Air Compressor Assy 20Y-979-6121 for Komatsu PC300 PC125 Diesel Engine Parts

Product Details

Product Overview

This is a high-quality Air Compressor Assembly, identified by OEM part number 20Y-979-6121, designed for use in Komatsu heavy machinery. This critical component is responsible for supplying compressed air to the braking system and other pneumatic accessories, ensuring safe and reliable operation of the equipment.

Commonly applied to the Komatsu PC300 and PC125 series excavators, this air compressor is a direct replacement part built to meet OEM specifications. It is a key part for maintaining the performance of your diesel engine’s auxiliary systems.

Key Features & Benefits

• OEM Standard Fitment: Manufactured to the exact dimensions and specifications of the genuine Komatsu 20Y-979-6121 part, ensuring a direct bolt-on fit without modifications.
• Reliable Air Supply: Delivers consistent and adequate air pressure to support braking systems, clutches, and other pneumatic controls on your excavator.
• Durable Construction: Built with high-grade materials to withstand the high pressures and harsh operating environments typical of construction and mining sites.
• Enhanced Safety: A properly functioning air compressor is critical for the safe operation of air-over-hydraulic brake systems, reducing the risk of brake failure.
• Cost-Effective Solution: Offers a high-quality aftermarket alternative to the more expensive OEM Komatsu part, providing significant savings without sacrificing performance.

Technical Specifications

OEM Cross-Reference

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

• 20Y-979-6121

Please verify your existing part number to ensure compatibility before ordering. If your part number is not listed, please contact our sales team with your machine’s serial number for verification.

Compatibility

This Air Compressor Assembly is commonly used for the following Komatsu machinery:

• Excavators: Komatsu PC300 Series, Komatsu PC125 Series

Note: This part is designed for diesel engines. It is always recommended to consult your machine’s service manual or a qualified technician to confirm fitment for your specific model and serial number.

Global Supply & Distribution

We are a global supplier of high-quality engine parts for construction and industrial machinery. Our distribution network ensures fast and reliable delivery to major markets worldwide, including:

• North America: USA, Canada, Mexico
• Europe: UK, Germany, France, Netherlands, Poland
• Asia-Pacific: Australia, Japan, Singapore, South Korea
• Middle East & Africa: UAE, Saudi Arabia, South Africa
• South America: Brazil, Chile, Peru

We offer flexible shipping options via sea, air, and express courier (DHL, FedEx, UPS) to meet your project deadlines. Our export team is experienced in international trade compliance and documentation.

Quality Assurance

We prioritize quality to ensure your equipment operates reliably. Every Air Compressor Assembly undergoes rigorous inspection:

• Testing: Each unit is pressure and performance tested before shipment. A Machinery Test Report and Video Outgoing Inspection are available upon request.
• Manufacturing Standards: Produced in ISO-certified facilities in Guangdong, China, using high-quality materials and precision machining.
• Warranty: Backed by a 6-month warranty against manufacturing defects, giving you peace of mind for your purchase.

FAQ

Q: How can I be sure this Air Compressor Assembly (20Y-979-6121) will fit my Komatsu PC300?
A: This part is designed as a direct OEM replacement for the 20Y-979-6121 part number. It is commonly used on PC300 and PC125 series excavators. For 100% certainty, we recommend comparing your old part’s physical dimensions and bolt pattern with the specifications listed above, or contacting us with your machine’s serial number for cross-verification.

Q: What are common signs that my air compressor needs replacement?
A: Key indicators include: a persistent low air pressure warning light on your dashboard, the air system taking too long to build pressure, unusual noises (knocking or hissing) from the compressor area, or visible oil leaks around the compressor unit. If you experience any of these, it is advisable to inspect the compressor immediately.

Q: Is this a complete assembly ready to install?
A: Yes, this is a complete Air Compressor Assembly. However, we recommend that installation be performed by a qualified heavy equipment mechanic. You may also need to replace the gasket and check the drive coupling condition during installation for optimal performance. Always follow the official Komatsu service manual for your specific model.