The walk-behind tractor will not start: reasons, how to repair it correctly

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Two-wheeled, mechanical devices of this type, such as a walk-behind tractor or cultivator, are in great demand among farmers, gardeners and cultivators. They minimize human physical labor and help cultivate the soil, remove grass or snow, and transport small loads.

Like any other mechanical unit, a walk-behind tractor can fail and cause a lot of inconvenience to the owner. Careful care of the device and following all operating rules specified in the instructions for use can minimize the likelihood of breakdown. However, no matter how high-quality the walk-behind tractor is, there are parts and elements that become unusable before others. And such an element is the engine.

The walk-behind tractor fails for certain reasons

Preparing the walk-behind tractor for start-up

In the instructions, manufacturers always indicate how to start the walk-behind tractor correctly. However, not everyone wants to waste time reading long pieces of paper and start work without familiarizing themselves with the operating rules. This is fraught with serious damage. It will not be possible to return equipment that was used for other purposes or broken due to the fault of the owner under warranty. If you never manage to start the engine even after several attempts, the reason may not be a bad part.

To make sure that the walk-behind tractor engine or starting system is faulty, you must try to turn it on, following the instructions exactly. If the reason turns out to be incorrect actions, there will be no need to contact for repairs. Sometimes it happens that the MB does not start and immediately stalls due to a manufacturing defect. In this case, you can safely go to the guarantee center to process a return. When communicating with an employee, it is important to inform that everything was done according to the instructions and a breakdown could not have occurred due to the fault of the owner.

To start the walk-behind tractor:

Check the oil level, even if it was filled just a day ago. Sometimes sellers convince you that the required amount of liquid has already been poured into the tank. You can’t trust words, because... An attempt to start a walk-behind tractor without oil will lead to breakdown and will not be accepted under warranty.
Fill with fuel. The method for opening the tank varies depending on the model, so you need to read the instructions. For some types of engines, gasoline must be mixed with oil. The proportions are also indicated in the technical book.
Open the petrol tap. Before doing this, you must move the pump lever to the “Start” position. The name varies depending on the manufacturer.
Pump fuel from the tank using the starter and turn on the ignition. Then you need to pull the starter and move the choke lever to the “Operation” mode. If everything is done correctly, the walk-behind tractor will start.

The described scheme of action is relevant for a gasoline engine without an electric starter, for example the Lifan model. To start a diesel walk-behind tractor, you will have to spend more time. The main problem of such equipment is its instability to frost. When the outside temperature drops, the fuel freezes, so the MB has to be warmed up before starting. The first attempt to turn on may fail if you do not bleed the system with the starter, because Everything inside is airy. Then pump the decompressor several times. Some models indicate the exact time of such preparation. Usually it is enough to do this 5-6 times, and then pull it to the starting position. If all the steps are completed correctly, to start the walk-behind tractor, just press the decompressor and turn on the starter.

Attention!

If it was not possible to clean the air-filled system by bleeding the starter, you can unscrew the fuel valve and loosen all the supply connecting elements one by one. When the fuel flows out, everything must be returned to its original state.

Why does it stall under load?

“The walk-behind tractor stalled during operation” - you can often hear from the mouths of users of these units. The problem may be a malfunction of the fuel supply system or ignition system.

In the first case, check the spark plug. If it is not wet, it means that fuel liquid does not enter the engine cylinder.

Important! Pay attention to the fuel level. The problem could also be with the fuel valve if it is tight.

In this video you will find out why the walk-behind tractor does not develop power: In another case, also make sure that the spark plug is working properly. It shouldn't be wet. Otherwise, you will need to adjust the ignition system again. For this:

remove the cover that protects the ignition system;
rotate the flywheel of the power unit until the contacts open;
determine the distance between such elements of the ignition breaker as the anvil and the hammer;
rotate the flywheel until the piston reaches its highest point;
move the flywheel to a position where the clutch engages;
turn the flywheel again in the opposite direction;
fix the distance between the interrupting contact and the cam at 0.33 mm;
securely fasten the cam and return the protective cover to its place.

Now the motor is working again and it will withstand a stable load.

Important! So that, if such situations arise again, we can promptly begin repairs. Otherwise, parts and main mechanisms will wear out and deteriorate much faster.

In addition to the above, other reasons for failure of the ignition system:

muffler contamination;
incorrect carburetor settings;
mechanical defects in the electrical circuit.

Causes of walk-behind tractor malfunctions and ways to eliminate them

Malfunction: walk-behind tractor stalls under load

If the walk-behind tractor operates normally for a few minutes and then stalls, the cause is usually a failure in the fuel supply or problems in the ignition system.

To find out what is the cause of the malfunction of the walk-behind tractor, you must first check how the fuel is supplied:

take out the spark plug and inspect it - if it is dry, it means there is not enough fuel;
check whether there is enough fuel in the gas tank of the walk-behind tractor;
make sure that the fuel tap is open - a closed tap can be a simple reason that the walk-behind tractor stalls.

If the problem is a malfunction of a gasoline walk-behind tractor in the ignition system, it must be re-adjusted as follows:

remove the cover protecting the ignition system;
turn the engine flywheel until the contacts in the magneto open;
using a feeler gauge, measure the distance from the anvil to the hammer;
turn the flywheel until the piston is compressed to maximum;
turn the flywheel again until a knock appears, indicating the operation of the overrunning clutch;
turn the flywheel in the other direction so that its mark coincides with the mark on the body of the walk-behind tractor;
set the distance from the interrupting contact to the cam to 0.3 mm;
fix the cam with the screw located above the element;
install the cover into the walk-behind tractor body.

If the adjustment is made correctly, the walk-behind tractor will not stall during operation.

Malfunction: the walk-behind tractor operates jerkily, intermittently or at reduced power

If a walk-behind tractor with a gasoline or diesel engine begins to work intermittently, you must immediately turn off the unit and begin troubleshooting.

Continuing to work with a faulty walk-behind tractor means leading it to more serious breakdowns.

What to do:

if the engine of a gasoline walk-behind tractor makes reverse movements, it is necessary to rinse the pump and hoses for supplying fuel and replace the fuel with a higher quality one;
when the walk-behind tractor operates jerkily due to incomplete warming up of the engine, you need to turn off the engine, let it cool completely, start it and warm it up for ten minutes;
if engine power has dropped, you need to check and clean the filter system;
If the ignition magneto wears out, the part must be replaced with a new one.

Malfunction: the walk-behind tractor smokes and stalls, the muffler makes unusual sounds

Possible causes of the malfunction:

too much motor oil in the fuel;
the ignition is set incorrectly;
The fuel in the engine cylinder does not burn completely.

Troubleshooting methods:

if there is excess oil, drain the fuel, flush the fuel pump and hose system, and add new fuel;
check that the gap between the electrodes is set correctly;
if it becomes obvious that the fuel is not completely burned, disassemble the piston system, wash and dry the cylinder, and adjust the carburetor correctly.

Malfunction: the walk-behind tractor starts, but quickly stalls

This malfunction occurs if there are problems with the contacts. What to do:

clean the candle;
check the integrity of the wires;
set the correct distance between the electrodes.

Another reason for the malfunction is that the carburetor is dirty and not enough fuel is supplied. Then you need to replace the fuel and reduce the amount of oil.

Malfunction: the walk-behind tractor stalls when heated

This problem occurs due to excess air entering the carburetor. In case of such a malfunction, the throttle trigger should be squeezed halfway. After starting the engine, you need to give it a good gas before starting work.

If you cannot cope with the malfunctions of the garden walk-behind tractor, the walk-behind tractor stalls, the walk-behind tractor does not start, contact the Alfa-Rost walk-behind tractor repair shop in Rostov-on-Don. We guarantee high-quality repairs of gasoline walk-behind tractors using original components, which are always available in our warehouse.

When your hitherto trouble-free walk-behind tractor begins to act up, it is very annoying. It’s doubly annoying when this happens in a situation where there’s a lot of work and without a walk-behind tractor, it’s like without hands. It seems to start normally, but as soon as you give it a load, it immediately sneezes and stalls. What is the reason for such “betrayal”?

Device and main characteristics

The MB 2 device is very popular these days; it is simply irreplaceable in agriculture. This line of “Compact” walk-behind tractors is produced under the same brand, but has a difference in the engine:

“Neva” with index 2K is equipped with a domestically produced motor, so the price of such a device is much lower than that of foreign analogues;
the second 2B abbreviation indicates that this mini-tractor has an imported engine;
the abbreviation 2C denotes professional elements in the structure of the apparatus that are used for cultivating the land.

The characteristics of the motor should be taken into account when choosing a unit in order to successfully cultivate the required amount of land, be it tens of acres of land or a much larger area. The design of the unit is the following system.

The gear-chain type gearbox is located in a specialized case made of aluminum. Its main task is the high speed of the unit. The device has four forward gears and a pair of reverse gears to carry out the revolution. Its maximum speed is 12 kilometers per hour, so this device can even be used for transporting goods.

To start this small tractor, a motor with a starter is used.
The frame, which acts as a support, has special fasteners, which are located at the back and front and are used as devices for working in weight.
There are certain levers on the steering device that are used during operation of the mini-tractor.
The V-belt type transmission produces the transmission of the clutch assembly from a pulley, a special lever and a V-belt.
The unit is compact and lightweight, even the very heavy version weighs only 97 kilograms. This device can be easily transported anywhere, even in a regular car.

The unit with the abbreviation MB 2 has enormous capabilities; it can perform a large amount of work in agriculture, such as: plowing, cultivation, planting seeds, the process of hilling and weeding between rows and harvesting. Neva produces all this using a large selection of equipment that is used in mounted form, as well as thanks to a large number of innovations. The technical features are presented by the Neva MB 2 apparatus as follows:

It is recommended to refuel the unit only with gasoline;
hardware power 7.6 l. With.;
Russian DM-1K engine, a 4-stroke engine with a single cylinder;

there is an engine with a volume of 317 cubic meters;
the engine is started manually;
air and liquid cooling;
tank volume 2.8 l;
gear, chain editor;
fuel consumption is 2.9 liters per hour.

Other characteristic features are:

during cultivation the grip is 160 cm;
the depth of the earthen area is 16-26 cm;
tractor length 1750 mm, height 1350 mm, width 630 mm;
This mini-tractor can handle about twelve acres per hour.

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Doesn't develop speed

If the engine is in good working order, but the walk-behind tractor does not develop speed, then it is possible:

the air filter is clogged. As a result, not all the air enters the carburetor, and the fuel becomes oversaturated;
low quality fuel fluid;
parts of the ignition system have failed. As mentioned earlier, it is necessary to check the spark plug, correct the gap between the electrodes, and pay attention to the mechanical integrity of the electrical circuit;
if necessary, clean the carburetor and adjust it correctly;
the operation of pistons and cylinders is interconnected with engine power.

Therefore, pay attention to the condition of the pistons and cylinders. Their external damage can significantly reduce the compression value.

For example, cleaning the carburetor may solve the problem

Functional failures

Quite often, among the malfunctions of a walk-behind tractor engine, its unstable operation appears. If the engine idles jerkily, and when you try to add gas it stops altogether, the reason is rooted in a lack of fuel. The screens of the fuel tank, carburetor and pipeline valve should be cleaned. And when problems occur even at idle, it is advisable to check the centrifugal regulator. Often the traction jams there.

Let's assume that the walk-behind tractor simply slows down without jerking. In many cases, this is due to the use of incorrectly tuned, unsuitable or simply badly worn motors. But replacing the power plant is not always wise. Installing a better quality spark plug may help. It is also worth assuming that malfunctions in the operation of the carburetor float in the high-voltage wire may occur.

If the walk-behind tractor engine knocks, you need to inspect the camshaft and crankshaft. This is where the sources of extraneous sounds are mainly located.

Motoblock. It won’t start, what should I do?

In all of the above situations, there is no particular need to carry out major repairs. High-quality diagnosis of problems is very important. It is pointless to try to increase the compression in all modern engines; anyway, the decompressor will not allow this to be done.

Sources:

https://garden-shop.ru/ne-zavoditsya-motoblok-prichiny-kak-zavesti.html https://lkard-lk.ru/avtolyubitelyu/pochemu-motoblok-zavoditsya-i-srazu-glohnet-prichiny https: //stroy-podskazka.ru/motobloki/remont-dvigatelya/

Why does the walk-behind tractor work intermittently?

Despite the wear resistance of the motor part, it is not protected from malfunctions. The appearance of extraneous noises, jerks, and pauses in its operation are the main evidence that it needs urgent diagnosis and repair.

If the cultivator periodically stalls and does not develop speed, this may be due to:

insufficient heating of the motor unit, which operates jerkily. A diesel cultivator, like a gasoline cultivator, requires at least 10 minutes to warm up;
a broken starter cable, which is replaced with a new one instead of repair;
loosening the screw ties between the starter and the motor;
malfunctions of the ratchet, which prevents the normal operation of the starting unit;
failure of the cylinder and pistons;
low-quality gasoline, which is why the engine does not develop speed, does not develop speed and backfires. The situation can be corrected without repairs: after washing the fuel tank and hoses, they simply switch to new fuel.

It also happens that the engine “does not pull”, which can be seen in the overall productivity of the device.

This can be caused by:

clogging of filtration components;
ignition magneto failure.

Other works

Sometimes on Cascade walk-behind tractors the reverse belts need to be replaced. Usually they resort to it if it is impossible to adjust the tension due to severe wear or complete rupture

Important: only those belts that are adapted for a specific model are suitable for replacement. If you supply the wrong components, they will quickly become worn out.

Before replacing, turn off the engine and place it in zero gear.

Remove the insulating casing. Worn belts are removed, and if they are stretched to the limit, they are cut off. After removing the outer pulley, pull the belt onto the remaining pulley inside. Return the part to its place. Carefully check that the belt is not twisted. Put the casing back.

Very often it is necessary to disassemble the trigger mechanism in order to get rid of its malfunctions. Problematic springs do not need to be replaced. Sometimes they simply anneal the tip of the part with torches. Then the desired contour is reproduced with a file. Then the attachment of the spring and drum assembly returns to normal. It is wound onto the drum, the free edge is placed in the slot on the fan housing and the starter drum is centered.

Bend the “antennae”, cock the drum counterclockwise, and release the fully cocked spring. Align the holes of the fan and drum. Insert the starting cord with the handle, tie a knot on the drum; The tension of the released drum is held with the handle. The starting cord is changed in the same way

Important: all this work is easier to do together

If the gear shift knob is broken, remove the rotating head from it, knocking out the pin with a hammer. After unscrewing the screw, remove the bushing and fixing spring. Then remove the remaining parts that interfere with the repair. Only problematic parts of the gearbox are replaced without disassembling the entire device. Do the same when you need to remove the ratchet.

If the shaft has fallen out, then only devices with the appropriate length, diameter, number of teeth and sprockets are purchased for replacement. When the speed controller sticks (or, conversely, is unstable), you need to turn the screw that sets the amount of mixture. As a result, the drop in speed will no longer be sharp, forcing the governor to open the throttle. To reduce the risk of breakdowns, you need to take care of proper maintenance of the walk-behind tractor. Maintenance (MOT) must be carried out every 3 months.

To learn how to repair the decompressor of the Cascade walk-behind tractor, see the following video.

Why does the walk-behind tractor stall when the air damper is open?

The carburetor air damper, in other words “choke”, is necessary for normal engine starting and its further stable operation. If the damper is not adjusted correctly, for example, when it is not completely closed, the engine may not start at all.

One of the common reasons for the incorrect operation of the power unit is air leaks. The reason for this may be depressurization of the carburetor. Check the spark plugs, tighten them if necessary, tighten the connecting bolts. If this does not help, replace the gaskets.

The engine will stall even with the air damper open. You can adjust it until it moves normally, without shifting or snagging.

What to do if the walk-behind tractor engine does not start well when hot?

If the walk-behind tractor does not develop speed when hot, fault diagnosis is carried out in the following sequence:

after several unsuccessful startup attempts, the spark plug is examined as described above. If possible, it is better to immediately replace it with a new one in order to completely eliminate questions on this point;
check the compression and vacuum level in the gas tank;
in a dark room, see if the wiring is sparking;
make sure that when heated, a spark is definitely formed. In addition to the spark plug, a faulty ignition coil can also prevent sparking.

Other causes of malfunction include:

lack or incorrect filling of oil, due to which the triggered oil level sensor blocks the operation of the engine part;
failure of the valve in the fuel tank, which is supposed to maintain gasoline pressure. As a result, its liquid contents do not flow into the carburetor.

Repairing walk-behind tractors, and especially their power plant, is a responsible matter that requires literacy and good dexterity. This applies not only to domestic favorites - the Neva, Cascade, Agro walk-behind tractors, but also imported ones, for example, Honda. But this does not mean that repairing them yourself is impossible. Having a minimum amount of knowledge and following our recommendations above, you can eliminate any malfunctions at home.

Gearbox repair

An increase in extraneous sound in the gearbox also indicates a possible breakdown. This noise can appear when using low quality oil, or when there is simply not enough of it in the gearbox. Such a repair of the walk-behind tractor gearbox will consist of filling in a sufficient amount or replacing it with high-quality oil recommended by the manufacturer. The gearbox may also fail due to wear of the bearings and gears, which would be best replaced. Don't forget to check if the chain tension is good and if there are any oil leaks.

Why does a walk-behind tractor engine have difficulty starting when hot?

The equipment may stall when heated. This problem can be resolved relatively easily. This is often caused by excess air being supplied to the carburetor. It is mixed with gasoline and motor oil and acts as a carburetor coolant. So the temperature of the latter is much lower than the temperature of the walk-behind tractor engine.

To fix the problem, you need to follow a certain algorithm. It is important to start the engine. To do this, perform the following steps:

When starting the engine, the throttle trigger is squeezed halfway;
You should not regularly press the gas trigger, as this may cause the engine to flood;
After starting the engine with the throttle trigger pressed halfway, you need to throttle it thoroughly. Afterwards you can continue working.

Simple actions will prevent an increase in the load on a heated engine; the main elements and systems are not subject to increased wear. The listed methods will allow you to eliminate any malfunctions with the unit. They are equally effective for owners of the following brands: Agro, Honda, Neva, Cascade.

The main problems of the walk-behind tractor engine

It is impossible to give an answer to such a seemingly simple question offhand. There are many reasons why the walk-behind tractor becomes capricious and stalls during operation. Conventionally, they can be divided into several groups:

problems with fuel supply;
malfunction of the engine starting system;
control and automation malfunctions;
problems with the muffler, cooling, etc.

If you notice problems in the operation of the walk-behind tractor, then the main thing you must understand is that there are problems that you can easily fix with your own hands, even if you are not particularly versed in technology, and there are situations when it is impossible to do without a competent specialist and appropriate equipment. The most important task for you, as the owner, is to quickly and correctly determine why your walk-behind tractor is stalling and make the right decision.