Front Idler Description
This Front Idler is indexed for Komatsu Fit For Komatsu Excavator: PC50FR-1, PC50FR-2, PC40FR-2. Compare reference number YM772124-37100 against the label on your existing Komatsu component before ordering.
Before checkout, compare OEM part number YM772124-37100, connector layout, mounting position, and machine serial number. For high-value or fitment-sensitive parts, submit the fitment form below so support can verify the match.




