CAT 321

CAT 321 Hydraulic Excavator is a fuel-efficient, all-purpose machine designed to deliver high productivity, durability, and low operating costs. Powered by the reliable Cat C3.6 engine, it offers strong torque, fast cycle times, and smooth operation, making it ideal for a wide range of construction and excavation applications.

Built with reinforced structures and advanced electrohydraulic systems, the CAT 321 ensures precise control, reduced fuel consumption, and long service life. Its modern cab design enhances operator comfort and safety, while extended service intervals and easy maintenance features help minimize downtime and maximize profitability.

Key Features

• High performance with low fuel consumption
• Advanced electrohydraulic control system
• Durable reinforced structures for harsh conditions
• Comfortable and ergonomic operator cabin
• Reduced maintenance and extended service intervals
• Built-in safety features and excellent visibility

Technical Specifications

• Technical Specifications
• Engine Power (ISO 14396): 100 kW (134 hp)
• Net Power (ISO 9249): 96 kW (129 hp)
• Displacement: 3.6 L
• Engine Speed: 2000 rpm
• Biodiesel Compatibility: Up to B20

Operating Weight

• 19,300 kg (42,600 lb)

Hydraulic System

• Maximum Flow: 315 L/min
• Maximum Pressure (Implement/Travel): 35,000 kPa (5,075 psi)
• Swing Pressure: 25,000 kPa

Swing Mechanism

• Swing Speed: 10 rpm
• Maximum Swing Torque: 61 kN·m

Applications

• Data centers
• Hospitals and healthcare
• Industrial plants
• Oil & gas sites
• Mining and remote operations
• Backup and continuous power systems

Bucket & Working Equipment

• Bucket Capacity: 1.0 m³ (General Duty)
• Boom Length: 5.7 m
• Stick Length: 2.25 m

Working Range

• Maximum Digging Depth: 5970 mm
• Maximum Reach at Ground: 9150 mm
• Maximum Cutting Height: 9120 mm
• Maximum Loading Height: 6250 mm

Digging Forces

• Bucket Digging Force: 135 kN
• Stick Digging Force: 119 kN

Dimensions

• Machine Length: 9570 mm
• Transport Width: 2800 mm
• Height (Top of Cab): 3250 mm
• Ground Clearance: 430 mm
• Tail Swing Radius: 2830 mm

Service Refill Capacities

• Fuel Tank: 370 L
• Hydraulic System: 218 L
• Engine Oil: 11 L
• Cooling System: 22 L

Performance & Efficiency Highlights

• Eco Mode and Smart Mode for optimized fuel use
• Automatic engine control reduces idle fuel consumption
• Fast cycle times with smooth and precise operation
• Advanced filtration systems for longer engine life

Safety & Comfort

• Anti-skid plates and safe access design
• Rearview camera and wide visibility
• LED lighting for night operations
• Spacious, low-noise cabin with climate control
• Ergonomic controls for reduced operator fatigue