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The Caterpillar E70B is a versatile and powerful track-type excavator widely valued in construction and earthmoving applications. It combines efficient power output, robust undercarriage design, and precise hydraulics, resulting in smooth operation and reliable performance across various jobsite challenges. This detailed article presents a comprehensive look at the E70B’s specifications, features, operating benefits, and maintenance considerations.
Engine and Power
The Caterpillar E70B is powered by the Mitsubishi 4D32 engine, a 4-cylinder diesel unit delivering approximately 54 horsepower (40.3 kW) at 1800 rpm. This engine provides ample power for medium-duty excavating operations while maintaining good fuel efficiency and reliability. The 217.9 cubic inch (3.6 L) displacement contributes to strong torque and smooth load handling.
Undercarriage and Track System
The E70B’s undercarriage offers a track gauge of about 1750 mm (5.7 ft) and track shoe width of 450 mm (17.7 inches), creating a stable platform with ground pressure as low as 4.7 psi (32.4 kPa). This design enhances flotation and traction in challenging terrain conditions such as soft soil or uneven surfaces. Each side runs on 42 track shoes supported by 5 track rollers, providing durability and balanced wear.
Key dimensions related to the tracks include:
The hydraulic system features a pump flow capacity of approximately 35.4 gallons per minute (134 L/min), which supports rapid, precise movements of the boom, arm, bucket, and swing functions. The relief valve pressure is set around 4551 psi (31378 kPa), providing sufficient force for heavy digging and material handling.
Swing speed typically reaches 13.5 rpm, giving the operator efficient rotational control. The operating voltage is 12 volts with a 50-amp alternator ensuring stable electrical power supply.
Operating Parameters
With an operating weight close to 15,256 pounds (6,920 kg), the E70B balances power and mobility. Its fuel tank capacity of 29.1 gallons (110 L) allows extended runtime between refueling. The cooling system holds about 4.2 gallons (16 L) of fluid, while the hydraulic system capacity stands at 27.7 gallons (105 L), emphasizing the importance of regular fluid checks to maintain system efficiency.
Performance Highlights
The machine offers a range of boom and stick configurations enabling maximum digging depths from 10.1 feet (3,070 mm) to 15.1 feet (4,595 mm) depending on the setup. Maximum reach along the ground spans approximately 19.5 feet (5,930 mm) to 22 feet (6,720 mm), accommodating diverse excavation scenarios.
Bucket capacities vary between 0.18 to 0.44 cubic yards (0.14 to 0.34 cubic meters), appropriate for general construction, utility, and landscaping operations.
Comfort and Operator Features
Operators benefit from a cab height of around 8.4 feet (2,570 mm) offering spacious room and excellent visibility. The control layout supports intuitive operation with pilot controls, a power and work mode selector, and advanced hydraulic systems reducing operator fatigue during long workdays.
Maintenance Considerations
Routine maintenance focuses on:
A utility contractor praised the E70B for its stable track system allowing confident operation in wet and uneven terrain. The operator noted the benefit of the machine’s multiple boom options, empowering them to tackle a variety of excavation tasks with minimal equipment changeover. The fuel efficiency and ease of maintenance contributed to high uptime during a busy project schedule.
Summary
The Caterpillar E70B track excavator combines powerful Mitsubishi engine performance with a robust hydraulic system and stable undercarriage design to meet the demands of construction, earthmoving, and utility sectors. Its compact yet powerful features, range of operator comforts, and straightforward maintenance requirements make it a reliable and productive choice for medium-scale excavation projects. Understanding its specifications and operational capabilities helps operators maximize productivity and machine longevity in diverse work environments.
Engine and Power
The Caterpillar E70B is powered by the Mitsubishi 4D32 engine, a 4-cylinder diesel unit delivering approximately 54 horsepower (40.3 kW) at 1800 rpm. This engine provides ample power for medium-duty excavating operations while maintaining good fuel efficiency and reliability. The 217.9 cubic inch (3.6 L) displacement contributes to strong torque and smooth load handling.
Undercarriage and Track System
The E70B’s undercarriage offers a track gauge of about 1750 mm (5.7 ft) and track shoe width of 450 mm (17.7 inches), creating a stable platform with ground pressure as low as 4.7 psi (32.4 kPa). This design enhances flotation and traction in challenging terrain conditions such as soft soil or uneven surfaces. Each side runs on 42 track shoes supported by 5 track rollers, providing durability and balanced wear.
Key dimensions related to the tracks include:
- Length of track on the ground: approximately 2000 mm (6.6 ft)
- Ground clearance: about 300 mm (0.98 ft)
- Tail swing radius: roughly 1750 mm (5.7 ft)
The hydraulic system features a pump flow capacity of approximately 35.4 gallons per minute (134 L/min), which supports rapid, precise movements of the boom, arm, bucket, and swing functions. The relief valve pressure is set around 4551 psi (31378 kPa), providing sufficient force for heavy digging and material handling.
Swing speed typically reaches 13.5 rpm, giving the operator efficient rotational control. The operating voltage is 12 volts with a 50-amp alternator ensuring stable electrical power supply.
Operating Parameters
With an operating weight close to 15,256 pounds (6,920 kg), the E70B balances power and mobility. Its fuel tank capacity of 29.1 gallons (110 L) allows extended runtime between refueling. The cooling system holds about 4.2 gallons (16 L) of fluid, while the hydraulic system capacity stands at 27.7 gallons (105 L), emphasizing the importance of regular fluid checks to maintain system efficiency.
Performance Highlights
The machine offers a range of boom and stick configurations enabling maximum digging depths from 10.1 feet (3,070 mm) to 15.1 feet (4,595 mm) depending on the setup. Maximum reach along the ground spans approximately 19.5 feet (5,930 mm) to 22 feet (6,720 mm), accommodating diverse excavation scenarios.
Bucket capacities vary between 0.18 to 0.44 cubic yards (0.14 to 0.34 cubic meters), appropriate for general construction, utility, and landscaping operations.
Comfort and Operator Features
Operators benefit from a cab height of around 8.4 feet (2,570 mm) offering spacious room and excellent visibility. The control layout supports intuitive operation with pilot controls, a power and work mode selector, and advanced hydraulic systems reducing operator fatigue during long workdays.
Maintenance Considerations
Routine maintenance focuses on:
- Checking and replacing hydraulic and engine oils
- Inspecting track tension and integrity of track components such as rollers and idlers
- Monitoring filter conditions for air, fuel, and hydraulic fluids
- Maintaining cooling system fluid levels and radiator condition
- Performing periodic inspections of swing drive systems
- Track Gauge: Distance between the centers of the two tracks, influencing stability.
- Pump Flow Capacity: The volume of hydraulic fluid delivered per minute to power actuators.
- Relief Valve Pressure: Maximum hydraulic pressure the system maintains before releasing excess to prevent damage.
- Tail Swing Radius: The radius the rear portion of the machine swings during operation.
- Pilot Controls: Hydraulic-operated joysticks or levers providing fine machine control.
- Ground Pressure: Pressure exerted by the machine on the ground, important for operating on soft soils.
A utility contractor praised the E70B for its stable track system allowing confident operation in wet and uneven terrain. The operator noted the benefit of the machine’s multiple boom options, empowering them to tackle a variety of excavation tasks with minimal equipment changeover. The fuel efficiency and ease of maintenance contributed to high uptime during a busy project schedule.
Summary
The Caterpillar E70B track excavator combines powerful Mitsubishi engine performance with a robust hydraulic system and stable undercarriage design to meet the demands of construction, earthmoving, and utility sectors. Its compact yet powerful features, range of operator comforts, and straightforward maintenance requirements make it a reliable and productive choice for medium-scale excavation projects. Understanding its specifications and operational capabilities helps operators maximize productivity and machine longevity in diverse work environments.
