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Hitachi 360 (ZX360 series) Isuzu 6HK1 engine assembly
GH-6HK1XKSA-01 (5A): Rated net power 190kW/1900rpm (258hp); Maximum torque 1080N·m/1500rpm
Fuel system: Direct injection/High-pressure common rail electronic injection; Intake: Turbocharged + intercooled
Rexroth A8V022 compatible with Caterpillar, Doosan, and Hyundai
Rated operating pressure: 38 MPa (380 bar)
Peak pressure: 42 MPa (420 bar)
Maximum flow rate of dual pumps (2000 rpm): 898 L/min; 1800 rpm: 808 L/min
Pilot pump (integrated gear pump): Pressure 4.0–5.0 MPa (40–50 bar), flow rate ≥30 L/min
Operating speed: 1500–2200 rpm, optimal 1800–2000 rpm
Weight: Approx. 285–300 kg (dual pump assembly, including pilot)
Rated operating pressure: 34.3 MPa (343 bar)
Peak pressure: 39.2 MPa (392 bar)
Pilot pump pressure: 3.5 MPa (35 bar), pilot pump flow rate ≥22 L/min
Operating speed: 1800–2200 rpm, optimal operating range 1900–2000 rpm
Control method: Negative flow control + load sensitive (LS), matched to Komatsu-7 series hydraulic system logic
Rated Net Power: 42.1 kW / 2300 rpm (57.5 hp)
Operating Range: 41.6–43.7 kW / 2200–2300 rpm
Maximum Torque: 241 N·m / 1600 rpm
Compression Ratio: 21.4:1
Fuel System: Indirect Injection (IDI) / Mechanical Direct Injection
Caterpillar 320D hydraulic pump
Main pump overflow pressure: 35MPa (350bar)
Theoretical maximum flow rate: 404L
Pilot pump pressure: 3.5-4MPa (35-40bar)
Pilot pump flow rate: ≥25L
Operating speed: 1800-2200rpm
Caterpillar 349D hydraulic pump (K5V212 Kawasaki model)
Common Part Number: 503-8792 (for 336GC/330GC)
Net Power: 193.5–195 kW (259–261 hp, ISO 9249 standard)
Rated Speed: 2200 rpm
Displacement: 7.1 L (bore × stroke 105 × 135 mm)
Theoretical Displacement: 200 cm³/rev
Rated Pressure: 34.3 MPa (343 bar)
Peak Pressure: 39.2 MPa (392 bar)
Maximum Flow Rate per Pump: ≈ 400 L/min
Total Flow Rate of Two Pumps in Series: ≈ 800 L/min
Operating Speed: 1800–2000 rpm
Matching Engine Power: 250–300 HP
XCMG K5V212 main hydraulic pump
Peak pressure: 39.2 MPa (392 bar)
Pilot pump pressure: 3.5–4.0 MPa (35–40 bar)
Maximum flow rate of single pump (2000 rpm): 424 L/min
Maximum flow rate of dual pumps in series (2000 rpm): 848 L/min
Pilot pump flow rate: ≥25 L/min
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