer in working mode. Other reasons to upgrade or replace gearbox grease are to perform minor routine maintenance on your own (e.g., cleaning and washing gear gears before the summer season), to repair the unit, to preserve the grass trimmer for the winter, etc. д.
If a gearbox assembly is disassembled, it is advisable to completely remove the remains of previous grease from the surface of the parts, even if there are no signs of oxidation and contamination. Only then apply new grease. After applying lubricant, it is recommended that you turn the shaft a few times by hand to make sure that the lubricant is evenly distributed throughout the gearbox components.
Boom and implement drive
The drill rod has two very important functions: firstly, it forms a rigid framework for the whole structure, and secondly, there is a shaft inside the hollow metal rod that connects the screed to the motor. By the appearance of the shaft you can determine the tool grade; if it is curved, it is convenient for operation, but in this case the drive is a flexible shaft that cannot transmit a lot of torque. If the rod is straight, a rigid metal rod runs inside, much more reliable and the torque it can transmit more. This is why professional tools always have a straight boom.
Mowers driven by a trimmer with working attachments have a transition cone gearbox. Torque is transmitted through bevel gears. This type of reducers are manufactured of two types: maintained and unmaintained. Name of maintained. the gearbox received from the possibility of adding lubricant to the working cavity to lubricate the pinions. If the gearbox is not serviced, lubrication is added by the factory.The gearbox is sealed by the manufacturer for its entire service life and has a hermetically sealed housing. According to the manufacturer’s designers, these measures increase the service life of the gearbox, because contamination is prevented from entering the interior due to the tightness of the lubrication hole. Gearbox of lawnmower is the most loaded part, transmitting force with the change of direction, so the node is very important proper care and proper lubrication, what kind of grease is needed for the gearbox and repair of cone gearbox with= replaced bearings you can watch the video below.
STIHL lawn mowers are renowned for their
STIHL brushcutters are categorized according to class, engine type and application. They are designed for small area maintenance up to larger areas to clear overgrown weeds, bushes and young trees. And so they are usually divided into different classes. First class includes small amateur machines with engine capacity up to 1.2 liters.с. STIHL ride-on mowers are designed with a curved boom. Eliminates the need for a bevel gear, lowers the cost and reduces maintenance. lawnmower with curved boom are designed to work with cutting tools made of fishing line or polymer blades. They are handy in small garden areas.
The second class includes all-purpose machines with average power up to 2.2 liters.с., designed for field and landscape work. Such designs use a straight rigid shaft, which allows this class to be equipped with steel saw blades for attachments that can be used to cut down bushes and small trees. Conical gearbox with maintenance-free design. What lubricant to use for the gearbox of lawnmowers. Special brand name STIHL or common Russian-made Lithol grease is used.
Engines with 6.3 to 8 liters.c are designed for professional use in forestry or horticulture. Their name is brushcutters. the most powerful brushcutters for working on large areas, cutting down small bushes and trees. Working tool arsenal includes saw blades for removing bushes up to 7 cm in diameter. Branch pruners are equipped with an anti-vibration system, thanks to which the work with such a tool is more comfortable. With powerful drives, the gearbox of a STIHL lawnmower is lubricated with a special brand-name STIHL grease or Russian-made Lithol 24.
Variety of lubricating compounds
Lubricants of different consistencies are used to take care of the nodes of the mechanism:
- Semi-fluid. Such compositions contain a variety of additives and additives.
- Plastic. Are the most universal option. Mostly used for gears and screw gears.
- Solid. Plate slurries in their original state.
Special gearbox compound refers to a semi-fluid system.
STIHL grass trimmer grease is very popular. Special composition and components significantly reduce wear and increase resistance to corrosion. The main properties of this brand of grease are:
Trimmer Gearboxes. Online Parts.Ru
A gearbox is a mechanism whose primary function is to transmit torque from one gear to another. The main task of a reduction gearbox for grass trimmer is to reduce the torque. The product includes one or more gears that rotate at high speed.
Mower gearbox types
Modern lawnmower gears differ from other similar mechanisms in their seating position and diameter. The seating surface can be round, square or star-shaped. The most common sizes in diameter are 24 mm, 25.4 mm and 26 mm. Gearbox mechanisms come in:
- Worm gears.
The following types of grease are used for the gears: liquid and semi-fluid, grease and solid. The main thing is to know how to lubricate the gearbox on your weed trimmer and when to. This is necessary because the product is fitted with gears that are in constant contact. The following applies to the lubrication process:
- Lithium. Contains no hazardous substances and no lead. It is saturated with wear-resistant additives in the form of minerals. This compound is not only an ideal lubricant, but also an excellent corrosion preventer.
- Graphite. Significantly improves the rotation of the gears. It is intended for the treatment of the speed regulator. The best effect is achieved when lubricating lower gears.
- Universal lubricants. Contains mineral oils of improved purity and admixtures of useful components.
Properties of trimmer grease
Special substances are used in the production of the grease that must comply with environmental regulations and standards. After use, they decompose without harming the environment.
Material consistency initially has an elevated viscosity level, but this parameter decreases during operation. This factor ensures full penetration and reliable protection of the working vapors in heating conditions.
Timely and proper maintenance ensures long service and trouble-free operation. Different materials are used for maintenance operations. Renowned manufacturers are developing their own branded care products. These include: grease for trimmers “Husqvarna”, “Champion”, “Makita” and others. The gearbox of the gasoline grass trimmer is lubricated after every 8-10 working hours.
Grass trimmer gear lubricant. peculiarities of choice?
For stable gearbox operation without jamming and regular failures this mechanism must be regularly lubricated. As indicated by the manual for the household trimmer for grass, for this purpose is suitable high-quality consistent gear oil
In some cases, well-known manufacturers of garden equipment produce their own oils, which are suitable for lubricating the gearboxes of branded trimmers. In order to make these substances as attractive to customers as possible, they are made multifunctional. In other words, such oils are suitable not only for lubrication of household trimmer gears, but also for regular treatment of gears, fuel and oil hoses, as well as maintenance of other parts and assemblies, regardless of the type and purpose of garden equipment.
An example of a multipurpose material is Oleo-Mac brushcutter gear lubricant that uses molybdenum bisulfate. Another example is Liqui Moly LM 47 MoS2. It is most frequently used for the maintenance of CV joints, but due to its molybdenum disulfide content it can also be used for the lubrication of loaded high-speed bearings, including the gears of household trimmers.
An important advantage of multifunctional greases is the high content of a large number of necessary additives. even after complete depletion of the lubricant, they continue to keep on the surface of the moving gears a thin and very strong oily film that protects parts from heating and increased wear.
Some trimmer owners use Lithol-24 type compounds for gear lubrication or lithium-based CIA maintenance material. Thanks to their consistency these products are easy to apply in the machine. with a 5-cubic-meter syringe. These substances have proven to be inexpensive and quite effective lubricants. Their only disadvantage is the need for more frequent replacement of these fluids.
Grease for the trimmer gearbox for grass. peculiarities of choice?
For stable operation of the gearbox without its jamming and regular breakdowns, this mechanism should be regularly lubricated. As indicated in the instruction manual for the household trimmer for the grass, for this purpose is suitable high-quality grease transmission oil
In some cases, well-known manufacturers of garden equipment produce their own oils, which are suitable for the lubrication of gearboxes of brand trimmers. In order to make these substances as attractive to customers as possible, they are made multifunctional. In other words, such oils are not only suitable for lubrication of household trimmer gears, but also for regular treatment of gears, fuel and oil hoses, and maintenance of other parts and assemblies, regardless of the type and purpose of the gardening equipment.
As an example of a multi-purpose material, the gear lubricant for Oleo-Mac brushcutters with molybdenum bisulfate. Another example is the compound Liqui Moly LM 47 MoS2. It is most often used for maintenance of CV joints, but due to its molybdenum disulfide content it can also be used for the lubrication of loaded high-speed bearings, including the gears of household trimmers.
An important advantage of multipurpose greases is that they contain a large number of necessary additives. Even after complete depletion of the lubricant, they continue to retain a thin and very strong oily film on the surface of the moving gears, which protects the parts from heat and increased wear.
Some trimmer owners use for the lubrication of gearboxes compounds such as Lithol-24 or lithium-based materials for maintenance of CV joints. Thanks to their consistency, these formulations are easy to add to the machine with a 5cc syringe. These substances have proven to be inexpensive and quite effective lubricants. Their only disadvantage is the need for more frequent replacement of these fluids.
How to choose the right grease
During the operation, the knots of the mechanism are loaded with the contact forces on the teeth, the reactions of resistance when debris enters, as well as dynamic and shock loads. Depending on the characteristics of the load, it is necessary to choose what to lubricate the gearbox of grass trimmer.
When selecting, such factors should be taken into account:
- manufacturer’s brand;
- lubricant viscosity (the selection of this parameter depends on the shaft torque);
- adhesion to the surface of the parts of the unit;
- intensity of grease consumption (ambient temperature, type and volume of work must be taken into account).
In the absence of the necessary lubricant, you can use a universal. The latter should contain some components:
- Antiwear additives (no toxic lead)
- mineral oils with a high degree of purity (inorganic);
- solid lubricants with graphite or molybdenum disulfide.
Lubricant User Reviews
Specialists recommend using only original materials, the characteristics of which meet the requirements of the manufacturer. If there are none, you should clarify what to lubricate the gearbox of grass trimmer. Experienced users do not recommend using solidol, as this material is not suitable for the temperature and speed characteristics of the node, as well as the consistency. Also, the above material does not have antiwear properties.
The working temperature range of solidol. from minus 40 to 65 degrees, but even at such parameters in the process of heating the density of the material increases, and the grease itself becomes coarse. If there is an emergency need to treat the tool, you can use “Lithol-24”.
Gasoline grass trimmer service
Most brushcutters and trimmers have a flexible shaft in their design. Have its condition checked at least once every 50 operating hours. To perform this operation, remove the boom tip, pull out the shaft and inspect it, then lubricate.
For the care of the shaft is suitable for inexpensive materials, it is more difficult to choose them for the grass trimmer gear. What to lubricate this mechanism. it depends on the tool manufacturer. It is best to use materials that contain molybdenum disulfide. The latter provides smoothing and filling cracks in the working surface, so it is especially appreciated among users.
Important: Using lots of grease and a high density of oil leads to overheating of the machine, increased friction on the working parts and increased fuel consumption. This is why the choice of materials and preventive maintenance should be made responsibly.