This part is commonly Used on models:
147-5037 Torsion Idler Kit, GrandStand Mower With 52in TURBO FORCE Cutting Unit
72531 GrandStand Multi Force Mower, With 52in TURBO FORCE Cutting Unit
72530 GrandStand Multi Force Mower, With 52in TURBO FORCE Cutting Unit and Low Flow Hydraulics
72505 GrandStand Mower, With 52in TURBO FORCE Cutting Unit
72507 GrandStand Mower, HD 52in TURBO FORCE Cutting Unit
72519 GrandStand Mower, With 52in TURBO FORCE Cutting Unit