Home Products OEM Replacement Parts Komatsu PC650-3 PC750-5 6D140 SA6D140 Piston 6212-31-2170 6211-31-2130 Engine Parts

OEM Replacement Parts

Komatsu PC650-3 PC750-5 6D140 SA6D140 Piston 6212-31-2170 6211-31-2130 Engine Parts

MOQ: 1pcs Price: Negotiable

Part No.: 6212-31-2170 / 6211-31-2130
Engine Model: 6D140, SA6D140-1, SA12V140-1
Material: Aluminum Alloy (High-Silicon)
Category: OEM Replacement Parts

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Product Details

6d140 Sa6d140-1 Sa12v140-1 Piston 6212-31-2170 6211-31-2130 For Komatsu Pc650-3 Pc650-5 Pc750-5 Pc1600-1 Engine Spare Parts

Product Overview

This high-quality engine piston assembly is designed for Komatsu heavy-duty excavators equipped with the 6D140, SA6D140-1, and SA12V140-1 diesel engines. Precision-engineered to meet or exceed OEM specifications, this piston (OEM ref: 6212-31-2170 / 6211-31-2130) is a critical component for maintaining compression, power output, and fuel efficiency. We provide global shipping solutions to construction, mining, and industrial markets across North America, Europe, the Middle East, and Asia-Pacific, ensuring fast and reliable delivery to major ports and logistics centers.

Key Features & Benefits

High-Strength Alloy Construction: Manufactured from durable aluminum alloy with reinforced crown for exceptional resistance to thermal stress and mechanical fatigue.
Precision Tolerances: CNC-machined to exacting standards for optimal cylinder sealing, reducing blow-by and improving engine efficiency.
Advanced Ring Groove Design: Hard anodized top ring groove extends service life and reduces wear under high-load conditions.
Direct OEM Replacement: Engineered for seamless fitment into SA6D140-1 and SA12V140-1 engine blocks without modifications.
Enhanced Oil Control: Optimized skirt profile and oil ring design minimize friction and reduce oil consumption.

Technical Specifications

Parameter	Specification
Part Number	6212-31-2170 / 6211-31-2130
Engine Model	6D140, SA6D140-1, SA12V140-1
Material	Aluminum Alloy (High-Silicon)
Ring Grooves	3 Grooves (1 Compression, 1 Scraper, 1 Oil Control)
Pin Bore Diameter	Standard (as per OEM)
Compression Height	Standard OEM Dimensions
Surface Treatment	Tin-Plated Skirt / Hard Anodized Top Groove

OEM Cross-Reference

This piston is a direct replacement for the following original equipment manufacturer (OEM) part numbers:

Komatsu OEM: 6212-31-2170, 6211-31-2130
Komatsu Engine: 6D140, SA6D140-1, SA12V140-1

Please verify your existing part number before ordering. This part is not a genuine Komatsu product but is manufactured to OEM specifications as a high-quality aftermarket alternative.

Compatibility

This piston assembly is compatible with the following Komatsu excavator models and engines:

Excavator Models: Komatsu PC650-3, PC650-5, PC750-5, PC1600-1
Engine Applications: 6D140 (6-cylinder), SA6D140-1 (6-cylinder turbo), SA12V140-1 (12-cylinder turbo)
Industry Use: Heavy construction, mining, quarry, and large-scale earthmoving equipment.

Global Supply & Distribution

We specialize in the international supply of heavy-duty engine components. Our logistics network supports:

Worldwide Shipping: Reliable delivery via air freight, sea freight, and express courier (DHL, FedEx, UPS).
Major Markets Served: North America (US, Canada, Mexico), Europe (Germany, France, UK, Netherlands, Russia), Middle East (UAE, Saudi Arabia, Qatar), Africa (South Africa, Nigeria, Ghana), Asia-Pacific (Australia, Indonesia, Singapore, China).
Fast Delivery: Stock items dispatched within 24-48 hours to major industrial hubs and ports.
Trade Compliance: Experienced in international export documentation and customs clearance.

Quality Assurance

Manufacturing Standards: Produced under strict ISO 9001 quality management systems.
Testing: Each piston undergoes dimensional inspection, material hardness testing, and visual quality control.
Warranty: Backed by a standard 12-month warranty against manufacturing defects (terms apply).

FAQ

Q1: Is this piston a direct fit for my Komatsu PC750-5 with an SA6D140 engine?

Yes, this part (6212-31-2170 / 6211-31-2130) is specifically designed as a direct replacement for the SA6D140-1 engine used in the PC750-5. It matches OEM dimensions and pin fitment. We recommend verifying your engine serial number and the existing part number for absolute confirmation.

Q2: Do I need to replace piston rings and liners at the same time?

For optimal performance and longevity, we strongly recommend replacing the piston rings and cylinder liners simultaneously. Worn liners can compromise the new piston’s seal, leading to premature failure. We offer matching ring and liner sets for the SA6D140-1 engine.

Q3: What is the recommended break-in procedure after installing new pistons?

After installation, perform a low-load break-in cycle for approximately 50-100 hours. Avoid sustained high RPMs or maximum load during this period. Monitor engine temperature and oil pressure closely. After break-in, change the engine oil and filter to remove any initial wear particles. Always follow the Komatsu service manual for detailed specifications.