Komatsu S4D95 S4D95L Excavator Piston 94mm | 6204-31-2121 for PC60-7 PC75 Engine Parts

Product Details

Product Overview

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.

Key Features & Benefits

• Precision Engineering: Machined to a precise 94mm diameter for an exact fit and optimal cylinder wall clearance.
• Superior Durability: Constructed from high-strength aluminum alloy, capable of withstanding extreme combustion pressures and temperatures.
• Enhanced Performance: Designed to restore original engine power, reduce oil consumption, and minimize blow-by.
• Wear-Resistant Design: Features a reinforced crown and precisely grooved ring lands for extended service life.
• Cost-Effective Solution: Offers a reliable, high-quality alternative to the OEM part, providing significant cost savings without compromising quality.

Technical Specifications

OEM Cross-Reference

This piston is a direct replacement for the following OEM part numbers:

• 6204-31-2121 (Komatsu Original)
• 6204-31-2120 (Previous Version / Alternative)

Compatibility

This piston is specifically designed for use in the following engine models and applications:

• Engine Models: Komatsu S4D95, S4D95L
• Excavator Models: Komatsu PC60-7, PC75
• Other Applications: May also be compatible with other Komatsu machinery utilizing the S4D95 engine series. Please verify your engine model before purchasing.

Global Supply & Distribution

We are a dedicated supplier of heavy machinery engine parts with a robust global logistics network. We offer:

• Worldwide Shipping: Reliable shipping to all major ports and industrial centers worldwide.
• Major Markets Served: North America, Europe (EU), Southeast Asia, Middle East (UAE, Saudi Arabia), Africa, and Oceania.
• Fast Delivery: Efficient order processing and dispatch to minimize your machine downtime.
• Trade Compliance: Experienced in international export documentation and customs clearance.

Quality Assurance

We are committed to providing parts that meet or exceed OEM standards. Our quality assurance includes:

• Manufacturing Standards: Produced in ISO 9001 certified facilities.
• Material Testing: Raw materials are tested for hardness and composition.
• Dimensional Accuracy: Each piston is inspected for precise diameter, pin bore, and ring groove dimensions.
• Warranty: Comes with a standard 12-month warranty against manufacturing defects.

FAQ

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.