المحرك Isuzu 6HK1-XQSA لـ حفارة Hitachi ZX330‑3 ZX330LC‑3 ZX350‑3 ZX350LC‑3 ZX350H‑5A ZX360LC‑3 ZX360H‑3

1. Engine Specifications & Performance
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.