How To Put The Piston On The Trimmer

How to put the knife on the trimmer
Before you put the knife on the trimmer, you need to know on which tool which blades are placed. When should you use trimmer knives.

How to put the knife on the trimmer

With the arrival of summer, many owners of personal plots are worried about the question of how to put the knife on the trimmer. No less relevant are the questions of why and when it is advisable to replace the line on the brushcutter with a more durable cutting element. In our article we will try to disassemble all this and give useful recommendations to summer residents.

What knives to put on an electric and gas cutter

Before buying and putting a knife on the brushcutter, we will find out what they are and in what cases they are used. Today manufacturers offer the consumer a large number of types of these consumables. In general, all cutting tools designed for mowing grass can be classified:

  • By the type of material from which it is made;
  • According to the shape of its cutting blades.

The main material for making trimmer knives can be plastic or metal. The use of such consumables largely depends on two parameters:

  • Type of brushcutters;
  • Mowing areas.

For safety reasons, manufacturers do not recommend putting steel knives on electric trimmers. Almost all brushcutters powered by an electric network and a battery are equipped with plastic blades. Depending on the manufacturer, they can be of a solid disc-shaped design, with several blades or in the form of a special mowing head providing for the installation of removable plastic blades.

How To Put The Piston On The Trimmer

Straight bar for petrol trimmer and curved for electric

To put a metal knife on an electric trimmer is not allowed by its design features.

  1. The curved bar of the machine reduces the distance from its working part to the mower’s feet. In the event of a collision of the blades with a stone or other solid object, the scythe is thrown to the feet.
  2. The high torque we mentioned above, in the event of a metal blade hitting a hard object, transfers a heavy load to the trimmer flex shaft and its motor. What causes them to fail prematurely.
  3. The handle of the electric scythe most often does not have a limiting bar acting as a stop. That does not exclude injury to the legs.

It is these features that make it possible to use only plastic knives on trimmers with electric motors. Upon collision with an obstacle, the blades are destroyed, thereby protecting the mower’s legs from possible injury.

The use of metal knives only on gasoline trimmers is also due to design features.

  1. The straight bar design increases leg clearance for complete safety.
  2. Comfortable U-shaped and J-shaped handles for a firm grip. The D-shaped handles of the brushcutter are equipped with a limiter resting on the leg of the mower, which does not allow the head to come close to the feet when the cutting disc meets a solid obstacle.
  3. The clutch of the gasoline engine allows smooth acceleration to the optimum level. And when the blade hits a hard surface, it can absorb part of the impact.

Thus, petrol trimmers with a metal blade installed are best used in large areas. They will successfully cope not only with high coarse grass, weeds, burdocks and nettles, but also shrubs, as well as young trees.

The shape of the blades of the disc supplied to the trimmer does not in any way affect the quality of the work performed. Speed ​​does not depend on them either. Triangular, trapezoidal, rectangular shapes are all the marketing ploy of manufacturers.

Why you need to put the knife on the trimmer

A trimmer with a knife installed on it is most convenient to use for more comfortable mowing of tall and coarse grass in the country. The line on the brushcutter cannot cope in such cases. Thin tears very quickly. Using 2.3mm thick cord or homemade rods with cables causes the vegetation to wrap around the spool. This increases the load on the engine. As a result, the piston group and other moving parts of the unit wear out very quickly.

If the weeds are mowed with an electric trimmer without a knife, only a fishing line, even a thick one with a curly section, will not solve the problem. There is always a risk of overheating the motor and damaging the flexible shaft. And it’s all about the large torque of the electric motor. Grass wrapped around the spindle creates strong resistance to the shaft, which resembles a speedometer cable, which does not withstand and twists.

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In order to protect equipment from premature wear, manufacturers have provided for the possibility of installing special knives on trimmers. The design and shape of the existing cutting elements allows you to easily cope not only with coarse and overgrown grass, but also to successfully deal with young shrub growth.

How to put a knife on the trimmer correctly

Putting the knife on the trimmer is not that difficult. The manufacturer completes its tools with a special pin that allows you to block the gearbox and a wrench with which the spool and fishing line are unscrewed. The most important thing is to observe safety precautions and the sequence of assembly and disassembly when changing cutting elements.

The algorithm for setting the knife to the trimmer is as follows:

  1. Remove the protective cover;
  2. We block the drive. To do this, it is necessary to align two holes. In the shaft hub and in the gearbox cup. After combining them, insert a pin into the holes;
  3. We unscrew the spool with line or the attachment nut holding the boot (if the trimmer has not been used yet) from the hub clockwise;
  4. Next, we install the cutting knife, so that the slots on the hub washer coincide with the recesses in the hole of the cutting disc;
  5. Install the boot;
  6. We tighten the fastening nut (counterclockwise) while holding the locking pin;
  7. We tighten it using a tubular wrench;
  8. We return the protective cover to its place.

As you can see, there is nothing complicated. Now you can safely start mowing weeds on the site.

How to put the piston on the scooter correctly

The new piston is completed with a pin, two circlips and additional rings. If the scooter is 2-stroke, then the number of additional rings is 2. In 4-stroke, 3 rings are almost always installed, one of which is an oil scraper. Let’s consider the installation of the piston and rings using the example of a 2-stroke scooter. First, two compression rings are put on the piston, in special grooves. Next, we connect the piston and the crankshaft with the so-called “finger”, the fasteners are considered complete after installing 2 retaining rings on both sides of the finger. The rings should fit snugly in the designated holes. Remember: the arrow on the piston must point downward, to the floor. The above described “processes” are not difficult if you figure it out. It is best to watch the tutorial or read the scooter’s maintenance manual. Then, for sure, there will be no questions like “How to put rings on a scooter piston.”

Preparatory moments

Before replacing the piston or rings (CPG in aggregate), you need to get to the cylinder. For beginners who have no idea where this element is located, here’s a hint. The muffler is just bolted to the cylinder. In case you have no idea how to correctly put the piston on a 4t or 2t scooter, then you first need to remove the old CPG. Upcoming repairs can be divided into the following stages:

  • Removing the scooter lining (plastic);
  • Disconnecting electrical wires;
  • Disconnecting the oil hose;
  • Dismantling the engine;
  • Removing the old piston, rings (CPG in total);
  • Installation of new parts;
  • Engine mounting, wire connection and hose;
  • Plastic fasteners.

The plastic is folded to the side so as not to crush if careless. All bolts and screws are placed in a heap, if necessary sorted separately. After making sure that all gasoline and oil hoses are disconnected, remove the engine. It must be understood that removing the engine differs depending on the design features of the scooter model. As soon as the engine is removed, you can start removing the plastic cover that protects the CPG from external factors. Then remove the cylinder head. It is mounted on 4 screws. In order not to break the thread, all the bolts are unscrewed cross to cross.

We remove the cylinder and immediately inspect it. If there is no damage, then you can continue to use it. While the piston is most likely not reusable.

How to put the piston on the scooter correctly?

During the operation of the scooter, various breakdowns occur. It doesn’t matter who the manufacturer is (Japan or China). The difference is that one vehicle breaks down earlier, and the other over time. Problems can occur with wiring, engine, chassis. But, as a rule, almost everyone is faced with replacing the CPG. This abbreviation implies the term “cylinder-piston-group” or as people say “piston”. Looking ahead, it must be said that replacing the piston, piston and rings separately is not such a difficult task as it might seem at first glance. It is also worth knowing that the process of removing and replacing the CPG is almost the same on all scooters. Therefore, the article will cover the main points. Looking ahead, we recall that the power of the CPG can vary. It is recommended to install a piston of the same power as the standard CPG.

Installing the cylinder

The final stage and it must be treated with caution. Indeed, with the wrong fasteners, the slightest gap, the necessary compression will not be. As a result, the scooter will not start. Install a gasket between the engine and the cylinder and between the cylinder and its head. The head is clamped cross-to-cross with bolted connections. It is easy to check the correctness of the work performed. To do this, you need to start the engine. If the motor runs smoothly, everything is done correctly. You can also do a few kicks with the kick starter to get a feeling of compression.

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As you have already killed yourself, there is nothing complicated. Installing rings on the scooter piston, replacing the CPG together does not require special knowledge. Only details, time and desire are needed.

Mowing tall grass

If you need to cut tall grass, this is done in several passes. The lawn is processed 2-3 times. The rotating part is lowered from top to bottom, in this case, the grass is not wound around the reel.

The operator should be aware that grass wrapped around the reel will overheat the motor. If this happens, the brushcutter is turned off and the reel is cleaned.

It is most effective to cut the grass with the ends of the line rather than the entire length. In the second case, the tool works worse, the motor may be overloaded. If you need to trim over a large area, the trimmer should be tilted towards the mowing side to increase efficiency.

We mow under hay

It is better to mow hay not with a fishing line, but with a metal disc. The grass is cut at the root, keeping its length as much as possible.

Principle of operation

If we consider the principle of the trimmer, then it is similar to a hand braid. The difference is that it is equipped with a motor, with its help the cutting element is rotated.

Manufacturing companies produce the following mower models:

  1. On which a gasoline engine is installed. These garden tools have a fuel tank, which is their distinguishing feature.
  2. Devices with an electric motor. These tools are lighter because they do not have a fuel tank. But when choosing such models, you need to take into account that a power source is needed for their operation.

All electric streamers can be divided into those that run on batteries and models that are connected to the mains. Each type has its own characteristics, but they affect the power supply unit. If you do not take it into account, then the rest of the design is similar in different devices.

If you take any trimmer model, then it consists of elements such as:

  • Motor;
  • Fuel tank (electric brushcutters do not have one);
  • Levers with which the mower is controlled;
  • A knife for cutting grass;
  • Barbell;
  • Spool with wound fishing line, which is used for cutting grass;
  • Protective cover;
  • Bevel gearbox.

The motor is placed near the mowing head and can be mounted from below or from above. The gearbox is only available for models with a straight bar. If it is bent, then the main bearing becomes the connecting element. It consists of 2 bushings.

The choice of the cutting element depends on how hard the grass will have to be mowed. Most often, a fishing line is used, it is called a cord. There are products of various shapes on sale; among buyers, spiral and round ones are in demand.

The line is wound on a spool, it is inserted into the bobbin, while the 2 ends of the wire remain free. When the mower motor starts running, the bobbin rotates and the free line ends cut the grass.

How to cut your lawn to keep it smooth

In order for the lawn to be cut evenly, the mower should be lowered as low as possible during operation. The plot must be divided into squares. You need to work moving clockwise. In this case, the hay will always lie on the left without getting in the way.

How to refuel the benzotrimmer

Gasoline powered brushcutters are available with two-stroke and four-stroke engines. The first option is much more common. What are the differences between them:

  • Trimmers with a 2-stroke engine have a faster response to pressing the switch lever (it is for this reason that petrol cutters are mainly equipped with this type of engine);
  • A tool with a two-stroke engine will be much lighter and also easier to maintain;
  • Fuel consumption of a two-stroke engine is higher than that of a 4-stroke engine with the same power by about 30%;
  • 4-stroke engine is more environmentally friendly, since the fuel in it burns completely and is not emitted into the atmosphere, and its noise level is much lower;
  • And the most important distinguishing feature is the refueling: 2-stroke engine is equipped with one common tank, where gasoline mixed with oil is poured; The 4-stroke has a separate gas tank and engine oil tank.

For refueling, you must use fresh AI-92 or AI-95 gasoline and high-quality motor oil for garden equipment (manufacturers produce different oils for 2- and 4-stroke engines). Mineral, semi-synthetic or synthetic oil can be used.

The proportion of gasoline and oil for trimmers with 2-stroke engine can be found in the instruction manual for the particular model. Usually it is 50: 1, in some cases a ratio of 25: 1 or 40: 1 is recommended. It is necessary to prepare the fuel mixture in a separate container with exact proportions. Never pour liquids “by eye” directly into the tank without first mixing them. Detailed instructions for mixing gasoline oil, with and a description, can be found on our website here.

Running in

Before starting operation, be sure to run in gasoline mowers. The operator turns on the engine, it should run for a while at idle speed. It is necessary to ensure that the engine does not overheat, there should be no load.

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When running in brushcutters, the load is gradually increased. If you start working at high rpm, the motor will not run in well, this will affect the further operation of the mower.

When you start it for the first time, you should not completely use up the temporary resource. After the engine runs at idle speed, you can proceed to treating the lawn. The brushcutter should work no more than 15 minutes, after that the motor is turned off, it should cool down.

If you need to run in the electric trimmer, the braid is first assembled. Then do test runs at least 3-5 times. If the engine is running well, proceed to mowing. At first, they work no more than 5 minutes, then the duration of work is gradually increased.

How to refuel the benzotrimmer

Gasoline powered brushcutters are available with two-stroke and four-stroke engines. The first option is much more common. What are the differences between them:

  • Trimmers with a 2-stroke engine have a faster response to pressing the switch lever (it is for this reason that petrol cutters are mainly equipped with this type of engine);
  • A tool with a two-stroke engine will be much lighter and also easier to maintain;
  • Fuel consumption of a two-stroke engine is higher than that of a 4-stroke engine with the same power by about 30%;
  • 4-stroke engine is more environmentally friendly, since the fuel in it burns completely and is not emitted into the atmosphere, and its noise level is much lower;
  • And the most important distinguishing feature is the refueling: 2-stroke engine is equipped with one common tank, where gasoline mixed with oil is poured; The 4-stroke has a separate gas tank and an engine oil tank.

For refueling, you must use fresh AI-92 or AI-95 gasoline and high-quality motor oil for garden equipment (manufacturers produce different oils for 2- and 4-stroke engines). Mineral, semi-synthetic or synthetic oil can be used.

The proportion of gasoline and oil for trimmers with 2-stroke engine can be found in the instruction manual for the particular model. Usually it is 50: 1, in some cases the ratio is 25: 1 or 40: 1. It is necessary to prepare the fuel mixture in a separate container with exact proportions. Never pour liquids “by eye” directly into the tank without first mixing them. Detailed instructions for mixing gasoline oil, with and a description, can be found on our website here.

How to cut your lawn to keep it smooth

In order for the lawn to be cut evenly, the mower should be lowered as low as possible during operation. The plot must be divided into squares. You need to work moving clockwise. In this case, the hay will always lie on the left without getting in the way.

How the trimmer works and how to use it correctly: refueling and first start

Brushcutters are devices that make it easy to maintain lawns. The question of how to use the trimmer is asked by those buyers who are just going to purchase a garden tool. The industry produces devices of different types, so when choosing, you need to pay attention to their characteristics.

Wet Weather Operation

Electric mowers must not be used in the rain, there may be a short circuit. When the precipitation stops, you must wait until the grass dries up.

Not all gasoline mowers are protected against moisture, so some manufacturers prohibit the operation of mowers in the rain.

How to put on a belt

If the tool has a shoulder mount, hang it on the shoulder before starting work. The trimmer is fixed on both shoulders if it has a knapsack mount.

The bicycle handle model is held with 2 hands, the D-shaped handle is wrapped around the palm. The belt must be worn so that it is comfortable, then the back will not get tired.

Running in

Before starting operation, be sure to run in gasoline mowers. The operator turns on the engine, it should run for a while at idle speed. It is necessary to ensure that the engine does not overheat, there should be no load.

When running in brushcutters, the load is gradually increased. If you start working at high rpm, the motor will not run in well, this will affect the further operation of the mower.

When you start it for the first time, you should not completely use up the temporary resource. After the engine runs at idle speed, you can proceed to treating the lawn. The brushcutter should work no more than 15 minutes, after that the motor is turned off, it should cool down.

If you need to run in the electric trimmer, the braid is first assembled. Then do test runs at least 3-5 times. If the engine is running well, proceed to mowing. At first, they work no more than 5 minutes, then the duration of work is gradually increased.