Yanmar 3TNV88 engine for Hitachi ZX30U ZX33U ZX35U ZX38U mini excavator
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1. Application Compatibility
This engine is the core component for Hitachi’s popular mini excavator range:
Hitachi Zaxis Series: ZX30U, ZX30U-2, ZX30U-3, ZX30U-5
Hitachi Zaxis Series: ZX33U, ZX33U-5
Hitachi Zaxis Series: ZX35U, ZX35U-2, ZX35U-3, ZX35U-5
Hitachi Zaxis Series: ZX38U, ZX38U-5
Other Applications: Also compatible with certain John Deere models (30G, 35G) which share the Hitachi platform.
2. Technical Specifications
Engine Model: Yanmar 3TNV88
Type: 3-Cylinder, 4-Cycle, Liquid-Cooled Diesel
Aspiration: Naturally Aspirated
Bore x Stroke: 88 mm x 90 mm
Displacement: 1.642 Liters
Rated Output: 20.0 - 22.0 kW (Approx. 27 - 29 HP @ 2400-2500 RPM)
Emission Class: EPA Tier 4 Final / EU Stage V (depending on production year)
Combustion System: Direct Injection (DI)
Governor: Mechanical or Electronic (model dependent)
3. Key Engineering Advantages
Hitachi System Integration: Calibrated to match Hitachi’s hydraulic pump curves, ensuring that engine RPM stays stable even when the machine hits peak breakout force.
Compact High-Torque: Delivering nearly 100 Nm of torque, this engine allows the ZX38U to perform heavy grading and trenching tasks typically reserved for larger machines.
Fuel Efficiency: The Direct Injection system provides precise fuel atomization, reducing "wet stacking" during idle and lowering overall daily fuel consumption.
Low Vibration: Engineered with a rigid block and balanced crankshaft, which is vital for the ZX-U series where the operator sits directly above the engine compartment.
4. Supply Scope for Parts
Engine Assemblies: Brand new original Yanmar units, remanufactured (overhauled) engines, and tested used units.
Overhaul Components: Pistons, piston rings, cylinder liners, and main/connecting rod bearings.
Gasket Sets: Full engine overhaul kits, including the multi-layer steel (MLS) head gasket.
Fuel & Cooling: Injection pumps, fuel nozzles, water pumps, thermostats, and oil coolers.
Electrical: 12V Starters, alternators, and glow plugs.
Service Support: 1-year quality warranty on new components and fast global shipping (DHL, UPS, FedEx).