Owners of agricultural machinery often encounter various malfunctions. For example, the walk-behind tractor does not start and shoots. To eliminate a breakdown, you first need to determine its cause.
Author of the article
Petr Mikhailovich
I know everything about walk-behind tractors and tractors.
After that, they directly repair the equipment themselves or contact a service center. In this article we will talk about why the walk-behind tractor does not start and how to fix it.
Possible reasons
Does the walk-behind tractor start and stall? Why is this happening? There may be several reasons why a motorcycle does not start when starting. These include:
- damage to the carburetor (in units with a gasoline engine);
- defective ignition and glow devices;
- low level of basic lubricant.
When unusual changes occur in the unit and its operation becomes unstable, the carburetor is checked first. In this essential unit, the formation of the fuel-air mixture (FA) and its dosage for supply to the cylinders of the internal combustion engine (ICE) take place. And if the jets become clogged , the fuel system becomes obstructed, causing the carburetor to lose its ability to guarantee engine starting. In order to eliminate the defect, the fuel line is repaired, which involves a partial analysis of the carburetor, flushing the pump, and purging the nozzles through the fuel fitting.
If the Neva walk-behind tractor does not start, the reasons may also be different. Sometimes the problem is hidden in a malfunction of the spark plugs, which play an important role in starting a carburetor internal combustion engine, or the glow plugs, which ensure the start of a diesel engine. If the igniter devices become wet, which happens due to fuel assemblies being thrown into them, the spark begins to disappear in them. In the absence of sparking, the fuel-air mixture is not ignited and, therefore, the engine cannot be started.
This problem can be solved in various ways:
- carry out minor repairs and replace non-working spark plugs with new ones;
- “burn” the flooded candles and use a flame to clean them of traces of fuel.
The equipment does not start due to a defect in the glow plugs. In a diesel engine, fuel is ignited by contact with hot air, which is heated in the cylinder when compressed by the piston. This occurs without complications if the unit is already heated and the operating temperature in it is maintained by the heated walls of the cylinder. However, in cool weather, the engine is heated using incandescent devices, and if they break, it will not be possible to start the walk-behind tractor.
If, upon inspection of a carburetor engine or diesel engine, no defective spark plugs were identified, but difficulties persist, and are also accompanied by popping noises in the muffler, it is necessary to check the functionality of absolutely all devices responsible for the flammability of fuel. A defect in them may also be a reason that the walk-behind tractor does not start. It is more correct to carry out diagnostics in a service center, where specialists will find the cause of the damage and carry out professional restoration.
Motor vehicles will not start even if there is a lack of lubricant in the engine. Certain modifications are equipped with special control sensors, which, if there is a lack of lubrication, prevent the engine from starting. Particular attention should be paid to those machine variants that do not have such meters. Sooner or later, the degree of the lubricant mixture will reach its limit value, and if it is not compensated to the norm, this will soon lead to wear of the elements and, as a result, to a major overhaul of the engine.
Preparing the walk-behind tractor for start-up
Difficulties with starting the engine can appear not only in used walk-behind tractors and cultivators, but also in new ones just purchased at the shopping center. For this reason, before starting a mini-tractor for the first time, you should read its instructions, then carefully examine all connections and, of course, check the oil level in the internal combustion engine.
You should study the annotation compiled by the manufacturer in order to find out what operating speed the engine has: four-stroke or two-stroke. This is important to understand, since modifications with a two-stroke engine (like the Mole cultivator) require a special combustible mixture, consisting of a mixture of fuel and oil in a special proportion.
Due to the mismatch of fuel, the special equipment will make noise, 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 expensive repairs at a service station. determine whether the fuel is suitable for the motorcycle by the smoke that appears. If the quality of the fuel is poor, it will have a white tone, as happens when the car is tilted too much.
Fuel quality is also important for a diesel walk-behind tractor. It does not start in winter - or it starts, but soon freezes - if summer diesel fuel is poured into its engine, since at low temperatures it begins to thicken and clog the fuel line.
The start-up of motor vehicles both in the summer and in the winter must be carried out in the established order. For example, to start a Krot brand motor cultivator, the following procedure is carried out:
- open the gas tap;
- set the suction motor to the “Choke” state;
- turn off the ignition and turn the engine several times with a manual starter;
- start the motor again and move the motor to the “Run” state.
Conditions often arise when the power apparatus starts easily, but freezes after a couple of seconds. In this case, you should check the permeability of the sump. If the reason is that the tap is clogged, then it is cleaned with gasoline.
Starting a motorcycle with a diesel engine will be somewhat more difficult. Starting a diesel engine begins with “de-airing” the fuel path, that is, by ridding it of air accumulations. For this:
- open the fuel supply valve;
- untwist the connections of the outlet channel until fuel appears;
- twist the connections and blow through all the nozzles.
If after the operations the motor does not function properly, and the special equipment begins to smoke, then the reason is the old lubricant, and it must be completely changed. The unit does not start due to insufficient volume of oil fluid, so do not forget to control this parameter.
Starting a motor cultivator after winter or prolonged downtime also has its own nuances. In order to bring the unit into working position, perform the following manipulations:
- open the gas tap;
- check whether the power is turned on;
- check the presence of lubricant;
- let the gas reach about half way.
Before putting the motorcycle into operation, all connections are checked, including transmission sections, clutch, starting mechanisms, and, if necessary, they are adjusted.
How to start a cultivator - the correct procedure
Often, household equipment does not start because its owner does not know the correct procedure for starting. In this case, you need to carefully re-read the cultivator operating manual. If it is not there, then you need to adhere to the algorithm that is suitable for most models.
To start the motor cultivator, you need to perform the following steps:
- First you need to move the fuel valve lever to the “Open” position;
- Then you need to close the throttle valve;
- After this, the ignition lever will need to be moved to the “Open” position;
- Next, the gas lever needs to be moved slightly to the left;
- Then you need to smoothly pull the starter lever until resistance is felt. Immediately after this, the lever must be returned to its original position and pulled sharply;
- The cultivator engine will start. You need to wait about 2 minutes until the engine warms up. As the internal combustion engine warms up, you should gradually open the throttle valve;
- You can adjust the optimal engine speed using the throttle position adjustment lever.
After completing all of the above steps, the farmer can start using the cultivator. To stop the engine, move the fuel valve lever to the “Off” position.
Starting a gasoline and diesel unit
The equipment is equipped with gasoline or diesel engines. starting a diesel walk-behind tractor and a gasoline machine. For this reason, it is necessary to analyze the factors due to which the unit does not start for each specific type of engine.
Before purchasing a walk-behind tractor , special equipment is prepared. It is necessary to make sure that absolutely all elements are present and to make sure that the mechanisms are securely fastened.
Mechanisms often refuse to work after winter. A long break becomes a prerequisite for the occurrence of problems in the walk-behind tractor systems. Storing in a cool and humid area will cause the following problems:
- oxidation of contacts;
- violation of wiring insulation;
- watering of fuel and oil;
- clogged carburetor jets.
Before starting a new walk-behind tractor, absolutely all connections, clutch cable, reverse and gas are checked. Do not turn on the device if there are clamps or twisting of the harness threads.
During the first start-up, be sure to check the oil level in the crankcase. Lack of lubrication will damage the piston group. The crankshaft spins up to 1400 revolutions per minute at idle. It only takes a couple of seconds to create a scuff mark on the cylinder plane.
Old oil can cause the engine to not run. At the same time, the walk-behind tractor emits white exhaust gases. This begs for an absolute oil change.
It should be taken into account that the mini-tractor does not start easily if there is not enough oil. Keep an eye on this parameter before starting a carburetor and diesel walk-behind tractor. In some modifications, protection is determined by a low level. The device blocks startup and the unit freezes.
It should be remembered that any type of engine requires a specific brand of gasoline. For a two-stroke engine, fuel is prepared separately. The fuel mixture consists of fuel and oil. The number of ingredients is kept in strict balance.
Description
Design, repair and maintenance of the Ugra walk-behind tractor are the most frequently asked questions on specialized forums. In this article we will look at these issues in detail.
Motoblocks of the Ugra brand comply with all European standards and safety approvals; they have proven themselves to be reliable and hardy farmer’s helpers. In conjunction with functional attachments they can be used all year round.
The manufacturer is the Russian enterprise “Kaluga Engine” (“KaDvi”), which produces motors, spare parts for tractors, attachments and walk-behind tractors “Ugra” and “Oka”.
Mechanism repair
Starting a diesel engine after purchase can be difficult. The problem is that air gets into the fuel supply system. If cranking for a long time (with the starter) fails to start, it is necessary to release the air plugs. To do this, open the supply valve and unscrew the connections along the channels. The final point of purging is the injectors.
In order for an internal combustion engine to start , several conditions must be met. Let's list them in order:
- preparation of the mixture;
- delivery of fuel to the cylinder;
- ignition of the mixture;
- release of gases.
Fulfillment of the mentioned conditions ensures the start of any engine.
Difficulty starting
Difficulties during startup indicate a malfunction of components and elements. The success of repair work depends on the accuracy of the diagnostics. If deficiencies are found, they repair the diesel walk-behind tractor. Service and minor repairs can be carried out on your own. You will need a set of keys, a locksmith mechanism and skillful hands.
At the fuel preparation stage, the following incidents are likely:
- a lightweight filter does not let air in;
- the hole in the tank lid is boarded up;
- the fuel supply channel is clogged;
- The carburetor broke down.
After a series of unsuccessful starts, it is advisable to unscrew the spark plug. The working part can be filled with fuel. In this case, we dry the element, then pump the cylinder through the hole. We twist the candle and start it again.
If the candle is dry, it means that fuel is not entering the combustion chamber. Let us perform several operations one by one to restore the supply system:
- drain old gasoline;
- wash the tank;
- clean the special filter from dirt;
- clean the fuel supply hose;
- clean the carburetor jets;
- fill the tank with the cleanest fuel;
- open the tap;
- Clean the breathing channel in the tire.
Do-it-yourself troubleshooting
Success in self-repairing a 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:
- Completely drain the old fuel;
- Thoroughly rinse the fuel tank;
- Clean the air filter from blockages;
- Blow out the fuel supply hose with compressed air;
- Blow out the carburetor jets;
- Fill the tank with fresh gasoline;
- Open the fuel tap;
- Blow out the breathing passage inside the fuel tank cap.
Before restarting, you will need to manually prime the fuel by pressing the fuel pump primer several times. 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 prolonged operation, carbon deposits accumulate on its walls, which must be regularly removed using compressed air.
Ignition system malfunctions
The engine will not start if there is a breakdown in the ignition system. Why is this happening? Sources of interruption may be the generator, high-voltage cable, cap and spark plug. An external inspection is necessary to check the cleanliness of the ignition system elements. Dirt and moisture serve as a prerequisite for high force breakdown on the body. A lack of spark occurs when the cap does not make proper contact with the main electrode of the spark plug.
A weak spark indicates poor spark plug performance. The gap and type of electrodes should be checked. The gap is usually checked with a feeler gauge. As a rule, the figure is 0.8 millimeters. If necessary, remove fumes from metal elements and insulators. It is recommended to change the spark plug.
The condition of the piston category elements affects the readiness of the engine as a whole. They operate in difficult circumstances. Under loading, the rubbing surfaces heat up. The cylinder, valve and rings are responsible for a significant indicator - compression. A low compression ratio in the cylinder will indicate replacement of elements.
It is also necessary to check the intake and exhaust valves. They should be close to the saddles. The muffler is the last point on the gas path. Over time, combustion products are deposited in the walls of the muffler, and the engine freezes. For a standard passage of exhaust gases, it is necessary to clean the walls of carbon deposits from time to time.
Buy gasoline for walk-behind tractors at gas stations. The operating period of the machines directly depends on the properties of the fuel. There is no need to start the walk-behind tractor on bad fuel.
What to do if the Ugra walk-behind tractor does not start
We invite you to familiarize yourself with the reasons that affect the launch of the power plant of the Ugra walk-behind tractor:
- Lack of fuel: fill the fuel tank with gasoline.
- Running out of oil: add oil.
- Problem with spark plugs: smoked - clean and rinse in gasoline; if wet - pump and dry, replace the tip; burnt out - replace the spark plug.
- No spark: adjust the gap between the contacts;
- Problems with the magneto: adjust its position if the blades jam; replace if burned.
- The carburetor of the Ugra walk-behind tractor requires repair: if it is clogged, disassemble and clean it; out of order - replace.
- Filters (air and fuel) are clogged: clean or replace.
