Description
C4.2 284-8250 Engine Assembly Overview
The C4.2 284-8250 Engine Assembly manufactured by Tatan is a 4.249L 4-cylinder direct-injection turbocharged water-cooled diesel powerplant belonging to our Diesel Engine Assembly classification. Engineered specifically for Caterpillar 312D, 312D L, 313D, 314D CR, and 311D LRR 12-14 ton hydraulic excavators, swapping your fatigued powerplant with this complete C4.2 284-8250 Engine Assembly unit eliminates costly jobsite downtime, common rail fuel pressure leakage, and engine limp-mode power derating under heavy trenching operations.
Built strictly according to original Caterpillar OEM specifications, this complete engine assembly is pre-fitted with an electronic common rail fuel system, electronic direct injectors, wastegate turbocharger, 24V starter motor, and 50A alternator, ensuring 100% direct mechanical and electrical alignment with Cat main hydraulic pump dampener couplings and machine wiring harnesses.
Key Attributes & Parameters for C4.2 284-8250 Engine Assembly
| Product Category | Diesel Engine Assembly | Warranty | 1 Year / 12 Months |
| Specific Engine Model | Cat C4.2 / C4.2 ACERT Turbo Diesel Engine | Brand Name | Tatan |
| Compatible Equipment | Caterpillar 312D | 312D L | 313D | 314D CR | OEM Part Number | C4.2 / 284-8250 / 292-3780 |
| Engine Displacement | 4.249 Liters (4249 cc / 4.25L) | Cylinder Arrangement | 4 Cylinders Inline (I-4) 4-Stroke |
| Horsepower & RPM | 72 kW (97 HP) @ 2000 RPM (Max Torque 420 N·m) | Cooling System | Heavy-Duty Water-Cooled / Liquid Cooled |
| Machinery Test Report | Provided (100% Dyno Tested under Load) | Video Outgoing-Inspection | Provided Before Shipping |
| Fuel Delivery System | Electronic High-Pressure Common Rail (HPCR) | Place of Origin | Guangdong, China |
| Quality Status | 100% Brand New Engine Assembly | Packaging | Export Reinforced Wooden Box Packaging |
Supported Machinery Brands & Engine Coverage
In addition to Caterpillar, Tatan manufactures replacement complete diesel engines and overhaul components for leading machinery brands:
Application Scenarios & Buyer Value
When rebuilding or replacing aging powerplants with our C4.2 284-8250 Engine Assembly, workshops and equipment owners eliminate repetitive downtime:
| Application Scenario | Value Delivered to Buyer |
|---|---|
| Cat 312D Engine Replacement | Swapping to the C4.2 284-8250 Engine Assembly cuts machine repair downtime by up to 75% compared to complex electronic injector and block overhauls in the field. |
| Excavator Rebuild Centers | Avoids the high cost and unreliability of repairing scored 4-cylinder crank journals and troubleshooting intermittent common rail pressure DTC errors. |
| Municipal & Civil Contractors | Restores full 72 kW power and 420 N·m high-torque responsiveness, driving dual main hydraulic pumps simultaneously without engine lugging down under 0.65 m³ bucket bites. |
| International Machinery Stockists | Ready-to-ship electronic replacement engine inventory for overseas contractors maintaining working fleets of classic Cat medium excavators. |
C4.2 284-8250 Engine Assembly OEM Diagnostic Guide
Use this technical diagnostic guide to identify electronic engine failures on your Caterpillar 312D excavator:
| Common Rail Engine Symptom | Technical Cause Analysis | Tatan Factory-Grade Solution |
|---|---|---|
| 1. Hard starting when hot & common rail pressure drop | Excessive fuel return leakage across worn electronic injector command valves or sticking suction control valve (SCV) failing to maintain fuel rail pressure. | Replace with a complete factory-tested C4.2 284-8250 Engine Assembly pre-fitted with calibrated injectors. |
| 2. Engine derates into limp mode with boost code under digging | Sticking electronic turbocharger wastegate linkage, cracked charge-air intercooler hose, or clogged intake manifold air pressure sensor port. | Inspect boost pressure sensor, clean air circuit, or swap to a factory pre-tested replacement engine assembly. |
| 3. High engine oil consumption & blue exhaust smoke | Scored 102 mm cylinder liners, stuck piston oil control rings, or worn valve stem oil seals allowing oil into combustion chambers. | Install a brand new engine assembly; flush oil cooler lines and replace oil filter cartridges. |
| 4. Engine overheating & expansion tank bubbling under load | Eroded water pump impeller, clogged radiator core tubes, or multi-layer steel (MLS) head gasket combustion breach into the liquid cooling jacket. | Replace thermostat (82°C), flush cooling system lines, or install a brand new replacement engine assembly. |
Transport Packaging & Fast Global Shipping
To ensure 100% damage-free international transport, every Tatan C4.2 engine assembly is preserved with anti-corrosion fluid, sealed in heavy poly film, and strapped inside an export-grade reinforced wooden crate.
✈️ Express Air Courier
Partnered with DHL, FedEx, UPS, and TNT for 3-7 day express door-to-door delivery worldwide.
🚢 Sea Cargo Freight
LCL and FCL ocean container shipping for heavy 4.25L engine assemblies and bulk fleet orders.
📦 Export Wooden Cases
Fumigated solid wooden boxes with custom high-density foam inserts to prevent shipping shock.
Quality Control & International Certificates
Tatan hydraulic and engine components are manufactured under ISO 9001 certified quality control systems and strictly comply with CE industrial safety directives.
C4.2 284-8250 Engine Assembly FAQ & Related Categories
* Note: Wholesale Reference Price Starts From $300.00. Please contact Gavin for a final customized quote.
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