中文
PC30-7 Mini Excavator Diesel Engine Assembly (3-Cylinder 3D84 / 3D84E-3 Complete Engine 20.6kW)
Place of Origin:China
Brand Name:HanRui
Model Number:PC30-7
Product Description
Compact Excavator Powertrain
HanRui PC30-7 Excavator Complete Diesel Engine Assembly (3D84 / 3D84E Series)
Factory-direct brand-new replacement engine engineered for 3.0-to-3.5 ton compact excavators. Built on the proven 3D84 / 3D84E-3 / 3D84N-2 3-cylinder diesel platform (Rated: 20.6 kW / 28 HP @ 2500 RPM). Delivered as a 100% turnkey drop-in package complete with fuel injection pump, starter, alternator, and manifolds for rapid zero-downtime installation.
⚙️ Engine Model: 3D84 / 3D84E-3 (3-Cylinder Diesel) ⚡ Rated Output: 20.6 kW (28 HP) @ 2500 RPM 🛡️ 100% Dynamometer Bench Tested
Wholesale Price
$2,100 – $3,800 USD/Unit
Direct factory price — complete turn-key crate engine
MOQ & Dispatch
1 Unit (In Stock)
Export wooden crate ready for air/ocean freight in 1–3 days
Quality Assurance
12 Months
Dyno run video, oil pressure & emission test verified
Engine Manufacturing Standards & Mechanical Highlights
⚙️ High-Rigidity Cast Cylinder Block
Poured with wear-resistant pearlite alloy iron to eliminate thermal bore distortion and guarantee lasting cylinder sealing under high-hour digging.
🎯 Mechanical In-Line Fuel Injection
Factory-calibrated fuel injection pump with multi-hole injectors ensures micro-droplet fuel atomization, prompt throttle response, and minimal exhaust smoke.
🚜 Turnkey Plug-and-Play Crate Package
Shipped 100% fully dressed: includes starter motor, 12V alternator, water pump, thermostat, cooling fan, fuel filter housing, and pre-balanced flywheel.
Technical Specifications & Engine Parameter Matrix
| Applicable Machine Models | PC30-7, PC30-7E, PC25-1, PC30MR-1 (3.0–3.5 Ton Mini Excavator Class) |
| Base Engine Model / Designation | 3D84 / 3D84E-3 / 3D84N-2 (Vertical 4-Stroke In-line Diesel) |
| Number of Cylinders & Valves | 3 Cylinders, 6 Valves (2 valves per cylinder) |
| Bore × Stroke | 84 mm × 90 mm |
| Total Displacement | 1.496 L (Approx. 1.5 Liters) |
| Rated Power Output | 20.6 kW (28.0 HP) @ 2,500 RPM |
| Aspiration & Cooling System | Naturally Aspirated, Pressurized Forced Water Circulation |
| Delivery Package Status | 100% Brand-New Complete Turnkey Assembly (Pre-lubricated & ready to start) |
PC30-7 Diesel Engine Troubleshooting & Field Diagnostics
Fault 1: Heavy Black Smoke & Engine RPM Drop Under Heavy Hydraulic Digging
Root Cause: Clogged air intake restriction, carbon-fouled fuel injectors, or worn injection pump plunger elements failing to deliver adequate fuel pressure under load.
Field Remedy: Inspect air filtration and injector spray patterns; replace with a brand-new HanRui 3D84 complete engine to restore full digging horsepower.
Field Remedy: Inspect air filtration and injector spray patterns; replace with a brand-new HanRui 3D84 complete engine to restore full digging horsepower.
Fault 2: Engine Hard to Start Cold with Excessive White or Blue Exhaust Smoke
Root Cause: Severe cylinder bore or piston ring clearance wear causing compression pressure loss (<2.5 MPa), allowing unburnt fuel mist and oil blow-by.
Field Remedy: Avoid expensive and unreliable field rebuilding by replacing the worn unit with a complete, dyno-tested crate engine.
Field Remedy: Avoid expensive and unreliable field rebuilding by replacing the worn unit with a complete, dyno-tested crate engine.
Fault 3: Chronic Coolant Overheating (>100°C) & Compression Bubbles in Expansion Tank
Root Cause: Blown cylinder head gasket, thermal warpage of the cylinder head, or microscopic hairline cracks in the combustion chamber bridge.
Field Remedy: Install a brand-new complete 3D84 engine assembly to eliminate recurring head gasket failures.
Field Remedy: Install a brand-new complete 3D84 engine assembly to eliminate recurring head gasket failures.
Frequently Asked Questions (FAQ)
Q: What is the exact engine model for this PC30-7 excavator?
A: The PC30-7 excavator is powered by the 3D84 / 3D84E-3 series 3-cylinder water-cooled naturally aspirated diesel engine, delivering 20.6 kW (28 HP) @ 2500 RPM.
Q: Is this a bare short block or a complete turn-key engine assembly?
A: It is a 100% complete turn-key crate engine assembly. It arrives fully equipped with cylinder block, head, fuel injection pump, fuel injectors, starter motor, 12V alternator, and water pump.
Q: How do you verify the engine before shipment?
A: Each HanRui engine undergoes an extensive dynamometer test run. We record and provide live video of starting response, stable oil pressure, coolant temperature equilibrium, and zero-smoke operation prior to dispatch.
Looking for a Replacement Engine Assembly for PC30-7?
Share your excavator serial number or current engine nameplate photo (3D84 / 3D84E) for instant compatibility confirmation, global wooden crate freight quotes, and wholesale pricing.
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