Isuzu 6HK1-XQSA engine for Hitachi ZX330‑3 ZX330LC‑3 ZX350‑3 ZX350LC‑3 ZX350H‑5A ZX360LC‑3 ZX360H‑3 excavator
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+86 199 2461 6345
China, Hefei, Anhui
China, Hefei, Anhui
China, Hefei, Anhui
China, Hefei, Anhui
China
China
China
China
China
China, Hefei, Anhui
China
China
Belgium, TEMPLOUX
Lithuania, Vilnius
Netherlands, Wouw
Netherlands, Wouw
Italy, Cuneo
Netherlands, Dieren
Germany, Baienfurt
Romania, Targu Mrues
The 6HK1 series utilizes Isuzu’s advanced common-rail fuel injection system to deliver precise power while maintaining low emissions.
Type: 4-Cycle, Vertical, Water-cooled Diesel
Number of Cylinders: 6
Displacement: 7.79 Liters
Aspiration: Turbocharged with Intercooler
Combustion System: Direct Injection
Rated Power: Approx. 184–202 kW (246–271 HP) @ 1900–2000 RPM
Emission Compliance: Tier 3 / Stage IIIA Equivalent
2. Compatibility: Hitachi Zaxis Series
The "XQSA" configuration is engineered to integrate seamlessly with the Hitachi HIOS III hydraulic system found in the following models:
Zaxis 330 Series: ZX330-3, ZX330LC-3
Zaxis 350 Series: ZX350-3, ZX350LC-3, ZX350H-5A
Zaxis 360 Series: ZX360LC-3, ZX360H-3 (Heavy-duty and high-chassis variants)
3. Key Features for Heavy Excavation
Common Rail Fuel System: High-pressure injection ensures optimal combustion, providing better throttle response and significantly lower fuel consumption during heavy digging.
Robust Engine Block: The 6HK1 is built with a reinforced ladder frame and high-rigidity cylinder block to withstand the extreme vibrations and heat of mining and demolition sites.
Cooling Efficiency: Equipped with a large-capacity water pump and high-efficiency oil cooler, essential for maintaining stable temperatures during 24/7 operations.
4. Maintenance & Service Protocol
To ensure the 50,000+ hour potential lifespan of the 6HK1-XQSA, follow these critical intervals:
Engine Oil & Filter: Change every 500 hours using high-quality 15W-40 (CJ-4 or higher).
Fuel Filtration: The common rail system is highly sensitive. Replace the primary and secondary fuel filters every 500 hours and drain the water separator daily.
Valve Clearance: Inspect and adjust every 1,000 hours to maintain engine timing and fuel efficiency.
Turbocharger Inspection: Regularly check for shaft play or oil leaks to prevent debris from entering the combustion chamber.
5. Why Source From an Isuzu & Hitachi Expert?
Replacing an engine in a ZX350 class machine is a major investment. We provide:
Genuine Isuzu Parts: We offer original pistons, liners, injectors, and gasket kits to restore factory performance.
Complete Engine Assemblies: Available in Brand New Original or Expertly Remanufactured options, fully bench-tested before shipping.
Global Logistics: Shipped in heavy-duty, reinforced wooden crates via express air or sea freight to minimize machine downtime.
6. Frequently Asked Questions (FAQ)
-Is the 6HK1-XQSA interchangeable between the -3 and -5A models?
While the base engine block is similar, the ZX350H-5A often features updated electronic control modules (ECM) and different sensor configurations. Always verify your specific serial number before purchase.
-Why does my 6HK1 experience "low power" under load?
In common rail engines, this is often due to a restricted fuel flow or a failing SCV (Suction Control Valve). Check your fuel pressure and filters first.