How to choose the right camshaft on the power tiller

MB 1 single axle tractor mounting the camshaft. Adjusting your motoblock’s valves is an important operation for the engine’s longevity. Setting up and checking the ignition for the Neva motorblock

Today, more and more people who use power tillers on their plots. This is not surprising, because this technique can do absolutely everything: to plow the land, plant and harvest potatoes, move cargo, and even remove the snow. However, like any other machine, power tillers sometimes break down and need to be repaired.

In this article we will consider the ignition system of a power tiller, the types of its failures, ways to fix them, as well as the process of adjusting the ignition. And if this is where the cause of failure is to be found, you can easily fix it.

Variety

Manufacturers make three types of pulleys for power tillers:

  • Discs. have a size from 8 to 40 cm;
  • With spokes. have a diameter of 18 to 100 cm;
  • monolithic. the two-handled ones have a size of 3 cm, and the three-handled one 10 cm.

There are two types of seating holes:

All pulleys have 8 recesses, on the quality of grinding which depends on the wear rate of the working belt.

Types of pulleys depending on the type of gearbox:

For power tillers with attachments you need to buy pulleys with a diameter of 19 mm, and for more complex speed machines you will need pulleys with a diameter of 13.5 cm.

Self-made

If you can’t afford to buy a ready-made pulley, masters of trade advise to make this part on your own.

To make a slotted pulley at home you need a lathe and a metal workpiece. For help, you can go to a turning shop, where professional turners will certainly help you turn the necessary part.

If you can not get a metal workpiece specialists advise to use a piece of plywood.

  • Acquisition of the necessary workpiece;
  • Drawing a circle of the desired diameter;
  • Drilling the center hole;
  • sawing out with a jigsaw of a circle strictly along the planned line with an indent from the line on 20-25 mm;
  • Grinding the resulting workpiece with fine sandpaper;
  • cutting a groove for the belt with a cutter of the required size;
  • installation of the finished product in a single-axis tractor;
  • Eliminate all defects and inaccuracies.

This detail from plywood has a short service life and requires constant checking and replacement if necessary.

Only those motor blocks, in which this manipulation is provided by the developers, can be fitted with self-made parts.

Experts recommend resorting to self-made pulley only in the most extreme cases and if it is possible to immediately replace the part, manufactured in industrial conditions on special equipment.

To extend the service life of your power tiller, experts recommend knowing and applying a few basic rules for pulley maintenance:

  • regular checking and cleaning of the guard from stones, dust particles, soil and other debris;
  • checking constantly that the part is securely fastened to the axis to prevent thread wear;
  • compliance with all rules and regulations for the operation of the electrical device;
  • checking the alignment with a laser level;
  • check the device for mechanical damage, as well as cracks and scratches.
choose, camshaft, power, tiller

To prevent development of corrosion processes after operation the single axle tractor must be placed in a dry and ventilated place protected from precipitation.

To remove the pulley and fix the runout of the starter, you must first reduce the stroke, reduce the speed, and then stop the machine completely.

Before starting the planned work process it is absolutely necessary to check the condition of all the elements of your power tiller to avoid unpleasant situations that can lead to the damage of the whole power tiller.

Experts recommend regular comprehensive inspection of the entire apparatus, which will certainly have an impact on the life of all parts, including pulleys.

The main activities of a comprehensive technical inspection:

  • regular cleaning of all working units;
  • checking the air filters;
  • regular replacement of deformed parts;
  • checking the spark plugs;
  • oil change;
  • Lubrication of control system parts;
  • adjustment of the clutch;
  • muffler replacement;
  • belt tension adjustment.

The single-axle tractor is a versatile machine used not only by farmers, but also by ordinary residents who have homestead plots. This unit is a multifunctional device that gives you the opportunity to remove snow, mow grass and lawns, transport cargo, pump water and clean the streets. For various types of work, simply changing attachments is sufficient. This process takes a small amount of time and has an uncomplicated technology. Stable operation of the machine is ensured by a large number of different parts. One of the most important elements in a power tiller is the pulley. The simple round piece is the link between the engine and the moving elements. It is the work of the pulley that determines the whole process of performing the work.

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How to put a camshaft on a diesel engine

The camshaft, or camshaft for short, is one of the key components of the timing system in a car engine. The camshaft has cams, and their number corresponds to the number of engine cylinders. Due to rotary motion transmission this element provides a certain coordination in the work of valves and pistons. So having the knowledge of how to adjust the camshaft, it is possible to adjust the correct operation of the engine, which would suit your conditions. It is often the case that the camshaft is subject to various types of deformation, which, one way or another, is associated with wear of cams and bearing journals.

Deformation is a rather unpleasant and very important point, so even in the case of grinding the camshaft, you should remember about balancing. It’s all about the fact that it is the manufacturer, so in order to properly install the camshaft, you need to be at least a good specialist. The essential thing in this case is the absence of any run-out. The reconstruction of the camshaft is possible, but the process is quite time consuming and has some peculiarities that can not be performed by “just anyone”, only a professional can perform this kind of work. In some cases, the camshaft can be straightened and ground, but when it comes to installing and adjusting the camshaft. problems begin, since the cams are located in different planes, and then there is a difficult spatial problem.

The most common and at the same time the easiest way to restore a deformed camshaft, is to apply pressure to the point where there is a distortion. Everything would be okay, if it were not for the difficulty of determining this place of deformation. On top of everything else, camshaft straightening is performed using the chamfering method. That is, by creating deformation stress in some places of the camshaft. Sometimes heating helps, but no matter which of the above methods you choose, none of them will give you a 100% guarantee that after a while it will not take a curved position again.

What is needed in order to align the camshaft correctly.

To properly set the camshaft, first it would not hurt to properly remove it

Disassembly of VAZ engine.

Part 1.

And so the disassembly of the engine VAZ. When the time comes to overhaul the engine, then immediately you think, but how to repair it? To give to craftsmen, but then the budget of this measure greatly increases or to do the repair yourself. In the previous article, we provided detailed material on how to remove the engine, and next we will take it apart. Usually disassembly of the engine VAZ, occurs for the following, the main reasons: engine knocking, wear of piston groups, damage gaskets under the cylinder head and many other malfunctions, which require disassembly of the engine VAZ.

In this article we will describe how to disassemble the engine correctly, so that every driver can do the disassembly himself.

In this case, the swivel device to which the engine is attached for disassembly will help us nicely.

To begin with let’s take off all attachments and start with the gas pump. A screwdriver releases a clamp and removes the fuel hose from the gas pump. Using a thirteen-nut wrench we undo the two nuts that fix the pump and remove it from the engine. Then, after prying lightly with a screwdriver, remove the intermediate tappet of the gasoline pump.

Disconnect the armored wires from the spark plugs, as well as the rubber tube of the vacuum ignition timing regulator. What would remove the distributor of the ignition, it is necessary to unscrew with a thirteen wrench the nut that fixes it. We remove the fixing bracket and take out the distributor.

Now let’s take care of the generator. First loosen, and then unscrew tensioner nut. With a little effort move the generator to the engine and remove the belt. Next, unscrew the nut on the bottom bracket of the generator and remove the bolt, the generator will remain in your hands.

Next, let’s take care of the water pump (pump). Disconnect all water pipes from the carburettor. Using a socket wrench unscrew three fixing bolts. Once you have removed the fixing bolts, gently tap the pump with a hammer. Why do we need to tap? Because the pump could be stuck to the block.

We go to the other side and take a look at the oil filter. If the oil filter can not be unscrewed by hand, then use a special tool to unscrew it. It is no longer suitable for further use and just throw it on the trash.

Unscrew the nut with a thirteen wrench, remove the breather cap in the place of the dipstick.

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The only thing left to remove on this side is the oil pressure sensors. Carefully, so as not to damage the sensors, unscrew them.

Next, we need to remove the crankshaft drive pulley. To remove it, we need to fix the crankshaft. We put a bolt in the hole to mount the engine to the gearbox and fix the crankshaft with a small crowbar or a big screwdriver.

After fixing the crankshaft, unscrew the nut or the ratchet, depending on what make of car. Then we use a bottle wrench to gently pry open the pulley and pull it off.

Turn the engine over and take off the flywheel. Once again, after fixing the flywheel, undo the six bolts that secure the flywheel. Remove the bolts and check washer. Next, remove the flywheel itself.

The tin plate needs to be removed. Using a ten-mm wrench we unscrew the two bolts and remove the plate itself.

We have removed all the attachments from the engine and now we will proceed to the disassembly of the engine VAZ. Complete disassembly of the engine VAZ, we will conduct in the second part.

Belt tensioning of the Neva motoblock: algorithm of actions

The Neva MB-2 and MB-1 are characterized by a different location of the belts. Therefore, and the scheme of installation of parts will be different.Belt tensioning on the model MB-1 is carried out in a certain way:

  • Initially, the casing is removed from the V-belt mechanism;
  • Carefully remove the backstrap from the pulley;
  • Use a wrench to loosen the spring-loaded roller;
  • The old element is disassembled and the new element can be installed;
  • The previously disassembled spare parts of the machine are installed.

It is worth considering how to replace the belt for units of the model range MB-1:

  • Removed the shield and the cover of the V-belt system;
  • The pulley bolt is loosened and the reverse belt is removed;
  • Loosen the bolts that secure the bracket;
  • The front drive belt is removed;
  • New elements are installed and stretched, everything is secured and previously removed parts are put back in place.

Belt adjustment on the Neva MB-2 power tiller is done as follows:

  • The cover is removed;
  • The screw loosens the tension of the original belt;
  • All the screws that hold the bracket to the machine body are removed;
  • The old part is pulled out and the pulleys are adjusted;
  • Before putting the belt, the places between the elements are thoroughly wiped, the hoses are blown;
  • A new belt is installed. One end is connected to the gearbox shaft, the other. to the pulley, which is in the motor;
  • Design can be completely rebuilt.

details about how to tension the belt on the Neva motoblock, it is worth learning from the proposed video.

Basically, a new element is stretched when the motorblock breaks down. Much rarer replacement beforehand to prevent malfunctions during machine operation. In any case, you need to perform work on replacing the belt carefully, because if you overtighten it, its breakage is inevitable.

Self-made

If it is impossible to purchase a ready-made pulley, professional craftsmen advise to make this part themselves.

To make a slotted pulley at home you need a lathe and a metal workpiece. For help, you can turn to lathe workshops, where professional turners will certainly help to turn the necessary part.

In case it is impossible to get the metal workpiece, experts advise to use a piece of plywood.

  • acquiring the necessary workpiece;
  • Drawing of the circle of necessary diameter;
  • drilling out the center hole;
  • Sawing out a circle with a jigsaw strictly along the planned line with an indent from the line on 20-25 mm;
  • Grinding the resulting billet with fine sandpaper;
  • Cutting a groove for the belt using a cutter of the required size;
  • installing the finished product in a single-axle tractor;
  • Elimination of all defects and inaccuracies.

This plywood part has a short service life and requires constant checking and replacement if necessary.

Only those motor blocks in which this manipulation is provided by the developers can be fitted with self-made parts.

Specialists recommend to resort to the self-made pulley only in the most extreme cases and if it is possible to immediately replace the part that was manufactured industrially on special equipment.

To extend the service life of your power tiller, experts recommend knowing and applying a few basic rules for pulley maintenance:

  • regular checking and cleaning of the pulley guard from stones, dust, dirt and other debris;
  • Constantly checking that the part is securely fastened to the axle to prevent thread wear;
  • compliance with all the rules and regulations for the operation of the electrical device;
  • Check the alignment with a laser level;
  • check the device for mechanical damage, as well as cracks and scratches.

To prevent development of corrosion processes after operation it is necessary to put the single axle tractor in a dry and ventilated room, protected from various precipitations.

In order to remove the pulley and fix the runout of the starter, you must first reduce the stroke, reduce the speed, and then completely stop the machine.

See also  How to change the rings on a power tiller

Before starting the process of performing the planned work it is necessary to check the serviceability of all elements of the power tiller to prevent unpleasant situations that can lead to a breakdown of the whole power tiller.

Experts recommend regular comprehensive inspection of the entire machine, which will definitely affect the service life of all parts, including pulleys.

Main activities of a comprehensive technical inspection:

  • Regular cleaning of all working parts;
  • checking of air filters;
  • regular replacement of deformed parts;
  • inspection of spark plugs;
  • oil change;
  • Lubrication of control system parts;
  • clutch adjustment;
  • replacement of the muffler;
  • adjusting the tension of the belts.

How to set the ignition on a power tiller

Consider how to adjust the ignition of your power harvester. The ignition system of a power tiller is quite simple. Before carrying out the installation of the ignition, it is important to make sure that this design forms a spark, which in turn will cause the ignition of the fuel fluid that is in the combustion chamber.

To avoid going to specialists for nothing and save your money, you need to understand how the ignition adjustment and ignition coil settings are made. Let’s consider how to set the ignition on a single-axle tractor MB 1 and MB 2.

The ignition can be set by means of a spark. It is necessary to turn the crankshaft so that the marks of the pulley and the gas mechanism coincide. The slider that distributes the gas flows should point to the high voltage wire of the cylinder.

It is necessary to slightly unscrew the nut that changes the position of the mechanical structure, which determines the moments of the high-voltage pulse.

Then it is necessary to take out the high-voltage wire from the system cover. It is in its center. Then place the contacts at a distance of 5 mm from the engine.

After that you need to switch on the ignition.

All this must be done with the utmost care, the mechanical construction must not change its position in relation to the power tiller.

There is a spark between the central high-voltage wire and the mass of the motor cultivator. Then the shear nut must be tightened quickly to prevent an ignition.

You can check the ignition by making a sound. If the owner has a good enough hearing, then this method of checking and adjusting the ignition is quite suitable. In other words, it is a non-contact check of the spark plugs.

The non-contact method assumes the following procedure:

  • First start the engine.
  • Then you need to loosen the tumbler a little.
  • Swivel the breaker bar slowly in two directions.
  • The mechanical structure, which determines the momentum of the spark, must be strengthened in the state of greatest power and greatest number of revolutions.
  • Next, listen carefully. A click should be heard when turning the breaker system.
  • After all the steps done, you must tighten the tumbler nut.

The strobe method works as follows:

  • Warm up the engine first.
  • After that, attach the stroboscope to the machine.
  • Connect the sensor that reacts to the sound to the high-voltage wire of the cylinder.
  • Dismantle vacuum hose and plug it off.
  • The strobe light will emit a light that should be pointed at the pulley.
  • Start the machine’s engine again, leave it running at idle.
  • Turn the rocker switch.
  • Fasten as soon as the pulley mark is pointing to the mark marked on the cover of the motoblock.
  • Screw in the breaker nut.

Above describes how to check the ignition coil. When installing the system, it is advisable to use the manual, especially for owners who are encountering it for the first time.

Adjusting the coil is not a difficult task.

The most common motor failures

The engine of a Cascade power block can serve for many years without fail, if you stick to all the operating conditions. All the same, sooner or later the technique is inherent in the LADA and most often the engine can fail. There are 2 categories of failures, in case the equipment does not start:

The reasons for engine failures can be different: from an excessive amount of fuel in the tank to the fact that the fuel does not come to the carburetor. Perhaps, in the presence of an electric starter, the battery may be discharged. Also a popular cause of malfunctioning of the engine may be incompatibility of the marks set on the camshaft and crankshaft. In this case, you need to put the marks in a position where they will coincide. Usually on the 13th tooth from TDC there is a line, which should be aligned with the line on the camshaft.

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