What and how to grease grass trimmer gearbox? How to choose and apply the correct lubricant

Gearbox for brushcutters Buying any machine is kind of a lottery, but a lot also depends on the gardener. In caring hands, even the Chinese models are used for a long time and do not let their owners down at a bad 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.

Gearbox 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 Performing Gearbox Maintenance

I recommend the obligatory preventive maintenance of a new gasoline grass trimmer right after the purchase, with the addition of grease in the gearbox. For all the high cost of garden equipment, some manufacturers cut corners and lubricate only to a minimum during the break-in period.

How often should the gearbox of a brushcutter be lubricated?

A preventive inspection of the transmission with the addition of liquid grease is often carried out once a year at the beginning or end of the season. If you don’t use your petrol grass trimmer on a professional scale, this is enough.

If you do a high volume of cutting, you should lubricate the gearbox of your brushcutter every 20 to 50 operating hours. If the operating conditions are difficult, for example if a large field is mowed all at once and the lawnmower has not had 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 node.

Also, I recommend the complete replacement of lubricant, disassembly and flushing 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, 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 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 heavy loads.

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

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

It is necessary to notice that many owners brushcutter on open spaces of the former CIS for greasing a gearbox use usual Letol-24 or grease for Cables on a lithium basis. It is easy to fill the reducer with a 5cc medical syringe.

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

How to lubricate the gearbox of brushcutter, gasoline grass trimmer

Side bolt 17 on the gearbox of the 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 trimmer upside down to avoid gasoline leakage.

Remove the side screw on the brushcutter gearbox. Depending on the manufacturer of the garden tool, there may be a hexagonal bolt instead of the hexagonal bolt, often a wrench of 17. Threads are common, unscrew counterclockwise. Don’t lose the sealing washer.

If you can’t see any grease on the inside face of the screw, you need to add 3 to 4 grams. Rotate the gear by hand, reversing the direction of rotation to distribute the grease over the gears.

Then replace the screw and tighten it firmly.

You will need

Take a syringe and temporarily remove the piston. Put grease in the cylinder. It is usually 5-10 g (for more exact amount see your brushcutter manual).

Don’t be lazy to spend a few minutes after buying your brushcutter and before mowing season to grease this important assembly. And your tool is always ready to use at any time and will operate for many, many years.

Tools and materials required

The following tools and materials are needed to service the gearbox:

Allen wrench for opening the oil hole in the Geareducer

This kind of wrench is usually supplied with your brushcutter or trimmer.

The next tool is a standard 10 ml medical syringe. That’s how to get the lubricant into the gearbox.

It is recommended that you use a brand-name lubricant from the brushcutter manufacturer. As a last resort, you can use any lubricant for lubricating rotating mechanisms, such as Lithol 24.

Action Open the gearbox

In order to access the reducer, it should be opened. To do this, you need to unscrew the bolt on the gearbox with an Allen key. The bolt for all brushcutters is in the same place, near the tool.

Action Filling the sprayer with oil

The diameter of the tube of grease does not match the diameter of the gearbox

Use a grease gun to force grease into the gearbox without any problem.

Then fill grease from the grease tube into the syringe.

Then the piston is reinserted into the syringe. Syringe is ready to add grease to the gearbox.

Action Filling the Gearbox with Grease

A grease gun is inserted into the reducer bore

First insert the grease gun into the reducer bore.

Squeeze a little grease into the reducer and turn it about a quarter of a turn

Then squirt some grease into the Geareducer and turn it about a quarter turn.

When all the grease has been squeezed out, the process is complete

gearbox, lubrication, echo, brushcutters

Small portions of grease are applied. After each grease fill, turn the gearbox by 1/3 to 1/4 turn. It is desirable to select the amount of grease for each filling so that the Geareducer will complete a full rotation during the lubrication process.

Action Sealing the gearbox

After the gearbox has been filled with grease, tighten the gearbox bolt and clamp it well.

How to lubricate the gearbox of a brushcutter (easiest way)

How to lubricate the gearbox of grass trimmer or brushcutter: the correct care for garden tools | (Photo Video)

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Dismantle gearbox to check and replace grease and wear particles

To do this, disconnect the cowl and the shaft from the gearbox. Remove the spindle and wash the pinion assembly to make it easier to disassemble. Unscrew the plug bolt, but it can be left in place, t. к. it does not carry any power load.

Then remove the drive pinion from the housing. To do this, use a special puller to remove the circlip from the ring slot, which holds in position in the housing block of the pinion.

Since the bearings are mounted with their outer ring in the seats with an interference fit, it is not easy to remove them. To make this task easier, heat up the gear housing in the bearing area with a construction hair dryer.

As soon as the metal of the housing heats up, it expands and the tension disappears. Now you can easily remove the helical drive pinion assembly with two identical paired bearings from the housing.

Proceed to remove idler pinion with spindle assembly from gear housing. Here we first use a pair of pliers with narrow jaws to remove the centering bush, then the stuffing box by prying with a screwdriver or other suitable tool.

As in the first case, pull the retaining part out by pressing it together with the circlip puller using the holes in the lock.

Heat up the gear housing in the pinion bearing location with a hot air gun and pull out after a while by slightly pulling on the spindle.

Main transmission faults and their solutions

Various malfunctions occur with the gearbox of an electric or gas grass trimmer. The most common ones are shown in the table below. There you can find the causes and remedies.

Failure of the gearbox Possible causes of failure Remedies
gear is very hot Use of unsuitable (low-quality) oil or lack of oil you need to replace or add oil
new gear and not used for work for a short time without heavy loads with regular stops so that the mechanism has time to cool down
jamming of the shaft when turning, play and knocking failure or heavy wear of any of the bearings Replace defective bearing with a new one
gear mechanism bounces off the hedge trimmer shaft or wobbles damage to its body part needs to be replaced
in some cases minor damage by metal clamping they increase the malfunction
not attached to the tube oil It is possible to make a wrap of duct tape in a place of fastening or to change the bar
The output shaft with the blade does not rotate and stop when the load increases Worn gears or one of them The cooperating pair of worn out parts must be replaced

The bearings are deteriorating because of the use of unsuitable oil or lack of it. They also cause damage. Difficult operating conditions mowing and penetration of foreign material particles (e.g., broken metal gears of mechanical gears) due to the fact that the integrity of the dust covers is compromised.

To remove the bearing, you need to disassemble the gearbox and use a special puller. If this is not the case, you can try to do it with a tipped hammer. In this case work carefully not to damage the seat. It is not recommended to use the preheating method for photographing bearings. This is due to the fact that the metal may lose the necessary performance characteristics.

Most gearbox problems are easy to solve by yourself. It is recommended to buy “native” replacement parts designed for the mower model used.

Prevention and possible gearbox malfunctions

A lawn mower requires first maintenance immediately after purchase because the manufacturer puts a small amount of grease in the mower. If the grass trimmer performs a small amount of work, then lubricate the device at the beginning and at the end of the season. If the mower works a lot, then lubricate after 30-55 hours of operation.

The most common faults are.

  • Too much heat. This indicates that the lubricant has run out. It is necessary to add lubricants and run it in on a low setting.
  • Gear unit vibrates or wobbles. This situation indicates mechanical damage.
  • Knocking noise. The bearing is destroyed, the dust cover is damaged.
  • If the grass trimmer blade jams, the entire mechanism must be replaced.

To learn how to correctly lubricate the gearbox of your lawnmower, please read.

Gear and flexible shaft grease 300 g Echo X695-0000

5-year extended warranty on all Echo products except electric motor products (electric chainsaws, electric shears) and BEAR CAT Echo products.

5-year extended warranty on all Echo machines, except for machines with electric motors (electric chainsaws, electric shears) and BEAR CAT Echo machines.

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Write off up to 321 р. 8 bonuses will be credited

Echo Lubricant X695-000000 is designed for the lubrication of gear parts and flexible shaft of trimmers. Volume 300g.

  • The manufacturer reserves the right to change the characteristics, appearance, configuration and place of production without notice to the dealer. This information is not a public offer

Echo is a brand of garden equipment that originated in Japan in 1963. Today owned by Echo INCORPORATED, a North American corporation founded in 1972. The products are popular in 50 countries all over the world. The manufacturer guarantees high quality and long life of the equipment. He confidently gives 5 years warranty on condition of service in the Echo service centers, which work in all regions of Russia.

What users say about lubricants

Specialists advise to use only original materials that meet the characteristics of the manufacturer. If they are not available, you should clarify what to lubricate the grass trimmer gear. Experienced users do not recommend the use of solidol, as 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 working temperature range of solidol. from minus 40 to 65 degrees, but even with these parameters in the process of heating the density of the material increases, and the grease itself becomes coarse. In case of urgent need to treat a tool, “Lithol-24” can be used.

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