Dayco 5100615 Serpentine Belt

Serpentine Belt

Fits: 90-96 Ford LA9000, 90-91 Ford LN9000, 90-91 Ford LNT9000, 93 Ford LLA9000, 95 Ford LLS9000, 95 Ford LTLA9000, 00 Mack LE, 04-06 Mack CV

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The Dayco® Poly Rib® Belt is designed for power transmission on heavy duty multiple-accessory drives. This Poly Rib belt is the latest version of the revolutionary multi-ribbed belt first developed by Dayco® for the 1979 Ford® Mustang®. The Dayco® Poly Rib® Belt is manufactured from an extreme temperature EPDM rubber and features a construction that uses a highly fiber loaded compound to maximize belt life and load carrying requirements while minimizing pulley misalignment noise. This belt offers excellent resistance to high under hood temperatures and ozone contamination. In addition, specially formulated treated cord insures length and tension stability on heavy duty diesel engine drives for the life of the belt. The Dayco® Poly Rib® Belt meets or exceeds SAE J1459 and SAE J2432 specifications.

BRAND: Dayco




Cross SectionK-Section
Effective Length61.50
Effective Length1562.10
MaterialEPDM, Aramid Reinforced
Maximum Operating Temperature212
Maximum Operating Temperature100
Minimum Operating Temperature-45
Minimum Operating Temperature-42.7
Outside Circumference1578.87
Outside Circumference62.16
Rib DepthStandard
Rib ProfileStraight Rib
StandardsSAE J1459, SAE J2432
Top Width1.38



  • Mack: 20870709
  • Mack: 88GB458P615
  • NAPA: 25-100618HD
  • Cummins: 8L-27-130
  • Mack: 88GB447P615
  • ACDelco: K100615HD
  • Mack: 88GB449P615
  • Gates: K100615HD
  • NAPA: 25-100618
  • NAPA: 25-100615HD
  • Goodyear: 4100615
  • CARQUEST: K100615HD


  • 1995-1995 Ford LLS9000 - Position: Fan
    • 10 Rib Belt
  • 1990-1991 Ford LNT9000 - Position: Fan
  • 1993-1993 Ford LLA9000 - Position: Fan
    • 10 Rib Belt
  • 1995-1995 Ford LA9000 - Position: Fan
    • 10 Rib Belt
  • 1995-1995 Ford LTLA9000 - Position: Fan
    • 10 Rib Belt
  • 1990-1991 Ford LN9000 - Position: Fan
  • 1994-1994 Ford LA9000 - Position: Fan
  • 1996-1996 Ford LA9000 - Position: Fan
  • 2006-2006 Mack CV - Position: Fan
    • 61 1/2 In. Belt
  • 1990-1993 Ford LA9000 - Position: Fan
    • Serpentine Belt
  • 2004-2005 Mack CV - Position: Fan and Alternator
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