Motoblock "Neva MB 2": Choose Spare Parts, Instructions For Its Operation, Characteristics And Device Of The "MB-2M" And "MB 2B-6.5 RS" Models, Carbur

2024 Author: Beatrice Philips | [email protected]. Last modified: 2023-12-16 05:33

The first block of the "Neva" company was produced in 1984 in Leningrad at the "Krasny Oktyabr" plant. Distinctive qualities of these units: easy to operate, even a beginner can cope with their control. The units are unpretentious in service and are highly reliable.

Basically, "Neva" units are designed to loosen any soil on personal plots, to perform work where significant loads are required (transportation of goods, harrowing, cleaning the territory).

Features, pros and cons

Motoblock "Neva MB 2" is one of the most popular units of this type. Differs in versatility, has excellent technical characteristics. Ideally suited for work in personal subsidiary plots, vegetable gardens, orchards.

There are engines with markings:

• 2K;
• 2B;
• 2C;
• Motoblock Neva M-2K;
• Model 2K.

The letter "2K" means that the walk-behind tractor has an engine made in Russia , it has a good resource and an average price. The single-cylinder engine has a capacity of 6, 1 and 7, 6 liters. with.

Much depends on what the unit is worth: DS 1 or DS 2. The first one can run on 76th gasoline, DS 2 requires 95th fuel. On average, gasoline consumption is about three liters per hour if the walk-behind tractor is almost 100% loaded.

Motoblock with the letter "2B" has an imported power plant (most often Briggs & Stratton). Such mechanisms are considered to be the most reliable. Model "2C" on such models there is a Japanese engine "Subaru " with a capacity of up to 7, 1 liters. with. Diesel versions are more powerful.

Japanese technology requires correct configuration, only then will it work without failures. Before buying a Neva walk-behind tractor, you should understand what kind of work it will do.

If the plot in the country is too large, more than 16 acres, then the engine should be chosen at least 9-10 liters. with.

"Neva MB-2" is fixed on the frame, and various equipment can be assembled there. The power plant is equipped with a gearbox with six gears, this is a significant help in the processing of even the most dense soils.

The machine can move at a speed of up to 10 km per hour, even oversized heavy loads can be transported. The walk-behind tractor has four speeds, 2 of them are rear. The control is very convenient, it is mounted on the steering wheel handle.

The V-belt drive can quickly rearrange the pulley, lever and belt. The unit is well-equipped, there are cutters for various purposes in stock.

The device weighs only 99 kg, its dimensions are compact. It can be transported over long distances in the trunk of a car.

The machine can do a job like this:

• plow;
• sow;
• to harvest;
• serve in public utilities;
• work like a pump.

Main settings:

• depth of penetration into the ground up to 21 cm;
• the grip can be realized up to 130 cm;
• the set includes 6 cutters;
• turning radius 112 cm;
• cutter diameter 37 cm;
• tractive effort 172 N;
• dimensions LxWxH, meter - 1, 75 by 0, 66 by 1, 4;
• work is permissible at temperatures from - 26 to +39 degrees Celsius.

In the cold season it is necessary to drain the "summer" oil and fill in the "winter" oil. It is unacceptable to use the wrong oil, this will lead to damage to the unit, the same statement applies to fuel. American power plants are extremely picky about the purity of gasoline. It is better to filter domestic fuel before pouring it into the tank of the walk-behind tractor.

The unit's service package includes:

• running in the engine and setting it up;
• adjustment of the gearbox and transmission;
• adjustment of attachments;
• preventive maintenance and testing;
• timely oil change.

Device

The power plant has an overhead valve arrangement, the crankshaft is located in a horizontal position, which allows you to create significant torque. Motoblocks "Neva" for the most part are equipped with this particular unit manufactured in St. Petersburg. The second most popular unit is from Subaru (Robin-Subari EX21), which also has a capacity of 6, 6 liters. with. Motoblocks "Neva" are mounted with Briggs Stratton engines (power 5, 6 hp).

Domestic motoblocks with the DM-1K engine can have modifications 6, 2 and 7, 5. The first is focused on fuel 76, unleaded gasoline, the second is designed for gasoline 92 brands.

For 35 years, many different modifications of Neva walk-behind tractors have been produced, however, the main parts of the unit are standard, which facilitates maintenance, spare parts can always be found on the market. The bearings are reliable and keep the gear running smoothly. The decompressor works in automatic mode, it is an integral part of the unit. The air filter has two packaged units.

The engine consumes a small amount of fuel and produces a negligible amount of noise. The spark plugs ensure uninterrupted operation of the ignition, the engine can be started even in high humidity conditions at any temperature.

"Neva MB 2" has dimensions:

• length 1742 mm;
• width 652 mm;
• height 1310 mm.

The track has a width of 322 mm, if we take into account the extensions of the axle shafts, then the size can reach 570 mm. The ground clearance of the walk-behind tractor is 142 mm. The cutters have a diameter of 36, 2 cm, tillage in depth can reach 22 cm.

Additional cutters can be attached to the walk-behind tractor, bringing their number to 8 pieces. With such a unit in an hour, you can process 0, 11 hectares.

The volume of the gas tank has one tap and is 3.5 liters. Average fuel consumption 1.5 liters per hour. The engine is four-stroke, one cylinder. The power plant starts to work from the starter. With attachments, communication is provided through a three-row pulley, at the beginning of the engine operation, control is carried out using an air damper.

The engine is bolted to the frame, the tires are pneumatic. Attached elements and accessories significantly expand the functional range of the walk-behind tractor, increasing the efficiency of the unit. Sometimes weights are used to better balance and improve work efficiency ..

In total, there are more than two dozen varieties of this unit; for more efficient coupling with non-standard attachments, special adapters are used.

Models

NEVA MB2 MultiAGRO

This is a new model that can rightfully be called one of the most successful. The unit stands out from the line for its rich functionality, as well as a good Briggs & Stratton engine, which belongs to a separate Vanguard series. Complemented by an excellent gearbox with original characteristics.

The engine resource is designed for five thousand hours, which is a record among power plants of this class .… The walk-behind tractor has two forward gears, one is reverse. The traction force is about 142 N, which makes it possible to work on virgin soil and transport heavy loads.

The walk-behind tractor has a single-cylinder four-stroke engine. Differs in economical fuel and oil consumption. Any attachment is suitable for this walk-behind tractor.

Set:

• motoblock "Neva MB-2B-6, 5" 1 pc.;
• cutters 4 pcs.;
• wheels (4.6x10) 2 pcs.;
• axle attachments 2 pcs.

NEVA MB2 B

6, 5 l. with. suitable for a wide variety of jobs. Such a unit is indispensable in subsidiary utilities. This walk-behind tractor is equipped with a four-stroke Vanguard engine, in which there are a number of original improvements:

• more modern carburetor layout;
• the reducer has several additional stages;
• there are big wheels.

The processing strip is 82 cm, if you put additional cutters, then the strip increases to 126 cm.

Neva MB-2N GX200

It makes it possible to cultivate the soil and clean streets and squares. The power of the unit is enough to cultivate virgin lands.

The petrol engine from the Honda company has a cast-iron body, power 4, 2 kW. The machine is distinguished by increased traction parameters.

Neva MB2 GX-200

It cannot rightfully be called a heavy unit. Maneuverability, cross-country ability and power are noticeably higher than average.

The unit is distinguished by its unpretentiousness and high performance. Maneuverability is achieved by locking the wheel. You can put eight cutters, the track width can be up to 172 cm. Can be combined with any attachments.

Characteristics:

• the mass of the device is just over one hundred kilograms;
• the fuel tank holds up to 3.2 liters of gasoline (92 or 95);
• there are two gears;
• you can cultivate the soil at a depth of 21 cm;
• shaft turnover in first gear 22-43;
• shaft revolution in the second gear 88-161;
• the gearbox is enclosed in an aluminum housing.

Neva MB 2S-7, 5PRO

Another popular motoblock model. The machine is distinguished by its ability to work in any weather and temperature. The reducer has a chain and gears, in which there is a double-grooved pulley. The device is very maneuverable, the wheels in it work autonomously. There is a function to turn off one of the wheels. The land can be cultivated with eight cutters, working width 171 cm.

The technique is capable of performing almost any job, characteristics and types of work:

• cleaning the territory;
• transportation;
• harvesting root crops;
• mowing;
• with the Subaru engine;
• the amount of fuel in the container is 3, 5 liters;
• total weight 101 kg;
• aluminum body;
• the width of the cultivated soil is 171 cm;
• processing depth 21 cm;
• shaft revolutions 22-43 (1st gear) 88-161 (2nd gear).

Neva MB 2S-6, 5PRO

This is a classic unit that has proven itself from the very best side. "MB 2S-6.5PRO" is versatile, it can work with any soil. The power has 4.7 kW (6.4 HP). It is possible to put up to eight cutters, the width of the cultivated soil strip can reach 172 cm. It is distinguished by high maneuverability even under high loads.

You can change the speed by throwing the pulley. It is possible to block the left wheel, which makes the unit more maneuverable when turning.

Main characteristics:

• suitable for transportation;
• processing of all types of soil;
• communal works;
• horse power 6, 1 (4, 5);
• the tank holds 3.5 liters of gasoline;
• the device weighs about a centner;
• gears are two forward and one is rear;
• gasoline 92 and 95.

Neva MB 2B-6, 5 RS

This walk-behind tractor is supplied with a gasoline engine from Briggs & Stratton of the I / C series. This is one of the best units that can successfully cope with the most difficult tasks, performing almost any type of agricultural work, soils can be different. Designed for processing areas of medium and large sizes. Additionally, the walk-behind tractor has an electric starter and headlights. Differs in increased performance, the engine is 6, 21 liters. with. (4.5 kW).

The unit is distinguished by good functionality, reliability, the mechanism can withstand heavy loads.

Main advantages:

• you can work in different gears, the pulley is simply redirected to the second cell;
• there are unblockers, they are provided with a maneuverability mechanism;
• there is a light source that allows you to work at night;
• fuel capacity 3, 9 liters;
• weight 98.5 kg;
• two gears - front, one back;
• engine displacement 204 cc cm;
• fuel - gasoline 92 and 95;
• the width of the cultivated strip is 85-128 cm;
• the number of shaft revolutions 22-43 and 88-162;
• immersion in the ground up to 21 cm.

Can be used with:

• public works;
• harvesting;
• transportation of goods;
• irrigation.

Attachments

The most popular attachments are the hiller and plow. The first is necessary to add soil. A plow is also needed to process the site.

The potato digger (KHM) can dig root crops up to a depth of 225 mm. The width of the strip processing is 26 cm. Dimensions 562x372x542 mm Weight up to 5.5 kg.

The CB 1/1 hitch weighs only 5.4 kg, dimensions 436x132x176 mm works with the following units:

• hiller;
• plow
• potato digger;
• lugs Ф342х112 mm;
• the mower for the Neva walk-behind tractor can cover a strip up to 1200 mm wide, the height of the grass that the unit can mow is 42 mm;
• snow removal equipment;
• potato planter;
• reversible plow;
• snow blower;
• wide rake.

User manual

The walk-behind tractor and attachments require regular preventive maintenance. Most units have imported power plants; they should be repaired at service centers. On your own, you can only run the unit at idle, pouring fresh oil into it.

Five hours will be enough to start the engine and warm it up. At the same time, it is not recommended to subject it to heavy loads at the very beginning.

The first few days, the walk-behind tractor will need to be loaded only by 50% so that all knots are properly rubbed in. After these procedures, the oil is completely drained, washed with a special composition. After that, a good semi-synthetic oil 10W30 or SAE30 is poured in the amount of 650 ml.

The amount of oil for the "Neva" will require approximately one and a half liters … If the engine starts to stall, smoke appears, then the unit should be sent to the service station, it is better not to disassemble anything on your own.

Carburetor adjustment is done on the Neva unit at the factory.

If the engine has been running for more than one year, then these actions should be performed

• The screw on the carburetor, which is responsible for the composition of the mixture, is tightened to failure, this will lead to a maximum increase in the fuel content in the combustible mixture.
• The engine starts, the mixture becomes lean, the screw is turned out, which regulates the amount of the mixture. In this way, the optimal operating mode can be found. All these operations can be done when the plug of the walk-behind tractor is clean, it should be in normal working condition.
• The unit should sometimes be "driven" at high speeds, no more than ten minutes, after carrying out such operations, the engine will work better.
• If there is a displacement of the centrifugal regulator, then it will need to be returned to its original position. To do this, unscrew the M8 nut, pull the damper all the way to the left. This location should then be anchored.

Sometimes the belt slips off the pulley. If you follow the instructions, you will need to adjust the tensioning mechanism. Often, the old belt is simply removed, a new one is put in its place.

The pulley is adjusted in this way:

• the engine is fastened with bolts;
• by adjusting the bolts, you can deflect the slider in the desired direction;
• look for the desired location when the belts are correctly tensioned.

Checking the belt tension is very simple: just press with your finger to understand how much it deflects. A deviation of the order of one centimeter is usually sufficient.

The plow can also be adjusted. The setting is done in two phases: the walk-behind tractor is placed on the load carriers, two pads are placed under them. The unit is secured without deviations. Then the adjustment of the "Neva" plow is done in such a way that the bar is close to the soil, the stand should be vertical.

To make a universal hitch using two nuts, you can only find the desired angle empirically, you will have to do several test tests. At the end, debugging is made of the angle of the moldboard of the earth, which comes out from under the cutting edge. A simple operation, it is done simultaneously with the adjustment of the rack itself.