Oil seal on single axle tractor Neva how to remove

How to adjust the carburetor

Another type of adjustment, which will need to be carried out, is the adjustment of the carburetor of the motoblock “Beam”.

For a stable operation of the combustion engine, its moderate fuel consumption and smooth running at increasing load, you need a fine-tuning of the carburetor.

After it, you will notice a change in the performance of the motoblock, and it will be for the better, as the injection stabilizes.

  • Before adjusting the carburetor you need to carefully tighten the two screws. the main jets and the idle speed jets up to the stop.
  • Then you need to turn them in the opposite direction, about one and a quarter turn.
  • Next you need to start the engine so that it warms up. The normal operating temperature will be reached in twenty minutes. When this happens, you need to move the throttle lever to the “min” position.
  • Use the screw to set the minimum, but stable idle speed. The same action should be repeated for maximum speed.
  • Repeat the setting of the minimum frequency, which will be stable.
  • Then. to repeat the setting of the maximum stroke frequency, thus ensuring the smooth and stable operation of the whole machine.

seal, single, axle, tractor


Despite all the convenience of using equipment like a motor block “Beam”, thanks to its simple design, and as a consequence, a high “survivability”, it needs frequent adjustment. Such a need was a consequence of all the same simplicity of mechanisms, which from constant work become loose and shifted.

But it is not particularly difficult to “bring the Luch” MB 1 singleaxle tractor. The carburetor is relatively simple in both adjustment and repair, and even after a brief acquaintance with its design, the repair will not be so difficult.

How to choose the right ignition

Operation of any appliance begins with the starting of the engine and the ignition system should work as well as a Swiss watch.

But in the case that the functionality of this element, one way or another, is impaired, it is necessary to carry out its adjustment.

Before you set the ignition on a motorblock Luch, Don, Huter, Pro, LANDER, Champion, you need, first of all:

  • Check the plugs. They are the main cause of failure of this system. It is also always recommended to have a spare spark plug with you, just in case manipulation, cleaning, will not help. What to do with the spark plug is to unscrew it and wipe the electrodes and remove the soot from them.
  • Next, you need to set the gap between them.
  • Next, put the angle wire on the candle, and its body securely pressed against the cylinder, its head, while turning it away from its same hole, which is in the cylinder head.
  • It is necessary to crank the crankshaft. It is possible to cope with this with the help of a starter cord. In a faultless system, the spark that strikes between the electrodes should be a light blue color. If it is absent or has a white-yellow color, the system is defective.

In this case you can check the gap between the stator and the flywheel magnetic shoe, it should be from 0.1 to 0.15 millimeters.

After these simple manipulations you will get a perfectly working single axle tractor “Luch”. Installation of the ignition on it is as simple as its adjustment, because it consists of several parts, which are connected like constructional parts.

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All the grooves are designed in such a way that nothing can be mixed up, the plug not inserted the wrong way round or the cables not connected correctly. Once you have made the adjustment of the ignition of the “Beam” motoblock, and this part of it works properly, you can proceed to the adjustment of the next important node of the engine.

Gearbox tools

Note that you must not forget to change the oil in the gearboxes. If you miss this point, after some time the additives lose their properties. To increase the service life it is necessary to protect their characteristics with oil. Its untimely replacement can cause foaming of the agent, as a result of which the gearbox will be jammed.

Before changing the oil, you must check the previous level, then take out the oil dipstick and clean it with a soft cloth. The gearbox of the monoblock should be filled with oil to a medium level.

Oil is the key to long gearbox life. In looking for the best product, be sure to read the manual. It is important to consider under what conditions it will be used. The most popular is Motul oil, which is used by almost all the owners of power tillers.

Oil Seal Removal and Installation

Belts on power tillers Neva: types, sizes, independent tensioning

The Neva series power tillers are an indispensable partner in the garden and vegetable garden. Performing many functions, with frequent operation they experience considerable overload, contributing to the appearance of malfunctions. Among the possible problems that can occur with the cultivator type “Neva”, users often face the breakage of transmission belts.

Remoteness from service centers, the need to quickly resume the work of the unit and the desire to save money on consultations of specialists push the self-repair of the cultivator at home. For its successful implementation will require little, as you will be convinced by reading this material.

Main malfunctions

The cause of repair of the Neva MB-2 power tiller may be:

  • improperly adjusted valve belt;
  • Gearbox failures;
  • Gearbox oil seals;
  • Incorrect adjustment of the carburetor system;
  • not aligned ignition;
  • spark plug malfunctions.

Belt adjustment and dimensions

The V-belt on a power tiller helps the machine move forward and backward. When the drive belt slips off, the equipment ceases to function properly.

In order to determine the size of this part, it is necessary to measure the gap from the pulley to the rollers. Recommended belt parameters: width. 0,85 cm, height. 0,6 cm.

To tension the belt, it is necessary to do the following manipulations:

  • Remove the shroud.
  • Loosen the tensioning screw of the original belt part.
  • Remove all the screws that hold the bracket to the body of the power tiller.
  • Pull out the old part and adjust the pulleys.
  • Wipe the place between the parts and blow out the rods.
  • Install a new belt, one end of which should be connected to the shaft part and the other end to the pulley.

Replace gearbox glands

Improperly functioning oil seals could be the cause of gearbox failure. Therefore, the repair of the gearbox of a Neva motoblock can include the following actions:

  • Dismantle the cutters from the shaft part.
  • Clean the shaft and cover of dirt and oil residue. Remove all screws from the cover and wash them.
  • Replace the old part with a new one and wipe the entire mechanism dry.
  • Replace the cover and fasten it with the screws.

In some cases it is necessary to disassemble the gearbox:

  • Remove the head from the shift knob.
  • Remove sleeve and spring from the shaft end.
  • Remove all the screws and bolts.
  • Use a thin screwdriver or a knife to remove the right half of this part.
  • The removed parts should be washed, and the defective ones should be replaced.
  • Reassemble the reducer in reverse order.
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Repair of the gearbox of the Neva MB-2 power tiller with your own hands

Gearbox of the motor-block Neva MB-2 has a fairly simple design, and its repair usually does not require certain skills. Pay attention to the following signs indicating that the unit is broken:

  • Oil leakage on the output shaft of the reducer;
  • Gears are no longer shifted;
  • Lack of kinematic coupling;
  • Transmission chain starts to jam.

If any of the above problems occur, it is necessary to disassemble and inspect the mechanisms of the device.

  • If oil leakage is noticed, it is an indication of a worn oil seal or excessive lubricant. It will be enough to drain the excess oil, and if the gasket part is worn, it will need to be replaced.
  • If the chain is jammed, you will need to put a new one, as worn out or broken chain can not be repaired (you can try to weld the links, but in this form detail will not last long).
  • If visual inspection shows that the main gear element is intact, but there is slippage or no kinematic connection, you should pay attention to the sprockets. One or more of them may be cracked or broken. Replacing them can fix the problem.
  • When you have trouble shifting gears, the shift shaft bumpers are probably destroyed, or the handle threads are sheared off. In this situation, replacement of parts with new ones, or taken at disassembly from a similar gearbox will also help.

Before you start to disassemble the unit yourself, study detailed video instructions from experienced craftsmen, as any error in the repair, made by inexperience, can lead to an even bigger problem and the need for costly repairs.

Setting the carburettor

Before adjusting the carburettor, adjust the centrifugal regulator according to the operator’s manual.

  • Screw in the bolts for the low and full throttle to the maximum, and then unscrew them by 1.5 turns.
  • Set throttle valve so that there is a gap of appropriate parameters between base and air duct.
  • Try to start the engine. If it starts, you need to wait for it to warm up.
  • Adjust throttle to minimum rpm with the control knob.
  • Set minimum idle speed with the choke adjustment knob.
  • Set the throttle to maximum rpm with the throttle trigger screw.
  • Repeat the last 2 steps until the engine runs smoothly.
  • Turn the control knob to the throttle.

Adjusting the valves

To adjust the valves on the Neva power tiller, proceed as follows

  • Install the unit on a flat surface.
  • Start the engine and let it cool down.
  • Remove the bonnet.
  • Remove the cover from the valves to allow access to the parts underneath.
  • Unscrew the lock nut.
  • Make adjustments. Loosen the nuts, insert the dipstick and adjust the valves.
  • Screw the valve nut back on.
  • Insert a razor blade (no thicker than 0.2 mm) into the gap that is formed. It must slide freely between the piston and the valves of the power harvester.
  • Screw all the parts back in.

The gap must be checked using a feeler gauge which must pass under the valve when the cut is made correctly.

Check and adjust the clutch

  • When the clutch handle is in the “off” position.”Loosen the rope. The tensioner moves to the bottom position and makes contact with the drive belt.
  • When handle is in the “On” position.”, the cable tightens the roller and the lower part of the belt is pressed tightly against it. The smaller pulley transmits momentum to the larger pulley so that power is transferred.
  • If 2nd gear kicks in when the clutch lever is engaged. It must be moved to the correct position. To do this you must place the V-belts in parallel on both sides of the motor pulley.
  • If the 2nd gear is kicked out when the clutch lever is engaged. You must constantly monitor the position of the V-belts, they must be parallel to each other.
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How to set the ignition

Before carrying out the procedure, it is advisable to make sure that the design can cause a spark that will provoke the ignition of the fuel in the combustion chamber.

Procedure for adjusting the ignition of a power block:

  • Turn the crankshaft so that the marks made on the pulley and the gas equipment of the machine coincide.
  • The runner, which is responsible for the distribution of gas flows, should be directed to the high-voltage wire of the cylinder part.
  • Loosen the nut and remove the high-voltage wire from the cap.
  • Place the contacts at a distance of 0.5 cm from the technique.
  • Turn the ignition.
  • Turn the mechanical construction in the opposite direction.
  • After the spark appears, quickly tighten the screw.

Trouble with the plugs

First, it is recommended to make sure that the spark plugs are in good working order. To do this, it is necessary to:

  • Unscrew the spark plug element.
  • Clean the electrodes.
  • Remove the carbon deposits.
  • Turn the crankshaft to a position where the pulley and gas device marks are aligned.
  • Point the slider at the high voltage surface of the cylinder.
  • Loosen the screw and remove the wire.
  • Turn the ignition key. If there is no spark, then the spark plugs are faulty and should be replaced. Before installing a new element, make sure there is no sealing washer from the previous part in the cylinder head.

You should also check the parameters of the gap between the electrodes of the plugs:

Model of plug part The gap
A11P 0,5÷0,6 mm, size. 2,8 cm
NR17C 0,5÷0,6 mm, the size. 2,8 cm
WR8AC 0,5÷0,6 mm, size. 2,8 cm

Why does the car not start, why does it fire, why does it smoke, and what can be done about it?

It is recommended to do the engine repair by your own hands only after expiration of the warranty.

If the motor does not start, the cause may be the following:

  • No spark. In this case, it is recommended to take out the spark plug element and insert it into a special candle holder and place the housing on the cylinder. After that you need to start the engine. If the spark did not appear, it is recommended to replace the spark plug.
  • Fuel does not reach the engine. It is necessary to examine and blow the hose which connects the carburetor and the tap. If necessary, you can disassemble the carburetor and wash it from the inside with A-95 gasoline.

If the power tiller smokes at idle speed, you need:

If the engine fires, it may be caused by the tension of the working spring. If there are any malfunctions it must be adjusted.

How to install an alternator

In order to install the electric generator, the following must be done:

  • The alternator has 4 wires, 2 of which are blue. An energy converter must be connected to these 2 wires.
  • The black wire should be connected to the motor.
  • connect the remaining red wire to the parts responsible for the exterior lighting and the horn.

The generator generates energy of the electrical type, which is fed to the rectifier. During the start of the motor, the adjusted belt transmits the torque to the rotor part of the unit. The power unit generates the voltage that powers the battery of the power tiller.

The power of the selected alternator must not exceed 220V. It is recommended that you choose a part whose power will match the intended load.

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