OEM-specification Komatsu Engine Component. Part number 120-22-31221-120-22-31231. Compatible with Komatsu D31A 17 D31A 20 D31E 17 D31E 20 D31P 17 D31P 18 D31P 20 D40A 3 D40A 5 D41S 3.
Always verify with serial number before ordering.
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Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.
Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.