Description
4D84-2A YM129004-01310 Engine Assembly Overview
The 4D84-2A YM129004-01310 Engine Assembly manufactured by Tatan is a 1.995L 4-cylinder naturally aspirated water-cooled diesel engine belonging to our Diesel Engine Assembly classification. Engineered specifically for Komatsu PC40-7, PC40-7R, and PC45-7 4.0-to-4.5 ton mini excavators, replacing your worn engine with a Tatan complete assembly eliminates machine downtime, excessive blow-by, and severe hydraulic power loss instantly.
Built strictly according to original Yanmar/Komatsu OEM specifications, this complete engine assembly comes pre-assembled with direct injection pump, fuel injectors, starter motor, and alternator, ensuring 100% direct bolt-on fitment with hydraulic pump couplings and engine mount brackets.
Key Attributes & Parameters for 4D84-2A YM129004-01310 Engine Assembly
| Product Category | Diesel Engine Assembly | Warranty | 1 Year / 12 Months |
| Specific Engine Model | Komatsu 4D84-2A / Yanmar 4TNE84 Engine | Brand Name | Tatan |
| Compatible Equipment | Komatsu PC40-7 | PC45-7 Mini Excavator | OEM Part Number | 4D84-2A / YM129004-01310 |
| Engine Displacement | 1.995 Liters (1995 cc / 2.0L) | Cylinder Arrangement | 4 Cylinders Inline (I-4) 4-Stroke |
| Horsepower & RPM | 25.0-35.0 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
When replacing your mini excavator engine with our 4D84-2A YM129004-01310 Engine Assembly, buyers achieve maximum operational uptime and power efficiency:
| Application Scenario | Value Delivered to Buyer |
|---|---|
| Komatsu PC40-7 Engine Swap | 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 | High-demand 2.0L mini excavator engine ready for immediate resale to plant hire fleets and repair networks. |
| Rental Fleet Maintenance | Extends 4-ton mini excavator working lifespan and restores full digging hydraulic torque under load. |
4D84-2A YM129004-01310 Engine Assembly OEM Diagnostic Guide
Use this OEM manual diagnostic guide to troubleshoot operational engine symptoms on your Komatsu PC40-7 mini excavator:
| Engine Symptom | Technical Cause Analysis | Tatan Factory-Grade Solution |
|---|---|---|
| 1. Hard cold starting & dense white smoke | Mechanical injection pump timing retarded or low compression (<2.8 MPa) in 4 cylinders due to piston ring wear. | Adjust injection pump timing or replace with Tatan complete 4D84-2A engine assembly. |
| 2. Severe power loss & black smoke under hydraulic load | Fuel injection pump governor spring fatigue or clogged mechanical fuel injectors causing incomplete combustion. | Inspect fuel injection pressure or swap to a Tatan factory pre-tested 4D84-2A complete engine. |
| 3. High engine oil consumption & heavy crankcase blow-by | Scored 2.0L 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. |
| 4. Engine overheating & coolant surge into expansion tank | Water pump impeller erosion, clogged radiator core, or cylinder head gasket leaking combustion gas into cooling jacket. | Replace thermostat (82°C), flush cooling system, or swap to a new 4D84-2A complete engine assembly. |
Transport Packaging & Fast Global Shipping
To ensure 100% damage-free international transport, every Tatan 4D84-2A YM129004-01310 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 YM129004-01310 Engine FAQ & Related Categories
* Note: Wholesale Reference Price Starts From $300.00. Please contact Gavin for a final customized quote.
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