How to grease an electric weed trimmer with oil. Silicone grease

How to Lubricate an Electric Grass Trimmer with Oil

Today, many stores sell tubes of grease, so people often have the question “What to grease the part?”. To perform the most important procedure, you can take a syringe and try to fill it yourself with the required amount of substance. After a few tries, it is sure to be quick and easy to operate.

Greases of different consistencies are used for machine maintenance:

• Semi-liquid. Such compositions contain a variety of additives and admixtures.
• Plastic. Are the most universal variant. Most often used for gear and screw gears.
• Solid. Plate slurries in the original state.

Special gear compound refers to a semi-liquid system.

Popular is the lubricant for the grass trimmer “STIHL”. Due to the special composition and components, the wear and corrosion resistance is considerably reduced. The main properties of this brand of grease are:

STIHL Lubricant is suitable for brushcutters and trimmers and all transmissions with closed housing.

Design and operation of the trimmer gearbox

Gearbox is a device for transferring rotation to the cutting part from the motor shaft. Its second purpose is to convert the angular velocity of the output shaft into lower or higher revolutions. In the first case, the device is called “demultiplier” and is used on trimmers with powerful engines, in the second. “multiplier” and is installed on low-power tools. Gearbox is always located at the bottom of the boom of gasoline and electric mowers of different brands, whether it is “Champion”, Huter or other brand.

The structure of the reducer is as follows. The main parts are pinion shaft (for transferring motion from the motor) and toothed wheel mounted on the driven shaft (for rotation of the cutting unit). To reduce the force of friction during movement, rolling bearings are placed on the supporting points of the shafts. They are protected by special washers, allowing to keep the grease and to prevent penetration of dirt inside the landing. All parts are enclosed in a duralumin housing with a special technological hole for grease inlet. This is necessary so you don’t have to constantly disassemble the assembly to perform lubrication.

So, depending on the model and brand of equipment (e.g., Sterwins, “Proab”), the gearbox is designed with several gears that are interconnected by teeth to transmit rotation and move at high speed. They get very hot because of the friction.

What can be used for lubrication?

Oil suitable for the lubrication of sewing mechanisms, door locks and similar mechanics. only industrial oil. It has a special composition, which is light and fluid enough so that dust and metal (scraped off the parts during operation) particles do not create sticky and sticky substance. This, in turn, slows down the rotation and reciprocating motion of the moving parts noticeably.

Using other oils is inadmissible.

• Vegetable oil evaporates quickly when parts become warm from friction during long runs. It easily oxidizes and decomposes in the open air and at slightly higher than room temperature.

• Animal fats such as butter, crude oil and the like are also subject to accelerated evaporation. The harder the grease is applied, the faster the oil-sticky deposit will form, and half of its composition will be made up of solid particles. The grease solidifies and makes the car run too slow.
• Motor Oil. If you have chosen the engine oil, choose a composition with lower viscosity for summertime driving. The fact is that the sewing machine is likely to be used at home and warm even in the winter, not in the cold in the gazebo, so “winter” and overly viscous oils do not make sense. But this is an extreme option. It is useful when there is no possibility to go immediately to buy a bottle of “door” oil, but the work is urgently needed to continue it.

Also not recommended for use with grease such as lithol and solidol (except for capron gears), but partially graphite-containing grease is fine.

• Oily waste. It’s not structurally sound. Fatty hydrocarbons used as lubricating oils lose their properties, including their water repellency. They evaporate many times faster than fresh motor oil.

To see how the “third-party” grease will behave, grease the bike chain and try riding a hundred kilometers on such a bike. After a few dozen kilometers, the oily, sticky mud created by the dust and grease will be as viscous as tar. The result is that the pedals will turn with noticeably more force than if the chain and sprockets were lubricated with industrial oil. as if you were riding uphill. Your sewing machine will behave the same way. sewing speed can drop by a factor of two or more.

In principle the purpose of the oil is to prevent wear and rusting. Any oil keeps water (steam, splash) out of the parts. As long as the machine works easily, any composition is acceptable.

But as soon as you notice that the speed of the machine began to fall (for example, by the frequency of knocking of the needle drive mechanism and clicks of the shuttle, “howling” of the engine). wait a while with the work:

Still, in order not to waste time on unnecessary disassembly and lubrication of parts, use a special oil for machines and locks.

The main faults of the gearbox for grass trimmer: how to fix the breakage, how to lubricate, video

For this task, grass trimmers are available. According to the type of energy used for the drive, these devices are divided into gasoline and electric.

For a gasoline or electric mower to last as long as possible, it must be cared for. One of the necessary actions for such care is maintenance of the grass trimmer gearbox.

Lower gearbox

STIHL lawn mowers are well-deservedly popular

The second class refers to all-purpose machines with average power up to 2.2 liters.с., Designed for field and landscape work. In such designs, a straight rigid shaft is used, which allows equipping this class with steel blades 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 common Russian grease Lithol is used.

Engines with 6.3 to 8 liters.Designed for professional use in forestry or horticulture. Named brushcutters, they are the most powerful brushcutters for working on large areas and cutting down small bushes and trees. In the arsenal of the working tool there are saw blades for cutting bushes with a diameter of up to 7 cm. Branch cutters are equipped with an anti-vibration system, thanks to which the work with such a tool becomes more comfortable. What lubricant to use on the gearbox of a lawn mower with a powerful drive system, the gearbox of a STIHL lawn mower is lubricated with a special brand-name STIHL or Russian-made Lithol 24 grease.

Grass trimmer gearbox design

The grass trimmer gearbox is a component that transmits the rotary motion of the engine shaft to the blade or the line. It is located on the lower end of the brushcutter bar. Gearbox is also designed to reduce the engine speed of the grass trimmer.

Depending on the brushcutter model, the gearbox consists of several gears that turn at high speed. This causes them to become hot due to excessive friction. If there is not enough or no lubrication, the process leads to severe overheating and failure of the parts, and, accordingly, the need for complex repairs. To prevent this from happening, it is necessary to lubricate the transmission unit in time. The disassembled gearbox is shown in the photo below.

Gearboxes of modern trimmer models from different manufacturers differ from each other by design and seating size. It can be

The most common diameters of round seats are: 24, 25,5 and 26 mm.

Mowers are equipped with different types of gears:

• tapered;
• worm gears;
• spiroids;
• cylindrical;
• planetary;
• wave gears;
• combined.

Drive shaft and gearbox are heavily loaded components of grass trimmers and are subject to considerable wear and tear. The movement between them is transmitted by the clutch of the teeth of the gears, which are set at different angles to one another. Gear transmission works effectively only if there is no mechanical damage. the gear must not overheat, otherwise it could seize.

features and use on a vehicle

Main functions of bearing grease

The application of the grease has a specific purpose:

• Reducing friction and, consequently, wear of contact surfaces of parts.
• Increases the sliding parameter of the surfaces when deformed due to the occurrence of load.
• Formation of oil film that softens shock loads during operation.
• Uniform distribution of heat generated in friction process.
• Corrosion protection.
• Prevent ingress of dust and other contaminants.

In order that the selected rolling bearing grease complies with the above requirements, the operating conditions of the machine or machine should be taken into consideration.

Lithium greases

The main characteristic of lithium bearing grease is its high water repellency. Lubricants of this group are highly viscous and have one of the widest operating temperature ranges. For this reason, lithium grease is considered the most versatile and is used in many parts of mechanisms and machines.

How to lubricate a brushcutter gearbox

Magazine bearings and other sliding contacts Lubricating grease is used for pins, bushings, sliding contacts, and plain bearings that experience shock loads, frequent starts and stops, or reverse direction. In such cases, grease provides a thicker lubricating film than oil and protects against wear during boundary lubrication.

The grease used in a plain bearing must be replenished periodically. The frequency required for regeneration depends on the lubricating efficiency of the grease, its thermal stability and the rate at which wear occurs. Bearing temperature has the greatest effect on grease life. As with ball bearings, higher temperatures increase the rate of oil loss from the lubrication structure through oxidation, leakage and evaporation. The grease tends to thicken as it dries and loses its ability to distribute itself in the bearing and replenish boundary films.

This grease is produced as a mixture of synthetic materials and mineral oils. Various organic and inorganic substances are used as a thickener. As the number of revolutions of the bearing increases, the viscosity of the substance decreases. The most popular lithium greases are CYATIM-201, 202, OKB 122-7. CYATIM-203 and VNIINP-242 are widely used in closed bearings.

Figure 1 shows the recommended continuous operating times for applications such as slide bearings in farm and construction machines, depending on the bearing temperature. 4. Another problem with a heavily loaded design. their oscillating nature of operation. A condition that may be more severe than the continuous, unidirectional speeds common to most machines. Damage or failure can be a problem here. Experiments show that the coefficient of friction can suddenly increase after a few cycles with little warning.

At home

The consumable is used to lubricate bicycle chains, locks, door hinges of apartments, garages, and cable drives of brake systems. Due to its density the grease can be mixed with solvents. This gets the product into places that are difficult to reach. After application, the solvent evaporates and the grease remains. The product can be used in the treatment of rubber and plastic parts, as well as surfaces impregnated with paint coatings.

Grass trimmer lubrication places

For smooth operation and durability of the mechanism, careful inspection and maintenance should be performed. Lubrication of moving parts is important. In most cases these are:

• The place from the transition from the engines to the straight shaft;
• the junction of a straight shaft with a flexible one;
• the transition of the shaft with the seating head;
• gearbox.

Popular among users is the multipurpose water-resistant grease “Lithol-24”. Operating temperature range. from.40 to 120 degrees. This lubricant is used in friction units and is effective at high temperatures.

How much grease should be used when changing the gearbox of an angle grinder

If the amount of grease in the bearings is controlled by its leakage from the back side, then a certain amount of grease is stuffed into the gearbox of the angle grinder. Excess grease flows out as you work. A small amount of grease will not ensure good gearbox performance.

You should leave as much grease in the gearbox as is needed to cover the teeth of the gears.

For your orientation, apply just under half the amount of grease in the gearcase cavity.

How to grease a gearbox of a brushcutter or a gasoline grass trimmer

Side bolt at 17 on the gearbox of the gasoline grass trimmer

For safety reasons, in order to avoid accidental starting, all maintenance work on the brushcutter must be carried out with the electric cap / plug removed from the spark plug. Do not turn the weed trimmer upside down to avoid gasoline leakage.

Remove the side screw on the brushcutter gearbox. Depending on the garden tool manufacturer, there may be a hexagonal bolt instead of the hexagonal bolt, usually a wrench size 17. Normal thread, unscrew counterclockwise. Don’t 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 grease is spread on the gears.

Repeat the operation several times. On average, a gearbox will contain approximately 5 to 10 grams. The assembly should be completely filled with grease, taking into account the installation of the screw.

Then replace the screw and tighten it firmly.

As you can see, it doesn’t take much time or special skills to lubricate the gearbox on your brushcutter. It usually takes longer to assemble than it does to do all the preventive maintenance work. Have fun with your gardening equipment. Share your experiences with petrol lawn trimmers in the Комментарии и мнения владельцев.

How to lubricate the shaft?

The video reviews the most common failure of gasoline and how to deal with it WORK 100% TESTED.

Grass trimmer shaft: drive shaft, stiff shaft, lower shaft for lawn mower (brushcutter) and others

If a gearbox assembly is disassembled, it is advisable to remove all traces of previous grease from the surface of the parts, even if there are no signs of oxidation or contamination. And only then apply the latest lubricant. After applying the lubricant, it is recommended that the shaft be turned a couple of times by hand to make sure that the lubricant is distributed moderately over all parts of the gearbox.

When lubricating, increased attention is paid to the following elements:

• To the flywheel: its surface usually actively adheres to grass residue, and the thickening of the grass juice creates additional resistance.
• To the latch of the starter coil that is in daily contact with the slots on the flywheel during flywheel actuation. At the same time there is not so much mechanical wear and tear, and mechanical and chemical corrosion of the connection “flywheel-dog”, as the materials in this pair. different (flywheel. duralumin, and the dog. iron).
• Bearings, if their seals are worn, and through them the remnants of grease are squeezed out. Then the machine begins to vibrate vigorously when loaded. This happens with trimmers made in China, so it is worth in the long term to think about replacing the bearing unit for a higher-quality, for example, from the Swedish company SKF.

Gear lubricant for grass trimmer. What and how to grease?

Sometimes, in the midst of intensive mowing work, your grass trimmer begins to make unpleasant, grinding noises. Find out what the next lawnmower video on how to lubricate a grass trimmer disc shaft will be about. This complains about the lack of lubrication gearbox. the most intensely loaded unit of the device. And these “warnings” can soon be followed by a jammed drive.

Lubricant consumption also depends on the temperature at which the lubricant retains its lubricating power. When heated to 40 ° C gearbox is considered that the conditions of its work. satisfactory, and lubrication is sufficient.

It is believed that a universal lubricant for the gearbox trimmer for grass is unacceptable, but this does not add up. In fact, the appropriate lubricant will be the one in which the following components:

• Antiwear additives that do not contain poisonous lead;
• Solid lubricants with the presence of graphite or molybdenum disulfide (the latter is better, since in this case the lubricating power is one hundred percent retained for the huge RPM spectrum of the shaft);
• Mineral (inorganic) materials only!) oil, with the highest degree of purity.

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

There is a technological hole in the upper part of the housing, where the gear unit is installed, which is plugged with a screw during operation of the grass trimmer. Such a screw is unscrewed and 1.52 ml of grease is injected into the hole with the help of the nozzle on the tube. If you have bought a different kind of grease, you can use an ordinary multi-medical syringe for this operation.

After that you turn the screw back to its original position. This function, regardless of the user’s advice, should be done every 1015 hours of operation of the grass trimmer in working mode. Other reasons to refresh or, otherwise, to replace the gearbox lubricant are: carrying out small routine maintenance jobs by yourself (e.g. cleaning and washing gearwheels before the summer starts), repairing the unit, or renovating the grass trimmer for the winter, etc. д.

Users’ reviews of lubricants

Experts advise to use only original materials that meet the characteristics of the manufacturer. If there are none, you should clarify what to lubricate the gearbox of the grass trimmer. Experienced users do not advise to use solidol, because this material is not suitable for the temperature and speed characteristics of the node, as well as the consistency. Also, the material listed does not have anti-wear 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 urgent need to treat the tool, you can use “Lithol-24”.