How to reverse on a mole cultivator

Frequent malfunctions

When we talk about repairing a mole cultivator, it’s worth listing the following breakdowns and ways to fix them:

  • Faulty ignition. a frequent breakdown of the Moto-Block Mole. First, check the spark plug. it is unscrewed and inspected. A dry spark plug indicates that the fuel mixture is not entering the cylinder. If the spark plug is very “wet”, “pump” the engine with a hand starter. so you can dry out the cylinder. If the spark plug has a lot of soot, clean it with a fine cloth and gasoline.
  • The gap between the electrodes is usually 0.8 mm, adjust it if necessary.

Faulty ignition. a frequent cause of repairs on the mole cultivator

  • No spark. So, the spark plug is faulty, just put a new one in the plug (Link to spark plugs from Aliexpress). It is also possible that there is no contact in the electrical circuit or that the gap between the magnetic core and the ignition coil is broken.

The ignition of the Mole motoblock depends on the condition of the gasoline hoses, the insulation of the high-voltage wires and their connection. Check everything carefully, the flywheel plates MUST NOT touch the magneto cores. Make sure there are no signs of touching.

  • Check the air filter. If it is dirty, not enough air is getting to the carburetor. Even a dirty muffler affects the engine’s performance.

You can’t find the ignition failure? Consult a specialist, you can not cope with a serious problem on your own.

With all the simplicity of design, motocultivators Krot are extremely sensitive to contamination of individual nodes, parts, mechanisms and other components of the unit. Many operating problems arise from untimely replacement of consumables, disregarding of elementary rules for equipment maintenance. The ironic slogan “Tanks are not afraid of dirt” in this case does not work.

Let’s review the most frequent problems and failures that occur in the main parts of the cultivator.

Engine

The first models of Mole cultivators had a lot of complaints about the engines, which were unreliable and had a low service life. The owners of the equipment had to risk rework the farm machines. Very often new engines were installed on these machines to replace worn-out ones of other gardening equipment: Forza, Patriot, Sadko, Lifan.

reverse, mole, cultivator

Thanks to the factory design developments there appeared cultivator models with motors Honda GC 120, Honda GC 135, Greenfield, GeoTeck, Subaru Robin EY-15D, Hammerman, INNOMOTOR, BriggsStratton of the famous Japanese, German, American, Hungarian, Italian brands.

Thanks to modern engines, innovative developments, the Mole from the once narrow-functional milling cultivator has become a versatile agricultural machine, which is under the power to perform any agricultural work on the soil, crop cultivation, as well as cargo transportation, clearing the area.

Therefore, if there is still an old two-stroke engine on your Krot motocultivator, urgently change it to a new model and boldly expand the functionality of the unit. The most budget and fairly reliable option is Lifan, “Americans” and “Japanese” will be more expensive, but then the attention to themselves will require much less.

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Initially, the Mole cultivator comes with an engine with one cylinder. It has forced air cooling and a 2-stroke carburetor. The motor has a nonremovable starter. Start. manual, about the same as in chainsaws.

Characteristics of the engine for motocultivators brand “Mole“:

  • 2.6 horsepower;
  • volume. 60 cc. see;
  • fuel consumption. 0.96 l/kWh;
  • tank volume. 1.8 liters;
  • RPM. 5500-6000 per minute.

Peculiarities of the design of the engine on the Mole power tiller:

  • The carburetor in the cultivator is designed like those on old mopeds. “Verkhovins” and “Karpatas”;
  • the engine has a dry-type air cleaner with a replaceable filter;
  • A-76 gasoline is used as fuel;
  • M-8 B1 oil in a ratio of 1:20 is added to the gasoline;
  • Ignition is electronic, non-contact type, brand MB-1;
  • spark plugs. A.11.

The belt is an important part

V-belt for power tiller Mole, Caiman, Patriot, Texas, Pro Arab, Crosser, VIKING, Forza is one of the most necessary elements for the functioning of the unit. Its purpose is to transmit torque from the engine to the parts of the machine. If you do not know what belt on the motoblock “Mole”. you have a classic version of A 750.

Belt size on a Mole single axle tractor in this case is easy to determine. the marking corresponds to it in millimeters. Usually Soviet and modern Russian samples use exactly this kind of detail. On the other hand, you need to check your single axle tractor “Mole”. Drive belt, its size can also be 785 mm. Width. 12 mm.

The belt for the Krot power tiller is used only in this temperature range:.30°С to 60°С.

As well as the oil level, the condition of the V-belt must be constantly monitored. Crack, deformation, change in size. you must immediately change this important part, because the unstable operation of the belt will lead to breakage or deterioration of the entire machine. It is very easy to replace the belt.

Upgrade of KROT power tiller

Mole type motocultivators have been produced in Russia for a long time. The first model of motocultivator MK-1 “Mole” was made as a single-purpose machine for tillage. By now the technical possibilities of power tillers have been considerably widened and even the feed mini-machine has been developed as a set of machines. Outwardly, motocultivators look like motor blocks and their main structural units are the same.

Description of the KROT motocultivator

Motor cultivator MK-1 “Mole“:

operating device (rotor); 2. gearbox; 3. operating device knife; 4. gas tank; 5. engine stop button; 6. clutch control lever; 7. carburetor throttle control lever; 8. engine; 9. coulter; 10. support; 11. frame; 12. transport wheel

The MK-1 main assembly (see Fig 14) is comprised of two lever handles and two sprockets. figure.) are engine with integral gearbox (described below), transmission, control system, operating elements, coulter, wheels.

Transmission ensures transmission of torque from single-stage engine gearbox to the operating elements and consists of V-belt transmission and lower two-stage gearbox. V-belt drive also serves as a clutch. On the output shaft of the chain reducer the operating elements are installed.

The control system consists of two length and width adjustable levers. On the left of them is the throttle control lever of the carburetor, on the right. the clutch lever. The engine is stopped with a stop button in the control system.

The tines are made in the form of rotors, each with four specially shaped blades. The milling drum with a diameter of 320 mm is assembled from two or four rotors. Working width is 330 mm in the first case and 580 mm in the second case. When fitted with two additional rotors the working width is 830 mm. The milling drum rotates at 85 rpm and till the soil up to 20 cm deep (depending on the settings).

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The power tiller moves forward by rotating the working elements. rotors that simultaneously perform the technological process.

The coulter is mounted behind the tines and controls the working depth. Height adjustment of the coulter in steps.

A pair of wheels in the form of discs with a rubber rim has no drive and serves only to move the cultivator, and during operation the wheels are lifted up.

Productivity MK-1 at milling the soil to a depth of 20 cm is 0.017 ha / h, and at cultivation to a depth of 10-12 cm. 0.05 ha / h, that is, its use on the most labor-intensive processing operations. of the soil increases labor productivity more than 5 times compared to manual. Additional devices are supplied to the MK-1 power tiller: harrows with L-shaped blades with a wedge-shaped blade, discs that protect from damage during rotary treatment of the soil, and perchiknik. Using these devices can bekomplektovat aggregate, for example, for the combined processing of inter-row potatoes: planter installed instead of the working bodies of rotors, and protective discs on the shaft sections of polovnikov; okruchnik mounted instead of doshnik at the rear of the frame. During the operation of the machine knives-splitters loosen the soil, trim weeds and simultaneously contribute to the movement of the tiller, and perch on the loosened soil perches two adjacent seedbeds on one side each in one pass. Such unit cultivates 0.14 ha per hour, which is 18 times more productive than doing similar work by hand.

Dimensions MK-1. 1300 X 800 X 810 mm, weight 50 kg, it can be easily put in a trunk or on a car roof.

In general, for the modifications of all mole cultivators of the “Mole” type, besides the already mentioned for MK-1 working tools, they produce a small plow, a mower, a semitrailer with a carrying capacity of 200 kg, and a water pump. A front attachment has been developed that forms a motorized cart when the attachment is connected to the power unit of the power tiller. Sprayer, home saw and other devices are created to be used with this power unit.

MK-2 and MK-3 versions have 320 mm wheel diameter, ground clearance of 90 mm, track dimensions of 285 or 600 mm and overall dimensions of 1960X800X1170 mm. The MK-2 model has one forward gear, which provides up to 7 km/h speed, weight 50 kg. The MK-3 has two forward gears, providing travel speeds of 4.7 and 7.1 km/h and two reverse gears (2.8 and 4 km/h), weighing 60 kg. This model has an additional pulley mounting option and is equipped with rear and front linkage. With the help of the pulley you can drive a variety of small-sized machines, including those used in homestead livestock farming. To the rear linkage one attaches or attaches implements related to use of traction force (plough, ridger, semi-trailer, etc.).). Tools and machines with active working bodies (mower, feed mill, pump and others) can be mounted on the front and actuated through V-belt drive.

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Improvement of motocultivator KROT

For higher performance, I propose to install on a MC 4-stroke engine manufactured in China LIFAN 160F, with a capacity of 4 hp. This increases the power of the MC at low rpm. Now it is not necessary to increase the engine speed to work the soil depth of 20 cm (according to the passport). In addition, due to the power, the processing depth has increased by 1.5 times and was about 30 cm. (before the belt slips). The engine is easy to install.

One more not unimportant plus of this replacement. the engine starts in a cold or hot condition. The speed is automatically kept at the desired level. With more power the gasoline consumption has remained approximately the same as that of the regular engine, besides now there is no need to add oil to gasoline (4-stroke engine).

The installation of a new engine does not require much effort and alterations. The engine mounts fit into the standard seat. The pulley is taken from an old engine, the inner bore and the keyway are slightly drilled.

After causing a lot of stress with the old engine, the new one gives me a whole new set of emotions when working with the cultivator!

Library: Handbook for small-scale mechanisation in the home and farm household. Under ed. И.П.Oil. 1996г.

Мотокультиватор Крот.Motor-cultivator Mole

The device gear motor cultivator mole with reverse

Mole “Mole” became one of the first Russian products of small-sized agricultural machinery, in general, the first moto-block, mass production of which was organized in our country. Since 1983 and to this day Krot power tillers have been produced at a number of machine-building enterprises from Moscow to Omsk, and in the 2000s. at Chinese plants and factories. How during this time the single-axle tractor proved itself in the busy hands of dacha owners, vegetable growers and farmers? What are the features of its design, advantages and disadvantages? How “Mole-2” differs from “Mole-1”?

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