Repair of lawn mowers is carried out taking into account the principle of operation and the causes of damage to the unit. often, the device fails after 3-4 years after active use.
Lawnmower repair is necessary in the following cases:
- the device does not start;
- the unit dies quickly after starting;
- the motor does not work at full power.
Reasons for the malfunction
Reasons for mower failure:
In the first case, you will need to replace the case, handles, knives and wheels for lawn mowers. When the knives are locked, the unit stops mechanically. Such a breakdown is associated with an attempt to mow hard or tall grass. Repair of the mower consists in freeing the cylinder from the stuck grass and scrolling it in the other direction.
When operating a lawn mower with a blunt or damaged knife, the grass mowed unevenly. In this case, the device may vibrate or stop abruptly.
In order for the device to work properly, it is recommended to sharpen the knives with a file (30 ° angle). Otherwise, abrasive tape is used. The gap should be between 2 blades, touching the strip. The device turns on periodically (for 15 seconds). If the knives are sharp, then the strip is removed, the gap is adjustable.
If the knives are not in the correct position, the cylindrical lawnmower makes abrupt and uncontrolled movements. Normally, the gap between the cutting elements should be thinner than a sheet of paper. Otherwise, the clearance is adjusted. It is preliminary recommended that you study the instructions for the device, unplug the plug. With a loose connection, a whistle appears. The device vibrates and rattles. Repairing a lawn mower means adjusting bolted joints.
If the belt breaks or stretches, then it is necessary to replace it. To do this, loosen the screws. Then the pulley moves, the belt is removed. A new part is worn on a small, and then on a large pulley. The gear returns to its original position. The next step is to check the tension of the new belt. Deflection should not exceed 4 mm.
Faulty electrical models
The reasons for the unexpected disconnection of the electric lawn mower are due to a break in the cord or lack of current. In the first case, it is recommended to check the cable for an open. To replace the power cord, you will need to unplug the plug from the outlet, open and remove the switch cover.
Video: Gasoline Lawn Mower Starts And Stalls
Before unscrewing the cable clamp plate? it is necessary to remember the circuit of its connection to the switch. To disconnect the cord, use a hexagon (1 mm diameter). The clamp is released, the conductors are dismantled. A multimeter is used to check the cable for an open. If necessary, install a new cord. In this case, the reverse sequence is observed.
In the second case, it is recommended to connect another device to the mains. Electrical appliances may not work if the fuse in the plug is damaged. To carry out repairs, you will need to disassemble the plug. A screwdriver and a tester are used for this.
Motor problems occur when the mower overheats:
- as a result of long work;
- due to overload (the cutting element is blocked by some object).
In the first case, it is recommended to wait a few minutes for the motor to cool. In the second case, you need to remove the stuck item. The effectiveness of the cooling system depends on the condition of the air filter. A dirty device does not allow air to pass through, which helps turn off the device. Experts advise cleaning and changing the filter once every 3 months (with continuous use of the lawn mower). If the electric motor breaks down, a corresponding smell and noise appear. In this case, you will need to replace the drive.
The design of a gas mower, unlike an electric counterpart, is more complicated. In some cases, the unit cannot be repaired. If the engine does not start or stops immediately, then it is recommended to check the ignition. To do this, you will need to dismantle the candle. A dry candle indicates a problem in the feed system, while a wet candle indicates a carburetor. In such cases, repair work is carried out by professionals.
If there is black soot on the candle, then it is replaced. At the same time, the cause of the mower malfunction is not taken into account (carburetor setting, low-quality fuel). Often in gasoline models, the fuel hose is clogged. If gasoline does not flow, then the saloon is cleaned with a needle, and the fuel filter is replaced with a new analogue.
If the mower does not mow the grass, then check the knives. If necessary, they are replaced with new cutting elements or ground on an emery. In the second case, it is recommended to use safety glasses and thick gloves. You can sharpen mower knives using special tools that are included with the device.
If the knives are blocked by long grass, then it is recommended to turn off the mower. The wooden PAL-KOI scrolls the cylinder (to the other side) until it rotates freely. If the mower does not work as a result of a malfunction of the switch, then it is recommended to check it and replace it with a working analog.
If there is no voltage in the outlet, the shield is checked. Some devices are equipped with thermal protection. When such a system operates, the ventilation grilles are checked for contamination. A soft brush is used to clean them.
Conclusion on the topic
Repair of mechanical mowers is carried out when the cutting elements are dull or damaged. In this case, experts recommend dismounting removable knives on their own. Emery is used to sharpen them. Battery models are replaced if necessary.
Before repairing a lawn mower, the type of motor is determined:
- Electric. the engine is powered by current. The unit shuts down as a result of overheating or overload. Some models do not provide overheating protection. With mechanical damage to the engine, the help of professionals is required.
- Gasoline. the device fails as a result of overheating, overload, breakdown of the oil and fuel supply circuit. Gasoline mowers, unlike electric models, take longer to repair.
To extend the life of the mower, we recommend that you follow the instructions for use.