
Product Overview
This high-performance replacement piston is engineered for Komatsu 6D125 and S6D125 series engines, specifically designed for PC400-6 and PC400-7 excavators. As a leading global supplier of heavy machinery engine parts, we ensure this component meets the rigorous demands of construction and mining operations worldwide. We specialize in direct shipping to major industrial hubs across North America, Europe, the Middle East, and the Asia-Pacific region.
Key Features & Benefits
- Precision Engineered: Manufactured to exact OEM specifications for a perfect fit and optimal compression.
- Superior Durability: Constructed from high-grade cast iron to withstand extreme temperatures and pressures within the combustion chamber.
- Enhanced Performance: Designed to restore engine power, fuel efficiency, and reduce oil consumption in Komatsu heavy equipment.
- Direct Replacement: A direct-fit, aftermarket alternative that eliminates downtime, offering significant cost savings over OEM parts.
- Global Compliance: Produced in facilities adhering to international quality standards, suitable for export to all major markets.
Technical Specifications
| Specification | Detail |
|---|---|
| Our Part Number | 6152-32-2510 |
| OEM Part Number | 6152-32-2510 |
| Alternative Part Number | 6151-31-2511 |
| Engine Model | Komatsu 6D125, S6D125 |
| Piston Height | 117.4 mm |
| Piston Diameter / Spec | 63.3 mm (Refer to specific engine serial for exact bore size) |
| Material | High-Strength Cast Iron |
| Application | Combustion Piston Assembly |
OEM Cross-Reference
This piston is a direct cross-reference for the following OEM part numbers:
- Komatsu: 6152-32-2510
- Komatsu (Alternate): 6151-31-2511
Note: Always verify the part number from your original component or service manual before ordering.
Compatibility
This piston is compatible with the following Komatsu equipment models equipped with the 6D125 or S6D125 engine:
- Excavators: Komatsu PC400-6, Komatsu PC400-7
- Primary Engine: Komatsu 6D125, Komatsu S6D125
Typical model years for this application range from the late 1990s to the mid-2000s. Compatibility is determined by engine serial number; please confirm your engine model for assurance.
Global Supply & Distribution
We are a certified international exporter with a streamlined logistics network. Our capabilities include:
- Worldwide Shipping: Reliable delivery via air and sea freight to any port or airport.
- Key Markets Served: We regularly supply distributors and workshops in North America (USA, Canada, Mexico), the European Union, the United Kingdom, Australia, the Middle East (UAE, Saudi Arabia), and Southeast Asia.
- Fast Delivery: Consolidated shipments to major industrial centers and ports ensure reduced lead times.
- Export Expertise: All documentation, including commercial invoices, packing lists, and certificates of origin, is provided for smooth customs clearance in your country.
Quality Assurance
Every piston undergoes stringent quality control to guarantee performance and longevity.
- Manufacturing Standards: Produced using advanced casting and machining processes that meet or exceed ISO quality benchmarks.
- Rigorous Testing: Components are subject to dimensional checks, material hardness testing, and visual inspections to ensure defect-free delivery.
- Warranty: Backed by a comprehensive 12-month warranty against manufacturing defects, providing peace of mind for your business.
FAQ
Q1: Is this piston sold as a single unit or as a set?
A1: This listing is for a single piston. For a complete engine overhaul, a full set matching your cylinder count is required. Please contact us for set pricing and availability.
Q2: Do I need to order piston rings separately?
A2: Yes, this listing is for the piston body only. Piston rings, pins, and clips are typically sold separately. We offer compatible ring sets; please inquire for the correct kit for your engine’s bore size.
Q3: How do I ensure this part fits my specific Komatsu PC400 excavator?
A3: The most reliable method is to cross-reference the part number stamped on your original piston or listed in your official Komatsu service manual. Providing your machine’s model, serial number, and engine serial number allows us to confirm 100% compatibility before shipment.
Our advantages

1.An authorized wholesaler of Isuzu genuine parts, Hino genuine parts, Mitsubishi genuine parts and Mahle parts.
2. We are not only supply genuine parts, but also high quality OEM parts, which are made in China or made in Japan.
3. More than 10 years of experience in machinery parts, professional supply of diesel engine parts.
4. Fast delivery, the fastest can be shipped in one day ,more than 500,000 of different types parts in stock.
5. Scientific ERP system, easy and fast to locate the parts that customer needs.
6. Professional technician checks the parts before delivery, to make sure the parts are correct, usable and defect-free.
Exhibition

Packing&Shipping

1. Our shipment is by air/sea/express (DHL/FEDEX/TNT/UPS/EMS).
2. Once we get confirmation of payment, we will ship products in 2 days.
3. Our packaging is standard export wooden box or others as your requirement.
4. We’ll check and test the products before shipping , and givethe pictures to our customers to confirm.

FAQ
Q1. What is your company major products?
A: Our main products are Liner kit, Piston, Rings, Liner, Gasket kit, Bearing, Injection pump, Nozzle, Water pump, Oil pump,Crankshaft, Turbocharger,Filter, etc.
Q2.What is the MOQ?
A: Normally we can supply any quantity if we have in stock.
Q3. What is your payment term ?
A: We accept Western Union, T/T, Paypal.
Q4. What is the packing ?
A: Carton or wooden case , If you want to put your logo on the packing , We will do it after get your authorization letter.
Q5. When can you deliver products after payment ?
A: By Express ,usually might take 3-4 days ;By Air , Usually take 7-9 days ; By Sea ,usually take 1-2 months .
Q6. What can you do to complete order perfectly ?
A: In the beginning , We will communicate with clients in details to understand what they need .
Before packing , We will check the products and send photos to clients .After confirmation ,
We will packing products well to avoid damage . Once we get tracking number ,
We will send it to customer and keep contact in with clients .