How to correctly assemble the throttle grip on a trimmer
Repair trimmers need to be carried out as soon as possible at the first signs of failure, that insignificant faults have not led to more severe dilemmas. For all models, it is typical to have these main nodes and structural parts: the drive accounting system (motor), transmission devices, the working part (a knife on another line), belts and handles. Breakdown sometimes occurs at least in any part, alas, some nodes are inoperable even more often than others.
The gasoline- or electricity-powered brushcutters (as well as the different models from different manufacturers) differ in design and temperament. Some of them are easy to remove in home-made conditions, and others will require more overhaul or a call to the service center.
frequent include breakdowns of chain saws associated with such elements of design:
- engine (piston system);
- carburetor;
- the boom;
- starter (rope breakage, breakage or spring failure);
- problems with the ignition system or fuel supply;
- The transmission mechanism (gearbox);
- filters and muffler.
- If the brushcutter makes unusual noises during operation;
- The lawn mower does not start, does not reach the necessary speed or stops;
- When the engine is running, the working part does not rotate or slips;
- gasoline leakage;
- excessive heating of individual assemblies.
There can also be smaller malfunctions that can be detected without any special diagnostics:
Small faults can be fixed easily. Repair of gasoline trimmer for grass in more complicated cases requires preparatory diagnostics to clarify the exact circumstances. If you have the proper knowledge and ability to locksmith work, the problems can be fixed without the help of others, replacing the broken parts.
What to disassemble the lawnmower for repair will be useful, to put it simply, such a device:
- a set of screwdrivers (with various tips) and wrenches;
- A small puller for removing bearings;
- a special candle wrench;
- hammer.
Each time it will be useful to disassemble separate nodes.
Please note that the starter (starter) in a number of models is nondisassembled. in this case, in dilemmas with a child is likely only to change the element. If the node is disassembled, it can be repaired, of course, by removing and replacing the rope and spring, or by installing the latter to the area (when ready it is out of engagement).
It is often necessary to carry out repairs to the grass trimmer boom. It is essentially a construction of such parts:
- The drive shaft is made of steel, which has polyhedral or square splines on the upper and lower ends;
- aluminum tubes;
- the plastic bushing designed to maintain the centralized position of the drive shaft in the tube (so as not to leave it vibrating);
- shock absorber made of rubber, suitable for the connection of the rod with the motor
- the handlebar with the knob used for the steering, and the rack, the strap.
Some models have a shock absorber between the control rack and the boom. The control elements (the locking lever, the ignition switch, the throttle button) are placed on the.
To the lower end of the boom is connected conic angle reducer, alas some light models are available without it. This is due to the fact that their rod has a curved shape, and the shaft is a flexible cable.
How to disassemble the boom and reassemble it for the lubrication of the shaft or to change it is explained in detail in the video clip below. The same method is used to replace the broken rod with a new one.
It often happens that the polyhedral or square splines of the driveshaft “slizzy”, and then the working mechanism does not rotate or does it with perobukkuskoy. In this case, the clutch shaft must be replaced.
When there is a knock in the tube, you should disassemble the rod and check the condition of the sleeve, and if necessary, to replace it. How to assemble the correct gas handle on the trimmer, discussed in the video below.
If you can not install the whole, applicable to the installation, the boom, you can tighten the breakage with a clamp or impose a semblance of the tire. This measure is temporary, so you should be able to quickly perform the change.
When the blade or line for a trimmer when the engine is running at idle speed is actually constantly rotating, and from the front of the motor is coming uncharacteristic sounds, it shows a breakage of the clutch. A cracked spring is the cause. For all this, the technique mows normally.
If the slipping occurs, the pads are worn out.
- The muffler cover is removed;
- Remove the iron stand;
- Then the cylinder and starter covers are removed, to get access to the clutch;
- unscrew the side screws to remove the shock absorber cover;
- Remove the tube with its use, previously letting go of the tightening screws;
- unscrew the clutch (presented in the photo below);
- Inspect the condition of the spring, pads and bearings;
- the new spring is hooked by slipping the hooks into the proper holes;
- To change the pads need to remove the spring, and then unscrew the bolts for them.
How to disassemble and reassemble the throttle grip of a Chinese brushcutter grass trimmer
If desired, lock the crankshaft with a rope, for example.
Problems with the engine are caused by problems with the piston system, seals, rings. To remove them, you need to remove the drive motor.
Find exactly what caused the failure, it is difficult. If there is a warranty, the machine should be taken to a service center for diagnosis and repair. If there is no ability to call in a specialist for help, then you should consider that it is often necessary to change the piston rings. For this purpose it is useful to disassemble the engine, to take out the piston. Do it in this order:
- Remove the lid of the plastic housing, unscrewing the screws, otherwise unscrewing the clamps;
- Disconnect the rod with the crankshaft;
- remove the cylinder head;
- take out the piston and rings;
- Replace them as needed;
- Do the assembly in reverse order.
The rings should be installed carefully, because they are quite fragile.
How to install the piston and changing oil seals during the repair of the engine, clearly shown in the video clips below:
If the mower is used continuously, the gearbox may be broken. This is where the gears wear out, the bearings (they also break of course). Lubricate the assembly frequently to keep it infrequent. Frequency is often specified in the operational annotation to the model used (not less than once a season). As an annotation of the repair ones will serve as the roller below.
What to lubricate the gearbox, you should unscrew the plug and simply squeeze the inside of the node appropriate lubricant, twisting the shaft.
Without assistance of others, the carburetor can only be removed and cleaned, and additionally change the gasket between it and the engine. The tightness of the node at home is quite problematic. The main thing. to correctly assemble the technique after repair, that the grass trimmer worked freely.
How to disassemble and assemble the throttle lever Chinese brushcutter trimmer for grass
If desired, lock the crankshaft with, for example, a rope.
Problems with the engine can be caused by problems with the piston system, oil seals and rings. To remove them, you need to remove the drive motor.
Finding what exactly caused the breakdown is difficult. If there is a warranty, take the mechanism to the service center for diagnosis and repair. If there is no ability to turn to the experts for help, it should be taken into account that it is often necessary to change the piston rings. For this purpose you will need to disassemble the engine, take out the piston. Do it in this order:
- remove the cover of the plastic housing, unscrewing the screws or otherwise squeezing the clamps;
- disconnect the rod and crankshaft;
- The cylinder head is removed;
- take out the piston and rings;
- as necessary make their change;
- Assemble in reverse order.
The rings should be installed carefully, as they are quite fragile.
As the piston is put and there is a change of oil seals at carrying out of repair of the engine, it is visually shown in video clips further:
With constant use of the lawnmower can break the gearbox. Here wear gears, bearings (they also break of course). To make this happen infrequently, it is necessary to lubricate this assembly frequently. Frequency is often specified in the operational annotation to the model used (at least once a season). As an annotation of the repair will serve the roller below.
What to lubricate the gearbox, you should unscrew the plug and simply squeeze inside the node suitable lubricant, scrolling the shaft.
Without assistance of others, the carburetor can only be removed and cleaned, and additionally change the gasket between it and the engine. The tightness of the assembly at home is rather problematic. The main thing. the right technique to assemble after repair, so the trimmer to grass worked freely.
How to assemble the control knob on the Carver trimmer
Electronic grass trimmers differ from gasoline devices more lightweight design. Conditionally, the electronic braid is divided into mechanical and electronic parts. Accordingly, there are the same groups of problems that occur with this equipment.
Most of the malfunctions cannot be visually detected. For this purpose, it is useful to use different devices. Visually determine the following:
- the integrity of the power cable is broken (the insulation is torn from it, or it is obviously broken);
- If the starter button is stuck;
- Mechanical exterior damage to the brushcutter;
- problems with the cutting part;
- Grass cutter stopping when clogged with grass;
- damage to the fork.
To find out which part is broken in other cases, will need to disassemble the brushcutter and check one by one more possible options. At the same time assess the external manifestations of deviation from the normal operation of the device. They help to determine the following causes.
Repair of electronic grass trimmer requires the presence of subsequent devices and tools:
Electronic grasshopper often does not work due to circumstances not specifically related to having it, but caused by a drop in line voltage or the malfunctioning of the socket used.
Before you disassemble and repair the electronic scythe, you should check the status of the socket and the voltage in the network. If it deviates from the standard value shown in the instruction manual, there is no point in trying to operate the mower without a stabilizer designed for the proper output. Otherwise, the electric motor can fail. Only after determining that the cause of grass trimmer failure is related specifically to the child, of course, begin dismantling the mechanism for repair.
How to assemble a handle on a Carver trimmer
Electronic grass trimmers differ from gasoline-powered devices by their lighter construction. Conditionally, the electronic scythe is divided into a mechanical and an electronic part. The same groups of problems, which can occur with this equipment, are distinguished.
Most breakages cannot be visually detected. For this purpose, it is useful to use different devices. Visually determine the following:
- The power cable is tampered with (torn or visibly broken);
- Trapping or otherwise jamming the starter button;
- Mechanical exterior damage to the brushcutter;
- Problems with the cutting part;
- stopping the grasshopper when clogged with grass;
- damaged plug.
To find out which part is broken in other cases, it is necessary to disassemble the electric scythe and check the more possible alternatives one by one. At the same time assess the external manifestations of deviations from the normal operation of the device. They help to identify the cause.
Repair of electronic grass trimmer requires the presence of subsequent devices and tools:
Electronic grass trimmers often do not work because of circumstances not related specifically to having it, but caused by a decrease in line voltage or malfunctioning of the socket used.
Beforehand, before dismantling and repairing the electric grasshopper, check the status of the power socket and the voltage of the power supply. If its value deviates from the standards specified in the operating manual, it makes no sense to try to work without the device stabilizer, designed for a suitable power. Otherwise the electric motor can be damaged. Only after defining that the reason of grass trimmer failure is linked exactly to the child, of course start to disassemble the mechanism for repair.
Trimmer handle throttle trigger.
To disassemble the electric mower for the purpose of repairing its electronic part, proceed as follows.
- The grass trimmer is placed on a flat surface (for example, a table), which does not contain unnecessary things.
- Loosen the screws on the cover, located on the table.
- Remove the half-unscrewed housing, getting access to the start button, the motor, the brush unit, bearings, electronic connections (these elements are shown in the photo below).
Brush and bearing units are shown on the photo below.
Grass cutter will work without a thermostat, but it is useful to inspect the temperature of the electric motor every day, without the help of others, from time to time giving it a cool down. It is possible to install a new similar sensor.
There is an option to check the motor start button by shorting the jumper of its contacts. If the grass trimmer works, the problem is clear. But this option is dangerous. Our client remains to do so carefully, so as not to get a blow to the electronic current. What to change the button, you should use a screwdriver to extract it from its landing and connect the wires with the old to the newest. After the replacement is necessary to assemble the electric braid, and then check its performance.
Brush replacement is required if the brushes are destroyed. With all this rather old to take out of the slot, and the new to install in their place.
Connecting terminals on different models of trimmers are actually similar, so the connection-disconnection of wires is idyentical.
Change of bearing is difficult enough operation, because it can get stuck and not be removed from the motor shaft. Pull or knock it down carefully so as not to destroy the rotor, or otherwise the seat.
When the electric motor trimmer for grass burns, and need to replace it with a new one, you should carefully remove the fan and bearings, and then install them in their place. In terms of costs, the change is actually comparable to the purchase of a new mechanism. Its carrying out in case of lack of experience with electric motors is better to entrust to professionals.
Annotation on the assembly of the electronic part of the brushcutter follow:
- Install the engine, tightening the mounting screws;
- The electronic circuit is assembled;
- Lay the wires neatly between the individual compartments in the recesses available;
- Close the top cover, snapping the locks and screwing it down.
After reassembly, the working order of the device is checked.
Probable breakdowns in gasoline and electronic trimmers enough. For the device to be operable for a long time, it should be kept clean, in a dry place. The principal point is to carry out continuous preventive maintenance (e.g., lubrication of the gearbox) and compliance with the rules of operation set out in the annotation of the device. It is better to get quality equipment from the world’s brands.
Disassembling the mechanism is recommended to take pictures of the process step by step, so as to account for all, and do not miss any detail during assembly. When replacing parts, attention should be paid to the choice of suitable devices: it is better to use unique spare parts.
Some models boom consists of 2 parts. for their connection use the clutch. Such devices are comfortable for transportation.
Lawn mower gas handle repair with his hands
In detail: repair gas handle lawnmower with their own hands from the real master for the site olenord.com.
An indispensable tool of the modern gardener or owner of a private home is a lawn mower, which allows you to effectively and efficiently bring the adjacent territory in order. The period of active use of lawn mowers falls in late spring until October. Modern machines are equipped with a strong and durable engine, a reinforced transmission and basic units. Despite this, physical wear and tear, manufacturing defects or improper use leads to the failure of the trimmer for grass. In order to make repairs trimmer for grass with your own hands need to have at least basic knowledge in the field of technology and a little experience in its repair.
The main component of any gasoline tool is the internal combustion engine (ICE), which by various means transmits torque to the executive body. In modern chainsaws as a transmission element between the motor and the trimmer head, a dural bar (tube) is used, inside which the drive shaft is located.
Thanks to the high-speed motor, the line speed can be up to 13 thousand revolutions per minute, depending on the grass trimmer manufacturer. In order to prevent mechanical and thermal damage to the gearbox, the housing has a hole for introducing grease in the form of an ointment. All brushcutter models come with a sturdy shoulder strap for extended periods of use as an owner-assisting harness.
Virtually all models are supplied with a line and steel blades, regardless of the manufacturer.
The PVC cross-section of the line for the grass trimmer can vary from 1.5 to 3.0 mm.
Constructed of tough polymer material, it tends to wear out heavily during cutting and breaks most of the time. Therefore, from time to time it is necessary to check the presence of the line in the head and, if necessary, to replace it. It is recommended that you buy an extra bobbin to quickly replace it with a spool of fishing line when it runs out.
Presented on the market today grass trimmers with an engine are equipped with D-shaped, U-shaped or T-shaped handles, which are the main controls of the unit. With a U-handle handle, for example, the throttle trigger and start/stop switch are on the right handle. D-handle design has throttle adjustment button directly on boom.
Due to the presence of many nodes and parts, the grass trimmer repair with their own hands involves the elimination of breakdowns that prevent its normal operation. It is necessary to note the most basic malfunctions of gasoline cosmos:
- Grass trimmer engine does not pick up speed;
- Cylinder-piston group (CPG) breakage;
- Failure of ignition;
- There is no connection between the internal combustion engine and the trimmer head;
- Mechanical knocking during machine operation.
- Repair of the gasoline mower’s CPG
The main component of any internal combustion engine is the cylinder-piston group (CPG), which can fail due to the wear of parts or poor quality fuel mixture.
Lubrication of rubbing parts in a gasoline by adding a certain percentage of oil to the gasoline. This process can be disrupted by old oil precipitating out in the form of sludge. In this situation, when starting the grass trimmer, the engine is greatly overheated and the most expensive breakdown occurs in a matter of minutes. To fix the problem you will need a complete replacement of the cylinder, namely the piston, packings, cylinder and piston rings. If you are not a master of internal combustion engine repair and do not have experience working with technicians, it is unlikely that you can fix the engine without the help of a specialist. Detailed steps of grass trimmer piston repair can be found here.
If the lawnmower ignition fails, the spark is lost on the spark plug and, as a result, the fuel mixture does not ignite.
It is important enough in this situation, do not rush to replace the coil, since the cause of the failure may lie in the lack of contact in the switch on the control knob.
An important point when searching for faults of the grass trimmer ignition will be the diagnosis of the mesh, where the distance between the lateral and the central electrode should be 0,5-0,7 mm. In addition, you must pay attention to the sealing ring of steel on the plug, the loss of integrity or deformation of which can lead to etching of air from the combustion chamber and, consequently, a decrease in power grass trimmer.
If the replacement check of the electrical circuit, the plug and its contacts did not give positive results, then it is worth paying attention to the ignition module of the grass trimmer, namely the gap with the flywheel. Regardless of the design and manufacturer of the lawnmower, the distance between the ignition coil and the flywheel must be no more and no less than 0.2 mm. To restore the optimal value of the gap will need to loosen the bolts fixing the coil and a special dipstick to expose the ignition of the trimmer for grass.
A clear sign of engine power system malfunction is the absence of traces of fuel mixture on the electrodes of the plug, which may be due to the following defects:
Components of the grass trimmer fuel system
- due to a clogged hole in the gas tank creates a vacuum, which prevents the normal flow of gasoline into the carburetor;
- the fuel filter in the tank is clogged due to poor fuel quality and particles;
- the mixture does not flow into the combustion chamber as a result of a clogged carburettor.
You can quickly determine the cause of the malfunction by removing the fuel hose leading to the carburetor. If the fuel mixture flows in a thin stream, you should pay attention to the carburetor. in case there is no flow it is necessary to clean the breather plug (small hole in the fuel tank lid) with a fine needle or change the fuel filter.
If the fuel flows into the carburetor, it is necessary to clean or adjust it. Adjusting the grass trimmer carburetor involves restoring the optimal mixing of the fuel mixture.
Grass trimmer carburettor with adjustment screws
To do this, pay attention to the three adjusting screws: maximum speed (H), minimum speed (L) and idle speed (LA). To start the adjustment, turn the H and L screws all the way in and release them one turn each. After starting the brushcutter and let it warm up for 10 minutes to regulate the power system in working mode. After the engine is warmed up, push the gas pedal button all the way in (12 000 rpm). Reset the no-load by loosening the screw LA. Once the grass trimmer head starts to rotate, you need to turn the screw until it stops.
Universal. Fits Chinese brushcutter models. Ordering in the cart.
Universal. Suitable for Chinese brushcutters. Ordering by cart.
Universal. Suitable for Chinese brushcutters. Checkout cart.
The throttle knob for the grass trimmer is the engine speed control knob. It is made of quality and durable materials. Usually attached to the handlebar of grass trimmer with special bolts. Has a convenient recess for the mower’s hand. Able to withstand some degree of physical and mechanical stress. The design of the handle is simple enough, so there should be no difficulties with its disassembly, repair and assembly.
Grass trimmer handle components Upper and lower cover. create a compact box to house the rest of the parts. Also, acts as a support and lock for them. Protects the engine from debris, liquids, dust and other debris. Mounting bolts hold handle covers together and provide a tight seal. Their length, location and shape can be different, based on the grass trimmer model. Locking trigger lever (locking device). locks throttle trigger position. It is not possible to increase the lawnmower’s engine speed without pushing the lever. It acts as a fuse. It has its own spring which returns the blocker to its original position. The contactor is an electromagnetic element that interrupts the electrical circuit. The most important component of the entire mechanism. The throttle trigger is the element that works in tandem with the switch and the cable. Also, has its own spring that moves it to the initial position. The switch is a multi-mode stalk that locks the throttle trigger in a certain position and breaks the electrical circuit. Most often, the switch has three main positions: STOP is to stop the engine, I is the operating torque, START is to start the drive.
Common breakdowns of the grass trimmer throttle handle Various breakdowns can occur during use of the handle. Their causes are connected with: low-quality components, improper use, heavy loads, inappropriate storage conditions, constant influence of various negative factors. Breakage nature: the throttle lever or a blocker burst; contacts oxidized; cable torn off; housing damaged; fixing bolts lost; locking springs burst; working stroke of the switch is difficult, etc. You can repair the damage at home. The main thing is to follow the exact sequence and to remember the position of each part in the mechanism.