What’s the grease in a grass trimmer gearbox. Removing and lubricating the grass trimmer’s top shaft
How and With What to Grease a Grass Trimmer Gear? nuances in selecting and applying compound
Gearbox of brushcutters Buying any machine 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 let their owners down at the wrong time. And if you forget to lubricate brush cutter gear in time, 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 carrying out preventive maintenance of the gearbox
I recommend the obligatory preventive maintenance of the new gasoline grass trimmer immediately after purchase, with the addition of grease in the gearbox. For all the high costs of garden equipment, some manufacturers cut corners and put only minimal amounts of grease during the break-in period.
How often should the gearbox of a brushcutter be lubricated?
Often preventive inspection of the transmission with the addition of liquid grease is carried out once a year at the beginning or end of the season. If you don’t use your petrol grass trimmer for professional cutting, it is enough.
For high mowing volumes, it is necessary to lubricate the gearbox of a brushcutter every 20-50 hours of work. If the operating conditions are hard, for example if you mow a large field at a time and the lawn trimmer has no time to cool down, or if you use cheap lubricants, then the lubricant must be checked and added every 20 hours of work.
HOW TO GREASE 5 HEAD GEAR, GRASS CUTTER/ BRUSH CUTTER/ WEED EATER/ WEED WACKER/STRING TRIMMER
Indirect evidence that it is necessary to lubricate the gearbox can serve as overheating or increased noisiness of the unit.
Also a complete replacement of lubricant, with disassembly and flushing node, I recommend when buying a second-hand gasoline trimmer for grass.
Gasoline grass trimmer gear lubricant
Variety of greases for garden equipment
According to the lubrication instructions for bevel gears, a special gear lubricant should be used. 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 operating costs 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 to treat the hoses, gears and gearboxes of any garden equipment and mechanical devices operating under high loads.
Such gear lubricant is sold in easy-to-use and easy-to-store tubes.
Even if the specialized gear lubricant is almost completely exhausted during operation, the additives still create an effective lubricating protective film on the surface of the gears.
It should be noted that many brushcutter owners on the territory of former CIS countries for gearbox lubrication use either regular Lithium-based Lithium-based Lithium-24 or Lithium-based grease for Cables. It’s easy to fill the gearbox with a 5cc medical syringe.
The obvious advantage of using Lithium-based grease and Lithium-based lithium-based grease in the transmission on your brushcutter is that it saves on operating costs. But there are nuances, because of which the spears are broken on forums of gardeners Internet space. For my thoughts on what can and cannot be lubricated with lithium-based grease, see “Lithol as Gear Lubricant for Trimmer Gears”.
How to lubricate the gearbox of a brushcutter, gasoline grass trimmer
Side bolt for 17 on the gearbox of gasoline grass trimmer
To keep your brushcutter safe and to avoid accidental starting, all maintenance work on it is carried out with the spark plug boot/plug removed. Don’t turn your grass trimmer upside down to avoid gasoline leakage.
Remove the side screw on the brushcutter transmission. Depending on the respective manufacturer of your garden tool, the hexagonal bolt can be replaced with a wrench, usually a 17 mm one. The thread is common, unscrew counterclockwise. Do not lose the sealing washer.
If there is no grease visible on the inside end of the screw, you need to add 3 to 4 grams. Rotate the transmission by hand, reversing the direction of rotation to distribute the lubricant over the gears.
Then put the screw in place, tighten it firmly.
First we need to disassemble the boom. With a conventional chain saw, this is done by simply disconnecting it from the upper and lower gearbox.
If the grasshopper has a collapsible two-piece boom, it’s even easier. It is only necessary to remove the coupling sleeve in the center and separate the halves.
If the weed whacker has been in operation before, you may notice wear from the alignment bushings when inspecting the shaft, or shafts in the case of the collapsible boom. Those are the places that need to be lubricated.
Squeeze a small amount of grease onto a cloth or your fingers and work the shaft without skipping. It is applied in a thin layer, but everywhere. You need to pay special attention to the splines, because they are under the highest load, especially when the grasshopper blade hits rocks and other objects.
Insert the lubricated shaft back into the shaft with a slight twisting motion. That way some of the excess grease stays on the alignment sleeves where it needs to be. Rotation also helps the splines get into their proper seating position on the gears.
If you service a straight mower with a non-disassembled boom, it is simply reattached to the gearboxes. In the case of a two-piece boom, the short shafts are each inserted into their respective halves. After that, the parts of the boom are docked in the center. If their splines are not caught, you can simply twist the lower gear by hand. Next, the docked rod is clamped back together with the coupling.
If the lawnmower is used infrequently, this maintenance of the boom should be done every season. This grease can handle high temperatures, which helps prevent oil leaks when you use the brushcutter for a long time. The same compound can also be used to lubricate gearboxes. It can be pressed into them with a syringe, if the tube does not have a spout. The frequency of gearbox lubrication is higher than the shaft. Manufacturers usually recommend doing this every 5 moto-hours.
You will need
Take a syringe, remove the piston temporarily. Put grease in the cylinder. Usually this amount is 5-10 g (a more exact amount is written in the instruction manual of the brushcutter).
Don’t be lazy to spend a few minutes after buying your brushcutter and before the mowing season to lubricate this important assembly. And your tool will always be ready to work at any time and will serve for many, many years.
Tools and materials required
You will need the following tools and materials for gearbox maintenance:
Hexagonal wrench for opening gear lubrication hole
This wrench is usually supplied with the brushcutter or trimmer.
The next tool you need is a 10 ml syringe. It is the grease gun that allows the grease to get into the gearbox.
It is recommended that you use original grease from the brushcutter manufacturer. As a last resort, you can use any rotary gear lubricant, such as Lithol 24.
Action Open the gearbox
To access the gearbox you need to open it. To do this, unscrew the bolt on the gearbox using the Allen key. The bolt for all brushcutters is in the same place, near the tool.
Action Filling up the syringe with oil
The diameter of the tube does not match the diameter of the gearbox
You’ll need a syringe to get the oil into the gearbox without any problems.
Then fill the syringe with grease from the tube.
After that, the piston is inserted back into the syringe. Syringe is ready to add grease.
Action Filling the Geareducer with Grease
Syringe is inserted into the gear unit bore
First insert a syringe into the gear unit bore.
Squeeze some grease into the Geareducer and turn it about a quarter turn
Then squeeze some grease into the gearbox and turn it about a quarter turn.
Once all of the grease has been squeezed out, the process is complete
Use small portions of grease. After each grease fill, turn the gearbox by 1/3 to 1/4 turn. It is advisable to choose the lubricant quantity for each filling so that the gearbox completes a full rotation during lubrication.
Action Sealing the Geareducer
Once you have filled the gearbox with grease, tighten the screw on the gearbox and tighten it well.
How to lubricate the brushcutter gearbox (easiest way)
How to lubricate the gearbox of grass trimmer or brushcutter: proper maintenance of garden tools | (Photo Video)
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Disassembling gearbox to check it and replace grease and wear particles
To do this disconnect the housing and the shaft with the shaft inside from the gearbox. Remove the actuator from the spindle, and wash the pinion assembly to make it easier to disassemble. Unscrew the plug bolt, but it can be left in place. к. it does not carry any power load.
STIHL grass trimmer bearing replacement
Then remove pinion from housing. To do this, use a special puller to remove the circlip from the ring slot that holds the pinion assembly in the housing in the proper position.
Since the bearings are installed with their outer ring in the seats with an interference fit, it is not easy to remove them. To facilitate this task, let’s heat the gear housing in the area of the bearings with a construction hair dryer.
Once the body metal heats up, it expands and the tension disappears. The helical drive pinion block with two identical, paired bearings can now be easily removed from the housing.
Proceed to remove the idler pinion assembly with spindle from the gear housing. Here first remove the centering sleeve with a pair of pliers with narrow jaws, then the gland by prying it off with a screwdriver or some other suitable tool.
Also, as in the first case, pull out the retaining part by squeezing it with a locking ring puller, using the holes in the lock for this purpose.
We heat the gear housing with a hair dryer in the area of the pinion bearing block and after a while pull it out by pulling lightly on the spindle.
How to Grease a Lawnmower Gear
Buying any machine is sort of a lottery, but a lot also depends on the gardener. In caring hands and Chinese samples serve long and do not let their owners down at the wrong time. 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 your petrol grass trimmer is one of the most important elements of maintenance, which must be done directly by the user.
Time and procedure for gearbox maintenance
I recommend preventive maintenance of your new petrol grass trimmer immediately after purchase by adding oil to the gearbox. For all the high of garden equipment, some manufacturers save money and lubricate only to a minimum, for the time of break-in.
How often to lubricate the gearbox of a brushcutter
Often, preventive inspection of gears with the addition of liquid grease is carried out once a year at the beginning or end of the season. If you do not use the gasoline grass trimmer in professional quantities, it is enough.
If you do a lot of mowing, you should replace the brushcutter’s gearbox every 20 to 50 operating hours. If the operating conditions of the garden equipment are difficult, e.g. 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 must be checked and added every 20 hours of operation.
Indirect indications that the gearbox needs to be lubricated are overheating or noisy parts.
I also recommend the complete replacement of lubricant, disassembly and flushing of the unit, when buying a second hand gasoline grass trimmer.
Gear lubricant for gasoline grass trimmers
Gardening machinery range of grease
According to the manuals, you should use a special gear lubricant 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 operation of garden equipment and increase the attractiveness of the brand of automotive chemicals, lubricants for garden equipment are usually made multifunctional. It is intended not only for the lubrication of gasoline trimmer gears but also for the treatment of hoses, gears and gearboxes of any garden equipment and mechanical devices operating under high loads.
Such gearbox grease 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 in the former CIS countries use regular Lithium-based Lithol-24 or Cane grease for gearboxes. It is convenient to fill the reducer with a 5cc medical syringe.
The obvious advantage of using Lithium-based grease and Lithium-based grease in the transmission of a brushcutter is that it reduces the cost of ownership. But there are nuances, because of which break the spears on the forums of gardeners Internet space. 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 on a brushcutter or petrol grass trimmer
Side bolt 17 on the gearbox of a petrol grass trimmer
For safety reasons, in order to avoid accidental starting, all maintenance work on the brushcutter is always carried out with the electrical cap / plug removed from the plug. Do not turn the grass trimmer upside down to avoid gasoline leakage.
Unscrewing the side screw on the gearbox of a brushcutter. Depending on the manufacturer of the garden tool, instead of a hexahedral screw, there may be a wrench bolt, most often a 17. The thread is ordinary, unscrew counterclockwise. Do not lose the sealing washer.
If no grease is visible on the inside face of the screw, 3 to 4 grams should be added. Turn the transmission by hand, changing the direction of rotation to distribute the grease on the gears.
Then put the screw back in place by tightening it firmly.
Main gearbox malfunctions and troubleshooting
Various breakdowns occur with the gearbox of an electric or gasoline grass trimmer. The most common ones are shown in the table below. There you can also find the causes and remedy.
|Gear unit malfunction||Possible causes||remedy|
|the transmission unit is very hot||Use of unsuitable (low-quality) lubricants or their absence||Change or add lubricant|
|Gears are new and have not fretted||run in for a short time without heavy loads with regular stops so that the mechanism has time to cool down|
|shaft galling during rotation, play and knocking||one of the bearings is destroyed or excessively worn out||replace the defective bearing with a new one|
|Transmission mechanism comes off the brushcutter bar or is loose||damage to its housing||part must be replaced|
|in some cases of minor damage, tighten the point of fracture with a metal band|
|not fixed on the pipe||wear of the coupling||it is possible to wind wind winding by insulation tape on the fixing point or to change the shaft|
|the output shaft with the blade does not turn or stops when the load increases||Wear on the gears or one of the gears||The interacting pairs of worn out parts need to be replaced|
Bearings are destroyed by the use of unsuitable grease or by the absence of grease. Also their damage is caused by heavy use of the brushcutter and the ingress of foreign material particles (such as broken metal teeth of mechanical gears) due to the fact that the integrity of the dust collectors are broken.
To remove the bearing, you need to disassemble the gearbox and use a special puller. If you don’t have one, you can try doing it with a hammer and mandrel. In this case work carefully so as not to damage the seating. It is not recommended that you use preheating to remove the bearing. This is because the metal may lose the necessary performance characteristics.
If the blade stops rotating under load or does not turn at all, you will hear an unusual noise.
Most gearbox problems can be easily fixed with your own hands. You should buy replacement parts that are “original” to the model of brushcutter you are using.
Most mowers are equipped with a gasoline engine (ICE), it can be two or four stroke, there is no particular difference. Four-stroke is more economical and powerful, but it is harder to maintain and more expensive to repair. The two-stroke is easier to maintain, cheaper, but it is low-powered, consumes more fuel, has a dirtier and noisier exhaust. There are also combined motors. In addition to gasoline engines grass trimmers can be equipped with electric motors, which are connected to the domestic network 220V long cable, but, as a rule. these are household appliances as. are tied to the power wires.
In most cases, the required portion of oil or its complete replacement 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 the mower is regularly used for mowing young grass on large territories, it is necessary to lubricate the gearbox at least once per 30-45 hours. And if a grass trimmer is needed for daily mowing not only young grass, but also old tall, woody weeds, then it is necessary to change the grease in its gearbox at least once every 20 motor-hours.
Such factors as increased noise and overheating will tell you that the gearbox of the lawnmower needs lubrication. In this case, remove the mechanism, disassemble it and check the internal parts. If during inspection it was found that there is enough grease in the node, then it must be replaced as a whole. If there is too little oil, the operator will need to add the missing amount of lubricant.
Varieties of lubricating compounds
Greases of different consistencies are used for maintenance of gear units:
- Semi-liquid. Such compositions contain a variety of additives and additives.
- Plastic. They are the most universal option. Most often used for gear and screw drives.
- Solid. Plate slurries in original condition.
Special gear compound refers to a semi-liquid system.
STIHL grass trimmer grease is a popular choice. Thanks to the special composition and components, wear and tear is significantly reduced and corrosion resistance is increased. The main properties of this brand of grease are: