How to adjust the nozzle on the power tiller

Repair of a power tiller with your own hands: fault diagnosis

If you follow the rules of operation and undergo maintenance on time, minor breakdowns occur due to manufacturing defects or wear and tear of parts.

Malfunctions of power tillers can affect the following systems of the device:

In a separate group of problems should be put problems associated with failure of attachments. It is recommended that you do maintenance work every year, before the start of the gardening season.

General characteristics of a power tiller

The engine of a power tiller is the main and most important element of its design. At the heart of this type of technology. a 4-stroke gasoline motor. Heavy models have a diesel engine. Power range for customer demanded models: 6-13 л.с.

All modern models have a transmission with a front and a rear speed. The advanced units are equipped with additional overdrive and downdrive. Available gearbox types: pinion, belt, chain.

Wheels with large hooks act as the prime mover. But not always: a low-power motocultivator has no mounts to install additional equipment, so instead of wheels, metal cutters are installed, which process the soil.

Throttle control is by turning throttle trigger with cable control. The ignition system is electronic (a single-axle tractor is started by pressing a button) or mechanical (to start the power unit it is necessary to pull the starter handle).

Typical malfunctions and repair of a power tiller

The table lists the main breakdowns of power tillers and cultivators and ways to fix them.

• Increased wear of gears and bearings;
• Lack of grease in the box;
• Insufficient tightening of assembly fasteners

• Disassemble the gearbox and replace worn parts;
• Fill the transmission with gear oil;
• Check the level of bolts tightening and integrity of sealing layers, if any.

• The air filter is out of order;
• Nozzles or carburetor are dirty;
• Improper gasoline or fuel oil.

• Change the filter;
• Blow out nozzles; disassemble and rinse carburetor, blow out nozzles, soak part in solvent and repeat cleaning;
• Drain old fuel, replace filter components, change spark plugs, blow out the injectors or clean the carburetor. depending on the type of engine.

• The fuel does not correspond to the current temperature regime;
• Nozzles are clogged;
• Low compression in cylinder

• Fill up with fuel of appropriate brand;
• Blow out nozzles;
• To restore normal compression, you need to apply the following set of measures: re-tighten the nuts of the cylinder head, clean or replace the piston rings (depending on the degree of wear), adjust the gap.

• Insufficient cable tension;
• Clutch discs clogged.

• Retighten the cable or replace it with a new one if it has stretched out due to prolonged use;
• Replace clutch disc and damper springs and adjust clearances at the same time.

• Worn gears on one wheel

• Replace worn tire

• Wear of gears in gearbox;
• Worn splined holes in the shafts;
• Worn bearings and circlips.

• Replace unusable parts.

• Cable jam;
• Deformation of clutch discs.

• Replace discs and cable for new ones.

• Insufficient amount of transmission oil fill.

• Add new grease after checking specification.

• Excessive mixture in cylinders;
• Closed choke on cold start.

• Adjust carburetor;
• Re-establish the proper slide position.

This is a checklist for diagnosing the most common problems. For complicated breakdowns, you need to contact a service center. Routine repair of the cultivator should be carried out in April-May, before the start of gardening work. Repairs should include checking fasteners, replacing spark plugs, changing fuel and lubricants.

Answer: The second bearing is right in the “basket” of the clutch. To get to it, the clutch must be removed and disassembled. Loosen the hub clutch bolts and move them closer to the ramp. Then tighten it back up. The control range is very small. For wheel sensors over 800 mm, he developed blade extensions. Easiest. Weld the blade on top.

Q: I bought a 10L Zubr single axle tractor.с., Started it up, started milling a little and happened to notice that there were water droplets on top of the unit while the engine was warming up. No oil in the radiator water; no water in the oil either. Tell me what to do?

Answer: can this water be drained during expansion with the radiator plug? If this is the case, install an expansion tank. However, if the gasket under the radiator is leaking, you must very carefully squeeze the radiator mount. If that doesn’t work, pour liquid radiator sealant into the water. flow will stop

Q: Fuel pump fuel pump is not pumping on the Zubr 12hp diesel, how to fix it?

A: If there is no air in the system, if there is normal flow, the filter is not clogged (leaking from the high pressure fuel pump tube), there may be a stuck rod on the pump rod. Remove it and try to make it out. If this is not possible, it must be disassembled and washed.

Question: tell me how to adjust the valves on a 10hp Zubr engine.

Answer: Loosen the nut on the valve cover and gently tap it to remove it (it may be tight). Now turn the engine so that it is on the compression stroke (both valves are closed, both have clearance). adjust. You have a probe. Outlet to inlet. 0.25, out. 0,30. Do 2 rotations of the crankshaft and check it in that position. Close the cover.

Q: Bison 12L diesel engine.с. Boiling for almost 10-15 minutes, gasket replaced, radiator cleaned. Where the marker is on the side?

A: Check that there is no gasket that has been replaced. Pour water on top and run without stopping as usual. See for yourself (or a helper) if there are bubbles during the first bubble burst, then stop. Maybe after 10-15 minutes it’s not boiling, but a breakthrough of gases when the head deforms when heated? Injection timing just couldn’t get any better. Look at the notch on the MB housing or just unscrew the cap first and then find the TMT through it and find the mark.

Question: tell me, while running, how much oil to pour into the engine in the 8L bison engine block.с.?

Answer: Depending on whether your MB has a motor block, long or short. So leave the MB horizontal and on the stylus. Do not twist the sensor during measurement.

Q: Motorcycle Bison Clutch Problem 10L.с. does not come in, tell me what can happen?

Answer: there could be many reasons. The crank handle (in people with a horn) can just fall off and cause the position of the clutch release rod to change. One or more clutch legs may just be misaligned, the clutch nut on the transmission shaft may not be tightened, etc. Д.

Q: Tell us what are the most common malfunctions and breakdowns of the Zubr NT-105 diesel engine?

Answer: gasket rupture under cylinder head with and without coolant in crankcase. Damage to the fan roller bearing. Clutch pulley bearing failure. The caster shaft is jammed in the sleeve. Worn and broken belts. Refrigerant is leaking from under the radiator gasket. Coolant faucet leaks. Fuel leaking from crack hose. Fuel leaking from tank cap. Light switch is defective or does not work at all. Unscrewing valve adjustment bolts of the Zubr НТ-105-6 power tiller. Leaks in the shaft seals. Clutch bearing collapses. Crankshaft oil seal leaking. Oil leak from air cleaner through rubber seal. Damaged right side engine cover. Brake shaft failure that rotates the brake ring at the reference point. Rubber gasket swells up in the fuel tap, from which fuel flows badly and the engine does not pick up speed and smokes. Pulleys are not in the same plane, obliquely, due to development of holes to mount engine frame to gearbox (initially loose nut tightening). Sheet steel housing is cracked, loose and has steps with horns attached (loosely reinforced and poorly welded). Clutch grooves are broken, through the clutch pulley is not released.

Question: We purchased a Bison NT-105. Before the start and what we do. I know all diesels have a return line for the trimmer from the nozzle, but the diesel does not return to the fuel tank normally, is this for a passing tractor or not?

Subject: Extraction stuck injector. my way

At the request of some clubmates I am creating this thread where I will periodically report successes and failures!

So, I won’t describe history, those who is interesting and don’t know can look it here: http://autoclub-ssangyong.How to remove the stuck injector. my way.php?t=86page=6 starting from post 73, and this thread is also related: http://autoclub-ssangyong.ru/showthread.php?t=2010

So, the task: to get the nozzle without damaging anything and, preferably, without disassembly and removal of the cylinder head. It looks like the injector is 100% stuck! Because a year ago I could not get this 5th nozzle in Karsi, when they kicked out the water from the engine after water hammer, later on during self-repair of the engine on the removed cylinder-head, I also could not get it, but to be honest, I didn’t try so hard, it did not go after soaking. and the hell with it, I left it in the cylinder head, and then I put everything back together. But now the situation is different. need to get it!

So, the first thing you do, wherever you go, in the garage to the garage. In any shop or in an authorized service. everywhere at first they will tell you. it is necessary to soak an injector at least for a week with special liquids! I know Karsi recommends Liqui Moli rust remover with molybdenum, I bought it from them when I changed the 4th nozzle in Karsi about 2 years ago! But in my experience of spraying rusted bolts I like more products Hi Gear (not advertising), therefore, I personally use for soaping now is such a can, is something in the area of 250.

So, first remove the engine cover, my injector is dead so dead, so I also otoedayut its fixture unscrewing mounting bolt foot, disconnect the fuel supply pipe to the injector and the return pipe, as well as separate the electrical connector injector. Then we clean all the space around the nozzle with compressed air, wipe where we can with various rags and actually fill the nozzle well with grease. let it soak! I personally refresh the fluid almost every day. I use a syringe to suck the old fluid out of the well and add the new one. I started soaking 23.07.2014.

Meanwhile, on RomanVT’s advice, Roman decided to begin the process of getting the nozzles out by using a reverse hammer. Constructing: I bought a 1 kg hammer (though I could find something in the garage, but I thought it would be good for nothing. the old ones are all gone nowhere or crumbled, some M14 nuts with pitch 1.5, several M10 nuts in increments of 1.5, some M10 screws. Weld two nuts M14 and M10, screw in a screw, in the middle of the weight. the reverse hammer is ready!

I started to use this hammer to help me soak on Friday 25.07. I used it for about 2.5 hours. no use, next days. fluid replacement. Today, 28.07, I was hammering again for two hours. So far no effect, keep on soaking. About the next steps I will tell in the same topic.

Zirka, single axle tractor: characteristics, adjustment and reviews

Chinese manufacturers have long been developing the Russian market, and in light of recent political and economic events, many buyers have turned away from Western manufacturers in order to save money, opening the way to domestic and Eastern products. over, over the past 10-15 years, the quality of products from the Celestial Empire has increased markedly, thanks to the introduction of new technologies and market requirements. The segment of small agricultural machinery is no exception.

“Zirka”. single axle tractor of good quality from China

Moto-blocks and cultivators are designed to help the average farmer and owners of small cultivated plots ranging in size from a few acres to 2-5 hectares. This technique is especially relevant in small or fractional plots, where the tractor has nowhere to turn, manual control provides mobility and maneuverability, and fuel consumption is much lower. Chinese motor blocks have already gained considerable popularity among Russian consumers, largely due to its low price.

Often users complain about the quality, but given the skill of craftsmen, they compensate the shortcomings of their own handmade parts and modifications. Producers of “Zirka” brand motor blocks offer a wide range of small agricultural equipment, designed for customers with different technical demands and financial capabilities.

You can’t call such equipment cheap, Zirka” power tillers are in the average price segment and have a good price-quality ratio. On the background of the quality and of domestic producers “Zirka” (power tillers) looks favorable, and given the well-established supply of spare parts from China, can compete for consumers in our market.

Wide assortment

What can Chinese manufacturers offer us under the brand ” Zirka”? The single-axle tractor, whose characteristics we are interested in, is already well-tested and popular, so it is worth considering the range of its main parameters. The power of engines of power tillers is various. For countryside plots are quite suitable economical models with gasoline engines from 4 liters. с., and for small farms will be relevant professional models with a diesel engine from 6 liters. с.

It is worth mentioning that the manufacturer produces models with the most powerful engines among analogues. For example, the company model “Zirka” single axle tractor GN-151E, equipped with a diesel engine with 15 “horsepower” on board, it is comparable to small agricultural tractors. Heavy-duty diesel and gasoline units are necessarily equipped with electronic starters to facilitate starting, light and medium models are easily started by a manual starter.

Area of application

The “Zirka” power tillers are designed for the most various volumes of works. Some models can work the soil to a depth of 30 cm, and the width of the working area can be up to 1.4 m, depending on the attachment and the engine capabilities. And when it comes to the size of the area to be farmed, the lightest models have the capacity to farm 1 ha or more, while the more powerful ones have the capacity to farm 2 ha or more.5 ha, but the limits for powerful models are operator’s ability to work, service stops, forward speed and ground cultivation.

For example, GT76D02(E) and GT90D04(E). according to the technical documentation, equipped with 7,6 and 9 hp engines, respectively, are able to cope with milling the area from 0.59 to 1.33 hectares per hour. Do not forget about the functions of transportation, which can be realized by equipping the device with a special cargo trailer. Zirka” motorcycles are capable of carrying from 250 kg to one and a half tons of cargo at a speed of up to 15 km/h.

Technical features

The Zirka” light and medium-sized power tillers are fitted with active air cooling system, but water-cooled models are also available. As a coolant of such systems can be used special antifreeze or water, but it is necessary to control its level during the operation. Water must be flushed out after work during the cold season.

Transmission on ” Zirka” power tillers is manual, most of them are of mixed type, designed for 6 gears, two reverse gears, only on the light models are two-stage transmissions with reverse. Clutch system dry single-disc or multi-disc in an oil bath.

Fuel consumption in the most powerful model “Zirka” does not exceed 3 liters per hour, the fuel tanks for each model are chosen in such a volume that does not interrupt for refueling for 3 hours and more. To transmit torque to the wheels used belt drive for each wheel. Mothoblocs are equipped with a PTO for the operation of active attachments, which makes the device versatile and multifunctional.

Preparing for work

Most dealers offer presale preparation of power tillers, but the final adjustment of the engine should be made after the running-in and during the work itself. The single-axle tractor “Zirka” will not be an exception. Adjustment of the valves should be made at the earliest stages. Engine running-in time for each motoblock may be different, manufacturers indicate in the instructions the number and approximate load for each stage. During breaks, check the oil level, the condition of the air filter.

After purchase

The sequence of preparation operations is the same for most power tillers, and it is this that will determine the stable operation of the unit for many hundreds of moto-hours:

Checking and filling up the oil. At this stage it is necessary to lubricate all moving parts, bearings. The oil grade must always match the enclosed manual.

How to adjust the nozzle of a power tiller

Heavy smokiness and high fuel consumption. these are the signals to which the owner should pay attention, they will tell him that it is time to change the injectors in the diesel engine. True, they do not always need to be completely replaced, often they can simply be repaired. The most common causes of breakdowns can be wear, clogging or corrosion. For a long time fuel equipment manufacturers didn’t spread that repair of diesel injectors was possible, they just collected them all over the world and then, after repairing, sold them again. These injectors were very expensive, despite the high quality of repair. Only diesel engine repair specialists can get ahead of the exact problems in the injection devices. Conducted a special test, which checks the mobility of the needle in the atomizer, the shape of the sprayed fuel plume, nozzle opening pressure. For all diesel equipment, of course, the indicators will be different. complicated is the case with double-spring injectors, before injecting a dose of fuel at a pressure of 150. 250kg/cm2 it must be raised by 0.03. 0.05 mm, missing the preliminary portion of fuel. Only the most advanced equipment can fix this point, but the most difficult task can be considered the determination of the amount of fuel from the atomizer into the cylinder of dual-spring injectors. Blockages cause the needle to jam, or the fuel injected changes its spray pattern. Very often the injector is clogged, and for normal operation it simply needs to be cleaned. If such injector was detected by you, it is usually cleaned manually, disassembled, with scrapers and brushes, or with ultrasound and a special fluid. If a diesel engine injector fails, most often the atomizer and needle need to be replaced. To determine the exact cause of the malfunction the atomizer is placed in a test case and if the flare data is unstable then the cause is definitely the atomizer. A washer between a spring and a nozzle, also tends to wear out. The washer can be ordered from a special catalog. Springs break less frequently, although they can lose stiffness and sag, they are usually repaired by adding adjustment washers. Breakdowns of the injector body, caused by corrosion or just wear, means that such a part must be completely replaced. If your diesel injectors are equipped with electric needle lift sensors, the repair will be very difficult to perform, since the repair parts include only the mechanical part. Replacement of the atomizer is a primitive measure. It can correct deviations in atomization parameters, but unfortunately it will not improve the work of the engine itself, the worn part will still give wrong information to the engine control unit, and even if you disconnect a faulty sensor it will hardly improve the situation. The main enemies of your diesel engine are water and sulfur. the water from the diesel fuel which remains in the engine after it has been stopped and in the atomizer, if the car is parked for a long time, causes corrosion in these parts. It damages the washers and provokes leaks, and because of corrosion products the moving parts of the engine get jammed. For example, if the needle is corroded to the seat or guide channel, it will move and destroy the atomizer the first time it is started.

Maintenance of the Diesel Fuel System

Diesel engine power system faults that can impair proper engine performance include difficulty starting, hesitation, irregular running, reduced engine performance, foul exhaust, erratic engine operation, and “flat-out” when the engine is difficult to stop. Difficulty starting the engine is the result of excessive reduction in injection pressure and reduced fuel supply. These failures are caused by wear of plunger pair and injector nozzle orifices, reduction of injector spring elasticity, poor fixing of connectors, clogging of filters and pipelines.The engine is malfunctioning if the high and low pressure fuel line connectors are loose, the fuel filter covers are loose (air drain), the fuel priming pump is defective, the size and regularity of the fuel supply by high pressure pump sections is out of adjustment.Engine output decreases due to insufficient fuel supply and improper pump adjustment.Exhaust fumes are caused by excessive fuel supply and poor atomization, or by faulty high-pressure pump settings and worn piston rings. Excessive fuel supply occurs due to improper adjustment of the high-pressure pump, and poor atomization due to loss of spring tension in the nozzle, loose connection of the needle and wear of orifices of the atomizer.Engine operation “in disrepair” occurs in the case of jamming the rack, breakage of the rack wire lever spring and ingress of excessive oil into the combustion chamber with wear of the piston group.When performing assembly and disassembly work it is necessary to ensure maximum cleanliness, as even a slight dust or dirt penetration into the power supply system can lead to its clogging and wear of parts. After disconnecting the fuel lines all the holes of the devices and pipes must be closed with plugs, caps or wrapped with clean insulation tape and all the parts must be thoroughly washed before reassembly.Fuel lines and filters should be flushed and blown out with compressed air. Fuel filters shall be replaced if they are heavily contaminated or in accordance with the factory instruction.Worn out or broken parts of faulty fuel feed pump and high pressure pump must be replaced. High-pressure pump after servicing should be tested and adjusted on a special bench SDTA-1. Adjustment is made on the beginning, size and evenness of the fuel supply.In the nozzles check the cleanliness of the holes, and if they are zakoksovany, they are cleaned with a steel wire with a diameter of 0.3 mm. Assembled nozzle is checked for injection pressure and atomization. Injector needle should be tight to its seat, and if the seat is out of alignment, it needs to be lapped and the filter element of the air cleaner needs to be replaced.Leakage in the fuel system, besides increasing fuel consumption, leads to the engine malfunction. To check tightness of low pressure fuel lines the device NIIAT-383 type is used. In this device a pressure of 0.3 MPa is created and connected to the fuel line on the tank side, and all leaks in the connections are detected by the abundant fuel leakage. Any leaks in the high pressure lines can also be detected by fuel leakage.The beginning of fuel supply in the high pressure pump sections is adjusted on the test bench of SDTA-1 type with removed clutch.Adjustment of the size and uniformity of fuel supply by pump sections is made on the same stand. How much and how evenly you feed it is determined by the amount of fuel in the measuring cups for each fuel cell.Regulate the crankshaft speed at idling speed by turning the all-mode regulator buffer spring housing when the engine is warm.The maximum rotational speed is regulated by the maximum revolution limiting screw. Checking with the tachometer.

Potato planting methods

Since ancient times there has only been one way to plant potatoes. by hand and shovel. Over time, man began to understand that the work must be accelerated. Attempts began to be made to automate this work in some way. As a result, more and more farmers today use tillers in their work. There are four basic ways of planting potatoes with a power tiller:

• With the use of an okuchnik. this is a special tool that loosens the soil. The operator himself lowers the seedlings into the ground.
• Using a potato planter. this method also automates the process of lowering the seedlings into the ground. A potato planter is a small metal tank that is attached to the back of a power tiller. There is a hole in the bottom of the tank through which the seedlings fall into the ploughed ground.
• Using a cultivator. Motor cultivators are a bit smaller than power tillers, they weigh less, and it is almost impossible to install any attachments on them. However, they do an excellent job of tilling the soil before planting the potatoes.
• Using a plow for a power tiller. Another highly effective way of planting large amounts of potatoes. The plow is attached to the power tiller, the operator tills the ground, and then the potato seedlings are lowered into the ground with the help of the potato planter.

Don’t forget to carry out additional hilling of potatoes afterwards with a power tiller. Sometimes it needs to be done up to four times a season.

How to further dig out your motoblocks potatoes? You can use a mower or other attachments. But it is important to set the depth carefully so as not to damage the fruit. There is also special equipment that pulls the fruit out of the ground by the haulm.

Planting potatoes with a tiller

To plant potatoes under a single-axle tractor, you need to use special equipment. It includes trailing wheels, wheel extensions. To cultivate the land, you need a planter. Additionally it is possible to use a plow or potato planter. The main advantage of using a power tiller is the high speed of all work. For example, to plant potatoes on five acres it may take you a whole day. And if you use a single-axle tractor on this area, it will take no more than three hours to do all the work.

Using the tiller

The tiller is the most common tool for power tillers. It is cheap enough, but it has a high efficiency. To use a single-axle tractor with an arrowhead to plant potatoes, you need to make a number of adjustments. The spacing between the wings of the planter should be the minimum available; the wheels of the tiller should use trailing wheels, and the track width should be around 60 cm. Then the furrows are furrowed all over the area to be sown. Then the seedlings are planted in the furrows. Planting potatoes with a power tiller is the easiest way to increase speed.

Using the potato planter

You want to plant potatoes with a power tiller with high speed? Use the potato planter. This is a handy tool that allows you to make furrows, put the potatoes into the furrows and then close the furrows at the same time. This is possible thanks to a special design of the attachment. In the front part of the canopy is located in the okra, in the central part. a special hopper, in the back. a disc structure for backfilling with earth. This method is ideal for work on large areas, or in situations where it is important to save time.

Repair with their own hands

How to fix a diesel single axle tractor nozzle

Check if it works with the fuel pump on the engine. After that the injector is inspected and adjusted: it is disassembled in a clean place, then washed with kerosene or clean fuel, blown and reassembled. In this simple way the product returns to working condition.

What to do if the diesel single axle tractor won’t start

First we find the faulty area of the power tiller. To make a few actions:

• turn on the ignition, start the mini-tractor;
• Check the presence of fuel;
• check if the carburetor air damper is closed;
• Check if there is fuel access to the carburetor;
• To see if the spark plugs are all right.

In this video, let’s look at adjusting the valves of a diesel motoblock:

• If the fuel has no access to the carburetor, you should unscrew and rebuild the fuel tap, where you need to clean the filter from dirt. You can also check the fuel level (regulated by the float), it should be about 30-35 mm.
• To check the carburettor, first you have to remove it, empty it and let the air through the connector. If the carburetor is okay, the air should pass easily. The air passage procedure is repeated one more time. Only after that are taken for adjustment.
• If the matter is in the spark plug, it may be dirty, then you need to clean it and check the gap between the electrodes (not less than 0.8 mm).

Why the diesel single axle tractor doesn’t start well

• A dirty air filter needs to be disassembled and cleaned;
• combustion products can clog the muffler, it should also be simply cleaned;
• incorrectly installed carburetor, then it must be reinstalled;
• Failure of the cylinder piston group;
• Also the problem may be the use of summer fuel in the winter. Summer fuel residue turns into a draggy mass that can’t be pumped into the engine by the pump. Here you should simply warm up the fuel by driving the single axle tractor into a warm environment.

As you can see, to fix everything yourself is not difficult, the main thing is to follow these rules and instructions, because the care of any device, prolongs his life.

What to do if a diesel single axle tractor jerks

In such a case, immediately turn off the engine and give the engine some time to cool down, only then can you begin to repair or troubleshoot. There are several reasons for such malfunctions:

• there is not enough oil in the engine crankcase;
• a nadir has appeared on the bottom of the connecting rod;
• the oil sprinkler or connecting rod (the part that connects the piston and the crank pin) is broken.

What to do if there is heavy black smoke coming out of the engine when it is running?

This could be an indication that the fuel mixture that the carburetor receives is too saturated, or there is a problem with the piston ring or the air filter is clogged.

To eliminate this factor, the following actions are made:

What to do if the engine is broken

Basically, there are two most frequent causes of engine failure. This is when the engine, in principle, does not work and when it still functions, but unsatisfactorily.

If you examine the first cause, you should proceed as follows: first you need to turn on the ignition, check the amount of fuel in the tank, the opening of the fuel tap and the condition of the carburetor air damper, and then the flow of fuel into the carburetor. Also remove and clean the nozzle, thus removing the clog. Another reason can be weak fuel injection pressure, which can be corrected with the help of instructions accompanying this machine.

If the engine turns over too quickly or easily with the starter, then the problem is either the valve or the piston rings. In the first case, you should simply remove this valve and wash it, and in the second, if the piston rings are worn, they are replaced with new, serviceable.

How to adjust the valves

If the process of flushing the valve did not help, then it is necessary to carefully adjust them. For this you need some tools: wrenches, screwdrivers and a dipstick or a razor blade. Adjust. this means to adjust the normal valve clearances of motor block engines. The value of these gaps differs for each model, so it is necessary to view it in the manual beforehand. First remove the engine cover, then the valve cover, here is made the adjustment. the establishment of optimal clearances.

Warning! To check the gap value, place the dipstick under the valve, if this is easily possible, then everything is normal, but if not, to adjust you need to loosen the nuts again place the dipstick. Then install the valve box cover and cover.

Moto-block repair with your own hands

All the faults of a power tiller can be divided into two categories. engine malfunctions and malfunctions of all other assemblies and mechanisms. Most often, the owners of these multifunctional machines have to deal with the first. Before repairing your power tiller with your own hands it is desirable to get acquainted with the scheme of your power tiller.

Moto-block repair

For some information that may be useful when repairing your power tiller see Dismantling your power tiller.

Engine trouble

There are two main types of faults of this kind. Engine start failure and its unsatisfactory work (interruptions, power shortage, spontaneous stopping).

The engine does not start. If we are talking about a gasoline engine, when searching for a fault, you must consistently check all possible causes of malfunction, namely:

• Switch on ignition.
• Fuel presence in the tank.
• Open the fuel cock.
• Condition of the carburetor choke (when starting a cold engine, it must be closed).
• Fuel flow into the carburettor. Fill the float chamber by pushing down the float button (fuel should start gushing from the hole in the float chamber cap) or disconnect the fuel hose from the carburettor and check that the fuel flows freely. If fuel is flowing too thinly or not at all, it could indicate that the fuel filter in the tank is clogged or that the fuel filler cap air valve is clogged. Repair motoblock in this case is reduced to cleaning the filter or valve.

The fuel intake into the engine cylinder may be evidenced by the condition of the spark plug, which in any case should be checked when searching for faults in the ignition system. The spark plug should be unscrewed from the cylinder head by disconnecting the cable and examined. If it is dry, it means that the fuel mixture is not being fed into the cylinder. And if before it was found that the carburetor receives gasoline, then the reason for the failure to start the engine may be in the carburetor. the filter mesh is dirty, the nozzle is clogged, or some other malfunction. Whatever it is, the carburetor must be removed, disassembled and cleaned, but this device is very complicated and before its repair you should at least look at the carburetor diagram.

Cascade motoblock carburetor

A wet spark plug indicates that fuel is entering the cylinder. Sometimes the single axle tractor does not start because of an excess of fuel mixture, so if there is too much gasoline on the spark plug, you need to dry the cylinder by giving the engine a good “pumping” with the hand starter with the spark plug turned out. Before you do this, you need to shut off the fuel supply.

If the spark plug is contaminated with soot, it should be cleaned with gasoline and a fine sandpaper. Also check the gap between the electrodes and adjust if necessary according to the operating manual. Usually the gap should be about 0.8 mm.

after that it is necessary to check the spark. connect a wire to the spark plug, press its metal part to the cylinder head and imitate starting the engine with the starter. If the spark plug is good, there will be a spark between the electrodes. Sometimes it happens that the spark occurs, but is so weak that it is not enough to ignite the fuel. If in doubt about the strength of the spark plug, check engine operation with a new spark plug.

Lack of spark can mean a defective spark plug, no contact in the electrical circuit, the gap between the ignition coil and the magnetic coil, the failure of the electronic ignition coil. All of these elements should be checked. Faulty spark plug and ignition coil should be replaced.

If the single axle tractor is equipped with an electric starter, the engine may not start due to low battery, blown fuse, malfunction of the starter. Check battery charge, replace fuse, repair or replace starter.

The engine does not develop power. If your power tiller starts but fails to develop power (malfunctions, stops or fails to pick up speed under load) the possible causes of unsatisfactory work are.

The air filter is clogged, causing insufficient air flow into the carburetor and creating an over-enriched fuel mixture. Proper maintenance of your power tiller requires periodic cleaning of the air filter, but very dusty conditions may require more frequent cleaning. Check the condition of the air filter and depending on the filter material clean using one of the proper methods. The paper filter is cleaned by lightly tapping on something hard and blowing with a vacuum cleaner, the foam filter is washed in water with detergent and dried, the mesh filter is blown with a vacuum cleaner, etc.д. Replace filters at the end of their service life.

Air filter on your SunGarden power tiller

Poor fuel quality. Replace bad fuel with manufacturer’s recommended fuel.

Ignition system is defective. Check it as described above. Clean the spark plug and adjust the gap between the electrodes, check the electrical circuit for damage and check the gap between the coil and magnetic wire (if required by the instructions for repairing the power tiller).

Sometimes the engine cannot develop power because the muffler is clogged with combustion products. In this case, take the silencer apart and check its condition, if necessary wash it in petrol and clean it with a sootblower. After washing the non-dismantled muffler, dry it with a hairdryer. Remember that soot contains carcinogenic substances and dry cleaning that may lead to inhalation is not permissible. When removing the muffler, the exhaust port of the engine is plugged with a clean rag.

Contamination or improper adjustment of the carburetor of the motoblock. It is necessary to remove and clean the carburetor, and then make its adjustment, if it is provided by the instructions of the motoblock.

The engine of the motor block does not start when it is hot

The question of why the engine of a motorblock stops when heated is quite simple to solve. The whole essence of the problem lies in an overabundance of air supplied to the carburetor of the motoblock. Part of it is mixed with a mixture of gasoline and engine oil, and the second part cools the carburetor. As a result, the temperature of the carburetor becomes much lower than the temperature of the machine’s engine. This problem occurs only when the engine is running. When its engine is turned off, the carburetor, on the contrary, succumbs to heat from the red-hot walls of the engine.

During the heating of the carburetor, the residual fuel begins to evaporate actively, filling all the voids in the engine block device, including the air filter and intake manifold. This will cause the fuel to completely disappear, causing the single axle tractor not to start when the motor is hot.

To correct this problem, you need to act in a certain algorithm each time you start your power tool “on hot”. Your main task is to achieve unification of the mixture so that the engine can start. This will require:

• In the process of starting a hot engine to press the gas trigger on half;
• Do not try to squeeze the gas trigger time after time, otherwise you will only make the situation worse, because during frequent squeezing the gas trigger the fuel pump will supply new portions of fuel to the carburetor, which will cause the engine to flood;
• After several attempts to start with the throttle trigger pressed halfway, you will start the engine of the power tiller, after which you will need to accelerate 2-3 times and continue working.

This procedure will eliminate the increased load on the hot motor, so that the main parts and mechanisms of the motor-block will not succumb to excessive wear.

All of the above methods will help effectively deal with typical breakdowns of the most well-known power tiller manufacturers. They are used equally successfully by owners of agricultural machines brands Honda, Agro, Kaskad and Neva.

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