Caterpillar D8R: technical specifications, review, description

Home » Catalog » Equipment for open-pit mining » Bulldozers » Bulldozer CAT D8R CAT D8R is one of the line of famous high-power bulldozers from Caterpillar. Among its “comrades”, the D8R has the smallest blade - a capacity of 8.7 m³.

Offering a variety of blades, supplied complete and optional, the company offers a wide range of tools for performing various excavation work: rippers, cutting edges, rear counterweights, winches. In addition to the above-mentioned accessories, the CAT D8R bulldozer is supplied with original Caterpillar spare parts and more than 50 items of equipment installed on special order.

The machine is operated in difficult working conditions and performs the following functions:

• Moving cargo (rock, soil, bulk materials).
• Excavation work (leveling construction sites, layer-by-layer cutting of layers of earth, quarry work).

Engine

The Caterpillar D8R (Series II) bulldozer is equipped with a turbocharged 3408E engine, charge air cooler and electric unit injector fuel injection system. The engine cylinder blocks are made of gray cast iron (this metal has high tensile strength), the crankshaft is made of carbon steel, subjected to full heat treatment. The reliability of the design is increased by reducing the number of mechanical connections.

Power elements Caterpillar D8R

An important design element is the torque divider: 70% of the torque is transmitted through the torque converter, 30% through the planetary gear. Thanks to this solution, it was possible to increase the efficiency of the power transmission and increase torque when working with heavy loads.

Like other modern Cat dozer models, the D8R features raised final drives. This solution allows you to isolate them from the influence of the soil, as well as eliminate shock loads.

Photo source: cat.com The engine power installed on the Caterpillar D8R bulldozer is 338 hp.

The operation of the hydraulic system pumps of the Caterpillar D8R bulldozer is differentiated: one of them is activated when turning, the second is connected to the working equipment.

Thanks to precise modulation of the individual clutches, gear shifting is smoother.

Caterpillar D8R description

Caterpillar D8R (Series II) is a bulldozer in the 37 ton class with an engine power of up to 252 kW. The model's blade is one of the most spacious among analogues

The Caterpillar D8R (Series II) bulldozer is equipped with a turbocharged 3408E engine, charge air cooler and electric unit injector fuel injection system. The engine cylinder blocks are made of gray cast iron (this metal has high tensile strength), the crankshaft is made of carbon steel, subjected to full heat treatment. The reliability of the design is increased by reducing the number of mechanical connections.

An important design element is the torque divider: 70% of the torque is transmitted through the torque converter, 30% through the planetary gear. Thanks to this solution, it was possible to increase the efficiency of the power transmission and increase torque when working with heavy loads.

Like other modern Cat dozer models, the D8R features raised final drives. This solution allows you to isolate them from the influence of the soil, as well as eliminate shock loads.

The operation of the hydraulic system pumps of the Caterpillar D8R bulldozer is differentiated: one of them is activated when turning, the second is connected to the working equipment.

Thanks to precise modulation of the individual clutches, gear shifting is smoother.

To reduce the harmful effects of noise and vibration on the operator, the Caterpillar D8R bulldozer cab is mounted on insulating supports (noise level is 85 dB). The seat is fully adjustable.

When designing the bulldozer, preference was given to a single control handle with push-button gear shift. Using only one hand, you can change the direction of movement, make turns, and also select the desired gear. And for safer operation, a work equipment locking valve has been added.

In addition to different types of working equipment, a double tilt function is available: when using this mode, a larger tilt angle is achieved, while with a single tilt, the breakout force is higher. The stabilizer beam allows you to place the blade closer to the body, thereby improving the accuracy of the work.

A special feature of this part of the Caterpillar D8R bulldozer is its high-mounted drive sprockets. Thus, two goals were achieved: the balancing of the machine was improved and the service life of the chassis elements was increased. The pins in the track belt are rigidly fixed (Caterpillar's own design), allowing the design to withstand higher shock and force loads.

The frame spars have a closed box-shaped section (the geometry of the nodes is better preserved). The main elements of the chassis are reinforced with durable steel castings.

The operator of the Caterpillar D8R bulldozer has a differential steering and braking control system, with which specialists have achieved continuous power delivery to both tracks. It is possible to simultaneously increase the speed of one track and slow down the other. As a result, the bulldozer can withstand loads better. The work cycle has also been shortened.

Thanks to the use of the modular principle, dismantling one element does not require influencing other components. And for quick diagnostics of the main functions of the bulldozer, a laptop computer is connected. The electrical system components are protected by sealed connectors.

The caterpillar d8r bulldozer is available in a standard version, as well as a non-suspension version and an LGP version.

Comparable competitor models in terms of technical characteristics are: Michigan 280C, Komatsu D155A-5, Caterpillar D8T.

Get an advantageous offer from direct suppliers:

Cabin and controls

To reduce the harmful effects of noise and vibration on the operator, the Caterpillar D8R bulldozer cab is mounted on insulating supports (noise level is 85 dB). The seat is fully adjustable.

When designing the bulldozer, preference was given to a single control handle with push-button gear shift. Using only one hand, you can change the direction of movement, make turns, and also select the desired gear. And for safer operation, a work equipment locking valve has been added.

Photo source: cat.comThe operator's seat in the Caterpillar D8R cab is fully adjustable

In addition to different types of working equipment, a double tilt function is available: when using this mode, a larger tilt angle is achieved, while with a single tilt, the breakout force is higher. The stabilizer beam allows you to place the blade closer to the body, thereby improving the accuracy of the work.

DEVICE

Castings and a reinforced frame give the Cat D8R the strength it needs. The chassis uses a tubular frame with road wheels, making the bulldozer very maneuverable. The high location of the drive sprockets increases the stability and service life of the chassis elements. The fingers in the track belt are secured with rigid fixation, which allows them to withstand extreme loads.

Chassis characteristics (standard/LGP):

• shoe width – 610/965 mm;
• number of shoes (on one side) – 44/44;
• number of road wheels (on one side) – 8/8;
• track pitch – 216/216 mm;
• contact length of the tracked part with the ground – 3206/3206 mm;
• contact area of ​​the tracked part with the ground – 3.91/6.19 sq.m;
• ground pressure – 95.1/55.8 kPa.

The Cat D8R features a new transmission with electronic gear selection and power shift capability. The design of the element contains a torque divider, which directs 70% of the torque to the torque converter, 30% to the planetary gear. As a result, transmission efficiency increases. Precise clutch modulation ensures smooth gear changes.

The bulldozer can move in the following modes (forward/backward):

• 1st gear – 0-3.5/0-4.7 km/h;
• 2nd gear – 0-6.2/0-8.1 km/h;
• 3rd gear – 0-10.8/0-13.9 km/h.

The Cat D8R features load-sensing hydraulics. The performance of the piston pump is 239 l/min. The maximum pressure of the safety valve is 24100 kPa.

The bulldozer cabin is mounted on insulating supports and has built-in ROPS protection. There is a heating system and air conditioning inside to maintain a comfortable temperature. A comfortable seat and noise-insulating upholstery (noise level in the cabin is no more than 85 dB) allow the operator to fully concentrate on work. The controls are represented by a single handle with speed shift buttons.

Dimensions

Specifications Caterpillar D8R

Caterpillar D8R video

Reviews of Caterpillar D8R

1. L-shaped push bars - allow you to move the blade as close to the machine as possible, providing maneuverability.
2. A hydraulic system that effectively responds to changing operating conditions and makes the necessary adjustments.
3. Cat blades that allow you to use equipment in the most difficult conditions.
4. Multi-shank ripper – prepares the soil for direct bulldozing work. This is important when working with hard types of soil.
5. Rear counterweight for perfect balance when moving backwards.

The operator's workplace offers a fairly wide visibility, which ensures high precision in the work. The operator's seat is air suspended and fully adjustable. The armrests are also adjustable. The cabin has a radio and air conditioning that allows you to maintain the necessary microclimatic conditions.

When performing any work with a fairly high load, some structural elements are most often subject to shock loads and torsional forces. But in order to be resistant to these phenomena, these parts are made by forging. This solution allows you to significantly increase the operational life of the machine. The suspension design itself is made in a classic form for such machines, since it is this structure that is most suitable for working in difficult conditions.

Chassis

A special feature of this part of the Caterpillar D8R bulldozer is its high-mounted drive sprockets. Thus, two goals were achieved: the balancing of the machine was improved and the service life of the chassis elements was increased. The pins in the track belt are rigidly fixed (Caterpillar's own design), allowing the design to withstand higher shock and force loads.

The frame spars have a closed box-shaped section (the geometry of the nodes is better preserved). The main elements of the chassis are reinforced with durable steel castings.

Photo source: cat.comPhoto Caterpillar D8R

The operator of the Caterpillar D8R bulldozer has a differential steering and braking control system, with which specialists have achieved continuous power delivery to both tracks. It is possible to simultaneously increase the speed of one track and slow down the other. As a result, the bulldozer can withstand loads better. The work cycle has also been shortened.

DESCRIPTION AND PURPOSE

Caterpillar D8R is a bulldozer of a famous American brand. When creating the machine, the safety requirements for equipment of this class and the possibility of increasing productivity were taken into account. The result is a reliable and powerful bulldozer. Modern technologies used in its development made it possible to perform the maximum number of operations per unit of time.

The scope of application of the Caterpillar D8R is quite wide. The bulldozer can be used in areas with temperatures from -40 to +40 degrees. The model is suitable for performing various works related to the ground:

• leveling construction sites with large areas;
• layer-by-layer cutting of soil;
• quarry work;
• demolition of structures and uprooting of trees;
• movement of various objects (bulk materials, stones, rocks, soil of categories 1-3).

Cat D8R bulldozers are especially in demand among companies in the mining and construction segment. The technique shows maximum efficiency when performing large volumes of work.

The Caterpillar D8R series includes several modifications:

• STD – standard version;
• LGP is a model for working on soft and wet soils. It is distinguished by a wide caterpillar part.

Consumers are also offered special versions for use in areas with a desert climate and for working with waste.

Maintenance

Thanks to the use of the modular principle, dismantling one element does not require influencing other components. And for quick diagnostics of the main functions of the bulldozer, a laptop computer is connected. The electrical system components are protected by sealed connectors.

Photo source: cat.com Diagnosis of the Caterpillar D8R bulldozer is carried out using a laptop computer

Bulldozer CAT D8R Caterpillar

Advantages

• The CAT 3406E engine is equipped with a modern electronic hydraulic drive system that reduces exhaust emissions and noise levels. Meets all international environmental safety requirements of EPA, EU and JMOC.
• The operator's cabin provides maximum comfort and convenience for work: indicators of emergency operation of the mechanism, a system for controlling the operation of the bulldozer developed by the company's engineers, a wide all-round view and an adjustable seat for increased comfort.
• All units for maintenance are made according to a modular principle (they are serviced without affecting other elements). Also, to quickly diagnose the condition of the CAT D8R bulldozer, a special connection socket has been created in the diagnostic system, which allows you to connect a laptop computer and carry out analysis.
• The company's dealers operate in more than 50 countries and, in addition to purchasing, offer the client a profitable bulldozer leasing or rental scheme.
• After purchase, warranty service is provided and, if necessary, fast delivery of CAT spare parts. Additionally, special maintenance programs for caterpillar tracks and oil sampling can be connected.

Specifications