OEM-specification Komatsu Electrical Component. Part number 7861-93-3320. Compatible with D31EX, D31PX, D37EX, D37PX, D39EX, D39PX, D65EX, HM250, PC130, PC160, PC18MR, PC190, PC220, PC240, PC290, PC300, PC350, PC400, PC450, PC45MR, PC55MR, PC78US, PC88MR. Fits: PC45MR3, PC55MR3, PC20MR3, PC35MR2B, P
Always verify with serial number before ordering.
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Disconnect main battery before working on electrical components. Use dielectric grease on all connector pins. Check ground connections — most electrical faults trace to poor grounds. Test with multimeter before installing new parts.
Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.