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Komatsu SAA6D125E-2 Engine Assembly 6D125 Diesel Engine Complete Motor for PC400-6 PC400-7 Excavator WA470 Loader Aftermarket Replacement
Welcome to our heavy machinery engine supply center. We specialize in providing the complete SAA6D125E-2 / 6D125E diesel engine assembly, precision-manufactured as a heavy-duty aftermarket replacement engine compatible with Komatsu large excavators, wheel loaders, and mining equipment. Built to deliver maximum horsepower, high fuel efficiency, and continuous heavy-load torque, this complete engine motor ensures maximum Uptime on job sites.
Key Technical Specifications & Parameters
- Engine Model: SAA6D125E-2 / SA6D125E-2 / 6D125 Series
- Applicable Machine Models: Fit for Komatsu PC400-6, PC400LC-6, PC400-7, PC450-6, PC450-7 Excavators, WA470-3, WA470-5 Loaders
- Engine Configuration: 11.04 Liters, Inline 6-Cylinder, 4-Stroke, Direct Injection Diesel
- Aspiration: Turbocharged and Air-to-Air Aftercooled
- Included Sub-Assemblies: Cylinder block, cylinder head, crankshaft, pistons, fuel injection system, turbocharger, water pump, oil pump & starter motor
- Condition & Quality Testing: 100% Brand New Aftermarket / Remanufactured, 100% Dynamometer (Dyno) Load Tested
Komatsu SAA6D125E-2 Engine Common Faults & Solutions
Severe working conditions cause engine wear over time. Replacing your aged or damaged engine with our complete SAA6D125E-2 diesel engine assembly resolves these critical operational failures:
1. Engine Overheating & High Coolant Temp (发动机高温)
Cause: Clogged cylinder water passages, cracked cylinder head, or worn water pump impellers.
Fix: Replacing with a complete new engine restores proper cooling circulation and thermal stability.
2. Black Smoke & Heavy Power Loss (冒黑烟/动力不足)
Cause: Worn fuel injectors, low compression from worn piston rings, or turbocharger failure.
Fix: Complete assembly restores original combustion efficiency, full horsepower, and clean emissions.
3. Abnormal Knocking Noise & Bearing Wear (引擎异响/敲缸)
Cause: Worn crankshaft bearings, damaged connecting rod bushings, or excessive piston skirt clearance.
Fix: Installing a brand-new dyno-tested motor eliminates engine knock and prevents catastrophic engine lockup.
4. Low Oil Pressure & Severe Oil Leaks (机油压力低/漏油)
Cause: Worn main bearings, damaged oil pump gears, or aged front/rear crankshaft seals.
Fix: Precision-machined oil passages and new seal kits guarantee stable oil pressure under full loads.
5. Hard Starting & Cylinder Misfire (启动困难/缺缸抖动)
Cause: Low compression in cylinders or faulty fuel injection timing pump.
Fix: Pre-calibrated injection pump and brand-new valves ensure instant start-up and smooth multi-cylinder firing.
Application Scenarios & Jobsite Suitability
Engineered for high-intensity 40-ton excavator and wheel loader applications, the SAA6D125E-2 engine motor performs in:
- Heavy Mining & Open-Cast Quarrying: Provides high torque at low RPMs for continuous rock digging.
- Massive Earthmoving & Highway Infrastructure: High fuel efficiency for long continuous operational shifts.
- Aggressive Heavy Loading: Powerful throttle response suited for large wheel loaders like WA470.
Frequently Asked Questions (FAQ)
Q: Where can I buy a complete replacement engine assembly compatible with Komatsu SAA6D125E-2?
A: You can purchase high-quality complete SAA6D125E-2 diesel engine assemblies directly from us. We supply fully assembled, dyno-tested ready-to-install motors for Komatsu excavators and loaders.
Q: Is the SAA6D125E-2 engine interchangeable with the SAA6D125E-3 on Komatsu PC400-7?
A: Both belong to the Komatsu 125 series. While dimensions are identical, minor differences exist in turbocharging and fuel system configurations. Contact us with your machine serial number for exact verification.
Q: Are your SAA6D125E-2 engines tested before shipment?
A: Yes, every complete engine unit undergoes a 100% dynamometer (dyno) run-in test to check oil pressure, coolant temperature, boost pressure, and horsepower before packaging.
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