Komatsu Heavy Equipment Compressor 421-07-31221

Komatsu Heavy Equipment Compressor 421-07-31221 is part of the 19PARTS KOM line, developed for demanding heavy-equipment service where dependable fit, durability, and day-to-day uptime matter. This compressor is manufactured in Italy in an ISO-certified facility with more than 50 years of production experience and is backed by our Keep Ops Moving™ commitment.

Why buyers choose the 19PARTS KOM line

• Manufactured in Italy for heavy-equipment applications
• Produced in an ISO-certified facility with more than 50 years of manufacturing experience
• Built for dependable performance in Komatsu assemblies
• Supported by 19PARTS and our Keep Ops Moving™ commitment

Fitment hint from source data

Source usage data links this part to Wheel Loader, Dump Truck, Dozer applications. Common machine models include: HM300, HM350, D275AX, D475A, D475ASD, D65EX, D65PX, D65WX, D85EX, D85PX, WA380, WA400, WA430, WA470. Reported category/application areas: DUMP TRUCKS, BULLDOZERS, WHEEL LOADERS. Reported serial ranges include: 1001-UP, 30001-30209 (ECOT3), 30001-UP (MINING SPEC., TIER2), 30001-UP (TIER 2), 30001-UP (SUPER DOZER SPEC.), 69001-UP (ECOT3), 10001-UP (LANDFILL SPEC.), 10001-UP.

Part information

• Komatsu part number: 421-07-31221
• Alternate search number: 4210731221
• Product type: Compressor
• Usage-report description: COMPRESSOR ASS'Y, COMPRESSOR ASSEMBLY

Fitment and verification

Use the model-specific hubs and diagram callouts on our site to verify the correct Komatsu part number, callout location, and serial-range fitment before ordering. The hubs provide the machine-specific authority, while this product page focuses on quality, sourcing, and buying confidence.

Brand and quality

The 19PARTS KOM line is built around practical uptime: quality-focused Komatsu replacement parts, transparent identification, and support for customers who need to keep machines working. For part number 421-07-31221, rely on 19PARTS to help you Keep Ops Moving™.