Today, more and more people use walk-behind tractors on their plots. This is not surprising, because such equipment can do absolutely everything: plow the ground, plant and harvest potatoes, transport cargo, and even remove snow. However, like any other machines, walk-behind tractors sometimes break down and require repair.

In this article we will look at the ignition system of a walk-behind tractor, the types of its breakdowns, how to eliminate them, as well as the process of adjusting the ignition. And if the cause of the malfunction lies precisely here, it will not be difficult for you to eliminate it.

Setting up the walk-behind tractor ignition system

The ignition system is a very important design that ensures the formation of a spark in the chamber internal combustion for ignition air- fuel mixture. In order not to encounter breakdowns and not to call a repairman, you need to know how to correctly set the ignition on the walk-behind tractor. This can be done in different ways.

1. Thanks to the spark. Do the following:
   • Turn the crankshaft so that the pulley mark and the mark located at the base of the timing mechanism coincide. In this case, the interruption-distribution slider should point to the high-voltage wire of one of the cylinders;
   • loosen the nut that positions the body of the mechanism that determines the moment of creation of high-voltage pulses;
   • from the system cover, which determines the moment of creation of high-voltage pulses, you need to remove high voltage wire, located in the center, and place its contact at a distance of 5 millimeters from the “ground” of the walk-behind tractor;
   • now turn on the ignition;
   • the body of the mechanism that determines the moment of creation of the above-mentioned impulses must be turned clockwise to the 200 mark;
   • now slowly turn your body in the opposite direction;
   • the position of the mechanism should not change, but you will see a spark between the contact located in the center and the “ground”;
   • tighten the breaker nut.
2. Using your hearing:
   • start the engine;
   • Unscrew the nut that holds the distributor base a little;
   • the interrupter housing must be slowly rotated on both sides;
   • the state of the mechanism, which determines the appearance of high-voltage pulses, must be fixed in the position when the motor power is the highest and the speed is the highest. Listen carefully;
   • turn the breaker body clockwise;
   • now firmly fasten the distributor fastening element;
3. Using a strobe:
   • heat the walk-behind tractor engine to a state optimal for operation;
   • connect the power supply of the strobe to the network of your unit;
   • the sensor, which is designed to trigger the sound, must be placed on the high-voltage electrical wire of one of the cylinders;
   • remove the vacuum correction hose and plug it;
   • the light from the strobe should be directed towards the pulley;
   • start the engine. It should run at idle speed;
   • rotate the distributor body;
   • create the fastening when the pulley mark is directed to the mark on the cover of the device;
   • tighten the fixing nut.

Breakdowns and ways to fix them

If your walk-behind tractor stops starting, perhaps the reason is in the ignition system. There may be several reasons:

• malfunction in the ignition coil;
• in a spark plug for a walk-behind tractor;
• in the tip of the candle;
• in the wire.

To check the spark plug, you need to unscrew it and examine the central and side electrodes. If carbon deposits are found on it, it can be easily removed using a gas burner.

How to check the coil (magneto)? Exactly the same as a candle. You need to put a tip on the spark plug, and bring the lower part to the magneto body. If you rotate the flywheel and there is no spark, then the failure is in the coil.

Many owners of walk-behind tractors are often interested in the question, which spark plug is better? As practice and knowledge of specialists show, the one with the shorter heat removal path is better. Such a part will not overheat and will last much longer.

As you can see, the ignition system is quite easy to repair. It is only important to start repairs on time. Also, do not forget to periodically clean the spark plug, which will significantly extend its service life.

The heart of any equipment is the motor and the Cascade walk-behind tractor is no exception. The efficiency of its operation, its traction force, endurance and other qualities will depend on the engine. But how to choose an engine for Cascade? What to do to avoid breakdowns and extend its service life? We will now try to answer these and many other questions.

Which engine is better to put on the Cascade walk-behind tractor?

It is necessary to take into account the fact that engines domestic production, which were produced for this walk-behind tractor, are no longer available. So you will need to choose among the imported assortment. But it’s almost impossible to find a part that meets all the parameters. Most often, you still need to purchase an additional set of fasteners (belt, stabilizers, pulley, platform), since many engine models may differ in different seats or shaft diameter.

The following engines are most often installed on the Cascade:

1. DM 68 is a good quality engine that is recommended as one of best options for installation on such equipment. Its main advantage is a reinforced transmission and high-quality assembly. Technical characteristics:
   1. power – 6 hp;
   2. fuel tank: 3.3 l;
   3. processing depth – 26 cm;
   4. processing width – 45/60/95 cm;
   5. number of gears: 2 forward, 2 reverse.
2. B&S I/C – modern model engine, which is very popular among walk-behind tractor owners. This is due to its main features:
   1. reinforced transmission;
   2. increased power of 6.5 liters. With.;
   3. fuel tank with a volume of 3.6 liters;
   4. minimum noise level;
   5. efficient operation even at low temperatures.
3. Vanguard OHV is powerful engine, which will allow you to cope with the tasks quickly and efficiently. Such high level work is achieved thanks to its power of 7.5 Horse power and a fuel tank volume of 4.5 liters.

When purchasing an engine, pay attention to its build quality. It must answer everyone modern requirements, this will ensure the unit a long service life and operational efficiency.

Motor device

• cylinder-piston group with a crank mechanism;
• gas distribution mechanism;
• trigger mechanism;
• ignition system;
• cooling system;
• muffler;
• fuel supply system;
• easy starting mechanism;
• forced lubrication system.

Engine DM-1D: 1 - plug; 2 - cylinder block cover; 3 - plug-dipstick; 4 - pin; 5 - settling filter; 6 - connecting hose; 7 - fuel tap; 8 - nut; 9 - bolt; 10 - tank mounting clamp; 11 - bracket; 12 - fuel tank; 13 - plug; 14 - hole, 15 - high-voltage wire; 16 - candle square; 17 - candle; 18 - threaded bushing; 19 - valve; 20 - saddle; 21 - muffler; 22 - air filter; 23 - pipe; 24 - valve spring; 25 - valve plug; 26 - gasket; 27 - carburetor; 28 - screw; 29 - air lever; 30 - bolt; 31 - carburetor board.

The most common engine problems

The engine of the Cascade walk-behind tractor can serve uninterruptedly for many years if you adhere to all operating conditions. Nevertheless, sooner or later, technology tends to go out of tune and most often the engine may fail. There are 2 categories of breakdowns if the equipment does not start:

1. The unit will not start at all.
2. The equipment works intermittently.

The reasons for engine breakdowns can be different: from excess fuel in the tank to the fact that fuel does not enter the carburetor. It is possible that if there is an electric starter, the battery may be discharged. Another common cause of engine failure may be incompatibility of the marks on the camshaft and crankshaft. In this case, you need to put the marks in a position where they coincide. Usually there is a line at the 13th tooth from TDC that needs to be aligned with the line on the camshaft.

36648 07/28/2019 5 min.

Walk-behind tractors as a means of plowing land known to many since Soviet times. This tool small mechanization copes with this task perfectly, significantly simplifying a person’s work.

Considering that this unit can be equipped with additional attachments, then virtually all work on the site is within his power.

However, in order for the walk-behind tractor to work in optimal mode, without failures, it needs ongoing care, which consists in timely maintenance.

In addition, adjustment plays an important role various nodes, which are responsible for performance characteristics. In particular, we are talking about adjusting the carburetor valves, the correctness of which will determine the stability of the engine.

About the design of walk-behind tractors and valves

Walk-behind tractors , are quite complex technical device , consisting of several main working units: engine, transmission, chassis and controls.

Understanding the design of a walk-behind tractor is very important, because the correctness of repair and adjustment work depends on it.

Let's look at each node in more detail:

• Engine. Depending on the configuration, 2-stroke and 4-stroke engines can be used. At the moment, greatest distribution We got 4-stroke ones because they have higher performance indicators.
• In addition, engines are divided into diesel and gasoline. The former are most suitable for large-sized units, and the latter – for small and medium-sized walk-behind tractors.

For more information about the operation of the walk-behind tractor engine, see the video below:

• Transmission. The torque that is transmitted from the engine to the wheels is carried out through the transmission. It includes a gearbox, gearbox, clutch system and differential (for some models).
• Depending on the type of gearbox and clutch, not only the cost of the walk-behind tractor is determined, but also the operating principle of these components.
• Chassis. Most walk-behind tractors have a pair of wheels various types– pneumatic or metal, equipped with lugs. Besides, chassis includes the frame itself, on which all other elements of the walk-behind tractor are located - engine, gearbox, etc.
• Control system. All control of the walk-behind tractor is located at a distance arm's length operator, i.e. on the handle and in its immediate vicinity. This includes the clutch lever, gear shift and motion change buttons, emergency stop engine, etc.

Carburetor walk-behind tractor

Concerning carburetor, it is part of the engine power supply system. Acts as a kind of mixer that mixes liquid fuel with air to obtain a fuel mixture, which then enters the engine cylinders. Structurally, it looks like this:

• float chamber;
• diffuser;
• spray;
• throttle and air dampers;
• mixing chamber;
• jet, etc.

This description of standard carburetor, but different models walk-behind tractor, such as, different carburetors can be used, and accordingly, the adjustment will be different.

Required Tools

To adjust the carburetor valves, you will need a minimum list of handy tools:

• razor blade or feeler gauge;
• minus screwdriver;
• spanner wrench

With these simple means Most carburetors can be adjusted.

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It is important to understand that by adjusting the valves we mean setting the optimal clearance, which is directly stated in the operating instructions for each specific model.

Step-by-step instructions for different models

Lifan 6.5

Adjusting valves on a walk-behind tractor is to set the correct clearance under the valves. The sequence of actions will be as follows:

• Remove the casing to get to the flywheel.
• Filming valve cover. Below it there are two valves - inlet and outlet.
• To check the intake valve clearance, you will need a 0.15 mm feeler gauge, and for the exhaust valve, a 0.2 mm feeler gauge. When adjusted correctly, the dipstick should pass under the valve quite freely.
• To adjust, loosen the fastening nuts using a wrench. We insert the dipstick between the valve and the piston so that it does not slip, but is held tightly enough in this position. We tighten the nut.
• Replace the valve cover and flywheel housing.

Valve of Lifan 6.5 walk-behind tractor

Adjustment of devices Neva mb 2, Zirka 105

The process of adjusting the valves on the Neva MB 2 walk-behind tractor and a similar Zirka 105 walk-behind tractor:

• Let the engine run and then cool down a little.
• We remove the casing.
• We remove the valve cover and get to the flywheels that are under it.
• Unscrew the locknut.
• Blade, which we insert into the gap should pass very freely between piston and valve.
• Screw the entire system back.

How to properly adjust the valve of a Zip walk-behind tractor

What is the procedure for adjusting the valves on the popular zip walk-behind tractor:

• Open the flywheel.
• Unscrew the valve cover clockwise.
• We check the gap with a feeler gauge exactly as described above.
• Use a wrench to turn the nuts and loosen them a little.
• We close the system and conduct testing.

How to set up on an Agro walk-behind tractor

The valves on the Agro walk-behind tractor are adjusted as follows:

• Warming up the engine, after which we give it some time to cool down.
• Remove the oil bath of the air filter.
• Next, you need to unscrew the flywheel housing, which is secured with 6 bolts.
• There are marks on the flywheel– 0 (top dead center), 5, 10 and 20 (fuel injection). We compare the dead center of the flywheel with a mark located on the cylinder so that they are opposite each other.
• Next, remove the valve cover.
• Below it are two valves. Loosen the locknut, then insert a razor blade under the valve. The blade must pass freely between the piston and the valve.
• Having achieved this, tighten the nut back. Then we return the valve cover and flywheel housing to their place.

It is worth noting that identical adjustment steps are carried out to adjust the valves on the Patriot walk-behind tractor. The Agros walk-behind tractor and its valve adjustment also correspond to the MB 1 walk-behind tractor.

So, if necessary, you can use an identical scheme.

Cascade

Adjusting valves on the Cascade walk-behind tractor :

• Remove the casing from the flywheel.
• Remove the valve cover.
• Turn the flywheel until inlet valve will not be pressed. Respectively, Exhaust valve will be pressed out.
• Next you need to achieve the correct clearance for each of the valves. According to the instructions, for the inlet this parameter is 0.15 mm, and for the exhaust - 0.20 mm.
• Using a feeler gauge, check the existing gap between the valve and the piston. If the dipstick slips a lot, or it does not pass between them at all, then we will need adjustment. If there is no probe, then you can use a razor blade, the thickness of which is 0.1 mm.
• To adjust, loosen the fastening nut, and then insert the feeler gauge into the space under the valve. Its optimal position will be a fairly tight movement between the piston and the valve, without slipping.
• If everything worked out, tighten the nuts back, then put the valve cover and casing in place.

It is also worth approaching valve adjustment based on the instructions described above.

The operating scheme is arranged in an identical way, so you can use one algorithm of actions, exactly the same as for adjusting the valves on the popular Centaur walk-behind tractor.

Conclusion

Walk-behind tractor can perform a very wide range of work, but this requires some effort on the part of the owner of this unit. We are talking not only about replacing failed parts and components, but also about timely adjustment of some components of the device.

In particular, how correctly and on time the valves are adjusted will depend correct work walk-behind tractor engine.

And it doesn’t matter whether we are talking about a Honda walk-behind tractor, or whether we are considering a Vityaz 8hp walk-behind tractor and its correct adjustment, we are talking about adjusting the valves on diesel walk-behind tractor Or do you need to adjust the valves on the Forte petrol walk-behind tractor...

In any case, you should be careful this action and make adjustments as accurately as possible.

It is advisable to do this after each season, but there are cases when such adjustment is required at least twice during a given period of work. The main indications for this are atypical noise in the carburetor area, tapping - in general, uncharacteristic sounds during operation of the walk-behind tractor.

If this is discovered, and if the valves do not maintain the dz adjustment in the walk-behind tractor, then you need to immediately inspect and decide on actions, especially since this procedure Quite simple and doable at home.

A useful device that you can assemble with your own hands.