Description
4D84-2A Diesel Engine Assembly Overview
The 4D84-2A Diesel Engine Assembly (OEM Part Numbers: 4D84-2A, 4D84-2, 129004-01310, YM129004-01310) manufactured by Tatan is a 1.995L 4-cylinder water-cooled engine belonging to our Diesel Engines & Engine Assemblies classification. Engineered specifically for Komatsu PC40-7, PC45-7, Kobelco SK45SR, and Takeuchi TB045 4-to-5 ton mini excavators, replacing your worn engine with a Tatan complete 4D84-2A assembly eliminates machine downtime, excessive blow-by, and severe hydraulic power loss instantly.
Built strictly according to original OEM specifications, this complete engine assembly comes pre-assembled with injection pump, injectors, starter motor, and alternator, ensuring 100% direct bolt-on fitment with hydraulic pump couplings and mounting brackets.
Key Attributes & Technical Parameters
| Product Category | Diesel Engines & Assemblies | Warranty | 1 Year / 12 Months |
| Specific Engine Model | 4D84-2A / 4D84-2 Diesel Engine | Brand Name | Tatan |
| Compatible Equipment | Komatsu PC40/PC45 | Kobelco SK45 | OEM Part Number | 4D84-2A / 129004-01310 |
| Engine Displacement | 1.995 Liters (1995 cc / 2.0L) | Cylinder Arrangement | 4 Cylinders Inline (I-4) 4-Stroke |
| Horsepower & RPM | 25-35 kW (33.5-47 HP) @ 2200-2800 | Cooling System | Water-Cooled / Liquid Cooled |
| Machinery Test Report | Provided (100% Dyno Tested) | Video Outgoing-Inspection | Provided Before Shipping |
| Aspiration Type | Naturally Aspirated (NA) | Place of Origin | Guangdong, China |
| Quality Status | 100% Brand New Engine | Packaging | Export Wooden Box Packaging |
Supported Machinery Brands & Engine Parts Coverage
In addition to Komatsu and Yanmar, Tatan manufactures replacement complete diesel engines and overhaul components for leading machinery brands:
Application Scenarios & Buyer Value
| Application Scenario | Value Delivered to Buyer |
|---|---|
| Komatsu PC40 / PC45 Engine Replacement | Complete engine swap cuts machine repair downtime by up to 70% compared to internal rebuilding. |
| Excavator Overhaul Workshops | Eliminates tedious line-boring, sleeve honing, and crank fitting; saves mechanic labor hours. |
| Engine Distributors & Stockists | Popular 2.0L mini excavator engine ready for immediate resale to plant hire fleets and repair networks. |
| Rental Fleet Maintenance | Extends 4-to-5 ton excavator working lifespan and restores full digging hydraulic power under load. |
4D84-2A Engine OEM Diagnostic & Troubleshooting Guide
Use this OEM manual diagnostic guide to troubleshoot operational engine symptoms on your 4-to-5 ton excavator:
| Engine Symptom | Technical Cause Analysis | Tatan Factory-Grade Solution |
|---|---|---|
| 1. Hard cold starting & dense white smoke | Low compression (<2.8 MPa) in cylinders due to worn piston rings, liner wear, or glow plug circuit fault. | Replace with Tatan complete 4D84-2A engine assembly or inspect glow plug system & compression pressure. |
| 2. High engine oil consumption & crankcase blow-by | Scored cylinder liners, stuck oil rings, or valve stem seal wear allowing engine oil into combustion chambers. | Install Tatan new 4D84-2A complete engine; flush engine oil gallery and replace oil filter. |
| 3. Engine overheating under high hydraulic load | Water pump impeller erosion, clogged radiator core, or blown cylinder head gasket leaking gas into cooling jacket. | Inspect thermostat opening temp (71°C/82°C), flush cooling system, or swap to a new 4D84-2A complete engine. |
| 4. Engine knocking noise & black smoke under load | Mechanical fuel injection pump timing out of calibration or worn injection nozzles causing incomplete combustion. | Calibrate injection pump timing or install Tatan brand new 4D84-2A engine assembly. |
Transport Packaging & Fast Global Shipping
To ensure 100% damage-free international transport, every Tatan 4D84-2A engine assembly undergoes anti-rust oiling, waterproof plastic sealing, and solid export wooden box packaging.
✈️ Express Air Courier
Partnered with DHL, FedEx, UPS, and TNT for express door-to-door delivery worldwide.
🚢 Sea Cargo Freight
LCL and FCL ocean container shipping for heavy engine assemblies and bulk orders.
📦 Export Wooden Cases
Fumigated solid wooden boxes with thick shockproof foam lining for maximum safety.
Quality Control & International Certificates
Tatan diesel engines are manufactured under ISO 9001 quality management systems and strictly comply with CE safety standards.
4D84-2A Engine FAQ & Related Spare Parts
* Note: Wholesale Reference Price Starts From $300.00. Please contact Gavin for a final customized quote.
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