The heavy machinery is one of the most important resources for the successful implementation of projects in the construction and mining industries. Today a contractor take on a completely diverse tasks, which require the use of equipment of different types and sizes. Typically, companies invest a significant portion of the project funds in a highly efficient special equipment, as the success depends on the performance of equipment in continuous operation.
A bulldozer is usually the starting level and actually acts as a “feeder” for all equipment operating on site. Therefore, any delay in the work of the bulldozer may have a negative impact on the efficiency of other machinery and equipment and thus the entire project.
Modern bulldozers have changed since the time of the first machines in the 1900s. Now they come with a whole range of tools for automatic management and monitoring, hydraulic systems and ergonomic joysticks, their productivity has increased to such a level that it would be hard to imagine a few decades ago.
The advantages of bulldozers
Bulldozers have become a versatile multi-purpose tool for private and municipal companies because of their standard working equipment: blade and rippers. Simple, but nevertheless very functional, they are used in a wide range of industries: agriculture, road construction, urban development, landscaping, planning. In the production process, these machines replaced countless man-hours that would be spent on manual work.It can provide mechanized perform such operations as filling, snow removal, clearing of bushes, demolition, digging, loading, raking, leveling, digging ditches, creating firebreaks, removing stumps, planning.
General technical characteristics of the bulldozers:
- Engine output: from 92 to 850 HP
- Maximum speed: from 10 to 16 km/h
- Operating weight: from 8,000 to 104,000 kg
- Cultivator: 1 to 3 teeth with standard cultivation depth 13 inches
- The width of the blade: 2.6 m to 4.15 m
Leading manufacturers of bulldozers is a brand of Caterpillar, Komatsu, Liebherr, John Deere, Shantui.
In General, all bulldozers can be divided into three main categories: light (for landscaping), medium (for construction works), and heavy (for mining).
The ratio of the main technical parameters and prices can be represented as follows:
Light, 80 HP, 8 tons, worth $64,000 – $90,000
Light, 92 HP, 8 tons, cost $83,000 – $125,000
Average, 130 HP, 13 t, cost $160,000 – $295,000
Average, 205 HP, 20 tons, cost $170,000 – $340,000
Heavy, 600 HP, 70 tons, cost $400,000 – $1,200,000
Heavy, 850 HP, 104 tons, cost $600,000 – $1,300,000
Compare bulldozers of the middle class in technical characteristics
|Operating weight, t||19,5||19,5||17|
|Engine model||Komatsu S6D125E||CAT C9||Shanghai C6121|
|Engine power, kW||172||159||131|
|The maximum capacity of the blade.||5,6||5,6||5|
|Application features||Designed for use in quarries, on large construction sites. Also widely used in the construction of the zero cycle of work, household activities and in industry. Designed to work in most climate zones.||Designed to move large volumes of materials and soils of 1-3 categories to a distance of 350m. Can be operated at altitude up to 3000 m. Allows you to work with frozen soil and loose soil, also used for the development of rock.||Designed for all types of excavation works on soils with low bearing capacity. With smart design and superior performance, the technique can be applied in any climatic zone from North to South|
|Operating weight, t||50||49||53|
|Engine model||Komatsu SDA6D140E||CAT 3408Е||Cummins KTA19-C525|
|Engine power, kW||305||330||310|
|The maximum capacity of the blade.||16,6||13,5||16|
|Application features||Construction and quarry work (leveling and the removal of soil, tillage, leveling surfaces, backfilling trenches, the movement of goods and others); construction of dams and levees; profiling of embankments and unpaved roads; clearing the area of stumps, trees and other objects; mining; construction and repair works of the roadway, channels, structures, buildings. KOMATSU D275A-5 – versatile machine. Wing angles help, rippers, extenders, otkazniki and more interchangeable equipment can significantly extend the functionality of a bulldozer.||Bulldozer copes with the unloading and loading operations, with planned interventions for the treatment site excavation and complex tasks of spatial planning and garbage collection. When performing works with the soil up to IV category does not require preliminary loosening. Great advice on the application of the machine is fixed when using in forest management when coping with fire emergency situations of any complexity.||Oil, gas and mining industry. The main scope of the Shantui SD42 considered to be a major mining development. The machine freely adapts to tough conditions. The bulldozer can perform the following operations: the movement of large chunks of soil; cleaning of the territory from different subjects; operations in the construction industry; the creation and liquidation of pits, trenches, channels, ditches; forming of embankments. SHANTUI SD42 – high-performance and reliable earth moving equipment, able to work effectively in difficult conditions.|
Before proceeding to the selection of a model of dozer, it is very important to solve one of the most important questions are: new or with time?
Apart from its incredible efficiency, bulldozers are one of the most expensive types of equipment. Businesses of any direction always follow the path of reducing costs and increasing competitiveness. In many enterprises one of the most common ways of achieving these objectives, the purchase of equipment with operating time. Fresh bulldozer with operating time shows almost the same efficiency as a new car, at a price 30-70% less.
Main features of bulldozer operating time:
- Considerably lower price. On average, the bulldozer with operating time is 30-70% cheaper than new cars. For example, the model of medium size with the power of the engine of about 300 HP with operating time from 1900 to 5000 hours can cost anywhere from $45,000 to $160000. It is important that primary attachments typically also has a significant operating time, so you need to make sure that it matches the wear life of the machine.
- Reliability: the Bulldozers are designed to work in the hardest (extreme) conditions over decades. While every specific work environment will dictate the maximum service life of machines, bulldozers are uninterrupted work at least 10,000 hours without any major repairs – and much longer with proper maintenance. This resource provides significant efficiency initial investment.
- Older technology: Certainly, the market of bulldozers with mean time any suggestions for vehicles produced decades ago: the technical equipment of these machines lags far behind modern and, consequently, leads to lower efficiency. But more recent models released in the range of 10 years ago, have almost the same technical characteristics as the new: high power engine, high-precision control of the joystick, the optimal design of the cab, maneuverability, high performance.
The issue of service, support and warranty.
One of the most important aspects when choosing the manufacturer of the bulldozer – the question of availability and ease of maintenance. In order to increase the maximum life and see the maximum efficiency of the machine, it is necessary properly to maintain its condition. Manufacturers like Caterpillar, Komatsu, Shantui, have advantages in the form of a large network of dealer and service centres using original spare parts and consumables for maintenance and repair of equipment.Also, due to the popularity and prevalence of these machines makes, there are many unauthorized service centers that work with bulldozers these manufacturers, using original spare parts and their cheaper counterparts. This situation is a clear advantage when selecting a bulldozer.
Working equipment bulldozers
Is a large Fang on the back of the bulldozer. Used for loosening compacted soil, hard surfaces, frozen earth and other unyielding surfaces. Depending on working conditions, Ripper can have 1 to 3 fangs with standard cultivation depth 13 inches, usually made of high-strength alloy steel. It should be noted that a single-tooth rippers often provide greater depth of loosening than mnogoborya.
The choice of blade is usually a vital issue with the purchase of a bulldozer. Is a heavy metal plate located on the front of the machine, whose main objective – move (pull) of materials such as soil, sand, stone, waste. There are a number of configurations, dozer blades, designed for different purposes. Sizes range from 2.6 to 4.6 m.
- Straight blade
The most common type of bulldozer blade. The straight blade has the shape of a large rectangle. Primarily used for clearing surfaces, layout and movement of material on site. Operated by hydraulics, and has the ability to tilt for digging, although digging depth is somewhat limited. The weight and geometry of the straight blade allow you to show the best performance in terms of working with medium and thick materials such as clay and earth.
- Universal blade
Structurally has a greater height than a straight and a slight bend and side flaps on each end to hold the material inside the blade during operation. This type of blade is designed for longer visits work and allows the bulldozer to move material through an entire field or area. Therefore it is ideal for moving stone and gravel, gravel and pieces of concrete. In addition, it provides a highly productive movement of the earth in the far distance. As a straight, universal blade is adjustable hydraulically.It has the tilt cylinders that allow you to perform tasks for the destruction of land of medium complexity, such as digging ditches, making this kind of equipment is popular in road maintenance and construction.
- Semi-universal blade
In the semi-universal blade integral design and functionality of the straight and universal blades to provide a wider range of functionality. Although semi-u blade usually has weaker characteristics for the development of land than straight, it has side flaps to keep the material inside the blade. Designed primarily to work with soft and medium-hard surfaces, semi-u blade not so successfully cope with the solid due to the smaller depth.In such cases, it can work along with the Ripper, which will prepare and loosen the surface. With this in mind, semi-u blade copes by filling, ditching and establishment of trees, leveling of the surface and removal of stumps.
- The rotary blade
The rotary blade is more maneuverable version of the live blade. It has a rectangular shape and is attached with a C-frame that allows it to swing left and right. Modern versions are controlled by hydraulics and also have the horizontal bias for the operation of the digging. As in the case with a straight blade, its shape allows the spillage of material from both sides and makes moving long distances is inefficient.Originally designed for General bulldozer work, including leveling, ditching and removal of stumps, it is also ideal for cleaning and maintenance and construction of roads.
- Full-circle blade (PAT)
Initially it is a straight blade which allows the operator to adjust using hydraulic angle and tilt of the blade. It has the same rectangular a form and used mainly for soft and medium-hard soils. He also designed to work on the movement of material for short distances and not has side plates that prevents spillage so it can prevent spillage when working on smooth surfaces. Heaps of PAT be compatible with the machines with a track width STD and LGP, working with the weight of the material to approximately 3200 kg.