OEM Replacement Parts
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This is a premium quality, aftermarket replacement piston specifically designed for Komatsu S4D95 and S4D95L diesel engines. Manufactured to strict OE specifications, this piston (Part No. 6204-31-2121) is a critical component for restoring engine compression and performance in Komatsu excavators like the PC60-7 and PC75. We supply this high-demand engine part globally to markets in North America, Europe, Asia-Pacific, the Middle East, and South America, ensuring fast and reliable delivery for your heavy equipment maintenance needs.
| Specification | Detail |
|---|---|
| Part Number | 6204-31-2121 |
| Alternative Part Number | 6204-31-2120 |
| Engine Model | Komatsu S4D95, S4D95L |
| Diameter | 94mm (Standard) |
| Material | High-Strength Aluminum Alloy |
| Application | Excavator Engine Spare Parts |
| Type | Aftermarket Replacement |
This piston is a direct replacement for the following OEM part numbers:
This piston is specifically designed for use in the following engine models and applications:
We are a dedicated supplier of heavy machinery engine parts with a robust global logistics network. We offer:
We are committed to providing parts that meet or exceed OEM standards. Our quality assurance includes:
Q: Is this piston a direct fit for my Komatsu PC60-7 excavator?
A: Yes, this 94mm piston (Part #6204-31-2121) is a direct replacement for the original piston in the Komatsu S4D95 engine, which is the primary engine used in the PC60-7 model. We recommend confirming your engine model is S4D95 or S4D95L before purchase.
Q: What is the recommended installation procedure for this piston?
A: Professional installation is strongly recommended. The piston rings should be carefully installed using a ring expander, with gaps staggered at 120 degrees. The piston must be properly lubricated with engine oil before insertion into the cylinder liner. Always use a new piston pin and retaining clips.
Q: Does this piston come with piston rings and a pin?
A: This product listing is for the piston only. For a complete overhaul kit, we recommend purchasing the piston ring set and piston pin separately to ensure all components are new and properly matched.
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.
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.
A: Our main products are Liner kit, Piston, Rings, Liner, Gasket kit, Bearing, Injection pump, Nozzle, Water pump, Oil pump,Crankshaft, Turbocharger,Filter, etc.
A: Normally we can supply any quantity if we have in stock.
A: We accept Western Union, T/T, Paypal.
A: Carton or wooden case , If you want to put your logo on the packing , We will do it after get your authorization letter.
A: By Express ,usually might take 3-4 days ;By Air , Usually take 7-9 days ; By Sea ,usually take 1-2 months .
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 .
