Despite all the reliability of modern walk-behind tractors, sooner or later they fail, which makes it impossible to start the unit and continue working on the site. We suggest studying the most common breakdowns of agricultural machines, as well as methods for fixing them yourself.

Why the walk-behind tractor won't start - let's understand the reasons

Before the start of the season, both gasoline and diesel walk-behind tractors need preparation. To do this, the owner of the unit must make sure that the design of the unit contains all the parts necessary for operation, and each of them “sits” tightly in its normal place.

Often, many walk-behind tractors equipped with a Subaru engine or engines of other famous brands, refuse to work after a long period of time winter downtime. At the same time, incorrectly chosen storage conditions for an agricultural machine also have an effect - if it has been standing in a cold, damp room, then, most likely, it will not start before the start of spring work. This is due to a number of malfunctions:

• Oxidation of contacts in electrical wiring;
• Violation of the integrity of the wiring insulation;
• Watering of oil and fuel;
• Accumulation of debris in the carburetor jets.

Before starting a walk-behind tractor, its owner must carefully inspect all the connections in the design of the unit. You need to check the movement of the throttle, reverse and clutch cables - it should be soft. If during inspection you find clamps or twisted cables, then you cannot start the walk-behind tractor.

Before starting the walk-behind tractor for the first time, you should check the oil level inside the crankcase. If lubricant composition missing, it will cause severe damage piston group. Judge for yourself: at rotation speed crankshaft at 1400 rpm, a split second will be enough for it to form several burrs on the surface of the cylinder.

Oil left over for the winter is one of the main reasons unstable work unit motor. It is quite simple to make sure that the walk-behind tractor is difficult to start precisely for this reason - after starting for a few seconds from exhaust pipe cars will fall down White smoke, after which the unit will stall.

Don't forget that both diesel and petrol walk-behind tractor Difficult to start due to insufficient oil. Some models of units are equipped with protection according to low level, owners of other cars should independently monitor the volume of oil inside the tank.

Another important factor- this is the gasoline that you use to refuel your walk-behind tractor. If you regularly fill up with fuel of a different brand than that recommended by the car manufacturer, this may also cause the car to not start.

Do-it-yourself troubleshooting

Success in self-repair walk-behind tractor largely depends on how correctly you diagnose the unit. The reasons that the walk-behind tractor does not start may be hidden in the following:

• Due to blockages, air does not pass through the air filter;
• The hole in the fuel tank cap is clogged;
• Debris has accumulated in the fuel supply channels;
• Carburetor failure.

Each of these malfunctions is quite easy and quick to fix with your own hands. If this is not the cause of the breakdown, and the unit still does not start, then you should unscrew the spark plug and check for oil stains on it. If you find oil or thick carbon deposits on the spark plug, the part needs to be cleaned and dried. In addition, the cylinder of the walk-behind tractor will also need drying - to do this, you need to sharply pull out the starter cable several times.

It is often difficult to start a walk-behind tractor due to the lack of fuel in the combustion chamber. In this case, the candle will be completely dry. If this is the cause of the breakdown, then the following measures will need to be taken:

1. Completely drain the old fuel;
2. Thoroughly rinse the fuel tank;
3. Clean the air filter from blockages;
4. Blow out the fuel supply hose compressed air;
5. Blow out the carburetor jets;
6. Fill the tank with fresh gasoline;
7. Open the fuel tap;
8. Blow out the breathing passage inside the fuel tank cap.

Before restart you will need to manually pump up the fuel by pressing the primer several times fuel pump. After starting the engine, be sure to give it time to warm up, after which you can start working with the walk-behind tractor.

If all of the above steps did not help, and the walk-behind tractor still does not start, then check the intake and exhaust valves - if they do not fit tightly to the seats, the parts will need to be adjusted by turning the corresponding screws clockwise.

Also, if the walk-behind tractor does not start, we advise you to pay attention to its muffler - after long work Carbon deposits accumulate on its walls, which must be regularly removed using compressed air.

There is no spark on the walk-behind tractor - let’s look into the problem

Another common reason that a walk-behind tractor will not start is due to a problem with the unit’s ignition system. Malfunctions may be hidden in the cap, magneto, spark plug or high voltage wire agricultural machine.

When inspecting the ignition system, first of all you need to carefully check each part for blockages. If the spark is lost, the reason for this is often moisture or dirt getting on the elements of the ignition system. Also, often an agricultural machine does not start due to the inability to form a spark - the reason for this is poor contact between the central electrode and the spark plug cap.

If you do not find dirt or moisture in the ignition system, and the walk-behind tractor does not start, then be sure to check the integrity of the electrodes and the gap between them. As a rule, a special probe is used for this. Ideally, the gap should be 0.8 mm. If necessary, remove carbon deposits from the insulator and metal elements ignition systems.

If the unit does not start, and none of the above procedures helped, then you will need to replace the spark plug of the walk-behind tractor. The cost of replacement parts is low, but when purchasing, we advise you to give preference to more expensive spark plugs - they will last many times longer than their cheaper counterparts.
All of the methods listed are suitable for repairing motoblocks Krot, Neva MB-1 and MB-2, as well as Cascade, Zubr, Agro and Salyut.

Technological progress has not bypassed farming. For everyone who works with the earth, a huge variety of equipment has appeared on sale, which greatly facilitates work and protects human health.

Walk-behind tractors are universal machines that can cope with any task - from plowing the land to planting plants and harvesting crops. There are a huge number of species on sale, divided among themselves by manufacturers, price category, as well as the type of engine.

In this article we will look at a situation where the Neva walk-behind tractor does not start for some reason. You will eventually be able to identify the cause of the breakdown and quickly fix it.

Differences between gasoline and diesel engines Neva

Motoblocks "Neva" are multifunctional devices that have a lot of advantages. With their help, you can easily cultivate the land, get rid of weeds, plant and dig up plants, remove crops, and mow the grass. And this is not the entire list.

The units are equipped with either diesel or gasoline engine. Launch different types engines differ from each other, so before answering the question why the Neva walk-behind tractor does not start, you need to know all the intricacies of its operation.

Before turning on the equipment, you need to make sure that there are no visible mechanical damage, the package is all assembled, no wires have come loose anywhere, and more. Often engines do not start after winter. If you stored the walk-behind tractor in a damp and cold room, you may eventually find the following damage:

• wire oxidation;
• oil watering;
• violation of wire insulation;
• clogged jets in the carburetor.

When you just bought a walk-behind tractor, you can’t turn it on right away. It is necessary to carefully check all the parts: connections, clutch, throttle and reverse cables. Moreover, you cannot turn it on if there is twisting of the strands of the harnesses.

Even if you are assured that the unit is completely ready for operation, first of all also check the oil level in the crankcase. If there is not enough of it or there is an excess, the engine may simply not start. If your equipment sits for a long time, the oil may deteriorate, which will also cause problems with engine performance. IN in this case just replace it with a new one.

Also keep in mind that each engine runs on different gasoline. A two-stroke engine requires a special mixture of gasoline and oil, and the ratio of ingredients must meet certain standards. A lot also depends on the quality of the fuel. Refuel only at good and proven gas stations.

Methods for repairing Neva walk-behind tractor engines

The problem can occur in either an old engine or a completely new one. However, don't despair. Even a non-professional will be able to find the cause and eliminate it.

Units and mechanisms

Launching a new Neva walk-behind tractor can be very problematic. This is due to the fact that there is air in the system. If the starter fails to turn on, you need to bleed out all the air.

To do this you need to open the supply valve diesel fuel and unscrew all connections along the fuel channel all the way to the injector.

To start the engine internal combustion, you need to do the following:

• prepare the fuel mixture;
• let fuel into the cylinder;
• light the mixture;
• release exhaust gases.

The problem could also be with the spark plug. If it is completely wet, there is too much oil. You need to dry the part, pump the cylinder through the hole and screw the spark plug into place. After that, try to turn on the walk-behind tractor.

If the spark plug is completely dry, then fuel is not entering the ignition chamber. To restore the feed system, you must perform the following steps:

• get rid of old gasoline;
• clean the tank;
• clean dirt from the filter;
• clean and blow out the fuel supply hoses;
• clean the jets in the carburetor;
• add new gasoline;
• open the tap;
• clean the breathing channel in the lid.

Ignition system

Why doesn’t the engine of the Neva walk-behind tractor start? Due to a malfunction in the ignition system. The cause may be the magneto, cap, spark plug or high voltage wire.
Every detail must be inspected. If there is dirt or moisture present, this may be the root cause of the problem. Everything needs to be cleaned and dried.

Another reason is the lack of spark. This is due to bad contact cap and central electrode of the spark plug. The candle may also be the cause weak spark. Check the gap and condition of the electrodes. It is necessary to remove all fumes from all parts and the insulator.

The piston system can also fail. It is necessary to check the condition of each component part. It turns out here huge load, and the rubbing surfaces become very hot.

Check the intake and exhaust valves to ensure they are seated tightly. The last path to diagnosis is the muffler. Combustion products are deposited on the walls of this part. To avoid engine stalling, you need to periodically clean the muffler channels.

How to avoid breakdowns of the Neva walk-behind tractor?

Every farmer knows how expensive any equipment is, as well as the repair of parts. Of course, if you have extra money, you can afford to buy new components or even new equipment.

But still worth sticking to simple rules to extend the life of your Neva walk-behind tractor. As mentioned above, before starting work, check all mechanical part for malfunctions.

Also read the instructions before starting work, where it is described point by point what and how to do. Storage plays a big role important role. Moisture can cause corrosion in different parts of the unit. Oil and fuel may simply deteriorate.

If you value your equipment, adhere to the storage rules, and also promptly clean the equipment from contamination when working in the ground, as well as from the accumulation of soot on various parts. Don't forget to check the oil and change it on time. And then your Neva walk-behind tractor will serve for many years, delighting you with its excellent condition.

Perhaps no one will dare to challenge the assertion that working on the land is hard and monotonous work that takes a lot of effort and time. To make their life a little easier, farmers decide to purchase. But, like any other equipment, this “workhorse” requires timely maintenance and repair. And the situation when, after working for some time, the walk-behind tractor either does not start at all, or starts and immediately stalls, is not at all uncommon. ABOUT possible reasons You can find out about such a malfunction from our article.

Why won't the walk-behind tractor start?

So, there is a problem - despite all efforts, the walk-behind tractor flatly refuses to work. You should look for the reason why a gasoline walk-behind tractor does not start in accordance with the following algorithm:

Step 1– check if the ignition is on.

Step 2– check the presence of fuel in the tank.

Step 3– check if the fuel valve is open.

Step 4– check the position air damper. When starting a cold engine, the choke must be closed.

Step 5- check whether fuel enters the carburetor. This can be done as follows: you need to fill the float chamber or disconnect the fuel hose and check whether gasoline flows freely. Difficulty draining may indicate the presence of contaminants on the fuel filter or in the air valve.

Step 6– check the functionality of the ignition system. If the spark plug is dry, it means that gasoline is not entering the cylinder and the carburetor must be disassembled and cleaned. If the spark plug is wet, the walk-behind tractor may not start due to excess fuel mixture. In addition, you should clean the spark plug from carbon deposits and adjust the distance between the electrodes.

Step 7– check the functionality of the electric starter system.

The walk-behind tractor starts and stalls

Now let's figure out what happens if the walk-behind tractor starts up poorly and stalls almost immediately. The most probable cause This lies in the air filter, which is either dirty or has simply expired. First, the filter must be carefully cleaned, and if this does not help, then replaced. Also, this behavior of the walk-behind tractor can be caused low quality fuel, which will have to be replaced with that recommended by the manufacturer. There may also be a malfunction of the ignition system or contamination of the muffler with combustion products.

Question: Motoblock Oka MB lifan engine 7 liters. pp., gasoline. Recently I cultivated a small plot of 20 acres. It warmed it up, everything was as it should be, it started working, the speed was slightly above average, all of a sudden white smoke came out of the exhaust, the walk-behind tractor began to “choke”, stopped, slowed down, the smoke came out, it became normal again. This is not observed at medium speeds, nor at low speeds; the air filter is clean and dry. The day before yesterday it was the same. What could be the reason for the smoke? If the oil level is suddenly elevated, can it cause a problem? What can you do?

Answer: I had this happen a couple of times when I tilted the walk-behind tractor, and if you also have a high oil level, it may well be that you don’t need to tilt it that much. From the crankcase, oil flows directly onto the valves when tilted and into the cylinder. Until it burns out, it smokes and does not smoke. If you tilt it too much, the air filter can flood.

Question: Oka MB walk-behind tractor. Muromsky. 1993. Engine Kaluga 1d1m10. Does not start!! Or rather, it starts very hard, runs poorly (unstable), stalls and won’t start again. The device is very little used. Started and ran just great. This morning they changed it. There is a spark. I changed the spark plug in

different options

(A11, A14, A17), the carburetor removed the soap and blew it out. Useless. Help with advice.

Answer: Try to look at the filter on the tank tap, check the gasoline level in the carburetor, whether the mixture is flowing from the carburetor to the engine. If the spark is normal, it should work after checking and eliminating the problems.

Question: I took the Luch MB-1 walk-behind tractor from my father-in-law. He had it sitting idle for several years. Changed the oil, sealed the gas tank. Started it up without any problems.

Answer: I installed UD-2 on the Oka walk-behind tractor instead of the 1d1m10 engine!

True, the advantage is on the right side, but in the road version it’s good.

Walks with a haymower, a trailer, and a circular saw. Added another pulley for speed. Significantly more power. Rings from a Lada are suitable for the original piston, but in order to install an oil scraper ring, you need to take a steel ring from a Lada (it is thinner) and grind it off to reduce its thickness. then 2 rings in 1 groove - ground off on top, oil scraper on the bottom. (rotate 180 degrees relative to each other). Question: I have a problem with the Oka walk-behind tractor, Neva variety. During operation, the starter starts to squeal and the cord that you use to start the walk-behind tractor comes out. Maybe someone can tell me what the problem is? Answer: Didn’t you clean the starter itself before winter and put grease on the balls? It only squeals if there is a lot of grease on the balls. It can be eliminated by wiping the balls and the places in the ratchet where they are inserted. Once you disassemble the starter, carefully inspect the ratchet. Most likely, you will see marks of hardening on it in those places where the balls rest. These marks on the outside must be very carefully removed using a small piece of sandpaper, flush with the main part. And the squealing will go away. Just don't lubricate the mechanism grease.

or

thick oils

Question: The Oka MB walk-behind walk-behind tractor with a Robin Subaru engine - the speeds go out, the walk-behind tractor without a gearbox switches the speed on the gearbox, how can I fix this?

Answer: The MB-1 has such a switch, a piece of iron on a roller that is dragged to one sprocket or another, depending on the gear. And the position of the roller is fixed with a ball in the groove. Either the spring has weakened and the ball does not hold the roller, or this piece of iron has become broken and is jumping out of the sprockets. Question: There is no spark on the Oka-Neva walk-behind tractor, what could be the problem? Answer: if

new spark plug

Answer: I have had a walk-behind tractor for 15 years now and have always had this problem. You change the oil seal, if you are on a good road with a trailer, it doesn’t leak, but if you go into the garden with cutters, it immediately leaks. The solution was like this, in addition to the gearbox transmission oil
poured about 2 kg of lithol, after a short

After working, the mixture became the same consistency (thicker), and everything stopped flowing. Question: Oka MB walk-behind tractor lifan engine

It works intermittently, I left the fuel in the tank for the winter, now I’m blaming the carburetor, can you tell me anything else? The exhaust seems to be normal, but the carbon deposits on the spark plug are black.

Answer: Try changing the spark plug and adding fresh gasoline. If normal gasoline was poured in, it is unlikely that deposits appeared in the carburetor over the winter, although anything can happen. You need to start with something simple, and then you will disassemble and clean the carburetor.
Question: I have a 6.5 hp Oka walk-behind tractor. with the Subaru engine, it all started when I heated it up one day so that the air filter housing melted. It turned out that the cooling fins were clogged with dry grass from last year during operation. After washing and purging it continued to work normally. then one day it started to lose power as it warmed up. After purging the air filter, the problem was resolved for a short time. the next day it started shooting fire at the muffler, spitting black smoke and stalling, and then it stopped starting altogether.

grabs, spits, sneezes and that’s it. compression is around 10.5, the plug is black. What could be the problem please tell me or at least the direction of further search. By the way, I washed the carburetor and nothing changed. Answer: Most likely rich mixture

, the carburetor is leaking. Question: I got a walk-behind tractor - one of the first. IN this moment

I'm interested in the length of the forward and reverse belts (I can't figure it out), the size of the wheel hub seals, and the drawing of the starter clutch. Answer: Belt brands - Forward travel : A-1213: 1400.

Reverse

Answer: The carburetor may be overfilling. That is, a very rich mixture, to such an extent that drops of fuel falling on the candle extinguish it (flood it).

Pay attention to the fuel consumption when starting (pulling the cord). After half an hour of such twitching, half a liter of 92 gasoline went into obscurity. I couldn’t pinpoint the reason, I just went and bought a new carburetor (I have a K45-PEKAR carburetor). Perhaps the float valve was leaking or the mixture quality jet was clogged. I disassembled the old carburetor into all its parts, blew everything out, cleaned what could be cleaned, reassembled it, I think I should put it on the original engine and see what happened.

Question: The Luch walk-behind tractor is in operation and there is little experience in using it yet. I didn’t look at it when I bought it, but after cultivating the ground with milling cutters I noticed the longitudinal play in the output shaft of the gearbox (the one on which the wheels are placed). The play is about 3mm. Is this a defect or an operating norm?

Answer: This is quite normal.

Question: Tell me how to connect the carburetor rods and the centrifugal regulator? Answer: A wire rod connects the CR lever and throttle valve
. I have a walk-behind tractor manufactured in 1985 - I had to remove all the play in the damper connections. 2. The spring goes from the centrifugal regulator lever to the lever to which the throttle cable fits. 3. loosen the bolt on the axle

Centrifugal regulator, lower the lever down, use a screwdriver to turn the axis of the Centrifugal regulator clockwise until it stops. 4. Tighten the bolt on the axle. This method worked for me - normal gas, maintains speed.
Question: I am asking for advice from experts. Motoblock Kadvi Oka, Subaru engine, 7 l. With. He worked for one season, and during that summer he processed about 8 acres of virgin soil with it. Then it didn't start for a couple of months. In the fall, already at -2-5 degrees, I decided to plow it for the winter. Didn't start, quit, now I need to plow

- Nothing. There is a spark, I cleaned the filter, you remove the gas and it doesn’t catch, add more and it shoots, smoke, explosion, stalls - fresh gasoline - 92.

Answer: Remove the air filter and, with the engine running, block the air with your palm, the engine will stall. Do this several times. In general, most often there are 2 problems: spark plugs and old gasoline.
flaps. Yes, and when warming up the speed has to be set above average. And here’s what’s interesting - the candle is very clean, without soot.

Previously, when the engine was working normally, the spark plug was black from soot, but the engine was at least okay. Answer: Lean mixture
, because the spark plug is clean and warms up with the air damper closed, there are two reasons, air leaks, or the main jet is clogged. If it stalled at idle, you could choke the air with the idle speed mixture quality screw, but this adjustment is not enough affects engine performance high speed
. The fuel nozzle, emulsion tube, and air nozzle are responsible for operation at high speeds (nothing can be adjusted here, only by replacing other nozzles with other holes), if the tube and air nozzle are clogged, then the mixture would be rich, and the spark plug would be in soot But here we must make a reservation: the emulsion tube is also a sprayer, and the hole at its tip may be clogged, which will also greatly deplete the mixture.

Remove the carburetor, unscrew the fuel jet, remove the emulsion

tube, clean it with a copper wire, but before that, I recommended soaking the carburetor, after unscrewing everything plastic and rubber, in acetone for several hours. Question: can you tell me about the 1d1m10 engine? 1. Ignition (repair and interchangeability). 2. Overhaul (wear of the cylinder-piston group - where the numbers of the piston and block, timing belt, crank mechanism are written). 3. Muffler and carburetor - repair, advice and interchangeability).
Answer: The ignition is not adjustable. The gap is set and the marks on the crankshaft and camshaft gears are aligned. (True, I had to shift it by one tooth; it was clearly a manufacturing defect.) To check the cylinder, you need to take a new one piston ring, insert it into the cylinder to a depth of 30mm

Question: I recently purchased an Oka 6.5 hp walk-behind tractor. No experience working on such units. I started to slowly roll it in. We still have waist-deep snow, so for now I'm riding on a cart. On the first higher gear it starts normally, it just goes too quietly, but when starting off on the second
increased, a strong crunching sound is heard. And then it drives normally, without excessive noise. Is this a malfunction, or is this how it should be?
Let me add, I travel without any cargo, with an empty cart. And also, to improve cross-country ability, I attached a pair of discs from collapsible ones to the wheel rims

sports weights. I would like to ask, who loads the walk-behind tractor with what to improve the grip of the wheels on the road?

Answer: Most likely, you simply do not turn on the transmission. There are no synchronizers in the box. You need to turn it on on the spot to understand when the transmission began. If it doesn’t melt, you need to move the pulley a little with your hand to turn it on. Question: Tell me, the Oka walk-behind tractor has 6.5 hp, when working from the gearbox pulley mounting shaft (red arrow) it slightly scatters oil on inner side

this same pulley, is this normal or does it need to be treated? Black smudges are after 4 hours of operation.

Answer: This is normal, not critical for MB1 gearboxes.

Question: Can you tell me that the oil in the engine of the Luch walk-behind tractor is driven through the valve box itself. What could be the reason?

Answer: If I understand correctly, it drives through the breather. Through the tube from the block, where the valves are to the carburetor (filter), I suspect that the rings and piston are worn out. From the combustion chamber, during compression, gases knock out oil vapors from the crankcase. Question: The Oka-Neva MB-1 walk-behind tractor with a Lifan engine throws oil through the muffler, blue exhaust - oil scraper ring

has the end come?

I worked for two months.
Answer: Maybe you tilted it towards the carburetor too much?

Oil may have gotten into the air filter. Open it and take a look. Nothing could wear out in 2 months!. you will have to buy a new plate, but there is no need to disassemble the engine. It is enough to remove the breather cover (there are valves behind it) and the block head. The plate is very primitive, even without crackers.

Very easy to install.

Question: Tell me, the center-to-center distance of the engine connecting rod is 1d1m10. My connecting rod was so broken and bent that I can’t measure it accurately. I want to make a connecting rod from D16T with liners.

Answer: The center-to-center distance of the engine connecting rod 1d1m10 is 105mm.

Question: who can help with gear shifts on the Luch walk-behind tractor? The key that switches gears has fallen out. Has anyone encountered this? Answer: I threw the ball

suitable size

into the hole where the M6 ​​bolt is screwed in and tighten the bolt from the top so that the ball does not spontaneously jump out of the groove. I need to switch, I unscrewed the bolt and switched, then screwed it back. There is no need to switch frequently.
Question: On the Oka MB walk-behind tractor, the lifan engine stalls. The candle is black and smoky, but dry. What kind of malfunction? Answer: First try working with the gas tank cap open, it may create a vacuum in the system. And only then: 1. Add oil to the engine crankcase until it is full (top thread
filler neck
) level (the ignition interlock sensor may be triggered if there is one).
2. Replace the spark plug with a new one.
3. Replace gasoline.

4. Wash (if foam) or replace (if paper element) the air filter. 5. Check the fuel supply to the carburetor. If that doesn't help, you need to look at the carburetor. Question: I started the Oka-Neva MB-1 walk-behind tractor after winter. He worked for idle speed

After about 15 minutes everything seemed fine. When the engine began to plow, it began to “shoot” at the muffler, then stalled. I started to restart it - it shoots into the muffler, but it works. As soon as you switch the choke to the open position, it stalls. Then it stopped working altogether - it would start after 3 seconds. stalls. I tried to start it with the car removed air filter- it still stalls. After 15 minutes of such exercises, it stopped starting altogether. The next day I changed the spark plug, filled it with fresh gasoline, the oil level is also normal, but the problem is the same: it starts after 3 seconds. stalls. After 3-4 attempts it stops starting altogether. Tell me, what could be the reason? Answer: The mixture is too lean: there is only enough fuel to prepare the mixture together with idle speed, but since practically no mixture flows through the main dispenser, if the air is open and an attempt is made to open the throttle (“gas”) with the speed controller, the engine will stall (the mixture ignited in the combustion chamber will not have enough effort to move the piston in BDC, i.e. transmit torque to the crankshaft). Something similar can happen and if the mixture is too rich in fuel, the engine will simply “choke.” In the first case, the speck (deposits) blocked the main fuel line; there is no way to do this without removing and disassembling the carburetor. For overflow: the needle valve is skewed, the float is jammed or it loses its tightness (which is unlikely).

Question: I have a Luch MB-1 walk-behind tractor. Doesn't pull when plowing. A friend looked and said that the belt was not tensioned. Adjustment on the handle did not bring the desired effect. I moved the platform with the engine forward to the outermost holes. It doesn't idle as it should.

I would like to adjust it to the maximum before plowing. In connection with this, the questions are: Did I do the right thing so far by moving forward? Are there any other ways to adjust (other than using the handle and shifting the platform)? Which of the three positions is best to put the belt on the drive pulley and which of the two positions on the large one? (As I understand it, traction also depends on this).

Answer: if the MB is not new, it does not hurt to look at the development of the stream on the engine pulley. Question: I have an Oka-Neva MB-1 walk-behind tractor with our engine. I have been using it since 2001. V Last year oil gets into the engine, the spark plug clogs after five minutes of operation, it stalls when the gas increases, there is play in the intake valve, under
valve cover

everything is covered in soot. What to do, what should I change? Answer: Refit the head, change the valves. But this is not an easy matter, you need special tool

________________________________________________________________________

. And the service life of the connecting rod and piston group is decent - in general, a complete cap engine repair, in most cases it is simply not profitable - a new internal combustion engine is cheaper and more reliable.

Owners of walk-behind tractors and cultivators sooner or later face

typical problem

• damage to the carburetor (in walk-behind tractors with a gasoline engine);
• malfunction of ignition/glow devices;
• low lubrication level.

When strange changes appear in a motor cultivator and its operation becomes unstable, the carburetor is checked first. In that important node education occurs fuel-air mixture(FA) and dosing it for supply to the cylinders of an internal combustion engine (ICE). And if the jets become clogged, an obstruction occurs in the fuel system, as a result of which the carburetor loses its ability to start the engine. To eliminate the malfunction, the fuel line is repaired, which involves partially disassembling the carburetor, flushing the pump, and blowing the nozzles through the fuel fitting.

Sometimes the reason that the walk-behind tractor does not start lies in the malfunction of the spark plugs, which play an important role in starting carburetor internal combustion engine, or glow plugs that ensure the start of a diesel engine. If the igniter devices become wet, which happens due to fuel assemblies being thrown into them, then the spark begins to disappear on them. In the absence of sparking, the fuel-air mixture does not ignite, and therefore the engine cannot start. This problem can be solved in different ways:

• make minor repairs and replace non-working spark plugs with new ones;
• “burn” the flooded candles and use fire to clean them of traces of gasoline.

Motorized equipment does not start due to damage to the glow plugs. In a diesel engine, fuel ignition occurs from contact with hot air, which is heated in the cylinder by compression by the piston. This happens without problems when the diesel engine has already warmed up and operating temperature it supports the heated cylinder walls. But in cold weather, and especially in winter, the engine is heated up using incandescent devices and if they fail, it will not be possible to start the walk-behind tractor.

If upon examination carburetor engine or a diesel engine, no defective spark plugs were identified, but the problems remained, and are also accompanied by popping noises in the muffler, you should check the functionality of all devices responsible for the flammability of the fuel. A malfunction in them can also be the reason that the walk-behind tractor does not start. It is better to carry out diagnostics at a service center, where professionals will find the cause of the damage and competently carry out repairs.

The motorcycle will not start even when insufficient level lubricating fluid in the engine. Some models are equipped with special control sensors, which, in the event of a lack of lubrication, prevent the engine from starting. Special attention should be given to those variants of the car that do not have such sensors. Sooner or later level lubricant mixture will reach a critical value and if it is not replenished to normal, this will soon lead to wear of parts and, as a consequence, to major renovation engine.

Preparing the walk-behind tractor for start-up

Problems with starting the engine can occur not only with used walk-behind tractors and cultivators, but also with new ones just purchased at the store. Therefore, before starting the walk-behind tractor for the first time, be it Cascade, Neva, Mole, Bison, Centaur, you need to read its operating manual, then carefully examine all connections and, of course, check the oil level in the internal combustion engine.

It is necessary to study the instructions compiled by the manufacturer, at least in order to find out what operating cycle the engine has: four-stroke (like Forte, Centaur, Lifan, Bison) or two-stroke. This is important to know, because for models with two-stroke engine(like the Mole cultivator) you need a special combustible mixture consisting of gasoline and oil in a certain proportion. Due to the fuel mismatch, the equipment will stall, and the spark plugs and fuel line may also be damaged, which can lead to fuel pump failure - and this is a direct path to failure. expensive repairs at the service station. You can determine whether the fuel is suitable for a motorcycle by looking at the smoke. If the quality of gasoline is poor, it will have White color, as happens when the machine is tilted strongly.

Fuel quality is also important for diesel walk-behind tractor. It does not start in winter, or it starts but soon stalls if its engine is flooded with summer diesel fuel, because at low temperatures it begins to thicken and clog the fuel line.

Starting up motor vehicles, both in summer and winter, must be carried out in a certain sequence. For example, to start a Krot brand motor cultivator, the following procedure is carried out:

• open the gas tap;
• put the choke lever in the “Choke” position;
• turn off the ignition and crank the engine several times using the manual starter;
• restart the engine and move the lever to the “Run” position.

Situations often arise when power unit It starts easily, but after a few seconds it stalls. In this case, it is necessary to check the permeability of the sump; perhaps the reason is that the tap is clogged - then it is cleaned with gasoline.

Start the motorcycle with diesel engine(such as Bison, Cascade, Centaur, Neva) will be somewhat more difficult than Krota. Starting a diesel engine begins with “de-airing” the fuel line, that is, by freeing it from air accumulations. For this:

• open the fuel supply valve;
• untwist the connections of the fuel outlet channel until fuel appears;
• tighten the connections and bleed the nozzles.

If, after these steps, the engine does not function properly and the equipment begins to emit white smoke, the reason is the old lubricant and it should be completely replaced. The diesel engine does not start due to insufficient volume oily liquid, so don’t forget to control this parameter.

Starting a motor cultivator after winter or long periods of inactivity also has its own nuances. In order to bring the car to working condition perform the following manipulations:

• open the gas tap;
• check if the power is on;
• check the presence of lubricant;
• give gas until about half way.

And, of course, before starting a motorcycle, be it a Centaur, Cascade, Neva or Zubr, they check all connections, including transmission units, clutch, starting mechanisms and, if necessary, adjust them.

DIY walk-behind tractor repair

Unfortunately, any equipment sometimes breaks down, so its owner needs to be able to troubleshoot problems on his own. Of course, if the car is under warranty, it is better to take it to service center, where specialists will carry out warranty repairs free of charge.

Often, damage to a cultivator or walk-behind tractor occurs due to improper operation - when they fill in with bad fuel, allow heavy loads, or do not replenish the loss of lubricating fluid in time. Then the car begins to stall, stall, pick up speed poorly (especially if it has an electric motor), or even stops starting altogether. But, knowing the structure of the unit and the operating principle of its mechanisms, you can identify the cause of the damage yourself and carry out quality repairs.

Fuel system repair

A breakdown of the fuel system can be confirmed if the engine:

• does not start;
• stalls under load;
• does not function stably at idle speed.

To eliminate the malfunction, first check the condition of all filters, including air and oil. If they are slightly clogged, they are blown with compressed air or washed; if they are heavily contaminated, they are replaced with new ones. Then they disassemble the carburetor, wash the parts with a special cleaner, clean the fuel mixture supply valve, tank and piston system gasoline. After drying, carefully carry out the reverse installation.

After the motor is completely assembled, crank it manually crankshaft- it is important that the piston moves freely and the valves work flawlessly. Then pour in fresh lubricant, start the engine and leave it to idle. Be sure to check the flow of fuel into the cylinder. Perhaps, after such repairs, the cause of the malfunction will be eliminated and the walk-behind tractor will begin to function without interruption.

Ignition system repair

You can judge the breakdown of devices for igniting fuel assemblies by the signs when the engine:

• starts, but stalls at idle;
• does not start even with good fuel supply;
• It works at idle, but with some interruptions.

To find out the reason, first check the condition of the spark plugs: if there is damage to the insulator, replace them. Next, inspect the electrodes and, if necessary, adjust the gap between them. Checking the condition high voltage wires for oxidation of tips and damage to insulation - damaged wires must be replaced with new ones. Without such repairs, the spark may completely disappear or will travel through the insulation, breaking through to the engine body, and will not be able to ignite the fuel assembly.

If at this stage no defect with a spark is detected, then perhaps the reason that the equipment does not start or stalls lies in the generator or coil (for models such as Neva, Cascade, it serves to generate a spark). To check the generator, a measuring device is connected to its terminals. Scroll the starter pulley of the walk-behind tractor and record the readings of the device - they should be in the range of 12-16 W. If the indicators are normal, then the reason is in the ignition coil and after replacing it, you can put a load on the engine. Most likely, after such repairs, its functionality will resume completely.

Transmission repair

The following factors indicate a transmission malfunction:

• the working shaft is motionless, and the output shaft rotates;
• engine speed does not correspond to the working shaft speed;
• the engine seems to be “choking” under the load.

If at least one of the listed reasons appears, immediately check the presence of lubricant in the gearbox. Lubricant it should be normal, since the lubricant prevents “dry” friction of moving parts and prevents them from overheating.

Then the gearbox is disassembled, the gears are inspected, and the chain tension is checked. Whole parts are washed in kerosene, and damaged parts are replaced with new ones. After this, the structure is assembled and care is taken to prevent the gears from misaligning.

Before the assembled gearbox is installed on the walk-behind tractor, the shafts are rotated to make sure that they rotate evenly and without the slightest grinding noise. The gearbox is filled with fresh lubricating fluid, and start the cultivator. If there are no leaks under the body, perform simple actions with a rototiller or mounted loader and check the functionality of the walk-behind tractor. If its functionality is restored, it means that all efforts were not in vain, and repairs and maintenance were carried out correctly.