CAT 320 D2

The Cat 320D2 is a 21-ton class hydraulic excavator manufactured by Caterpillar, an American company and global leader in construction equipment. This particular unit is built in Japan and is widely used in construction, quarry, road building, pipeline installation, and general excavation work. Known for reliability, fuel efficiency, and easy maintenance, the 320D2 is popular in second-hand markets worldwide. Key Specifications Model: Cat 320D2 Operating Weight: 21,000 kg Engine Power: 103 kW (138 hp) Bucket Capacity: 1.0 - 1.4 m³ Max Digging Depth: 6,560 - 6,720 mm Max Digging Radius: 9,820 - 9,890 mm Max Dumping Height: 6,490 mm Travel Speed: 5.4 km/h Main Pump Flow: 428 L/min System Pressure: 35 MPa (5,076 psi) Track Shoe Width: 600 - 790 mm optional Track Gauge: 2,200 mm Engine The 320D2 is powered by the Cat C4.4 or C6.4 ACERT diesel engine, delivering 103 kW at 2,000 rpm. This engine features ACERT technology that reduces emissions while maintaining fuel efficiency. The mechanical fuel system with low-pressure design makes the engine more tolerant of variable fuel quality often encountered in emerging markets. The engine meets Tier 3 or Stage IIIA emission standards, allowing export to most regions including Southeast Asia, Africa, Middle East, and South America. Hydraulic System The hydraulic system uses a variable displacement piston pump with total flow of 428 L/min. System pressure reaches 35 MPa. The advanced hydraulic design provides precise control for digging, lifting, swinging, and traveling. Boom and stick regeneration valves recycle oil flow during boom down and stick in operations, significantly reducing fuel consumption and increasing cycle speed. The hydraulic system is matched to the engine for optimal performance and efficiency. Undercarriage The 320D2 features a modified X-frame undercarriage structure that provides extended service life. Standard track shoe widths include 600 mm, 700 mm, and 790 mm depending on configuration. Track gauge is 2,200 mm. The sealed and lubricated track link between pins and bushings reduces wear and operating noise. Each side has 7 track rollers and 2 carrier rollers. The track frame is reinforced for heavy duty applications. Boom and Stick The boom and stick are robotically welded for consistent quality and structural integrity. Heavy duty pins and bushings extend component life. The 320D2 can be equipped with various boom and stick lengths to suit different applications including general construction, quarry work, and long reach operations. Operator Cab The ROPS certified cab meets international safety standards. Large glass areas provide excellent visibility to all sides of the machine. The suspension seat is adjustable to reduce operator fatigue during long shifts. Pilot operated control levers require minimal effort. An advanced monitoring system displays real time machine data including engine RPM, coolant temperature, hydraulic oil temperature, fuel level, and service reminders. Air conditioning and heater are available on most units. Safety Features The hydraulic activation lever safely locks all hydraulic functions when engaged. A full length firewall separates the pump compartment from the engine compartment. A ground level fuel cutoff switch allows emergency engine shutdown from outside the cab. Anti-slip plates cover the track frames. A reverse alarm sounds when backing up. Maintenance Most service points are accessible from ground level, reducing daily maintenance time. All filters are grouped together for faster replacement. The radiator and oil cooler are side by side for easy cleaning. Pressure taps and S O S sampling ports help maximize machine uptime. The 500 hour filter change interval reduces operating costs. Technology Product Link telematics system reports key machine information including location, hours, fuel usage, and maintenance alerts to any remote location via the web.