Comparison Daewoo DAT 4555 vs Daewoo DAT 2500E

— Petrol. Internal combustion engine on gasoline. Such engines have good power, are easy to operate and are not limited by the length of the power cord (like electric ones). Their disadvantages are a significant noise level, exhaust emissions and the need to purchase fuels and lubricants, as a result - a fairly high cost of operation. However, most walk-behind tractors and cultivators have gasoline engines.

— Diesel. An internal combustion engine similar in design to a gasoline engine, but with a number of differences in the operating principle and, as a result, in operation. Thus, it is fueled with diesel fuel, which is somewhat cheaper than gasoline. Diesel engines have good torque at low speeds, due to which they are well suited for heavy work (plowing, transporting goods). On the other hand, they are not without drawbacks - high cost of repair and high requirements for fuel purity. As a result, diesel walk-behind tractors and cultivators are less common.

— Corded electric. Electric motors powered by an electrical network, most often a regular household 230 V. The advantages of all electric motors over gasoline/diesel ones are, in particular, low cost (including in operation), smaller dimensions and weight, ease of maintenance (almost none required), low noise level and absence of exhaust gases. On the other hand, their power is relatively low — even for...models powered by the network it does not exceed 3 kW. Therefore, electric units are mainly made for small volumes of work, which are more like cultivators than full-fledged walk-behind tractors. It is also worth noting here that when powered by the network, the mobility of the unit is limited by the length of the power cord. On the other hand, models with such power are generally more powerful than battery-powered ones, with similar power — lighter and cheaper, and the operating time is practically unlimited.

— Battery. Electric motors powered by batteries. The main features of electric motors are generally described above, and battery power makes the unit as autonomous as possible, independent of sockets and the length of the power cord. At the same time, models with such power are even less powerful than devices connected to the network - most of them do not even reach 1.5 kW. In addition, the battery affects the weight and cost of the unit, and the operating time is limited; charging the battery takes a lot of time and still requires a power source. So it makes sense to use cultivators of this type only when the volume of work is small and there are no sockets nearby; such situations occur extremely rarely, so this option has not become widespread.

The type of gearbox provided in the design of the two-wheel tractor.

The gearbox is a mechanism for transmitting rotation from the motor shaft to the working shaft; the speed of rotation is reduced, and the tractive effort, respectively, increases. In modern units, worm, chain, gear and gear-chain gearboxes can be used; here are their main features:

— Worm. Gearboxes based on a worm gear are mainly used in light two-wheel tractors with passive cutters (motor cultivators). With simplicity and low cost, such a gearbox provides a high gear ratio, which makes it possible to achieve good traction at a relatively low engine power. Other advantages of worm gears include compactness, minimum noise level, smooth running and self-braking ability. On the other hand, such gearboxes do not tolerate high loads, which determined the scope of their application.

— Chain. Gearboxes based on a chain drive — two gears connected by a chain (similar to the mechanism used in bicycles). Such gearboxes are somewhat more expensive than worm gears, but they are more reliable and able to work with higher loads. Another advantage lies in the small width of the body, which is especially important for motor cultivators — the gearbox does not limit the depth of processing, since it can be buried in the soil simultaneously with the cutters.

...— Geared. The most advanced type of modern gearboxes. Such mechanisms are highly reliable and durable, they normally endure long-term work at high loads. The downside of these advantages is the high price. Gear reducers are used mainly on professional equipment, for which "endurance" is critical.

— Gear-chain. A compromise option, which, when installed on a motor cultivator, increases its performance (compared to chain and worm), and when installed on a motor block, slightly reduces the cost of the latter.

The type of internal combustion engine (petrol or diesel, see "Motor type") of two-wheel tractor/cultivator.

— 2-stroke. The advantages of two-stroke engines are their simple design (and consequently, low cost) and high power. On the other hand, they are characterized by high noise levels and fuel consumption. In addition, there are difficulties with the fuel itself: such engines are filled with a gasoline-oil mixture, which requires precise proportions, otherwise the engine will either wear out heavily (with a lack of oil) or smoke (with its excess). In walk-behind tractors, two-stroke engines are only gasoline, diesel engines of this type are not used.

— 4-stroke. Such engines are more complex in design, more expensive and less powerful (with the same volume) than two-stroke ones. On the other hand, they make less noise, have lower fuel consumption, and the fuel itself is filled separately from the oil, and when filling, you do not need to bother with preparing the mixture. Also note that diesel engines in walk-behind tractors are made only 4-stroke.

Model of the engine installed in the two-wheel tractor / cultivator. The main performance data of the engine is usually indicated in the general data for the unit. However, knowing the exact name of the motor, you can find more detailed information on it — starting from specific data like torque or revolutions and ending with reviews and reviews. Also, data on the engine model can be useful when searching for spare parts or consumables.

The working volume of the gasoline or diesel engine of the cultivator / two-wheel tractor. For an internal combustion engine of the same type (see "Type of internal combustion engine"), power and fuel consumption usually directly depend on the volume. Also, the classification of a two-wheel tractor as a vehicle according to the traffic rules of a particular country may depend on the engine volume; you should pay attention to this if you plan to use the unit as a tractor and drive on roads.

Horsepower of two-wheel tractor/cultivator motor. The basic unit of power nowadays is watt, however for petrol and diesel engines (see "Motor type") the more traditional designation in horsepower is often used. 1 hp is approximately equal to 735 watts.

More powerful motor allows achieving higher productivity, width and depth of processing. On the other hand, high power significantly affects the price, weight and dimensions of the unit, as well as the consumption of electricity/fuel. In light of this, the engine characteristics are selected by the manufacturer taking into account what "weight category" the walk-behind tractor belongs to. The most limited modern units have a power of up to 2 hp, in the heaviest and most advanced this figure can exceed 13 hp ; 4 - 7 hp can be called an average indicator, and 2 - 4 hp and 7 - 13 hp are below and above average, respectively.

Detailed recommendations on the optimal power for a given situation can be found in specialized sources.

The power of the two-wheel tractor/cultivator engine in watts. This designation is usually used for electric engines, but can also be used for petrol/diesel engines, along with horsepower (for more information, see the "Motor power" section above).

More powerful motor allows achieving higher productivity, width and depth of processing. On the other hand, high power significantly affects the price, weight and dimensions of the unit, as well as the consumption of electricity / fuel. In light of this, the engine power is selected by the manufacturer taking into account what "weight category" the walk-behind tractor belongs to, what characteristics it should show. So, the lightest models have a power of up to 1.5 kW, this is the device that is best suited for a small area of 6 - 8 acres. Walk-behind tractors up to 3 kW can cope with 10 - 15 acres, a power of 3.5 - 5 kW is suitable for a plot of 50 acres to a couple of hectares. Units for 5 - 10 kW are already classified as professional level, they can "tame" spaces of 7 - 10 hectares; and the heaviest and most powerful modern walk-behind tractors have a power of more than 10 kW.

The method of starting a petrol or diesel engine (see "Motor type") provided in the unit.

— Manual. Starting by human muscle power: the operator pulls a special cable or turns a handle, which causes the shaft to rotate and the engine to receive the initial impulse necessary for operation. Manual starting systems are inexpensive, lightweight and compact, and do not depend on batteries that can run out at the most inopportune moment. On the other hand, the starting process itself may require significant effort, especially in a heavy, powerful engine. Therefore, this option is used mainly in relatively low-power models.

— Electric . Starting with starter — small electric motor powered by a battery. Such systems are much more convenient than manual ones — the operator is actually required to press a button or turn a key; they are suitable even for the most powerful motors. On the other hand, a starter with a battery significantly increases the weight, dimensions and cost of the entire unit, and if left idle for a long time, the battery may run down, and the system will become useless (however, a spare manual "starter" may be provided for this case). Therefore, this starting method is used exclusively in heavy equipment, for which the ability to do without manual starting is more important than the described disadvantages.

The volume of the fuel tank of the cultivator / two-wheel tractor; knowing this parameter and fuel consumption (see above), it is possible to determine the maximum operating time of the unit on a single refill. If you plan to use the device in large areas or to work for a long time, it makes sense to look for a model with a large tank — it will not have to be filled often. On the other hand, for short-term work in small areas, a large tank is not required — in this case, it only increases the weight and dimensions of the unit.