Gearbox replacement on brushcutter. Starter and gearbox breakages

Gear lubricant for grass trimmer

Buying any kind of machinery is sort of a lottery, but a lot also depends on the gardener. In caring hands even Chinese models last a long time and do not let their owners down at a bad moment. And if you forget to timely lubricate the gearbox of trimmers, do not clean filters, use cheap low-quality gasoline, then the garden equipment from the most famous brands will become a headache.

Gear lubrication of brushcutters is one of the most important elements of maintenance of gasoline grass trimmer, which should be performed directly by the user.

Time and procedure for preventive maintenance of the gearbox

I recommend the obligatory 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, for the time of running-in.

How often to lubricate the gearbox of a brushcutter

It is common to have a preventive inspection of the transmission with the addition of liquid grease once a year at the beginning or end of the season. If you don’t use your petrol grass trimmer as much as a professional trimmer, that’s enough.

For large mowing volumes, it is necessary to lubricate the gearbox of a brushcutter every 20-50 working hours. If the operating conditions of garden equipment are 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 indications that the gearbox needs oiling are overheating and noisy operation.

Also I recommend the complete replacement of lubricant with disassembly and flushing of the unit, if you buy a second-hand gasoline grass trimmer.

Gear lubrication for gasoline grass trimmers

Range of greases for garden equipment

According to the instructions, a special gear lubricant should be used to lubricate bevel gears. As a rule, manufacturers of garden equipment produce and recommend their brand of chemicals 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, lubricants for garden equipment are usually made multifunctional. It is designed not only to lubricate the gears of gasoline trimmers, but also for the treatment of hoses, gears and gearboxes of any garden equipment and mechanical devices operating under heavy loads.

Such gear lubricant is sold in easy-to-use and easy-to-store tubes.

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

It should be noted that many brushcutter owners on the expanses of the former CIS countries use the usual Lithium-based Lithium-based Lithol-24 or grease for Cables for the gearbox lubrication. It’s easy to fill the reducer with a 5-cube medical syringe.

The undoubted advantage of using Lithium-based grease and Lithium-based grease to fill the gear of brushcutter is cheaper operation. But there are nuances, which break the spears on the forums of gardeners Internet space. My thoughts on what you can lubricate with lithium-based grease and what not, read the article “Lithol as a brushcutter gear lubricant”.

How to grease a gearbox of brushcutter and gasoline grass trimmer

Side bolt at 17 on the gearbox of gasoline grass trimmer

For safety reasons, in order to avoid accidental starting, all maintenance work on brushcutters is always carried out with the electric cap / plug from the plug. Do not flip your petrol grass trimmer to avoid petrol leakage.

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Remove the side screw on the brushcutter gearbox. Depending on the gardening tool manufacturer, there may be a hexagonal bolt instead of a hexagonal screw, most often a wrench for 17. Threads are unscrewed counterclockwise. Do not lose the sealing washer.

If no grease is visible on the inside face of the screw, add 3 to 4 grams. Turn the transmission by hand, reversing the direction of rotation to distribute the lubricant over the gears.

Then replace the screw, making sure it is fully tightened.

Finding the Fault

If the grass trimmer engine does not start or stops immediately after start, if the gearbox overheats or if you can hear extraneous noises and clearly feel vibration during the operation of the device, it is important to perform a visual inspection and identify a non-working unit

To optimize preparatory measures before the repair, a simple diagnosis should be carried out and step by step checked:

  • The presence of fuel in the tank and grease in the main components;
  • serviceability of the spark plug and its performance;
  • Cleanliness of the brushcutter’s fuel and air filters;
  • clogging of the outlet channel and the breather of the device;
  • The quality of the fuel and lubricants used.

To determine if the spark plug is functional, you must determine if the spark plug works by testing the appearance of the spark when it comes into contact with the housing of the functional device.

The spark plug itself can be replaced with a new one, pre-drying the spark plug duct, if necessary, the old element is also dried, cleaned with special devices and returned to its place.

Grass trimmer gear lubrication

Lubrication of gears should be performed regularly in accordance with the recommendations contained in the operating instructions of the model in use. This should also be done if:

In addition to the gearbox, you should also regularly lubricate the shaft of the grass trimmer. This is the norm for proper machine maintenance.

Constant use of the grass trimmer causes its gear train to experience stress from grass clippings, dirt, or torque variations. How to disassemble the gearbox from a brushcutter on a grass trimmer mowing head fassen.net-video. Lubricant must be of good quality in order to prolong the service life of the gearbox.

How to Disassemble the Grass Trimmer Upper Gear Gearbox

Repair and lubrication of trimmer gearboxIn frequent, heavy use of brushcutters, the gearbox can start to get hot or make unusual noises for its normal operation, for example, grinding. This is an indication that the mechanism needs to be lubricated. grass trimmers and chain saw trimmer gearbox for grass trimmer STIHL grass trimmer video how to disassemble the gear. How to correctly lubricate a grass trimmer gearbox? How to Disassemble the Upper Gearbox. If you do not do it in a hurry, then there will be more severe constraints (for example, quickly worn gears and it is useful to change them), right up to jamming. Other breakdowns also appear with the gear train. Repair and lubrication of the gearbox can be done without the help of others. you just need to learn the specifics of these works and have some tools available.

Grass trimmer upper gear disassembly and repair

Disassembly and repair of top gearbox of brushcutter (grass trimmer).

Grass trimmer upper and lower gearbox

about trimmer gearboxes, bottom gearbox and top gearbox (bell), how to understand how they differ.

Rules for Selecting Grease

Many garden tool companies, such as STIHL and Husqvarna, self-lubricate their products. In this case, it is recommended to use just such products. they best reduce the wear and tear of the equipment. If the original lubricant is not available for the grass trimmer, it is worth considering several factors when choosing a composition:

  • the product quality of the brand that produces the lubricant;
  • viscosity of the composition. this parameter is influenced by the torque of the shaft;
  • Adhesion to the surface of the components of the node;
  • The consumption of the lubricating coating. you need to take into account the air temperature, the type and amount of work performed.
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Greases can be liquid or semi-liquid in consistency, with various additives and additives, as well as plastic or solid. Plastic lubricants are the most common, while solid lubricants represent their initial state. The most popular by composition are considered:

  • graphite grease, which reduces friction and improves the movement of the gears;
  • lithium compounds with high anti-corrosive properties and additives to reduce metal wear;
  • all-purpose substances containing mineral oils and additives, which increase the performance properties of the gearbox.

The most common lubricants include: Lithol-24, Champion EP-0, Azmol 158, as well as the composition produced by “STIHL”.

Lawn mower malfunctions and troubleshooting

Any type of chain saw has a hollow shaft, which is placed connecting cable between the motor shaft and the bottom gear, which transmits the rotation to the tool with cutting equipment. In the higher part is placed the carburetor and engine, below. the gearbox and the working tool, closed by the hood. There is a transverse handle in the middle section where the control buttons are located. To relieve the hands, there is an unloading belt holding the boom by the operator’s torso.

In the process of selecting a lawnmower, it is better to have a machine with a two-stroke engine than a four-stroke. The two-stroke motor is more maneuverable and easier to repair. With a four-stroke node lower vibration level.

gearbox, replacement, brushcutter, starter

Their it follows, the lawnmower repair is to eliminate defects;

  • the engine does not start;
  • the cutting mechanism does not develop;
  • engine stalls;
  • the gearbox heats up;
  • a knock is heard, a powerful vibration of the boom is heard.

While troubleshooting, it is necessary to carry out diagnosis, to find a non-working node.

It is fundamental to know the lubrication points of the tool. Continuous care, cleaning the machine after work will prolong its life. Before you start, you need to tighten the mounting screws, prepare the fuel and fill the tank.

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gearbox, replacement, brushcutter, starter

How to disassemble and reassemble the grass trimmer

For independent disassembly of the grass trimmer prepare a set of tools:

Dismantle each unit individually for diagnosis.

Disassembly of the electric trimmer

An electric trimmer for grass consists of the basic electro-block and a boom. Let’s consider how to make disassembly for repair of electrical part:

  • Lay the brushcutter on a flat surface.
  • Unscrew the fixing screws of the body of the grass trimmer on one side.
  • After removing the cover you can perform diagnostics, repair or replacement of the electric motor, drive and bearings, brush unit, start button and other elements.
  • Assemble the eletrical grass trimmer should be sequentially: first install the motor, tightening the mounting screws; connect the electrical circuit; carefully place the wires in the body in the appropriate recesses; close the top cover and tighten the screws.

Disassembly of gasoline trimmer (shown in the video instructions grass trimmer Gruntek BS 52X) for the repair of the engine performs as follows:

  • First remove the gasoline motor from the boom.
  • Disconnect the starter by unscrewing the fixing bolts.
  • Remove the protective cover of the tank and the tank itself.
  • Unscrew the spark plug and remove the outer motor cover.
  • Remove the carburetor, choke, ignition coil and muffler from the engine.
  • In order to diagnose and replace faulty motor parts, you must first disconnect the clutch assembly. To do this, fix the combustion chamber, and use a ring spanner to unscrew the clutch mounting bolts.
  • Reassemble the brushcutter after the repair, carrying out the same operations in reverse order.

What trimmer do you use on a country site, and whether you carry out repair of the tool independently?

Dismantling and repairing the upper gearbox of a grass trimmer trimmer

If there are questions on repair of the top gearbox of brushcutter. Ask, I will answer.

there is a lawnmower “Tatra”, it has no retaining ring through the holes in the clutch cup. Only on the bearing on the shaft side. How to remove the cup (it has slits)

at idle rpm spins the coil does not stop. answer what can be Satol.tol@rambler.Go to

Thanks for the video, I’m going to rebuild my STIHL 400 this winter, so that’s very helpful. informative. IMHO: the bearing is probably better to settle on the inner ring.

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Hello! The problem with the upper gearbox is that it rotates on the rod along with the motor. what to do? I have a gasoline grass trimmer PIT. Thank you

Thanks for the video. Very helpful when replacing the plate.

Good day. Faced with this problem: I have a lawn mower Sterwins PBC43R 42.7 CC. The boom diameter is 28mm. Burned only 5 liters of gasoline (2 months of use on weekends). Damage appeared, there are traces of oil on the clutch damper rubber art. 202362 and noticeable backlash in this assembly: vertical and around the axis of rotation (rod relative to the motor). Please advise: What is the approximate lifespan of these rubber bands?? Is there a rubber damper for D=28mm and how to buy it (nowhere to be found) or is it universal with 26mm? How much more practical and reliable is the upper reducer design that uses a damper art. 202088? Is there an advantage to the 28 mm diameter other than strength, as I understand the parts are much harder to find, I am thinking of switching to 26 mm? Thank you so much in advance!

Hi Hi, I have a question for you, can I replace the upper gearbox with a 7 pinion gearbox?

Pressing the bearing by hitting the outer ring is barbaric and killing the bearing

You have to unscrew the shaft from both the upper and lower gearbox?

Don’t get the bearings clogged like that, folks.

By the way, all the videos show that you need to lubricate the lower gearbox, no one explains how and what to lubricate the lower gearbox and how often it should be done?

Please tell me the gear ratio of this reducer, I am Sasha, thanks

How to replace the bushings inside the rod, I bought a 9 shl shaft and it is thicker than a 7 shl shaft

don’t ever knock down a bell like that, folks! You’ll bend it. You have to put it on the stop on the inside.

Hello, do you know if the bearing you replaced is lubricated??Thank you.

You may have to replace the rod side to side or rubber.

Hello. Do you know what can be done with a torn thread on the binzo grasshopper, on the cylinder where the carburetor is attached.

The bearing (ANY) on the shaft is seated only by the INNER ring

gearbox, replacement, brushcutter, starter

Good evening, the boom is wobbling from side to side in the upper gearbox what do you need to change the bearing or rubber?thanks

Dude specially by the outer rim of the bearing scores, so that he soon brought back this brushcutter.

have a nice day. advise grass trimmer throttle lever in position “choke” It starts, but when I turn it on, it’s not working “Start” engine stalls.

after 5 minutes, the trimmer is overheating the top gear, what’s the reason?

Tell me why my upper gearbox is getting too hot ?

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Do you know if the damper has a clamp inside the top gear (rod) and how to remove the clamp and rubber? No use with my hands, it will break in a vise, today I broke this clamp as a tube when I twisted the rod clamp, now I’m scratching my head how to disassemble and make a new one from a tube, because the second time buying a complete set of gearboxes is expensive.

New lawnmower procraft, when reassembling it does not clamp the top gear on the boom, tightened the bolt all the way, but it only holds on the fixing (anti-rotation) bolt.What can be the way out of this situation?

Tell me if the top gear is heating and the rod is loose what could be the reason?The braid is 1 year old and has not been disassembled. thanks in advance.

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