Changing the oil in the gearbox of a Neva motoblock

Gearbox for Neva power tiller

Treatment of the land plot for modern gardeners is no longer as big a problem as it was in the not so distant past. On sale appeared such versatile equipment as power tillers, which greatly facilitate the life of agronomists and gardeners.

The Neva is one of the best machines in its line. They are reliable, durable and multifunctional. You will be able to both work the land and take care of plants, and collect and transport crops, garbage.

Here we will tell you about the reducer for the motor-block Neva, its structure, repair. This is one of the most significant elements in any machine, so if you want it to last a long time and without breakdowns, you need to know all the subtleties of its device, as well as the causes of malfunction and methods of elimination.

The structure of the gearbox on the motor-block Neva

Gearbox of Neva power tiller is responsible for gearbox transmission of rotation coming from engine to wheels and mounted tools. It controls the rotational speed, speed, and direction. forward or backward. In principle, the reducer for the MB 2 and MB 1 models do not differ much, so here we will consider exactly the second version. The gearbox is designed so that the components needed to change gears are located on the outside of the housing.

The gearbox lever has 5 positions. When you push on it, the fork disengages the clutch. When you drop the lever, the fork resumes its original position. the single axle tractor will pause when the drive is connected to the right half axle. There is torque coming from the sprocket. When the knob is pushed in, engaging the left sprocket, the gear is downshifted. If you want a higher gear, you have to push the lever all the way out.

Gearbox Failures and Repair

Like all other machines, power tillers and tractors can be at fault. If the gearbox is the problem, you will need to take it apart and repair it. Often the failure is negligible and you can easily cope with it yourself.

First, you need to thoroughly clean this part from dirt and oil residue, which will also need to be drained. Inspect all parts for damage. If something is out of order, it needs to be replaced. Use only new elements that are suitable for your model of Neva power tiller. Also remember to fill up with oil after assembly.

Some common gearbox breakdowns:

Обслуживание мотоблока НЕВА МБ-2 // Замена масла в двигателе // Часть 1

changing, gearbox, neva, motoblock
  • The spring or retainers are broken. They need to be replaced with new ones and then adjusted;
  • Adjustments in the shifting system are out of sync. You need to loosen the screws, put it in first gear, put the screws back on;
  • Oil is leaking from the shaft. The cause is most likely a worn collar. You need to replace it with a new one. How to replace the oil seals? It is sufficient to remove the old ones with a screwdriver or other object and install the new ones;
  • It becomes jammed. It may be due to a broken chain. It needs to be replaced with a new one;
  • Can’t lock the gear. The reason is the fork brush is worn out, so it must be replaced.

These are the main and most common gearbox failures. Very important. if you can not fix the breakage yourself, you should seek help from professionals.

Changing the oil in the gearbox of the Neva motoblock

It is also worth talking separately about changing the oil in the gearbox of a Neva motoblock. This should be done every fifty hours of work. It is also important to check the oil level. A flat wire will do for this. You dip it into a container with oil and it should be wet for 25-30 centimeters. What oil to pour into the gearbox of a Neva motoblock, you will learn from the instruction manual. Most often it is transmission TAD-17I, TAP-15B and others according to GOST 23652-79.


The Salyut-5 power tillers have 3 modifications, which differ in the type of the engine:

  • The Salyut 5L-6,5 works on a 4-stroke gasoline engine of 6,5 liters capacity.с. Such a versatile unit can replace a whole fleet of specialized equipment alone.
  • Salyut 5-P-M1 is equipped with a gasoline four-stroke motor Subaru. The design of the unit provides for ability to connect various equipment for various farming tasks.
  • Salute 5BS-6,0 is powered by an American four-stroke gasoline engine with a cylinder capacity of 206 cm³ and a powerful performance of 6, 5 liters.с. High-performance and reliable engine enables cultivation of virgin land and easily manages the processing of difficult soils.
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Oil for “Neva” power tiller to gearbox

Gearbox. is one of the most important components of any machine, including power tillers. What type of oil to fill, how often to change, how to check its quantity. all these questions every owner of such equipment should know the answers to. Before you buy oil, please read the instructions for use. There the manufacturer gives their recommendations, which are the most accurate and recommended. Oil type for different models of power tillers:

  • For the motor-block “Neva” MB 1 will do the following oil: transmission TEP-15 GOST 23652-79, TM-5 GOST 17479.2-85. You need to pour in a volume of 2.2 liters;
  • for “Neva” MB 2 unit is suitable according to GOST 23652-79, such as TAP-15V or TAD-17I.

For normal operation of the gearbox is important not only to choose a decent oil manufacturer, but also change it in time. It must be replaced regularly, at regular intervals. This will prolong the service life of the gearbox. Here are some tips on how to change it:

  • The single axle tractor should be kept strictly upright;
  • Place some kind of large container (at least 3 liters) under the product;
  • Unscrew the breather plug and clean it;
  • Unscrew screw and drain all oil;
  • Tighten the screw in place;
  • Fill with new, clean oil in the required amount;
  • Close the breather plug;
  • Check the performance of the equipment.

There are some other things you should know before you start working on your power tiller. As you know, the unit needs to run in for some time. After about 30-35 hours of running-in, you should change the oil to new. After that oil should be changed every 150-200 hours of work, and if you do not use the equipment, then every 1-2 years.

Many consumers ignore these recommendations, and the oil itself tends to age. Consequently, breakdowns may occur as a result. If you value your machinery, don’t ignore the manufacturer’s recommendations.

Other small-series Oka power units

Only VAZ 1111 and VAZ 11113 engines were installed as standard on the car. These are the power units that the car was delivered to retailers.

Мотоблок НЕВА МБ 23Б- 10.0 ФС Замена масла

As options to save production and meet environmental requirements, both SeAZ and KAMAZ tried to use power units from other manufacturers. This was due to the fact that AvtoVAZ refused to continue production of microcars and actually stopped supplying power units to complete the car.

So in 2004 was made the trial series of cars with Korean Hyundai Atos engine. It was made 15 cars for trial tests, but the program has not gone into mass production.

Also this year, small production testing of cars with engines from Melitopol plant MeMZ 245 was done. The vehicle was called Oka-Astro and later was produced in small series at Kamov assembly plant. The other variant of the Ukrainian power unit was MeMZ 247.1 This engine, which meets Euro-2 requirements, was not supplied for serial production, though on the secondary market it is rare to find such a configuration.

In 2007-2008, the factory in Serpukhov installed a Chinese three-cylinder injection engine, which developed 53 liters.с.

The sport variant of Oka uses the engine from Priora.

The tracked all-terrain vehicle based on the Oka uses an engine from the VAZ 2131.

As an option for garage tuning, there are several instances of cars using three-cylinder diesel Volkswagen.

Changing the oil in the gearbox of the Neva power tiller

It is also worth talking separately about changing the oil in the gearbox of a Neva motoblock. This should be done every fifty hours of operation. It is also important to check the oil level. A flat wire is suitable for this. You dip it in a container of oil and it should be wet for 25-30 centimeters. How to fill the gear oil in the gearbox of your Neva power tiller you will find out in the instruction manual. Most often it is transmission TAD-17I, TAP-15V and others according to GOST 23652-79.

Neva motoblocks, as well as the MK100 and MK200 power tillers are equipped with mechanical gear reducers, placed in aluminum housings. The MK70 has a mechanical chain reducer in a steel housing. To keep the gearbox long in service, regular maintenance is necessary. For diagnostics and troubleshooting contact authorized service centers.

How to choose gear oil

When selecting transmission oil for your gearbox please refer to the information in your tractor’s or power tiller’s owner’s manual. The use of oils other than those specified will result in accelerated gearbox component wear.

Product model Gear oils used Fill quantity in gearbox
MK70 rotary cultivator The gearbox is filled with Lithol-24 grease and does not require changing for the entire service life of the product
MK100 rotary cultivator is filled with Lithol-24 grease, which does not require changing during the entire service life of the product
MK200 tiller SAE85W-90 API GL-5 1,15 л
TM-5 GOST 17479.2-85
single axle tractor MB2 CS: GO ТСп-15К (80w90), 2,2 л
TEP-15 (-5°C to 35°C) GOST 23652-79 (SAE90 API GI-2),
TM-5 (-5°C to.25°С) GOST 17479.2-85 (SAE90 API I-5)
MB Compact single axle tractor SAE85W-90 API GL-5 1,15 л
TM-5 GOST 17479.2-85
TSp-15K (80w90)
single axle tractor MB2 TSp-15K (80w90) 2,2 л
TEP-15 (-5ºС to 35ºС) GOST 23652-79 (SAE90 API GI-2)
TM-5 (-5ºC to.25 TO 35) GOST 17479.2-85 (SAE90 API GI-5)
MB23 single axle tractor TSp-15K (80w90) 2,2 л
TEP-15 (-5ºС to 35ºС) GOST 23652-79 (SAE90 API GI-2)
TM-5 (-5°C to.25ºС) GOST 17479.2-85 (SAE90 API GI-5)
single axle tractor MB1 Multi-AGRO SAE85W-90 API GL-5 1,5 л
TM-5 (from.25 to 35) GOST 17479.2-85
TSp-15K (80w90)
single axle tractor MB2 Multi-AGRO SAE85W-90 API GL-5 1,5 л
TM-5 (from.25 to 35) GOST 17479.2-85
TSp.15K (80w90)
MB23 Multi-AGRO single axle tractor SAE85W-90 API GL-5 1,5 л
TM-5 (from.25 to 35) GOST 17479.2-85)
TSp-15K (80w90)
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How to change oil in the gearbox of a power tiller

The gearbox of the Neva MK200 motocultivator should be serviced every 250 hours of operation. To change the oil in the gearbox it is better to perform it immediately after the work of the equipment, because at this time it is easier to drain the oil.

To change the oil in the gearbox of your rotary cultivator, proceed as follows

  • Place the machine in an upright position
  • Place a container with at least 2 liters under the gearbox
  • Unscrew the breather plug, clean it from dirt
  • Remove the oil drain screw and drain the oil
  • After draining the oil, screw in the oil drain screw and the gasket, tighten the screw. Dispose of the oil at a used oil collection point.
  • Fill up with 1.15 l fresh gear oil of the correct grade and operating temperature through the breather plug
  • Screw in the breather plug.

How to change the oil in a motoblock gearbox

It is recommended to service the gearbox of your Neva motoblock after every 100 hours of operation or every season, whichever comes first. It is recommended to use only gear oil to fill the gearbox.

In order to change the oil in the motoblock gearbox, the following steps should be followed:

  • Place the single axle tractor in an upright position
  • Place a container under the gear unit: At least 2 liters for MB Compact, MB1 Multi-AGRO, MB2 Multi-AGRO, MB23 Multi-AGRO; at least 3 liters for MB2 CS: GO, MB2, MB23
  • Remove the breather plug, clean it
  • Remove the oil drain screw, drain the oil from the reducer
  • After having drained the oil, screw in the oil drain plug and gasket. Take the oil to an oil collection point
  • Fill through the hole under the breather plug with fresh gear oil of an appropriate brand and operating temperature of volume: 1,15 л for MB Compact; 1,5 л for MB1 Multi-AGRO, MB2 Multi-AGRO, MB23 Multi-AGRO; 2,2 л for MB2 CS: GO, MB2, MB23
  • Screw in the breather plug
  • Clean drive belt lever axle and sleeve of dirt
  • Lubricate the axle of the drive belt tensioning lever and the bushings with engine oil
  • Check the functioning of the clutch mechanism, adjust the tension of the drive belt
  • Lubricate clutch cable

Every piece of technical equipment is a complex structure, in which everything is interdependent. If you value your own equipment, you want it to work as long as possible, so you must not only look after it, but also buy quality parts, fuel and oils. But if you start using low-quality oil, then later you will face a number of complications and technology may need repair. In this article we will describe what oils (lubricants) are good for a specific unit and how to change oils in a power tiller.

Gearbox design on Neva power tiller

The gearbox on the Neva power tiller is responsible for the transmission of engine torque to the wheels and other attachments. It controls the rpm, speed and forward and reverse direction. In principle, there is little difference between the MB 2 and MB 1 gears, so we will look at the latter here. The design of the gearbox is such that on the outside of the housing are the components needed to change the gears.

Gearbox lever has 5 positions. When you push it, the fork disengages the clutch. When you drop the lever, the fork resumes its original position. The single axle tractor will pause when the drive is connected to the right half axle. The torque comes from the sprocket. When the handle is recessed, clutching the left sprocket, the transmission is downshifted. If you need a higher gear, the handle must be pulled all the way out.

changing, gearbox, neva, motoblock

Changing the oil on a Neva power tiller

It is worth noting that it is often quite problematic to select the oil and the implementation of the replacement process. That’s why many owners of Neva MB1 and MB2 power tillers ask themselves: “What oil to fill up the single-axle tractor Neva and how to do it??”.

Important point: the pouring process is the same for both models, only the types of oils for the gearbox are different:

Neva MB1 Transmission oil according to GOST 23652-79
Neva MB2 Transmission oil TEP-15 (-5°C to 35°C) GOST 23652-79, TM-5 (-5°C to.25°C) GOST 17479.2-85 according to the international classification system of special viscosity oils SAE90 API GI-2 and SAE90 API GI-5 respectively.

Repairs and malfunctions

If the need for repair work will require a complete disassembly of the mechanism. Full cleaning and draining of lubricant is also required beforehand. Only then is the unit disassembled and visually inspected with parts inspection. If there is a need to replace a part, you will have to buy a native element or an analogue that is provided for this model of Neva.

  • the spring or clamps are damaged. After replacement, readjustment is carried out;
  • The shifting system has a faulty setting. The screws are loosened and tightened again after engaging the first gear;
  • Oil starts to leak. Replacement of oil seals;
  • is jammed. Replacement of the chain is required;
  • no gear locking. Fork brushes need to be replaced.
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It is worth bearing in mind that most problems can be avoided if a full inspection and technical examination is carried out on a regular basis. It is also important to remember and not to violate all the prescribed conditions of operation.

Gearbox of “Neva MB-2” motoblock: scheme and device, purpose and rules of operation

The gearbox is an indispensable component of any machine where a motor is used, since without it the rotary motion cannot be transmitted. Structurally, this element in “Neva-MB-2” motoblocks is similar to the parts used in other equipment, but to learn more about it, it is necessary to study the issue in more detail.


The design of motor-block has a gear-chain unit, whose main task is to transfer rotational motion, and hence change the speed of the mills. Just because of the gearbox from the driven pulley mechanical action is transferred to the wheels of equipment, by which the speed and direction change.

Inside the housing is oil, which is necessary to ensure the functionality of the gearbox. The element is enclosed in a hermetically sealed housing. Its kinematic scheme consists of a chain and two stars, located in opposite directions. The lower one is called a slave, because it stands on the shaft and drives the entire motoblock system.


The motoblock gearbox includes the following important parts:

  • screws;
  • bearings;
  • axles;
  • sprockets;
  • housing;
  • grommets;
  • shift levers;
  • gears;
  • shaft;
  • coupling;
  • halves;
  • board;
  • spring.

These are not all the elements that are involved in the design of the gearbox, but they are the main. Failure of one of them leads to loss of performance and subsequent repair.

Compared to a worm gearbox, a chain-wheel gearbox is more reliable. It is convenient and easy to use; it can support the reversing function. It is a collapsible unit, where all the elements are bolted together so that the chains and pinions can be inspected as needed. Such gearboxes are installed on large motor blocks, which need a solid and reliable unit to transmit the force to the wheels and cutters.

The most simple and common cause of failure is a broken or sprained chain, but the problem can be solved by any user without calling a service center.

What to do

To reduce the risk of damage to your power tiller as much as possible, not only the engine but also the gearbox must be monitored. Experts also give their recommendations on the most important rules to adhere to when operating a tractor.

  • It is essential to use only high quality oil and to check regularly that it is still in the element. According to GOST, TAD-17I or an analogue, which can also be easily found in stores. TAP-15V is ideal for this gearbox.
  • A complete oil change should be done after the manufacturer’s prescribed engine hours. The instructions for users state that the gearbox must be replaced after 30 hours after the first start of the power tiller and after 150 hours thereafter.
  • If a single axle tractor is placed on conservation, all working fluids are removed from it, and the necessary moving elements are lubricated.
  • From time to time the user is required to check the degree of tension of the gearbox chain. If it sags, it is replaced with a new one, as this element cannot be repaired.
  • The oil seal can be replaced by the customer due to the fully demountable construction of the machine.

Possible breakdowns

It is worth saying that the reducer from the motor-block “Neva-MB-2” can be repaired quickly and easily. This is possible due to the fact that you can always find spare parts for it on the market. It is necessary when the following signs appear:

In all of these cases, it is necessary to disassemble and inspect the gearbox. If the oil leaks, the problem can be solved by simply replacing the cuff, which over time can lose its original qualities. Jamming is always caused by a broken chain, so it can only be repaired by a complete replacement. If this element is intact, but there is no kinematic connection, it is worth paying attention to the sprockets present in the structure. One of them might have been a bummer.


If there is no gear shifting, the dryer is inspected and may be destroyed. Sometimes the threaded part of the handle is cut off. If the user began to notice that oil leakage is observed on the shift shaft, it is not always an indication of a breakdown. Sometimes the allowable oil level in the gearbox is simply exceeded. The excess must simply be drained off.

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