Kobelco SK 70 SR

Company name:LONG WAY TRADING CO.,LTD Address:1898th Zaoxiang road ,Anyang City ,Henan province,China Contact: Nancy Tel : +8617739124690 WhatsApp:0086 13636464634 Wechat:17739124690 Email:

# Kobelco SK70SR-2 Short Radius Mini Excavator ## 1. Model Positioning SR stands for Short Radius tail swing, a 7-ton Japanese imported compact excavator. Rear swing radius only 1290mm, rear counterweight barely overhangs tracks. Ideal for narrow municipal sites, indoor demolition, residential renovation, green space works, basement excavation. Famous for low fuel consumption, smooth & precise operation. ## 2. Main Machine Dimensions & Weight - Operating Weight Standard 600mm steel track shoe: 7,350 kg Narrow 450mm track shoe: approx. 7,100 kg - Standard Bucket Capacity (SAE heaped): 0.28 m³ Modified large bucket for domestic market: 0.35 m³ - Standard Arm Length: 1,710 mm - Transport Dimensions (L × W × H): 5,830 × 2,320 × 2,630 mm - Track Parameters Total track width: 2,320 mm Track gauge: 1,870 mm Track ground contact length: 2,240 mm Total track length: 2,860 mm Minimum ground clearance: 360 mm Rear swing radius: 1,290 mm (core compact advantage) - Fluid Capacities Fuel tank: 120 L Hydraulic tank: 72 L, total hydraulic system oil: 90 L Engine oil: 11 L Coolant: 8.5 L ## 3. Powertrain (Isuzu Original Engine) Model: ISUZU AU-4LE2X Water-cooled 4-cylinder inline turbocharged & intercooled diesel - Rated Power: 41 kW (56 HP) / 2,200 rpm - Displacement: 2.179 L - Bore × Stroke: 85 mm × 96 mm - Max Torque: ~185 N·m - Fuel Consumption: ~4 kg/h in Standard S mode; ~4.3 kg/h in Heavy H mode, best-in-class fuel efficiency among same tonnage ## 4. Hydraulic System (Kobelco SS7 Short Radius Special Hydraulics) - Main Pump: Dual variable displacement piston pump + pilot gear pump, total flow 132 L/min - Main Circuit Pressure: 29.4 MPa (digging & travel) - Swing Circuit Pressure: 24.5 MPa - Control Valve: 6-spool valve, standard pilot operation, breaker piping optional - Cooling System: Forced air-cooled hydraulic oil radiator, stable performance under high-temperature working conditions ## 5. Working Performance - Travel Speed: Low 2.8 km/h / High 5.3 km/h - Swing Speed: 11.5 rpm - Gradeability: 70% (35°) - Digging Force Bucket breakout force: 52.7 kN Arm breakout force: 39.4 kN - Working Range (standard 1,710mm arm) Max digging depth: 4,160 mm Max digging height: 7,390 mm Max digging reach: 6,460 mm Min front swing radius: 1,760 mm - Ground Pressure (600mm track shoe): 247 kPa ## 6. Difference between SK70SR-1 (Old Generation) - Engine: ISUZU CC-4JG1, 40.5 kW / 2,100 rpm, non-turbo - Lighter operating weight: 6,700 kg - Same standard bucket capacity 0.28 m³, lower hydraulic flow & weaker power, mostly seen in second-hand market ## 7. Advantages & Disadvantages ### Advantages 1. Ultra-short tail design, no extra space required for sidewall construction 2. Reliable Isuzu turbo engine, widely available spare parts & low fuel burn 3. Smooth compound hydraulic movement, excellent performance for grading & precision digging 4. Full Japanese original assembly, robust frame & counterweight structure, high resale value ### Disadvantages 1. Small standard factory bucket, lower earthmoving efficiency vs conventional long-tail 7-ton excavators 2. Compact counterweight for short tail limits heavy lifting capacity 3. Higher new machine purchase price compared with domestic 7-ton excavators ## 8. Applicable Working Scenarios Residential pipeline renovation, pavement excavation, indoor demolition, basement earth removal, landscaping, narrow factory maintenance, indoor breaker work, old town municipal pipeline construction Would you like a concise one-page English spec sheet version for customer quotation?