OEM / REF: 397-9979SKU: pilotpart438143
Turbo TD04L4 Turbocharger 397-9979 For Caterpillar CAT 257D3 257D 259D 277D 287D 289D 279D 289D3 259D3 279D3 is a Belt Tensioner replacement part indexed for Caterpillar AP300 and Caterpillar AP300F, with 3 application records on file. Match OEM part number 397-9979 and confirm fitment for Caterpillar Engine Spare P...
This Belt Tensioner is indexed for Caterpillar AP300; Caterpillar AP300F; Caterpillar AP355; Caterpillar AP355F. Compare reference number 397-9979 against the label on your existing Caterpillar component before ordering.
Before checkout, compare OEM part number 397-9979, 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.
| Turbo Model | TD04L4 |
|---|---|
| Part Number | 397-9979 |
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.
