What is the belt size for the Neva single axle tractor

How to change the drive belts on “Neva” MB-1 and MB-2 power tillers: step-by-step instructions

Based on the differences in the location of the belts on these two motoblocks, let’s consider the processes separately.

For “Neva” MB-1:

• disconnect the shield, for which unscrew 2 bolt ties and remove the protective cover from the reducer pulley;
• not completely unscrew the guide pulley connection;
• smoothly take off the reverse belt;
• we loosen the ties, push back the pin-restrictors and remove the belt of the front gear;
• take new serviceable belts and apply them to the stream grooves of the required pulleys. After that, fasten them with the bolts that were removed in the previous stages.

“Neva” MB-2:

• disconnect the shield and casing;
• take out the spring that secures the tensioning;
• Unscrew screw fasteners and unscrew the stops, that keep the belt on the pulley. Before proceeding to the next step, make sure that the motor shaft and the gearbox are in the same plane. According to instrumental measurements, the flatness between them should not go over the limit of 0.01 cm;
• Adjust the belt pulleys if necessary. The easiest way to accomplish this is to move the motor in a longitudinal plane;
• adjust the tensioning pulley by adding or removing the element between the disc and the bracket
• Install the belt to the “Neva” MB-2 motor-block, starting from the gear part.

Further assembly of the V-belt mechanism is performed in the sequence reverse to the disassembly process. An important point that is often overlooked by users is the gap between the guard and the belt. According to the technical documentation, it should be at a level of 2-3 mm.

Another fact is also important. If your power tiller has 2 belts but only one is worn out, you will need to replace both. If this is not done, the new cord that has just been installed will be under more strain than the old one and wear out sooner than it should.

Belt selection on a single axle tractor

Each part of a power tiller must be of good quality, only then the farmer has the opportunity to use this equipment for several years without replacing any parts. The belt on a single axle tractor is often considered to be one of such elements that play an important role in the machine’s work. It cannot be said that this part, even if it is extra high-quality and expensive, will considerably increase the functional condition of the equipment.

The main purpose that the manufacturers had in mind was to realize the potential of the engine block, but not to raise its performance to a higher level. Belts are usually made of materials such as polyurethane or neoprene. This is due to the fact that they are considered wear-resistant, as well as durable. But even such products can stop withstanding high loads as they are used, and tear as a result.

Before selecting a belt, read up on their characteristics

Maintenance rules

You want your power tiller pulley to work for a long period of time? To do this, carry out certain procedures.

• Regularly check the strength of the attachment of the part on the engine, so that the mechanism is not out of order and does not loosen.
• You should inspect the idler pulley or master pulley before each use to clean the covers to protect the part from dirt and other foreign matter.
• Carry out self-diagnostics of the assembly, so that there are no chips and cracks.
• You also need to observe safety precautions when working with a pulley for a motorblock.

Regular procedures can save you money on repairs and prolong the life of the machine.

How to tension the belt on the Neva MB-2 single axle tractor with your own hands

In order to replace this structural element, you do not need to go to a specialized service. All work can be done by yourself in a fairly short period of time. Let’s look at the step-by-step algorithm of actions, by which the replacement of the belt on the motor-block brand Neva is carried out:

• first of all, you need to dismantle the old consumable element, if this has not been done before;
• in general, disassembly begins with a step-by-step disconnection of the protective shield, as well as the main casing;
• It is mandatory to remove the spring, due to the work of which the tension is carried out;
• then unscrew the screw fasteners, as well as unscrew the limiters that hold the drive belt on the engine pulley;
• Next, make sure that the motor shaft knobs as well as the gearbox are in the same plane;
• here is allowed a slight discrepancy, which does not exceed a minimum value of 0.1 millimeter;
• if necessary, adjust the pulleys (move the motor in the longitudinal plane for this purpose);
• then the idler pulley must be adjusted so that sufficient tension is subsequently created;
• To finish the procedure a new belt must be installed (start putting on the element from the gear part).

After that it is required to perform the procedure in reverse order, which preceded the procedure of installation of a new belt on the single-axle tractor brand Neva.

Important! When performing the work it is required to do everything carefully and in stages, otherwise there is a risk that the new consumable element will break or the drive mechanisms will be damaged.

The importance of the drive belt in the construction of Neva cultivators

The design of modern “Neva” motor-blocks is quite simple: there is a welded frame (bearing part) in which the motor is localized, the revolutions from which are transferred to other components through shafts. The running gear is usually represented by two small wheels. All actuators are operated by means of levers on the handles.

Any single-axle tractor “Neva” contains 2 varieties of shafts

The task of the drive train is to transfer revolutions from the crankshaft to the distribution unit.

Depending on what acts as a belt, the drive is:

• chain. represented by an articulated chain connecting the drive sprocket and the driven sprocket, between which the traction potential is transmitted;
• Belt-driven. transfers power via frictional forces.

The first ones are less demanding in maintenance, do not require tensioning and with their compactness provide good performance data. The price and simplicity of the belt drive compensates for their wear and the large size of the machines.

With the abundance of modifications, issued under the label “Neva“, they all belong to the group of equipment with belt drive. An important advantage of these cultivators is the top arrangement of the spreader shaft, which contributes to more effective cooling and therefore less wear of the belts themselves.

Varieties of belts

Drive elements are installed on power tillers, which provide easy starting of the device, allow to move smoothly, as well as replace the clutch.

In this case, they may differ in the following parameters:

It is worth noting that today you can find different types of belts on sale, which can be:

Before buying each individual belt, it is necessary to determine in advance its correspondence with the model of equipment used. It is not advisable to use an old tensioner for fitting, since its dimensions have changed during use.

CARRARO AXLE KING PINS REPLACEMENT DISASSEMBLY AND ASSEMLY ; СНЯТИЕ И УСТАНОВКА ШКВОРЕНЬ НА МОСТ

It is better to purchase MB-1 or MB-23 belts, which are produced specially for your model of machinery.

You can determine the correspondence on the website of the manufacturer of the equipment, on other resources, consulting with specialists

How to choose a belt for your Neva power tiller?

To choose the right drive belt for popular modifications of Neva motor-blocks, it is necessary to strictly follow the instructions described by the manufacturer in the manual. There are several important points to consider before buying items:

• The length of the drive belts. can vary depending on the purpose and location of the elements in the overall design of the motor-block;
• brand-manufacturer. experienced users advise to give preference to products designed by famous brands. It is not recommended to buy parts of unknown brands due to their unreliability and low resistance to wear;
• Cost. it is important to choose original elements. The price for them can be several times higher than low-quality copies, but it will pay off in the form of increased reliability and durability of branded parts;
• marking. in order not to make a mistake when choosing a new belt, it is necessary to study in advance the number of the element that was installed on the single-axle tractor.

When choosing drive elements, you should not try to compare the level of tension of old and new belts. This will not bring results, and in some cases will encourage the user to buy too long a part.

Service

Timely maintenance helps to keep the machine in top working order. For troubleshooting of the Mole cultivator the instruction manual will help.

• cylinder head cleaning. The part is washed and dried;
• fouling is removed from the cylinder;
• ducts as well as the muffler and carburetor are cleaned with fuel;

Carburetor

• replacement of the oil seal should be carried out after complete disassembly of the gearbox;
• Use a rag soaked in gasoline to remove the soot from the muffler.

Following these procedures will keep your machine in working order for years to come.

Belt tension of Neva motoblock. how to do it correctly?

Immediately after replacement, the belt on the Neva power harvester must be readjusted.

To do this properly, the operator will need:

• Carefully inspect the current pulleys and make sure there is no debris or corrosion on them. If they are there, then this will need to be corrected;
• Unscrew the fastening nuts with a special wrench, that will allow the operator to free the engine part of the power tiller and move the engine freely in its longitudinal plane
• Install a wrench for 19 on the threads provided on the surface of the built-in adjusting screw;
• To move the engine of the power harvester closer or to move it back as it is necessary for the tensioning of the drive element to be used;
• Slowly tension the belt on the Neva power tiller. The main thing is not to overtighten it, otherwise it will lose its working parameters;
• Inspect the belt and make sure there is no misalignment, otherwise the element will fly off the pulley surface or jam;
• Turn the adjusting screw in the opposite direction, fixing the belt firmly in the structure of the agricultural machine;
• Screw in the previously unscrewed fastening nuts.

When adjusting the belt tension on MB-1 and MB-2 motor blocks, it is important to make sure that the belt is not just overtightened.Too little tension can also cause numerous problems:

• Increased vibration on one side of the power tiller. this will not only degrade the quality of cultivation, but also gradually put the equipment out of operation;
• an increase in the volume of exhaust gases when the power unit works at idle;
• Constant wheel slippage, even when moving on a flat asphalt surface. this will increase the wear of the tires and reduce the performance of the Neva motoblock;
• If you notice a blue residue on the surface of built-in pulleys, this may be the cause of pulley failure.

It is important to remember that after changing the belt you need to run it in. This will require you to start the single axle tractor and let it run for a while without load. After that, the pressure on the structure can be gradually increased.