Selection and installation of the engine on the "Ural" walk-behind tractor

All gardeners and gardeners prepare their plots with the beginning of seasonal work. For plowing the land, many use walk-behind tractors. But not everyone can buy the latest models and continue to use the legacy of the Soviet Union. One such unit will be discussed today.

Motoblocks "Ural-UMP-5V" first began to be sold in the country just before its global redistribution at the dawn of the 90s of the last century. Since many people needed motoblocks as a convenient and cheap technical means, therefore it became very popular in the USSR. In just a few years, its sales reached 150 thousand units. This popularity of the walk-behind tractor was facilitated by the optimal combination of its characteristics.

The walk-behind tractor has a wide adjustable ground clearance, which allows the device to be operated on different types of sites. But it should be noted that the basic model of the "Ural" is not particularly versatile. It can only transport goods and cultivate the soil. Mowing grass, removing garbage or snow using attachments will not work with this technique - such opportunities are not provided. But if you independently redo the structure by adding the necessary fastening nodes, then you can expand its functionality.

The model is implemented according to the scheme of power transfer to the wheels by means of a differential. Some modifications use foreign high-power engines, but domestic versions are the most popular due to the availability of spare parts, proper documentation and durability of operation.

Here are some data on the walk-behind tractor.

• dimensions of the walk-behind tractor: 1560/790/1050 mm;
• ground clearance 270 mm;
• cylinder volume 0.475 l;
• weight - 125 kg;
• with a fuel tank volume of 6 liters, fuel consumption is less than two liters of gasoline;
• four-stroke engine with right-hand rotation, single-cylinder, uses gasoline with any octane number, reacts well to gas;
• air-cooled;
• the battery shows high charge rates.

Advantages of the Ural walk-behind tractor:

• when the unit weighs more than a centner, it is not necessary to additionally press on the handles with its own weight, which makes it easier to cultivate the land;
• there are numerous opportunities for self-improvement and design upgrades;
• high resource indicators of the engine;
• the air filter does not require replacing the gaskets.

At the same time, the following disadvantages were also noted:

• Frequent leakage of lubricant at the joints of the engine / gearbox;
• you have to check the oil level frequently;
• the gas distribution mechanism leads to an increase in the consumption of gasoline and engine oils due to design features;
• not recommended for long journeys with a load (low speed).

Engines UMZ-5B and its variant UMZ-5DU-B have the following characteristics:

• four-stroke, power up to 5.4 liters. with. (more than 3.5 kW);
• equipped with a two-stage gearbox with a gear ratio of 1 to 6 or 1 to 2.91;
• one cylinder;
• forced cooling.

The UMZ-5DU-B model differs in that its gearbox is single-stage and its gear ratio is 1 to 6, and a ratchet is not installed on the gearbox shaft.

As an alternative to Ural engines, if it becomes necessary to replace it, imported products from the Chinese manufacturer Lifan are often chosen.

Lifan was founded in the early 90s of the twentieth century and today is one of the most famous large companies in our automotive market. In addition to engines, Lifan also produces other motor vehicles with an optimal price-quality ratio. The products are certified, and each product must be accompanied by a technical passport and operating instructions.

Lifan presents different types of engines on the Russian market. One of the most important characteristics when choosing an engine is the mounting dimensions, since they do not always correspond to Russian standards.

Another important characteristic is engine power, since in most cases Lifan engines have 6.5 liters. with. against 5 liters. with. at the "Ural".

Disassembly itself is not particularly difficult and is performed in a couple of stages even by a specialist with little or no experience.

1. The old engine is removed from the mounting connectors using standard open-end wrenches.
2. First, disconnect the fuel and oil lines, if any.
3. Next, remove the centrifugal regulator.
4. Sometimes, at the stage of installing a new engine, it is necessary to use gaskets, but with the correct selection of sizes, this is not necessary. The easiest way is to install an adapter plate with holes for fastening.

Lifan offers several lines of gasoline engines: 168F, 168F-2, 177F and 2V77F.

Ruler 168F:

• four-stroke;
• power - up to 5.4 liters. with. (more than 3.5 kW);
• 1 cylinder;
• cooling - forced;
• the crankshaft is located at an angle of 25 degrees;
• cylinder - 163 cm3;
• fuel tank - 3.6 liters;
• cylinder with a diameter of 68 mm;
• shaft with a diameter of 19 mm;
• started manually;
• dimensions 312х365х334 mm;
• weight - 15 kg.

The 168F-2 engine is of interest to buyers in that it differs from the previous version in its increased resource and higher parameters - it is more powerful (6.5 hp), has a larger cylinder (196 cc).

Engines in 9 liters. with. represented by Lifan 177F models:

• four-stroke;
• power - up to 9 liters. with. (more than 5.6 kW);
• one cylinder;
• forced air cooling;
• the crankshaft is horizontal;
• cylinder - 270 cm3;
• fuel tank - 10 liters;
• started manually;
• dimensions 378x428x408 mm;
• weight - 27 kg.

The Lifan 2V77F model has even higher characteristics and more power, according to its characteristics - the best heavy engine in its class:

• four-stroke;
• power up to 17 liters. with. (more than 12.4 kW);
• two pistons;
• mechanical speed controller;
• cooling - forced, air;
• the crankshaft is horizontal;
• cylinder - 615 cm3;
• fuel - 27.5 liters;
• launch - manually;
• dimensions 455x396x447 mm;
• weight - 42 kg.

According to their traction characteristics, walk-behind tractors are divided into classes.

1. The light class includes devices with engines of less than 5 liters. with. - they are used to treat areas of less than 0.02 hectares.
2. Medium motoblocks with engines less than 9 liters. with. - used on plots up to one hectare.
3. Heavy, with a capacity of up to 18 liters. with. - cultivate the soil on plots of up to four hectares.

How to install the Lifan 168f-2 engine on the Ural walk-behind tractor, see the video.