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Detailed description of Caterpillar 308DCR excavator:

1. Equipment positioning and basic information

Tonnage and type:

The Caterpillar 308DCR is a small crawler backhoe excavator with a working weight of about 7.85 tons and a standard bucket capacity of 0.23-0.4m³. It is positioned as a compact equipment suitable for narrow urban construction sites, municipal engineering and farmland water conservancy.

Production background:

Designed by Caterpillar, some models are circulated in the Chinese market. The engine and key components are produced in Japan (such as Mitsubishi engines) and meet international emission standards (EPA Tier 2/CE certification).

2. Core parameters and performance

Power system

Engine:

Equipped with Mitsubishi 4M40 TL diesel engine, rated power 43kW (58 horsepower)/2200rpm, displacement 2.8L (some models are marked as 3.3L), water-cooled design, taking into account power output and fuel economy, and emissions meet Stage II standards.

Fuel and maintenance:

The fuel tank capacity is 125L, the engine oil replacement volume is 12.5L, and the coolant is 15.7L, which supports continuous operation and has low maintenance costs.

Hydraulic system

Main pump flow:

The maximum flow of the main pump is 127L/min, the main overflow pressure is 30.5MPa, and the total capacity of the hydraulic system is 94L, providing stable power output and supporting multi-task operations.

Operation optimization:

The optional "Cat Stick Steer" joystick steering mode improves the control flexibility under complex terrain.

Operation performance

Digging range:

The maximum digging depth is 4090mm, the maximum digging height is 7340mm, the maximum unloading height is 5310mm, and the digging radius of the parking surface is 6190mm, which is suitable for narrow space operations.

Travel speed is 5km/h (high gear), rotation speed is 10.8rpm, climbing ability is 30%-35%, and the ground contact pressure is low (track width is 450mm), which is suitable for soft ground.

Digging force:

Bucket digging force 57.1kN, digging force 57.1kN, meet the needs of small and medium-sized earthwork.

3. Structural and design features

Compact size:

Transport dimensions 5810×2320×2590mm (length×width×height), minimum ground clearance 385mm, tail turning radius 1290mm, suitable for urban road transportation and narrow construction sites.

Cab and comfort:

Equipped with a sealed pressurized cab, including air conditioning system, adjustable suspension seat and intelligent monitoring interface (such as Next Generation Monitor) to improve operating comfort.

Safety configuration:

Integrated reversing camera, fluorescent seat belts and work lights, in line with ISO safety standard 8.

4. Application scenarios and market positioning

Applicable fields:

Municipal maintenance, pipeline laying, landscaping and small earthwork projects, especially suitable for urban operations with limited space.

Competitive advantages:

Energy-saving and high efficiency: Adopting technologies such as automatic idle and variable displacement hydraulic pump, fuel consumption is reduced by 10%-15% compared with similar models;

Convenient maintenance: Service points are centrally designed, and routine maintenance can be completed through ground operations, reducing downtime.

5. Precautions and limitations

Technical limitations:

The hydraulic system is less efficient than the new electronically controlled models, and the operating accuracy is limited;

Some early models have Stage II emission standards, which may be restricted by environmental protection policies.