OEM / REF: 21W-03-42121SKU: pilotpart240372
Hydraulic Oil Cooler 21W-03-42121 For Komatsu Excavator PC78US-6 is a Hydraulic Oil Cooler replacement part indexed for Komatsu PC78US-6 and Komatsu Komatsu Excavator PC78US-6. Match OEM part number 21W-03-42121 and confirm fitment for Komatsu HVAC Parts before ordering.
This Hydraulic Oil Cooler is indexed for Komatsu PC78US-6; Komatsu Komatsu Excavator PC78US-6. Compare reference number 21W-03-42121 against the label on your existing Komatsu component before ordering.
Additional cross references on file: 42121. If your machine plate shows a different number, submit a fitment inquiry with photos before checkout.
| Core Dimensions (mm) | 500*490*52 |
|---|---|
| Part Number | 21W-03-42121, 21W0342121 |
Match the OEM or reference number first, then verify machine model, engine model, serial number, connector layout, mounting points, and old part photos.
Yes. Send the old part number, machine plate, and photos through the fitment inquiry form. Support can review possible replacements or alternatives.
Products are indexed as replacement parts unless explicitly marked otherwise. Always compare reference numbers and confirm fitment before purchase.
