How to Disassemble a Motor From a Lawn Mower
Creating a beautiful lawn and maintaining it in order is not an easy task. And to make it easier, you need a reliable assistant – a lawn mower. There are many good and different models on sale. And although everyone has the same purpose, in a number of parameters they differ from each other. Let’s try to figure them out.
What are lawn mowers?
By the way of moving lawn mowing machines are divided into:
- Manual (trimmers) that are held in hand when mowing,
- Wheeled hand, which you need to carry on the lawn,
By type of drive motor distinguish mechanical, gasoline and electric lawn mowers.
Mechanical Wheel Mowers easy to operate, it does not need electricity or gasoline, but significant muscular effort is needed. They are environmentally friendly, silent and allow you to adjust the height of mowing the grass. The cutting mechanism is a cylindrical knife driven by wheels. Such a tool is good for caring for a young lawn, as the low speed of rotation of the knife prevents pulling out grass with a fragile root system.
Mechanical Wheel Mower
And we will consider gasoline and electric lawn mowers below.
Hand Lawn Mowers (trimmers) fit for regular lawn mowing in a small area even with an uneven surface, as they can mow at any angle. The trimmer is a holder bar, at the lower end of which is a cutting device with fishing line. And with high power – additionally with a circular knife. The mower hangs on a belt on the operator’s shoulder, literally making it easier for him to work.
Trimmer can be equipped electric or gasoline engine. Electric is located on the lower or upper end of the rod, and gasoline – only on the upper.
A protective cover limits the mowing edge and protects the legs of the mower from injury. During operation, the left hand holds the handle of the bar (adjusting, if necessary, the height of mowing the grass), and the right hand holds the handle with the engine control button.
The main advantage of trimmers – the ability to mow grass in uneven areas and close to bushes and trees. But maintain the same mowing height at the same time will not work.
The electric trimmer is powered by a household power outlet. To his merits can include:
- Light weight
- Environmental friendliness (there are no exhaust gases and noise).
Disadvantages of the electric trimmer:
- Binding to a network (outlet),
- The presence of a stable voltage,
- Forever disturbing cable on the lawn
- Low power.
And the cable itself has a limited length: you can’t squint far from home.
Battery Trimmer – the same as the electric one, but the engine does not work from the outlet, so you can mow at any distance from the house. This is his basic convenience. However, the mowing area is determined by the capacity of the battery.
The gas trimmer is designed to work in large areas. Therefore, it is especially in demand by summer residents, and owners of country estates, and workers in urban utilities. However, working with it requires some preparation.
This type of lawn mower is distinguished by an enviable mobility, increased power and practicality. It can be used for mowing not only lawn grass, but also weeds and bushes. And professional models are able to cut stems up to one and a half centimeters thick.
However, even with a small fuel tank, such an assembly:
- Weighs quite a lot,
- Requires a mixture of gasoline with oil,
- Pollutes the environment with exhaust fumes,
- Makes a noise.
But it can work in any weatherat.
The convenience of mowing grass with a trimmer is determined by several points, and one of them is the location of the engine.
Trimmers engine bottom on sale a lot. Most often they rechargeable low power. They overheat quickly, so they require frequent interruptions in work. Protection against moisture and mechanical stress is poor. They cannot work on morning dew and immediately after rain, otherwise a short circuit may occur.
Trimmers engine top more practical, more balanced and more powerful, require less mowing effort, and therefore more comfortable in operation. They have good cooling (less overheating), and, therefore, greater performance.
Engine Top Trimmer
Among the trimmers with an upper engine, I especially want to highlight knapsacks. Their engines are secured behind their backs (like a schoolbag), which significantly reduces the load on the hands and much less restricts movement.
Knapsack petrol trimmer
A nice trimmer option is anti-vibration system. It allows you to reduce the vibration load on the shoulders and hands, protects the arms and back of the mower.
Powerful gas trimmers to reduce the burden on the hands equipped with ergonomic handle, similar to a bicycle wheel. On the right handle are buttons to control the operation of the tool. When buying a trimmer, make sure that the handle and button layout on it are comfortable for you.
Comfortable bicycle handle
A reliable and simple tool for cutting grass in the garden – a lawn mower, is extremely popular. However, it may break. Repair required. As a rule, repairs to electric lawnmowers are carried out at service centers.
Video: How to Disassemble a Motor From a Lawn Mower
In order not to transport a sufficiently voluminous apparatus to the workshop, a number of malfunctions can be eliminated with your own hands.
Types of malfunctions of electric mowers
Why don’t lawn mowers start?
To answer the question, you need to understand that all breakdowns are divided into mechanical and electrical. The first include malfunctions:
The second – everything related to the engine, whether it is electric or gasoline.
It is not difficult to repair dull knives on their own, since they are removable and can be sharpened with ordinary emery, withstanding a sharpening angle of 30 degrees. In case of malfunctions of the remaining parts cases, wheels, handles they will also need repair or replacement.
In battery devices, battery failure is added to this problem. It is more difficult to cope with the repair of a lawn mower equipped with a motor, i.E. Gasoline and electric lawn mower.
In the first case, the problem of overheating and overload, as well as a malfunction in the oil and fuel supply circuit, is added to possible breakdowns. In electrical failure, it can also be caused by overheating or overload, since not all models are equipped with protection.
It is necessary to cool the electric motor by disconnecting it from the power supply and replace the filter. In the future, in order to avoid repair of the electrical apparatus, it must be cleaned at least once every three months.
The appearance of extraneous noise or smell indicates that repair of the electric lawn mower is necessary. Not everyone will do it with their own hands, because it will be necessary to replace the drive.
The electric mower does not start or stalls
Sooner or later, many are faced with the failure of the lawn mower. This happens, as a rule, after 3-4 years of active use or after the device was stored in an unheated room in the winter.
A lawn mower fails if:
- Does not start;
- The mower stalls shortly after it starts up;
- Engine does not work at full power or intermittently
Problems with the engine arise over time in all devices, regardless of whether a simple "Chinese" or an expensive "Japanese" stand on it. The moment is unpleasant, but you should not be upset, as there is no need to rush to the service center. You can try to repair yourself.
How to identify the cause of the breakdown?
Repair must begin, guided by the principle of "from simple to complex", i.E. Repair is recommended to start by checking for gas in the tank. If the gasoline engine stops after wintering, replace the fuel.
After all, fuel, unfortunately, is not always of decent quality. Therefore, during prolonged inactivity of the device, it may delaminate or form a precipitate. And motors are sometimes very sensitive to fuel quality.
If there is no doubt as the latter, but the mower does not start, it is necessary to check the spark by removing the wire with the cap from the candle, unscrewing it with the key supplied in the kit.
Attach a candle to a clean metal surface (without paint) of the engine, first having thrown a cap on it, and asking someone to pull the starter.
If an unstable and weak spark appears, the candle will need to be cleaned with a file or sandpaper.
Another problem that can be easily repaired is a clogged fuel hose. They check this by disconnecting it: if the fuel does not flow, then the filter or the saloon is clogged. The filter will have to be replaced, the saloon can be cleaned with a needle.
Well, if after that the mower will work. However, the cause of the malfunction in 90% of cases lies in another – failure of the carburetor, which will need repairs. You can handle the repair with enough experience. In its absence, you will need the help of a service center.
How to clean the carburetor?
Begin by checking that there are no open sources of fire nearby. Do not carry out repairs indoors. This is fraught with a gas leak.
Unscrew the screws with a flat screwdriver to remove the plastic cover of the air filter from the motor. Check the clogged filter, remove it with a vacuum cleaner or replace it with a new one (if the condition is unsatisfactory).
You must also remove the inner filter cover, which is located under the cover. This, having unscrewed the bolts, is easier to do with a ring wrench. An air hose is attached to its inside, which will also have to be removed.
Finally, we got to the carburetor of the device, which can be dismantled. Having disconnected the fuel hose going to it from the tank, i.E. Having removed the clamp, the hose is turned, trying to remove it from the nozzle. Do the work carefully. After all, if there is fuel in the tank, it will certainly spill.
The carburetor is mounted on the engine with two bolts, for unscrewing of which a coupling head is required. Unscrewing the second bolt, try not to drop the carburetor, so as not to damage the spring suspension.
In the next step, the return spring is removed. It is more convenient to carry out the operation from the side where it is attached to the motor. Now you can remove the cable responsible for the position of the flapper by gently turning the carburetor counterclockwise.
After removing the carburetor, unscrew the bolt that secures the fuel chamber cap.
Cleaning is carried out with a special liquid or WD-40 and a copper wire, from which the insulation is stripped.
Finally, you can remove the plastic float located under the lid of the chamber, which regulates the level of gasoline, for which the hairpin is first removed.
The camera must be cleaned of plaque. The inside of the carburetor is abundantly moistened with WD-40 (or an analog), wiped dry. After repeating the operation several times, they clean the fuel channels of the copper core and purge them, since their pollution is the main reason why the engine stalls or does not start.
Having done all the steps described, assemble the carburetor in the reverse order.
Having established it in place, having connected a hose, air is expelled from the fuel chamber. On this repair is completed.
After the described manipulations, the equipment will start up easily and work stably.
Faults in Electric Lawnmowers
If the electric mower is silent, the cause may be a blackout and a break in the cord. To check if there is current in the network, use another electric device plugged into the outlet. The cord must be inspected and replaced when a break is detected. Disconnect it with a hexagon, and check for an open with a multimeter.
As in the case with gasoline lawnmowers, the cause of a non-functioning electric motor may be overheating and overload (blocking the element with a foreign object). The troubleshooting procedure is the same as described above.
Repair malfunctions of an electric mower
Longer grass wound around them can lead to jamming of knives. For repair, you need to disconnect the device from the network and turn the cylinder in the opposite direction.
If the electrical device is silent, the drive belt breaks as a result of wear and requires repair: it can be stretched or torn off. This means that you cannot do without replacement, for which you need to remove the protective cover.
The new belt is first installed on the small gear of the electric apparatus, then put on a large pulley, and turning it.
To replace the power cable of this electrical device, it is necessary to disconnect the device from power and unscrew the cover.
To disconnect the cord, insert the hex wrench into the hole with the wires, releasing the clamp.
The new power cord is installed in the reverse order.
The reason may also lie in the faulty power switch, which is simply replaced with a new one.
Repair an unexpectedly stopped electric motor
If the engine worked, but suddenly stalled, you need to check the crankshaft and piston – maybe they are stuck. This happens due to the lack of oil in the crankcase. With this breakdown, it is better to contact specialists, as in the case when the electric motor of the lawn mower requires repair.
Video: Lawnmower Repair
For trouble-free operation of the lawn mower, the owner must carry out its regular maintenance after the end of the working season, i.E. Before its placement in winter storage. It will cost less than repairing or buying a new electrical device.
Among the main measures ensuring the reliable operation of the electric mower is its cleanliness. Mowed grass accumulated under the deck causes erosion of metal parts. A compressor or blower will help remove trash weed residues.
The electric motor of the mower is air-cooled, therefore it also requires keeping it clean, which is the key to effective functioning. A soft brush and compressed air are suitable for cleaning cooling fins.
If you have some experience, it’s easy to repair the mowers yourself. The video below will help with this.
Where to repair a lawn mower?
If the owner of the electric mower does not have sufficient knowledge, repair of your favorite equipment that allows you to maintain the proper area around the house will help make service centers, learn more about which you can on the sites: