How to refill a trimmer line in a grass trimmer

How to change trimmer line in a trimmer

The grass trimmer is the most common unit used to cut grass and cut small shrubs. This machine is notable for its ease of maintenance, uncomplicated operation during work, and thanks to its low weight even women can cope with it. It’s no secret that the quality of grass mowing requires the correct selection of cutting tools. As the latter, trimmers use special cutting attachments (discs, knives) or trimmer heads with a fishing line inside. Nozzles and line for the trimmer are an expendable tool, but if the knives can be sharpened, then when the line is used up it needs to be replaced. In this article, we will tell you in detail about how to change the line for the trimmer.

The mowing head for grass represents a cylindrical body, in which a spool (bobbin) with a tucked in it a fishing line (cord) is installed. This design can be installed on both gasoline and electric trimmers. The heads differ in the way they are threaded and fed and are available in 3 types.

  • Automatic. The cord is fed in after the user has lowered the engine speed. Although automatic filament feeding is convenient if you perform large amounts of work, but such bobbins have one disadvantage. a high consumption of thread.
  • Semi-automatic. This type of head does not require complex manipulation from the user. Principle of their work is designed so that cord is lengthened automatically while machine works at full speed. It is enough to slightly knock the head trimmer for grass on the ground (this removes the cord lock), and the line for the trimmer thanks to the centrifugal force is extended from the bobbin, and then cut to length by the knife, located on the protective cover.
  • Manual. Extending the cord requires the machine to stop, after which the trimmer line is pulled manually.

Based on the above, semi-automatic screwdrivers are the best option. You should also take into account that the grass trimmer reels for grass are single string (used only for trimming grass) and double string, which are used for mowing tall grass and small, with thin stems of bushes.

How to replace a trimmer line on a trimmer?

Grass trimmer line replacement with step-by-step instructions will allow even the inexperienced in such matters lawnmower owner to perform quite complex work.

However, before you begin work on replacing the line on your trimmer, you need to ensure that the work is done safely. In particular, make sure that the mower cannot start accidentally or unintentionally:

  • prevent unintentional start-up,
  • remove the battery (if used),
  • place the tool in a comfortable working position.

It is convenient to perform work on the grass trimmer line replacement when the lawnmower is lying on the table and the handyman can approach the tool from any side.

Grass trimmer head cover removal

The first stage of disassembly is removing the cover of the grass trimmer head. Using the “Black and Decker” and other trimmer models as an example, to remove the cover it is usually enough to apply some force to release the latch, which is located on the side of the head.

On some models of lawnmowers initially provides for the dismantling of the grass trimmer head, for which the hexagon wrench supplied with the tool is used. The head is usually held by two or three screws, which are accessed through the side holes of the rear decorative cover.

The cover of the head, where the filament spool is mounted, is usually held in place by a clip pin. It is enough to press the latch with some effort and turn the cover a little, after which the cover is easily removed

At the moment of squeezing the tongue-latch, you need to slightly turn and lift the cover of the grass trimmer head to remove the winding drum.

Step two: removing the spool of fishing line

The next step in the process is to remove the reel with the fishing line from the inner area of the head. Turn the head on its open side so you can see the trimmer line and spool. On the side of the head find two recesses (eyelets), through which the line for the trimmer is led out.

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How to Load Trimmer Line on to a Bosch Grass Trimmer

The line for the trimmer should be released from the holes by turning the drum. then carefully remove the coil from the head area. Some models have the spooling reel mounted on a spring. This point must be taken into account when carrying out the extraction operation.

Procedure for removing the grass trimmer reel with fishing line from the inside of the head: 1. head complete with reel; 2. extracting gently with a slight axial turn; 3. extracted parts

trimmer, line, grass

The old trimmer line is completely removed from the reel. To perform the removal of the old line trimmer for grass, you need to remove the line from the hinges-fixators and pull the free end. All old spooling is removed this way. The same process is repeated on the second section of the reel. It is recommended to wear gloves when working.

Restring Spool for Black & Decker Trimmer / Edger

Performing line winding

Slowly complete disassembly of the bobbin spool without losing any of its parts allows you to proceed to the main task. reeling in the line. Technological features of the bobbin design and the number of working tendrils determine the sequence of operations.

Reel with one working spool pin

The simplest variant and uncomplicated sequence of actions:

  • Size of the reel and length of the original factory winding determine the recommended length of line for winding. 25 m.
  • One end of the line is inserted into the fixing technological hole inside the bobbin.
  • A line for a trimmer is wound on a reel in the opposite direction to the rotation of the bobbin on the trimmer, as a rule, on the inner side of a reel an arrow points in what direction the winding is done.
  • A small section of line is left free to lead it out. it is fixed in a specialized groove on the inside of the bobbin, designed to hold the winding when assembling the bobbin in working order.
  • The leftover end of the fishing line is passed through the hole of the outer part of the bobbin.
  • The bobbin halves are assembled and placed on the trimmer bar.

Reel with two operating tendrils

In this type of bobbins, you should determine the number of grooves for winding the line lying on the inside of the spool:

A 2-3 m trimmer line is used for both cases. In single-strand spools, the line for the trimmer is pulled through the through hole, its ends (tendrils) are folded together and aligned, then reeled in the opposite direction of rotation of the bobbin on the rod. inside, an arrow usually indicates the correct winding direction. If there are fixing grooves, the ends of the fishing line are pushed through them or held by the fingers of a free hand, put into the through hole of the outer half of the bobbin, the bobbin is closed and attached to the rod of the trimmer product.

The difference in the winding of the line in dual reels is that initially a piece of line 2-5 m long is folded in half (to determine the middle fold), and the loop of the fold is inserted into a special groove between the grooves. Both tendrils of the fishing line are wound each on its own groove, fixing the tendrils and reel assembly is similar to the variant with one groove discussed above.

The first performance of this procedure may seem lengthy and rather laborious, but with time and experience, this task will be accomplished much faster and easier.

The video below will clearly show you how to tuck the line for the trimmer into the grass trimmer reel and properly wind it up. this operation is nothing complicated and with some patience will definitely succeed:

Choosing a line for the trimmer

To wind the string on your mower correctly, it is best to choose a mower consumable of the right quality and with the right characteristics. The thicker the cord, the more difficult tasks you can do with it. In most situations you use a standard cord with D=2mm.

If you don’t know what diameter to choose for your mower, there is one way to do it:

  • Carefully consider the bobbin. Most popular manufacturers such as Husqvarna, STIHL, DAEWOO, Champion, etc., indicate the parameters of the recommended consumables;
  • Read the instruction manual for the device;
  • In practice, try placing the string in the outlet. Material with a suitable diameter can pass through without obstruction.
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There are a few goody-two-shoes on how to pick up the thread on a grass mower:

  • If the machine has a motor of less than 500 W, then it is worth using thread with a thickness of no more than 1.3 mm.
  • 2 mm cord is great for 1 kW machines;
  • If you have a gasoline-powered machine, pay attention to the shaft. The bent models are best suited for 2 mm, the straight ones 2.4 ≤ D ≤ 3 mm.
  • the higher the power, the thicker the string must be.
  • Buy only quality and durable brand-name consumables from the machine manufacturer. At professional garden equipment stores, experienced salespeople can help you buy the right consumables.

AutoCut C

The following type of mowing head is also equipped with a spool for the cutting line, and it is fed while the tool is running, like the AutoCut variant without the letter C. However, in this modification, the replacement of the trimmer cord is especially fast and easy. No need to open the mowing head and prepare two identical sections when installing.

trimmer, line, grass
  • Before you tuck the trimmer line into the grass trimmer reel, set the handle to a position where the arrows on the head are next to the round indentations.
  • Take out a cutting string of maximum length. 8 m. and insert its ends into the opposite holes of the drum. Make sure the line ends are cut at a bevel. Then turn the spool clockwise as indicated on the cover. This ensures that the lines for the grass trimmer are wound around the bobbin.
  • Cut the protruding loop in the middle. The resulting ends of the string should protrude from the drum by about 12 centimeters.

Handle shape

Manufacturers offer 2 handle options:

T-handle on models with auto-reeling line. Work with 2 hands on either side of the boom. This is advantageous for mowing large areas of vegetation. The cut is made like a grass scythe. from one side to the other. Not easy to maneuver and does not work well in difficult terrain. Bicycle handlebars can be fitted with control buttons. Home grass trimmers have the starter button on the boom.

Classic grass trimmer with a reversible handle and control buttons

Gasoline trimmer with a D-shaped handle is more maneuverable, it is convenient to mow the grass in areas with difficult terrain. Arms of this tool are placed one above the other. The disadvantage of the handle is that it is difficult to hold, and operating such a device is more difficult.

The “J” handle is the most uncomfortable, so it is rare.

Choosing a Filament

In order to easily wind the line for the trimmer on the grass trimmer reel, it is worth determining what tasks the garden tool will perform. The thicker the thread tucked into the head, the more difficult the tasks it can perform. It should be noted that often a universal thread is used, the width of which does not exceed 2 mm. You, in turn, can determine the size by using the following methods:

  • read the information in the manufacturer’s instructions;
  • check the suitability of the line for use by yourself by trying to insert it into the hole of the spool;
  • Examine the bobbin for information on the diameters allowed for use.
trimmer, line, grass

The choice of fishing line for the grass trimmer reel can be made according to the type of motor. For example, excessively thick thread can cause an increase in rotational resistance. Because of this, the load on the motor will increase, which will certainly affect the quality and service life of the motor in the future.

It is easy to avoid negative effects. For this purpose, it is necessary to consider that for electric motors with power up to 500 watts a line for a trimmer with diameter to 1.2 mm is ideally suited. If you can not get such a thread, you can use 1.6 mm cord. A filament of 2 mm in diameter, on the other hand, is used for motors with more than 1 kW. It is worth noting that a 2mm cord is often used for winding on a bent mower. If the gasoline device has a straight shaft, you should use a thread of 2.5 or 3 mm. The thickest lines are installed only on devices with power equal to or greater than 1.3 kW.

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The last, but not the least important factor is the type of cross-section of the line. When selecting one, you should be guided by the tasks assigned to your gardening tool. There are several popular cross-sectional options:

  • Twisted. has a small margin of safety, so it is suitable only for young grass;
  • serrated. characterized by sharp edges, suitable for working on overgrown weeds;
  • round. the most common cross-section. These lines handle fresh grass well, but are not suitable for shrubs and dead wood;
  • Rectangular, square and star-shaped cross-section types. due to their low strength are used for working on lawns.

The strongest and most versatile cord is a two-piece trimmer line with a round section, with a core inside. This is the right kind of fishing line for most jobs. It should be remembered that the use of fishing line, ordinary wire and other third-party materials as cord carries a danger to others.

How to remove a fishing line for a trimmer

To change a line in your trimmer, remove the trimmer head cover. To do this, press the latches on both sides of the cover with your fingers and pull the cover up. This will expose the spool. Once there, pull it out by pulling up on the axis on which the spool sits. If the ends of the fishing line are sticking out of the head holes, then lift the spool on its axis and pull the rest of the line inside out of the head holes. Now the part does not hold anything and it is easy to remove it and remove the remaining working thread.

The reel is divided into two parts by a central partition with a cutout. The size of the parts varies from one model to another so check how much line can be wound on the reel. Its length varies between 1 and 4 meters.

Tips and recommendations on how to wind the line for the trimmer and what you need to know

There are some useful tips and recommendations which will be useful to learn not only for beginners, but also for the experienced masters. These tips will help prevent negative consequences in the form of injuries and malfunctioning of the mechanism. These recommendations state the following:

  • It is necessary to install the cover until it clicks. And it is 2 or more clicks, which depends on the number of locks. If one latch does not click, then when starting the tool, the drum can jump out and injure a person
  • Do not reel in the trimmer line with a strong pull on it, or in an amount greater than can be inserted in place. It is better not to reel in more fishing line, as this will lead to negative consequences in the form of inability to unwind it when necessary
  • If you own the tool not with two line leads, but with one (usually these are low-powered units), then the winding process is performed in a similar sequence as described above, only with the difference in the absence of the middle rim between the extreme bases of the spool
  • After changing the material, you should first check the functionality of the tool, and only afterwards proceed to mow the grass. If you do not make a preliminary check, the fishing line can unravel, and injure a person

This is interesting!Choose the correct material, to prevent injuries when working with petrol or lawn mowers, trimmers and brushcutters. While you cut the grass, small stones and other materials can be thrown under the rotating parts and may fly away over long distances. Therefore, even though a line for trimmer is not a knife, you should wear special protective outfit when working with the tool. The result of the work done is the following: after replacing the new material, the normal material lasts for up to 600 square meters, but taking into account the reinforcing layer on the line. Conventional nylon materials last less, which is important to consider when working. Do not try to mow thick-stemmed grass with a fishing line, as special metal discs or knives are available for this purpose.

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