The history of domestic passenger transport is unthinkable without an abbreviation liazazFor decades, it has been synonymous with reliability and recognizable design. Likinsky bus plant has gone from the production of trolleybuses to the creation of modern environmentally friendly cars, which have become the standard for many cities in Russia. Studying model-lineThe evolution of engineering thought can be traced from hooded monsters with manual transmission to gas-engine giants with automatic and air conditioning.
For a modern buyer or restorer, understanding the differences between generations is critical, as the spare parts And the knots are very different. Early models required constant manual adjustment of the brakes and frequent replacement of friction linings, while newer versions are equipped with ABS and EBS systems. In this article, we will discuss in detail how the concept of the bus has changed, and what to pay attention to when choosing a vehicle.
Particular attention should be paid to the transitional periods in the history of the plant, when not only the appearance, but also the power unit base changed. The key point was the transition from diesel engines to gas Cummins and modern YaMZ-536.This significantly reduces the noise and vibration in the cabin. This change made the driver’s job more comfortable and the trip more enjoyable for passengers.
The era of classics: LiAZ-677 and its modifications
The most recognizable car of the Soviet period was Liaz-677It was produced massively from the mid-60s to the early 90s. This bus with a characteristic “snubnosed” design and panoramic windshield became a symbol of the era. The design was as unified as possible, which allowed it to be repaired in any conditions using a minimum set of tools.
The ZIL-130 engine, mounted under the floor at the rear, provided acceptable dynamics for the city, although it was distinguished by high fuel consumption. Manual transmission It required the driver to be highly qualified, especially when moving on the rise with a full landing. It was on the basis of the 677th that the first articulated models and even trolleybuses appeared, which expanded the possibilities of public transport.
- 🚌 LiAZ-677M - An upgraded version with an improved heating system and a modified cabin layout.
- 🚍 LiAZ-677 - gas modification, which appeared in response to the fuel crisis, running on liquefied gas.
- 🚎 LiAZ-677 - trolleybus version, which became the basis for many parks of electric transport of the USSR.
⚠️ Attention: When buying a rare LiAZ-677 for restoration, carefully check the condition of the frame and spars, as metal corrosion is the main problem of these ageing machines.
Transition period: LiAZ-5256 and design change
In the late 80s, a new model came to replace angular forms. LiAZ-5256The design of which was developed with the involvement of specialists from the GDR. This bus received a fully-carrying body layout, which was a revolutionary step for Soviet engineering. Smooth contours of the body not only improved aerodynamics, but also allowed to increase the usable area of the cabin.
Technically, the machine has also undergone changes: there was a pneumatic suspension, which significantly improved the smoothness of the ride. However, early copies suffered from poor quality components and problems with the electric. The KAMAZ and later YAMZ engines were installed vertically in the rear overhang, which facilitated access to them, but created a high noise level in the rear of the cabin.
The 5256 became a platform for many modifications, including tourist versions with soft seats and buses for long-distance transportation. It was during this period that the plant began to introduce more foreign components, such as the Voith and ZF transmissions, which increased the reliability of the transmission.
- 🛠️ LiAZ-5256.20 - version with a Cummins diesel engine and an automatic transmission.
- 🌍 LiAZ-5256.26 - Modification for long-distance routes with an increased luggage compartment.
- ♿ LiAZ-5256.57 One of the first versions adapted for the transportation of low-mobility groups of the population.
When operating LiAZ-5256, pay attention to the condition of the suspension air elements: their life is about 300 000 km, after which loss of tightness is possible.
Realities of the 90s and 2000s: LiAZ-5280 and the Crisis
The period of the 90s was a difficult test for the plant, but production did not stop. Model LiAZ-5280The bus, also known as Ochakovo, was an attempt to modernize the classic high-floor bus. The car received a more modern interior, a new dashboard and an improved ventilation system, although it remained structurally close to its predecessors.
At this time, the plant was actively looking for new niches, producing medium-capacity buses and even trying to compete with shuttle taxis. There are versions with a reduced base and a modified layout of the doors to accelerate the landing and disembarkation. Resource of aggregates During this period, it often depended on the quality of the assembly of a particular instance, as the quality control fluctuated due to economic difficulties.
Despite the difficulties, the engineers managed to maintain the main production chains, which allowed the launch of a modernization program in the early 2000s. Active work began on the creation of low-floor buses that were to meet the new European standards of comfort.
- 🏙️ LiAZ-5280 - a large city bus with a high roof and improved visibility.
- 🚐 LiAZ-4292 - a mid-class bus, created to replace PAZs on busy routes.
- 🔧 LiAZ-5251 The low-floor bus, which became the forerunner of modern models of the 5292 family.
⚠️ Attention: Buses of the late 90s – early 2000s often have problems with wiring due to the use of poor-quality insulation materials that are prone to cracking.
Modern era: family LiAZ-5292
The real renaissance of the brand began with the launch of a series of models LiAZ-5292. This low-floor bus has become the new standard for Moscow and other major cities. The lack of steps at the first door, the presence of a folding ramp and a storage device for wheelchairs made transport accessible to all segments of the population.
The body design is made of stainless steel, which guarantees a high resource and protection against corrosion even in harsh winter operation with reagents. The engine is located vertically in the rear overhang, and the cooling system is placed on the roof, which reduced the temperature in the engine compartment and increased efficiency. cooling-system.
The salon of modern LiAZ is equipped with a video surveillance system, GPS tracking, USB connectors for charging gadgets and air conditioning in the roof. The driver’s seat is ergonomically and completely separated from the passengers, which meets the safety requirements. Automatic gearboxes and lift start assist systems make it easy to control.
| Parameter | LiAZ-5292.65 (Diesel) | LiAZ-5292.67 (Gas) | LiAZ-5292.60 (Euro-5) |
|---|---|---|---|
| Engine. | YAMZ-5362 | Cummins ISB6.7E5 | YaMZ-53623 |
| Power | 285 hp | 295 hp | 285 hp |
| Ecology. | Euro-5 | Euro-5 | Euro-5 |
| Capacity | 105 people. | up to 100 people. | 105 people. |
☑️ Check before buying a used LiAZ
Gas engine engineering and ecology
Special attention should be paid to the direction related to the transfer of equipment to natural gas. Models with index .67 and their modifications are equipped with cylinders located on the roof, which practically does not reduce the useful area of the cabin. The use of methane allows you to significantly save on fuel and reduce harmful emissions into the atmosphere.
The Cummins gas engines installed on these machines are highly reliable and have a lower noise level compared to diesel counterparts. However, the operation of gas cylinder equipment requires strict safety regulations and regular leakproofness checks. gas-line.
City parks are increasingly choosing gas-engine technology because of its environmental friendliness and cost-effectiveness. The power reserve at one gas station allows you to service routes for a full working day without the need for refueling.
- ⛽ LiAZ-6213 - articulated gas bus for super-loaded highways.
- 🌿 LiAZ-4292.60 - a medium-class bus on methane for suburban routes.
- 🔋 LiAZ-6228 - electric bus, which is a further development of the idea of environmentally friendly transport.
Why is gas cheaper than diesel?
The cost of 1 cubic meter of natural gas is significantly lower than the price of diesel fuel in terms of energy equivalent. In addition, the gas burns cleaner, which increases the resource of engine oil and spark plugs.
Maintenance and durability
Modern LiAZ buses require a qualified approach to service. Oil replacement intervals in the engines of YAMZ and Cummins can reach 30-40 thousand kilometers, but only with the use of recommended lubricants. Ignoring the maintenance regulations can lead to the rapid failure of expensive components, such as a turbocharger or fuel equipment.
The pneumatic system, which is the heart of many bus components (brake, suspension, door), is sensitive to compressed air quality. Regular replacement of air filters and draining of condensate from receivers is a mandatory procedure to prevent corrosion and freezing in winter. Brake system ABS requires periodic computer diagnostics.
The stainless steel body requires almost no anti-corrosion treatment, but it needs regular washing, especially in winter, when salt is used on the roads. Timely elimination of minor damage to the paint coating will prevent the appearance of foci of corrosion on welds.
⚠️ Attention: Do not use aggressive chemicals to wash aluminum radiators air conditioner and intercooler, as this can lead to depressurization and expensive repairs.
Compliance with maintenance regulations and the use of original spare parts is a key factor in the durability of a modern LiAZ bus.
Frequently Asked Questions (FAQ)
What is the resource of the engine on modern LiAZ before major repairs?
Subject to operating conditions and timely maintenance, the life of the diesel engines YAMZ and Cummins ranges from 800,000 to 1,000,000 kilometers of mileage before the first overhaul.
Can I install air conditioning on older models of LiAZ?
Theoretically, this is possible, but it requires significant alterations of the electrical network and the installation of an additional generator, since the standard system of older models is not designed for such a load.
What is the main difference between LiAZ-5292 and LiAZ-5256?
The main difference is the low floor throughout the cabin of the 5292, the presence of a kneeling system (bus squat) and a fully automated transmission, while the 5256 is a high-floor bus with mechanics or a semi-automatic.
Where are the LiAZ buses currently manufactured?
The main production is concentrated in the city of Likino-Dubevo, Moscow region, where there are powerful production lines, including painting and body assembly shops.