حفارة مجنزرة Komatsu PC78US

Basic Machine Data
Model: Komatsu PC78US-10 compact short-radius crawler excavator
Operating weight (standard enclosed cab, 450mm steel tracks, standard stick + front dozer blade): 7910 kg
Wide track (600mm shoes) version weight: 8080 kg
Standard heaped bucket capacity (ISO): 0.20 m³
Bucket capacity range: 0.09 ~ 0.34 m³
Standard track shoe width: 450 mm triple grouser steel tracks; rubber track pads optional
Short rear tail swing radius: 1280 mm
Offset swing boom, lateral boom swing left/right for tight space operation
Ground contact pressure (450mm tracks): 39.8 kPa
Engine System
Engine Model: Komatsu SAA4D95LE-6 inline 4-cylinder turbocharged common rail diesel
Displacement: 3.26 L
Bore × Stroke: 95 mm × 115 mm
Gross power (ISO 14396): 50.7 kW (68 hp) @ 1950 rpm
Net power (ISO 9249): 48.8 kW (65.5 hp) @ 1950 rpm
Max torque: 320 N·m @ 1500 rpm
Emission standard: Tier 4 Final / EU Stage IV (KDOC passive regeneration, no DPF service maintenance)
Fuel tank capacity: 125 L
Working modes: Power / Economy dual modes + auto idle & auto deceleration to cut fuel consumption
Hydraulic System
Komatsu HydrauMind closed-center load-sensing hydraulic system
Dual variable displacement piston main pumps
Main circuit relief pressure: 29.4 MPa
Bucket breakout force (ISO): 53.3 kN
Arm breakout force (ISO): 38.1 kN
Independent dedicated pump for front dozer blade
Factory pre-plumbed auxiliary hydraulic piping for breaker, grapple, tilt bucket attachments
Travel & Slewing Performance
Low travel speed: 2.8 km/h
High travel speed: 5.0 km/h
Slewing speed: 10.0 rpm
Maximum drawbar pull: 68.2 kN
Maximum gradeability: 35° (70%)
Hydraulic track tension adjustment, sealed track chains
Working Range (Standard Boom & Stick)
Maximum digging depth: 4660 mm
Vertical wall digging depth: 3980 mm
Max ground-level horizontal reach: 6920 mm
Maximum digging height: 7480 mm
Maximum dumping height: 5420 mm
Front Dozer Blade Parameters
Blade overall width: 2330 mm
Max blade lifting height: 435 mm
Max blade cutting depth: 510 mm
Equipped with float function for flat ground leveling
Overall Transport Dimensions
Total machine length: 6270 mm
Overall machine width (450mm tracks): 2330 mm
Transport height (cab top): 2945 mm
Minimum ground clearance: 365 mm
Service Fluid Capacities
Engine lubricating oil: 11.5 L
Coolant total volume: 13.0 L
Hydraulic oil tank volume: 56 L
Swing gearbox oil: 2.0 L
Each final drive oil: 1.1 L
Operator Cabin & Standard Configuration
ROPS & FOPS certified fully enclosed vibration-isolated operator cabin
Standard factory air conditioning, high-back adjustable suspension seat
PPC proportional pilot joystick, two control operation patterns switchable
7-inch color intelligent monitor with real-time working data, fuel consumption statistics, fault self-diagnosis & anti-theft lock
Hydraulic safety lock lever, boom & arm load holding valves factory fitted
Komtrax remote fleet telematics monitoring system standard equipped
Centralized lubrication service points for simple daily maintenance