The cylinder head with reference number 3977221 is designed for Cummins QSB6.7 / Komatsu 6D107 6.7L turbocharged diesel engines. This heavy-duty cast iron component delivers reliable performance for Komatsu PC200-8, PC220-8 excavators, wheel loaders, and industrial power applications.

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Quick Specifications:

• Part Number: 3977221 / 397-7221 (Cummins OEM format)
• Engine: Cummins QSB6.7 / Komatsu SAA6D107E-1 / 6D107
• Displacement: 6.7 L (409 cu in)
• Configuration: Inline-6, 4 valves per cylinder
• Fuel System: Common Rail Direct Injection
• Material: Cast Iron
• Weight: ~75 kg (165 lbs)

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Applications:

• Komatsu PC200-8 / PC220-8 / PC240-8 Excavators
• Komatsu WA250-8 / WA320-8 Wheel Loaders
• Komatsu D61EX / D65EX Bulldozers
• Industrial generator sets (80-150 kVA range)
• Agricultural machinery & material handling equipment
• Marine auxiliary power units