OEM-specification Komatsu Hydraulic Component. Part number 4s8909. Compatible with D9G, D9H; Engine: D353C, D379, D379A, D379B, D398, D398A, D398B, D399, D9G, D9H, G353D, G379, G398, G399.
Always verify with serial number before ordering.
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Flush hydraulic lines before fitting new components. Use only manufacturer-specified hydraulic fluid. Check O-rings and backup rings for correct orientation. Bleed air from system after installation.
Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.