Finding a reliable 6745-31-2111 (also searched as 6745312111) piston is critical for maintaining the compression and power output of your heavy machinery. As a professional engine parts supplier, we provide OEM standard replacement pistons specifically engineered for the Komatsu 6D107 / SAA6D107E-1 series. Whether you are performing a mid-life overhaul or a complete engine rebuild, our precision-machined pistons ensure a perfect fit and long-term durability in demanding work environments.
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| Field Name | Details | Field Name | Details |
|---|---|---|---|
| Model NO. | 6D107 / SAA6D107E-1 | Part Number | 6745-31-2111 / 6745312111 |
| Product Name | Engine Piston | Type | Internal Combustion Engine Parts |
| Condition | Brand New, OEM Standard | MOQ | 1 Piece |
| Stock Status | In Stock / Fast Dispatch | Packaging | Industrial Export Packing |
| Application | Engine rebuild, overhaul | Payment | T/T, Western Union, MoneyGram |
| Delivery | Express (DHL, Fedex, EMS, UPS), Air Freight, Sea Freight | ||
The 6745-31-2111 Piston is widely used in various 6D107 series equipment. Below is the primary machine compatibility list for procurement reference:
| Serial No. | Equipment Type | Compatible Models | Engine Model |
|---|---|---|---|
| 01 | Hydraulic Excavator | PC200-8 / PC200LC-8 | SAA6D107E-1 |
| 02 | Hydraulic Excavator | PC220-8 / PC220LC-8 | SAA6D107E-1 |
| 03 | Hydraulic Excavator | PC270-8 / PC270LC-8 | SAA6D107E-1 |
| 04 | Wheel Loader | WA380-6 | SAA6D107E-1 |
| 05 | Motor Grader | GD555-5 | SAA6D107E-1 |
| 06 | Crawler Dozer | D51EX-22 / D51PX-22 | SAA6D107E-1 |
| Key Features | Our OEM Replacement | Common Aftermarket Parts |
|---|---|---|
| Material Composition | High-silicon aluminum alloy with thermal coating | Standard recycled aluminum alloy |
| Dimensional Accuracy | Micron-level precision (Exact Match) | Variable tolerances (Risk of seizing) |
| Heat Resistance | Up to 350°C sustained performance | Limited thermal expansion control |
| Piston Ring Groove | Reinforced Ni-resist insert for wear reduction | No reinforcement (Short service life) |
| Surface Treatment | Anodized crown & graphite coated skirt | Plain surface (High friction) |
| Supply Reliability | In-stock for immediate global shipping | Long lead times or drop-shipping |
Not sure how this issue affects your equipment? Our team helps operators troubleshoot engine failure symptoms related to the 6745-31-2111 piston, such as excessive blow-by, oil consumption, or cylinder knocking.
Identify potential risks during maintenance to prevent catastrophic engine failure.
Recommend suitable replacement parts based on your specific engine serial number (ESN).
Support both inspection advice and components supply for a complete 6D107 overhaul.
Typical failure signs include blue smoke from the exhaust (indicating oil burning), loss of power under load, and increased crankcase pressure. If you notice these issues, a physical inspection of the piston crown and ring grooves for carbon buildup or cracking is necessary.
While you can replace a single piston for emergency repairs, we strongly recommend replacing the full set for a 6D107 engine overhaul. This ensures balanced combustion, uniform cylinder pressure, and prevents premature wear on the crankshaft bearings.
OEM-standard tri-metal structure provides the best balance of weight and strength. These parts are Trusted by repair shops & equipment fleets worldwide for their ability to withstand high-pressure common rail (HPCR) combustion cycles.
We specialize in providing high-quality engine assemblies and components for international brands. Our inventory focuses on Cummins, Komatsu, Caterpillar, Isuzu, Kubota, Yanmar, and Weichai engines.
Our main product range includes everything required for a professional engine restoration: Cylinder Liners, Pistons, Piston Rings, Main Bearings, Con-rod Bearings, Thrust Washers, Full Overhaul Gasket Kits, Fuel Injection Pumps, Injectors, Crankshafts, Turbochargers, Water Pumps, Oil Pumps, Cylinder Blocks, Cylinder Heads, and Connecting Rods.
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