Do-it-yourself pubert walk-behind tractor engine repair

In detail: do-it-yourself pubert walk-behind tractor engine repair from a real master for the site my.housecope.com.

In this material, we will consider typical malfunctions of a walk-behind tractor engine and how to fix them.

Typically, there are two types of engine faults:

1. The engine will not start.

2. The engine does not work satisfactorily (it does not gain power, it runs intermittently, the engine stops).

If the engine does not start, then in search of malfunctions and their further elimination, you should perform the following steps to identify the causes.

- Checking the presence of fuel in the tank (checking the fuel system)

- Checking the carburetor air damper (when starting a cold engine, the damper must be closed)

- Checking the flow of fuel to the carburetor.

- If there is no fuel entering the cylinder, a dry plug is indicated. Check for the presence of fuel in the fuel tank, fuel flow to the carburetor by removing the fuel hose from the inlet fitting. For the K45 carburetor, press the sinker until the fuel leaks through the drain hole.

- If fuel does not flow to the carburetor, unscrew the fuel cock, disassemble it and clean the filter from dirt.

- When fuel enters the carburetor, but there is no fuel supply to the cylinder, check the operation of the fuel valve and the cleanliness of the jets.

- To check the KMB-5 carburetor, remove it from the engine, drain the gasoline from the float chamber, then supply air through the fuel inlet in the operating position of the carburetor. The air should be easily blown through.

- Repeat the purge with the carburetor turned 180 degrees, in this position the air supply should stop. If the result is the same as described, the fuel valve is working properly.

Video (click to play).

- The fuel level in the float chamber is regulated by the float tongue, the normal fuel level should be 30-35mm.

- After all actions with the carburetor and installing it back, the carburetor should be adjusted.

- It so happens that the engine does not start from excess fuel, this is evidenced by a wet plug. Dry the cylinder and “bleed” the engine with the plug removed, before that, turn off the fuel supply.

- If the plug is dirty with deposits, clean it and check the gap between the electrodes, usually the correct gap is 0.8mm. Next, you should check for the presence of a spark, if there is no spark, then there may be a malfunction in the electrical circuit or a large gap between the ignition coil and the magnetic circuit.

If the engine starts, but does not develop the required power, runs intermittently, stalls, etc., the reasons for this may be the following malfunctions:

- The air filter is dirty, as a result of which there is insufficient air flow to the carburetor.

- Defective ignition system. You should check it, as well as check the candle, the gaps between the electrodes, etc.

- Clogged muffler with combustion products. The muffler should be disassembled for cleaning.

- Dirty carburetor and incorrect setting.

- Low power may be due to wear of the cylinder-piston group. The compression should be 8 atm. You can check the compression by attaching a compression gauge to the spark plug hole, turning the engine shaft with a starter.

Read also, information on how to make a trailer for a walk-behind tractor with your own hands.

If the engine of the walk-behind tractor does not turn off, first of all it is necessary to pay attention to the operation of the shutdown button.It is necessary to disassemble, check and, if necessary, replace or clean the contacts.

Is it possible to repair a motor cultivator with your own hands at home? Many owners of such motor vehicles are faced with the fact that the engine suddenly stalls, systems do not work well, and malfunctions occur.

What is worth doing, entrusting the job to the master, or doing the disassembly of the device yourself?

The first step in the event of a breakdown is to check the warranty.

If there is a warranty card for the product, be sure to contact the seller and report the breakdown.

If it fits under the terms of the warranty, you will be repaired for free.

Cases that are not eligible for warranty service:

The device is out of order after outside interference: disassembly or damage from foreign objects.
The breakdown of the unit has occurred due to improper operation.
The frame or motor of the cultivator was disassembled, there is no warranty sticker.

If you have used your cultivator correctly, and it suddenly fails, then check the warranty period.

In the case when the unit is by no means new, and the warranty period has long expired, you can repair the cultivators yourself, but only if the breakdown is minor. Replacing the engine and other main functional units is very difficult for the user without special skills. In this case, you will have to look for a service center that specializes in gardening equipment.

Most minor breakdowns can be solved by replacing some parts, cleaning internal systems and replacing fluids, but it is better to leave the professional repair of cultivators to the craftsmen.

The following are some situations in which you can repair your cultivator yourself.

Possible malfunctions of the unit can be explained by the fact that some of its parts are simply heavily clogged. Due to pollution, it is the engine that most often suffers. Since the units operate in the field with the presence of a huge amount of dust, sand and earth, the motors for the cultivator quickly become dirty.

It is worth regularly carrying out the following procedures:

checking candles and their condition;
checking, cleaning and replacing filters;
replacement of fuel and oil after a long downtime of the unit;
cleaning the muffler;
cleaning the carburetor.

Of course, this is not a repair of cultivators, but it helps in many cases.

In order not to have to repair the cultivator with your own hands, it is necessary to handle the equipment correctly.

Unlike a walk-behind tractor, the cultivator is more susceptible to various breakdowns if it is used for other purposes.

Here are some small rules for working with this technique:

Do not forget to change the oil. Even if it is of very high quality, over time its properties will disappear, and it does not matter that there is a lot of it.

Do not work at maximum power for a long time, it is very harmful to the engine. Motor vehicles do not have a good cooling system, so overheating has a very destructive effect on it.

The cultivator's tines should be cleaned, lubricated and removed from time to time. If something gets stuck in the work items, serious damage can occur.

Preparation of the cultivator for work is carried out without fail after its long stagnation without work. It is necessary to check all components according to the user manual and fill in new fluid.

A simple repair of cultivators and walk-behind tractors can be done by yourself. Basically, you will need simple manipulations with replacing parts and fluids, cleaning internal parts, and the like. But if you cannot solve the problem on your own, the only way is to go to the service center.

To repair the cultivator engine, as in the following photo, you need to determine the root cause of the problem. There may be several: let's discuss each option.

In cases where the engine of the apparatus does not start at all, perform the following sequence of actions:

Turn on the ignition;
Check the gasoline level;
Open the fuel cock;
Check carefully the air damper of the Texas walk-behind tractor carburetor: it should be tightly closed if you start a cold engine;

The motor of the Mole cultivator does not give power due to such problems:

The air filter is clogged: repairing the cultivator with your own hands will be reduced to cleaning it;
The muffler is clogged: it should be disassembled and washed;
The carburetor of the Mole cultivator is dirty: it needs to be dismantled, cleaned and adjusted.

You will need to repair the cultivator gearbox if its operation is accompanied by increased noise. A similar phenomenon is typical in the case of a lack of oil. Add it to the gearbox of the device, or better, replace it altogether.

Also, noise can arise due to the "loosening" of the fasteners of the nodes: inspect and fix them with your own hands.

In addition, summer residents may face the problem of oil leakage from the gearbox. This can occur due to wear or improper installation of the seals of the bearing units, with poorly fixed covers and deformation of their accompanying gaskets. Replacement and subsequent high-quality installation of oil seals, self-replacement of gaskets and fixing of cover fasteners, as well as high-quality cleaning of the breather will help to eliminate such a leak.

Do not forget to timely change those parts of the Texas gearbox that are more susceptible to wear than others during the operation of equipment of this kind.

Excessive vibration of the device during its operation is typical for those cases when the summer resident has poorly performed the adjustment of the attachments of the attachments. Stop the equipment the minute vibration is noticed and adjust the attachment parts accordingly. If the fasteners are worn out, they will need to be replaced with new ones.

This article described the most common problems that summer residents may face when preparing a cultivator for the new season. You can eliminate them with your own hands without much difficulty, but you need to approach this task responsibly. The video in this article will once again tell you in detail about the features of the repair of cultivators.

one per entry "How to independently repair the cultivator"

Where to find carburetor and valve adjustments texas 532 lili TG

If you often use small agricultural machinery, you have probably encountered various faults in its design more than once. As practice shows, most often farmers are forced to repair the cultivator. Let's look at what exactly is required to eliminate the breakdown that has arisen, and how to repair the unit with your own hands.

The classical design diagram of an agricultural unit consists of certain elements. These include the following nodes:

Fuel system - it consists of a carburetor, a fuel tank equipped with a tap, an air filter and a fuel mixture supply hose;

Manual or electric starter. The second option is typical for professional cultivators. The starter is used to untwist the main shaft by means of a special rope;

Cooling systems - begins to work under the influence of the rotation of the crankshaft and provides cold air through the speed of the flywheel;

Ignition system - generates and supplies a spark in the cultivator structure;

Gas distribution system - supplies fuel to the engine cylinders and allows the release of waste recycled fuel.

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In the event that, when checking the candles, they turned out to be wet, i.e. fuel is supplied normally, but the engine does not start, the problem may be as follows:

Failure of the ignition system:

there is a characteristic carbon deposit on the spark plug electrodes (it is necessary to clean the candles with emery, after which they should be rinsed with gasoline and dried);
the size of the gap between the electrodes does not correspond to that specified by the manufacturer in the engine operating manual (the gap is adjusted by bending the side electrode to the required dimensions);
insulators for spark plugs or high-voltage wiring are damaged (defective plugs and wiring must be replaced);
the STOP button is shorted to ground (for normal engine start, the short circuit must be removed);
contacts in the angles of the candles are broken (contacts should be put in order);
the gap between the magnetic shoe and the starter does not correspond to the standard value (gap adjustment is required);
defects are found on the stator of the ignition system (the stator must be replaced).

Air leaks through the seals of the carburetor, spark plugs, plug and cylinder heads, as well as the carburetor and engine cylinder connections.

If a leak is detected in the connections, it is necessary to tighten the fastening bolts, tighten the spark plugs and check the integrity of the gaskets between the plug heads and the cylinders.

Incomplete closure of the carburetor choke.

To eliminate this problem, it is necessary to ensure free movement of the damper by checking the quality of the drive. If jams are found, they must be eliminated.

Compression and carburetor malfunctions

It so happens that the launch is carried out, but its process is significantly complicated. At the same time, the engine of the walk-behind tractor is extremely unstable and cannot develop power sufficient for normal operation.

The reason for this may be loss of compression, which can be identified by:

soot on the working surfaces of the valves, as well as the seats of the cylinder blocks;
deformation of the intake valve;
wear of the piston rings.

In order to restore compression, you must:

Check the technical condition of the engine timing mechanism, clean the parts contaminated with carbon deposits, and if there are any defects, replace them.
Check the condition of the piston rings and replace defective components.

If, during engine operation, black smoke comes out of the muffler, and an excess of oil is detected on the spark plug electrodes, or they themselves are covered with carbon deposits, this means that:

an oversaturated fuel mixture is fed to the carburetor;
the sealing of the carburetor fuel valve is broken;
the oil scraper ring of the piston is worn out;
the air filter is clogged.

To fix this problem, you should:

adjust the carburetor;
replace the leaky valve;
replace worn piston rings;
clean or replace a defective air filter.

In the event that, when the engine is running, light smoke comes out of the muffler, and the spark plug electrodes are dry and covered with a white coating, this means that a lean fuel mixture enters the carburetor. This problem is eliminated by adjusting the carburetor operation.

Units and components of motors that are installed on agricultural mini-machinery are exposed to significant loads. They can also fail during the operation of the unit, which will very quickly lead to serious failures.

If suspicious noises, jerks and irregularities in the operation of the walk-behind tractor systems are detected, it is very important to immediately turn off the engine, and then let it cool down - only after that it will be possible to fix the problem.

If, during operation, the motor starts to gain momentum on its own, i.e. is "running out", most likely this means that the fastening of the regulator and traction levers is loose. In this case, the user will have to readjust the motor control drive.

Sometimes, when the throttle is fully open, the engine does not accelerate when the throttle is pressed, but on the contrary begins to lose power until it stops completely.This is a clear sign of overheating, so the walk-behind tractor must be turned off and wait until its components have completely cooled down. After that, you should check the oil level in the crankcase, and also check the cleanliness of the ribbed surfaces of the blocks and cylinder heads.

With increased engine loads, it can jam. There may be several reasons for this:

not enough oil in the crankcase;
a nadir formed on the lower head of the connecting rod;
the connecting rod or oil spray is completely out of order.

If the motor of the walk-behind tractor is jammed, it will have to be disassembled and the condition of the main units and components should be checked: faulty, deformed, melted, etc. subject to replacement.

What to do if the motor block motor works intermittently and does not develop the required power? There may be several reasons for this behavior:

Air does not enter the carburetor, which means that the fuel does not burn well - the filter will have to be cleaned or changed.

Fuel residues and combustion products form a thick deposit on the inner walls of the muffler, which must be removed.

In this case, the assembly will have to be removed, disassembled and properly cleaned all of its components. After that, the carburetor must be assembled and properly adjusted.

Wear of the cylinder-piston group.

Temperature and high loads do their job, and even the most durable metal wears out and deforms over time. Such parts should be replaced immediately, otherwise you can pay for this with irreparable damage in the engine itself.

Damaged ratchet housing or ratchet

The presence of this problem is indicated by the lack of movement of the crankshaft when the engine is started. To replace the clutch housing and ratchet, you will have to completely disassemble the starting block.

Loosen the screws securing the starter housing to the engine housing.

If the starter cord does not return to its original position, the starter motor must be adjusted. To do this, the screws are loosened and the position of the knot is set by hand so as to ensure the normal return of the cord.

A fairly common reason for the lack of a return stroke of the starter cord is the failure of the starter spring - it will have to be replaced.

The service life of any equipment is significantly increased by competent maintenance of its main units and components. The promptness of replacing worn-out spare parts is also of great importance. Therefore, in the event of the slightest malfunctions and malfunctions, they should be addressed immediately - as a result, this will prevent much more serious and expensive problems.

Motoblocks are able to significantly facilitate work on a personal plot. This is a compact agricultural machinery with high functionality and versatility. With its help, you can not only loosen the soil, but also carry out basic activities for the care of plants and harvesting.Like any other technique, walk-behind tractors sometimes fail. Fortunately, they have a relatively simple design, and you can even carry out simple repairs with your own hands. To do this, you need to learn how to determine which part of the walk-behind tractor is out of order, and what needs to be done to restore the operation of the equipment. Our article will help you with this, which not only describes the principle of operation of the walk-behind tractor, but also the main causes of equipment malfunction and how to eliminate them.Most of the models consist of the same parts, so you can do the repair of the main components yourself. Image - Do-it-yourself pubert walk-behind tractor engine repair

Figure 1. Standard drawing of a walk-behind tractor

Each walk-behind tractor consists of a base frame, a gasoline or diesel engine, a fuel tank, a rotor for attaching cutters, wheels and a bracket for fixing attachments. The most important component is, of course, the engine, on the successful operation of which the operation of the equipment will depend (Figure 1).In addition, modern models have fuel supply, cooling, ignition and gas distribution systems, and the occurrence of malfunctions in them can also lead to a shutdown of the unit.

The main function of the walk-behind tractor is to loosen the soil using special cutters that are attached to the frame of the device.

Note: Unlike a conventional plow, the cutter does not overturn the soil and prevents soil erosion.

In addition, the technique can be used to loosen row spacings in the process of growing agricultural crops, and special attachments are useful for harvesting. Simple models (cultivators) consist of several wheels and handles that are used to control the machinery. On the handles there are buttons necessary for control. More powerful and modern models are mini tractors without a cab. In this case, control is carried out by buttons and pedals located on the dashboard.

Despite the fact that walk-behind tractors are produced by a wide variety of manufacturers, it is customary to divide all such equipment into types depending on weight and power (Figure 2).

According to this criterion, walk-behind tractors are:

Ultralight - weighing up to 15 kg;
Lightweight (about 40 kg);
Medium - from 45 to 60 kg;
Heavy (over 60 kg).

Figure 2. The main types of machinery and attachments

As a rule, all types of equipment are supplied with an internal combustion engine with a capacity of 1.5 to 10 horsepower. This is necessary in order for even the ultra-light model to successfully cope with loosening the soil in areas with heavy and dense soils.

Since the main part of any technique is the engine, the main number of breakdowns is associated with it (Figure 3). In some cases, poor engine performance may be associated with poor-quality fuel or dirty air filter. There are also cases that the engine does not work properly due to insufficient heating, malfunctions of the ignition system, carburetor or pistons.

Figure 3. Main engine parts

We will try to understand the main types of damage to the walk-behind tractor, which can be eliminated with our own hands. However, if you are not confident in your own abilities or fear that it is impossible to eliminate the malfunction on your own, it is better to contact a specialist.

If the engine does not start when you try to start, there may be a problem with the engine itself or its starting system.

To troubleshoot fuel supply problems, do the following:

Check the spark plugs: if they are dry, there is no fuel entering the engine cylinders. Such a malfunction can occur when blockages form in the gas tank cap, debris gets into the fuel supply system, when the supply valve is closed or the banal lack of gasoline.
Refuel the tank and try to start the engine again.
Check the fuel cock: if closed, it must be repositioned to open.
Clean the fuel tank drain hole.
Drain the gasoline tank, remove the fuel cock and rinse it with clean gasoline.
Remove the connecting hose near the carburetor and blow it out (together with the jets).

If all these manipulations did not help, and the fuel enters the carburetor, but does not enter the cylinder, then the malfunction is in the carburetor and this part must be carefully examined.

A common cause of carburetor malfunction is blockages. In this case, it is enough to disassemble the part, remove the source of pollution and reassemble. The instructions, which are necessarily provided by the manufacturer, will help you with this (Figure 4).

Figure 4. Diagram of the carburetor

The main purpose of all manipulations with the carburetor is to adjust the immersion of the float, which is attached with a bracket to the piston system. It often happens that the bracket is deformed, the float does not sink correctly and the carburetor does not function properly.The bracket is adjusted with an ordinary screwdriver, both with the needle valve open and closed.

After correcting the carburetor, it is recommended to also check the serviceability of the valves. It is necessary to check the tightness of each of them and, if necessary, restore the optimal clearance.

It often happens that during the operation of the walk-behind tractor, extraneous noises appear in its gearbox. As a rule, this is due to an insufficient amount of oil in it, and to eliminate the malfunction, it is enough just to add fluid to the gearbox (Figure 5).

However, if there is enough oil in the gearbox and the noise persists, the brand and grade of oil may not be suitable for your model. In this case, the oil must be completely drained, the system flushed and refilled with new, more suitable oil.

Figure 5. Gearbox diagram

In addition, extraneous noise may be associated with insufficient fixation of the transmission elements. They must be inspected and, if necessary, tightened. It should also be borne in mind that the gearbox elements must be inspected and replaced in a timely manner when the first signs of wear are detected. This way you can avoid more serious repairs in the future.

Engine malfunctions can occur both during start-up and during operation. In this case, it is imperative to check the spark plugs. If they are dry, there is a problem with the fuel supply, and if they are wet, the problem is in the engine itself.

One of the most common startup problems is the failure of the ignition system. To eliminate such a malfunction, first of all, you need to inspect the electrodes of the candles, and remove carbon deposits that could have formed on them with emery. After that, the candles are washed with gasoline and dried. Starting problems can also be related to incorrect electrode spacing. In this case, you just need to carefully bend them to the distance specified by the manufacturer.

In addition, ignition problems can be associated with damaged electrical wiring or spark plug insulators. These items are subject to replacement. Also, the lack of starting the engine may be associated with stator defects. Unfortunately, it is impossible to repair this part on your own and it will simply have to be replaced.

More often than not, the engine shows signs of malfunction directly during operation. This is due to the fact that small agricultural machinery is exposed to heavy loads and requires regular inspection and maintenance.

Note: If the walk-behind tractor began to move in jerks or make extraneous noises, it is imperative to turn it off, let the engine cool down, and only then proceed to the inspection.

Common problems in engine operation are:

An independent set of revolutions by the engine indicates that the governor and linkage levers are loose and need to be readjusted.
When you press the throttle lever, the engine does not pick up speed, but, on the contrary, loses power. This indicates overheating of the motor, so the technician must be turned off and wait until it has completely cooled down.
Interruptions in engine operation can be associated with a clogged air filter or muffler. The equipment must be turned off, cooled and the parts inspected to clean and remove blockages.

In addition, engine malfunctions can be associated with malfunctions in the carburetor or insufficient oil in it. In this case, the part must be disassembled, inspected and filled with new oil.

A walk-behind tractor with a diesel engine is more difficult to repair with your own hands than a gasoline one, since such a motor has a more complex design. As a rule, possible malfunctions and ways to eliminate them on your own are described in the instructions, so we will focus only on the most common ones.

Diesel engine malfunctions can be associated with such problems:

Clogged nozzle: the part must be removed, cleaned and reinstalled.
Weak fuel injection pressure you can also adjust it yourself, using the instructions for the technique.
Engine cranks too easily with starter: this indicates insufficient compression in the cylinder. To eliminate the malfunction, tighten all the nuts on the cylinder one by one and replace the gasket on its head. It is also necessary to inspect the piston rings, and wash or replace them if necessary.

Malfunctioning starter motor can also cause malfunctioning of the engine. Most often, there are situations when the screws securing the starter housing to the engine housing are loosened. In this case, the starter cord will not return to its original position. To fix the problem, loosen the screws and adjust the position of the cord so that it easily returns to its original position (Figure 6).

Figure 6. Scheme for starter repair

In addition, malfunctions can be associated with wear on the starter spring. It is impossible to repair it, so the worn out part just needs to be replaced.

Video (click to play).

If you want to master the practical skills of DIY repair, we recommend watching a video that describes the main causes of equipment malfunction and how to fix them.