Flat Idler Pulley, 3-9/16"X3/8"

Flat Idler Pulley, 3-9/16"X3/8"

The 280-107 Flat Idler Pulley is a 3-9/16" metal flat idler designed to keep belt systems running smoothly by maintaining proper tension and tracking. Made by an OEM supplier, it’s a reliable replacement option across a wide range of mower and equipment brands—because belts are happiest when they’re guided, not left to “figure it out.”

Country of Origin
Varies by production batch

Key Features / Specifications

• Part Number: 280-107
• Description: Stens Flat Idler
• Product Type: Flat idler pulley
• Material: Metal
• Outside Diameter (OD): 3-9/16 in
• Bore / ID: 3/8 in
• Made By: An OEM supplier
• Note: Color may vary
• Fits Models: Gravely Pro 150 series
• Dimensions (per drawing letters):
  • A: 3-9/16 in
  • B: 3-1/4 in
  • C: 3/8 in
  • D: 1 in
  • E: 5/8 in
  • F: 5/8 in
  • H: 1/16 in
  • Height: 1-3/16 in
  • V: 1-3/16 in
• Replaces / Interchanges (OEM):
  • John Deere: AM103480 (also AM103287, AM108923, AM37321)
  • Allis Chalmers: 1685144, 2087950
  • AYP: 9292H, 9492H
  • MTD: 137505
  • Murray: 13469, 32971, 46476, 46476MA, 6205
  • Simplicity: 164268, 164268SM, 1685144, 1685144SM
  • Toro: 43-1040

Ideal For

• Replacing worn or noisy idlers to restore belt alignment and tension
• Equipment needing a 3-9/16" OD x 3/8" ID flat idler pulley
• John Deere applications using AM103480 and related cross-references
• Routine maintenance where a fresh idler prevents belt wear (and saves you from belt tantrums later)