Grass trimmer flexible shaft lubrication. Driven motors

Grass trimmer gear lubricant

Buying any equipment is kind of a lottery, but a lot also depends on the gardener. In caring hands and Chinese samples are long-lasting and do not fail their owners at the wrong time. And if you forget to lubricate the gearbox of a brushcutter in time, don’t clean the filters, use cheap low-quality gasoline, then even the garden equipment from the most famous brands will become a headache.

Lubricating the gearbox of a brushcutter is one of the most important elements of gasoline grass trimmer maintenance, which should be performed directly by the user.

Time and procedure for preventive maintenance of the gearbox

I recommend preventive maintenance of a new gasoline grass trimmer immediately after purchase, with the addition of grease in the gearbox. For all the high cost of garden equipment, some manufacturers save money and put grease only to a minimum, at the time of break-in.

grass, trimmer, flexible, shaft

How often should you lubricate the gearbox of your brushcutter?

It is often necessary to check the transmission once a year, at the start or end of the season, to add some liquid grease. If you don’t use your petrol grass trimmer professionally, that’s enough.

grass, trimmer, flexible, shaft

If you work extensively, you should lubricate the gearbox of your brushcutter every 20 to 50 hours. If the operating conditions are difficult, for example if a large field is mowed at one time and the mower has no time to cool down, or if cheap lubricants are used, then the lubricant needs to be checked and added every 20 hours of operation.

Indirect evidence that it is necessary to lubricate the gearbox may serve as overheating or increased noisiness of the unit.

I also recommend the complete replacement of lubricant with disassembly and cleaning of the unit when buying a second-hand gasoline grass trimmer.

Gear Lubricant for Gasoline Grass Trimmer

Range of greases for garden equipment

According to the instructions for lubricating bevel gears, you should use a special transmission liquid grease. 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 operation of garden equipment and increase the attractiveness of the brand of automotive chemicals, lubrication for garden equipment are usually made multifunctional. It is designed not only for the lubrication of gearboxes of gasoline trimmers, but also for the treatment of hoses, gears and gearboxes of any garden equipment and mechanical devices, operating under high loads.

Such gear lubricant is sold in convenient for use and subsequent storage tubes.

Even if the specialized gear lubricant is almost completely worn out during operation, the additives still create an effective lubricating protective film on the gear surfaces.

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It should be noted that many brushcutter owners on the expanses of the former CIS countries to lubricate the gearboxes using regular Lithium-based Lithol-24 or grease for Cables. The gearbox is easy to fill with a 5cc medical syringe.

An undisputed advantage of using Lithium Fluid and lithium-based grease in the transmission of your brushcutter is that it reduces operating costs. But there are nuances because of which are broken spears on forums of gardeners Internet space. For my thoughts on what you can and can’t use lithium-based grease, check out my article “Lithol as Gear Lubricant for Trimmer Gears”.

How to lubricate the gearbox of brushcutters, gasoline grass trimmer

Side bolt 17 on the gearbox of the petrol grass trimmer

For safety reasons, all maintenance work on the brushcutter must always be carried out with the electric cap / plug removed from the spark plug to avoid accidental starting. Don’t turn the trimmer upside down to avoid petrol leakage.

Remove the side screw on the brushcutter gearbox. Depending on the garden tool manufacturer, there may be a hexagon socket head screw instead of the hexagon socket head screw, most often a wrench size 17. The threads are common, unscrew counterclockwise. Do not lose the sealing washer.

If no grease is visible on the inside face of the screw, you should add 3 to 4 grams. Turn the gearbox by hand, changing the direction of rotation so that the lubricant is distributed to the gears.

Then refit the screw by tightening it securely.

What kind of grease should be used for the grass trimmer gear?

During the operation the mechanical part of the grass trimmer is loaded with contact forces on the tines, resistance reactions from grass clippings (sometimes. with dirt), dynamic, impact 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 consideration:

  • Manufacturer’s brand. Every brand is not unreasonably focused on self-made lubricants (we can talk about cheap Chinese products later). This includes manufacturers such as Husqvarna, STIHL, Huter, Makita, etc. The exception is domestic-made grass trimmers: for example, Kalibr does not specify the brand of lubricant in the user manual at all.
  • Viscosity of grease. As is known, all lubricating compositions are divided into three groups. high-viscosity (colloidal systems containing different additives), plastic compounds for universal use and solid lubricants that soften during operation.
  • Good adhesion to the gearbox mounting surface, so that the lubricant is not pressed out into the gaps or out of the unit.
  • Lubricant consumption rate by the gearbox. (Which is in the boom) for the work of the grass trimmer engine in the heat with how to rotate the shaft in the. Here we have to rely on our own experience and the recommendations of specialists, because some trimmer manufacturers, relying on their own service centers, do not give clear recommendations on the period of operation of the gearbox between two lubrications.

Lubricant consumption also depends on the temperature at which it retains its lubricating power. When the gearbox reaches 40°C it is considered to be in a satisfactory working condition and has enough lubricant.

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How to lubricate the shaft of the mower?

This video shows the most common problem with chain saws and how to deal with it.

Check. Is there grease on the shafts of your chain saws. Most likely it is dry!

It is believed that there is no universal lubricant for the grass trimmer gearbox, but this is not entirely true. In fact, an appropriate lubricant composition would be one that has the following components:

  • Antiwear additives that do not contain toxic lead;
  • Solid greases with the presence of graphite or molybdenum disulfide (the latter is preferable, since the lubricating power is fully retained for a large range of shaft speeds);
  • Only mineral (non-organic!) oil, with a high degree of purity.

Lithium greases Gear Grease OREGON or Champion EP-0, domestic compositions Oleo-Mas, Lithol fully meet the above requirements.24, or Azmol 158, as well as those recommended by the manufacturer of a particular model of grass trimmer.

Lubricate the shafts of lawnmowers Huter GGT-2500S. ☝ And all other chain saws!

Lubricant consumption also depends on the temperature at which it retains its lubricating power. When a gearbox is heated up to 40°C, it is considered to have satisfactory operating conditions, and the lubricant is sufficient.

It is believed that the universal grease for the gear reducer trimmer for grass is not acceptable, but it does not add up. In fact, the suitable lubricating composition will be the one in which the following components:

  • Antiwear additives, which do not contain toxic lead;
  • Solid lubricants with the presence of graphite or molybdenum disulfide (the latter is better, because with all this, the lubricating power is one hundred percent retained for the vast Spectra revolutions of the shaft);
  • Only mineral (inorganic) greases!) Oils with the highest degree of purity.

Lithium greases Gear Grease OREGON or Champion EP-0, Russian compositions Oleo-Mas, Lithol meet the mentioned requirements for all reel.24, or Azmol 158, as well as those recommended by the manufacturer of a particular model of trimmer for grass.

In the upper part of the body, where the gear unit is installed, there is a technological hole, which is plugged with a screw when operating the grass trimmer. Such a screw is unscrewed and 1.5 to 2 ml of grease is injected into the hole using the nozzle on the tube. If you bought grease in a different size, this operation can be accomplished with a standard one-time med syringe.

The screw is then reattached in its original position. This function should be performed every 10-15 hours of operation of the grass trimmer in working mode regardless of user’s advice. Other reasons to renew or, otherwise, to replace the gear lubricant are to carry out small maintenance work yourself (e.g. cleaning and washing gear wheels before the summer), to repair the unit, to preserve the grass trimmer for the winter, etc. д.

Lower gearbox

STIHL lawn trimmers are renowned for their

The second class refers to all-purpose machines with average power up to 2.2 l.с., intended for field and landscape work. In such designs, a straight rigid shaft is used, which allows this class to be equipped with saw blades of steel for attachments that can be used to cut bushes and small trees. Conical gearbox with maintenance-free design. What lubricant to use for the gearbox of a lawnmower. Special, under the brand name STIHL or the usual Russian grease Lithol is used.

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Engines from 6.3 to 8 liters.Designed for professional use in forestry or horticulture. The name is brushcutters. the most powerful brushcutters for working on large areas, cutting down small bushes and trees. In the arsenal of the working tool there are saw blades for removing bushes with a diameter of up to 7 cm. The hedgetrimmers are equipped with an anti-vibration system that makes working with such tools more comfortable. What lubricant to lubricate the gearbox of a lawnmower with a powerful drive system, the lubrication of the gearbox of a STIHL lawnmower is done with a special brand-name STIHL or Russian-made Lithol 24 grease.

How to choose the right grease

During operation, the nodes of the mechanism are loaded with contact forces on the teeth, the resistance reactions of debris, as well as dynamic and shock loads. Depending on the nature of the load, you should choose what to lubricate the grass trimmer gear.

The following factors must be taken into account when selecting lubricants

  • manufacturer’s brand;
  • lubricant viscosity (the selection of this parameter depends on the torque of the shaft)
  • adhesion to the surface of the parts of the assembly;
  • intensity of grease consumption (ambient temperature, type and volume of work must be taken into account).

If a suitable lubricant is not available, a general-purpose lubricant can be used. The latter must contain some components:

  • anti-wear additives (without toxic lead);
  • mineral oils of high purity (inorganic);
  • solid lubricants with graphite or molybdenum disulfide.

Flexible shaft for grass trimmer

The planter is distinguished by its compactness and high speed. It is used for polishing, grinding, drilling and milling. Designed for low-force, high-precision work with a short time of 30-40 minutes. Mostly used by jewelers. The flexible shaft for the engraver expands the number of possible operations, allows you to apply drawings and inscriptions on glass, metal, plastic.

grass, trimmer, flexible, shaft

While working with a flexible shaft loads on the hand are minimal. Open work area. Handy handle allows you to do delicate work, precisely moving the hand with the tool. Professionals use grass trimmers with a foot pedal to adjust speed and a locking brake button on the handle.

User feedback on lubricants

Professionals advise using only original materials that meet the manufacturer’s specifications. If there are none, you should clarify than to lubricate the trimmer gearbox for grass. Experienced users do not recommend using solidol, because this material is not suitable for the temperature and speed characteristics of the node, as well as the consistency. Also the material does not have any anti-wear properties.

The range of working temperatures of the solidol. from minus 40 to 65 degrees, but even at these parameters in the process of heating the density of the material increases, and the grease itself becomes rough. In the event of an emergency, “Lithol-24” may be used on the tool.

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