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Cummins 4991240 Accessory Drive Belt Idler Pulley, Grooved
Mfr #: 4991240BB #: cummins-4991240-cummins-4991240-accessory-drive-belt-idler-pulley-gro
Last verified Oct 2, 2026 — price check expired
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🗎 Product description from the manufacturer spec sheet
Genuine Cummins accessory drive belt idler pulley 4991240, a grooved pulley that keeps the accessory drive belt aligned and on its proper path, reducing belt wear and the effects of vibration and friction. Fits a wide range of Cummins B-series and ISB/QSB/ISC/QSC engines. Crosses to Dayco 89103, Gates 36093, Bando 580140 and Continental 49113.
▦ Specifications spec-checked before it ships
- Part Type
- Accessory drive belt idler pulley
- Pulley Type
- Grooved
- Engines
- Cummins B4.5, ISB6.7, QSB6.7, ISC8.3, QSC8.3 and related B-series
⌗ Cross-references every known SKU, MFR & MPN
MPN4991240