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Shop By Brand

The Following brands are available based on your search.

  • Dayco
    Dayco
  • Gates
    Gates

Best Selling Genuine Western Star Belt Idler Pulleys

  • We Stock the following top leading brands, including Dayco, Gates
  • Constantly Updated Inventory of Western Star Replacement Belt Idler Pulley Parts

We stock Belt Idler Pulley parts for most Western Star models, including 4800, 4900EX, 4900FA, 4900SA, 6900XD.

Dayco
Qty:
$29.34
Dayco Drive Belt Idler Pulley  Main Drive
  • Smooth
  • Product Attributes:
    • :
      • 39.25
      • 74
    • Bearing Inner Diameter 1: 17
    • Bearing Inner Diameter 2: 17
    • Bearing Width: 24
    • Belt Type: Serpentine
    • Flat: Y
    • Material: Steel
    • Max Belt Width: 08 Rib
    • Number of Bearings: 2
Brand: Dayco
Additional Fitment Information:
Vehicle Block CC CID Position
2005 - Western Star 4900FA L 14640 893 Main Drive
Dayco
Qty:
$20.61
Dayco Drive Belt Idler Pulley
  • Product Attributes:
    • :
      • 30
      • 70
    • Bearing Inner Diameter 1: 17
    • Bearing Inner Diameter 2: 17
    • Bearing Width: 24
    • Belt Type: Serpentine
    • Flat: Y
    • Material: Steel
    • Max Belt Width: 06 Rib
    • Number of Bearings: 2
  • Suggested Purchase Quantity: 2
    • Most jobs typically require 2 of this item.
Brand: Dayco
Additional Fitment Information:
Vehicle Block CC CID
2011 - Western Star 4900SA L 12816 781
Dayco
Qty:
$41.64
Dayco Drive Belt Idler Pulley  Fan and Water Pump
  • Product Attributes:
    • :
      • 39.4
      • 86.5
    • Bearing Inner Diameter 1: 17
    • Bearing Inner Diameter 2: 17
    • Bearing Width: 24
    • Belt Type: Serpentine
    • Flat: Y
    • Material: Steel
    • Max Belt Width: 08 Rib
    • Number of Bearings: 2
Brand: Dayco
Additional Fitment Information:
Vehicle Block CC CID Position
2002 - Western Star 4900SA L 15000 915 Fan and Water Pump
Dayco
Qty:
$63.04
Dayco Drive Belt Idler Pulley  Main Drive
  • Grooved
  • Product Attributes:
    • :
      • 37.5
      • 74
    • Bearing Inner Diameter 1: 17
    • Bearing Inner Diameter 2: 17
    • Bearing Width: 28
    • Belt Type: Serpentine
    • Flat: N
    • Groove Quantity: 8
    • Material: Steel
    • Max Belt Width: 08 Rib
    • Number of Bearings: 2
Brand: Dayco
Additional Fitment Information:
Vehicle Block CC CID Position
2005 - Western Star 4900FA L 14640 893 Main Drive
Gates
Qty:
$61.65
Gates Drive Belt Idler Pulley  Grooved Pulley
  • DriveAlign® Idler Pulleys
  • DriveAlign Premium OE Pulley
Brand: Gates
Additional Fitment Information:
Vehicle Block CC CID Fuel Type Position
2007 - Western Star 4900EX L 14640 893 DIESEL Grooved Pulley
Gates
Qty:
$59.95
Gates Drive Belt Idler Pulley  Smooth Pulley
  • DriveAlign® Idler Pulleys
  • DriveAlign Premium OE Pulley
Brand: Gates
Additional Fitment Information:
Vehicle Block CC CID Fuel Type Position
2007 - Western Star 4900SA - - 763 DIESEL Smooth Pulley
Gates
Qty:
$26.27
Gates Drive Belt Idler Pulley  Smooth Pulley
  • DriveAlign® Idler Pulleys
  • DriveAlign Premium OE Pulley
Brand: Gates
Additional Fitment Information:
Vehicle Block CC CID Fuel Type Position
2007 - Western Star 4900EX L 14640 893 DIESEL Smooth Pulley
Gates
Qty:
$37.45
Gates Drive Belt Idler Pulley  Alternator (Upper)
  • DriveAlign® Idler Pulleys
  • DriveAlign Premium OE Pulley
Brand: Gates
Additional Fitment Information:
Vehicle Block CC CID Fuel Type Position
2009 - Western Star 4900SA L 14640 893 DIESEL Alternator (Upper)
Gates
Qty:
$37.45
Gates Drive Belt Idler Pulley  Alternator (Lower)
  • DriveAlign® Idler Pulleys
  • DriveAlign Premium OE Pulley
Brand: Gates
Additional Fitment Information:
Vehicle Block CC CID Fuel Type Position
2009 - Western Star 4900SA L 14640 893 DIESEL Alternator (Lower)
Gates
Qty:
$36.84
Gates Drive Belt Idler Pulley  Air Conditioning (Lower)
  • DriveAlign® Idler Pulleys
  • DriveAlign Premium OE Pulley
Brand: Gates
Additional Fitment Information:
Vehicle Block CC CID Fuel Type Position
2009 - Western Star 4900SA L 14640 893 DIESEL Air Conditioning (Lower)
Gates
Qty:
$33.80
Gates Drive Belt Idler Pulley  Alternator and Air Conditioning
  • DriveAlign® Idler Pulleys
  • DriveAlign Premium OE Pulley
Brand: Gates
Additional Fitment Information:
Vehicle Block CC CID Fuel Type Position
2015 - Western Star 4900EX L 15000 915 DIESEL Alternator and Air Conditioning
Gates
Qty:
$26.27
Gates Drive Belt Idler Pulley
  • DriveAlign® Idler Pulleys
  • DriveAlign Premium OE Pulley
Brand: Gates
Additional Fitment Information:
Vehicle Block CC CID Fuel Type
1997 - Western Star 4800 L 10309 629 DIESEL
Gates
Qty:
$37.45
Gates Drive Belt Idler Pulley  Air Conditioning (Upper)
  • DriveAlign® Idler Pulleys
  • DriveAlign Premium OE Pulley
Brand: Gates
Additional Fitment Information:
Vehicle Block CC CID Fuel Type Position
2009 - Western Star 4900FA L 14640 893 DIESEL Air Conditioning (Upper)
Gates
Qty:
$37.45
Gates Drive Belt Idler Pulley  Air Conditioning (Lower)
  • DriveAlign® Idler Pulleys
  • DriveAlign Premium OE Pulley
Brand: Gates
Additional Fitment Information:
Vehicle Block CC CID Fuel Type Position
2009 - Western Star 4900FA L 14640 893 DIESEL Air Conditioning (Lower)
Gates
Qty:
$36.84
Gates Drive Belt Idler Pulley  Alternator (Lower)
  • DriveAlign® Idler Pulleys
  • DriveAlign Premium OE Pulley
Brand: Gates
Additional Fitment Information:
Vehicle Block CC CID Fuel Type Position
2009 - Western Star 4900FA L 14640 893 DIESEL Alternator (Lower)
Gates
Qty:
$43.30
Gates Drive Belt Idler Pulley  Air Conditioning (Upper)
  • DriveAlign® Idler Pulleys
  • DriveAlign Premium OE Pulley
Brand: Gates
Additional Fitment Information:
Vehicle Block CC CID Fuel Type Position
2009 - Western Star 4900SA L 14640 893 DIESEL Air Conditioning (Upper)
Gates
Qty:
$59.95
Gates Drive Belt Idler Pulley  Accessory Drive
  • DriveAlign® Idler Pulleys
  • Smooth Pulley
  • DriveAlign Premium OE Pulley
Brand: Gates
Additional Fitment Information:
Vehicle Block CC CID Fuel Type Position
2004 - Western Star 4900SA - - 763 DIESEL Accessory Drive
Gates
Qty:
$61.65
Gates Drive Belt Idler Pulley  Accessory Drive
  • DriveAlign® Idler Pulleys
  • Grooved Pulley
  • DriveAlign Premium OE Pulley
Brand: Gates
Additional Fitment Information:
Vehicle Block CC CID Fuel Type Position
2004 - Western Star 4900SA - - 763 DIESEL Accessory Drive