Drive Belt: Testing and Inspection

AP13.22-P-1352EW Check Visible Area of Poly-V Belt For Wear
ENGINE 157, 276, 278, 642, 651 in MODEL 166
ENGINE 271, 272, 273, 276, 278, 642, 651 in MODEL 207
ENGINE 156, 157, 271, 272, 273, 276, 278, 642, 651 in MODEL 212
ENGINE 157, 276, 278, 642, 651 in MODEL 218
ENGINE 276, 278 in MODEL 231





1 Poly-V-belt





Damage profiles

A New poly-V
B Wear to flanks: Poly-V are pointed (new: trapezoidal)
C Tensile cord in poly-V belt visible (bright points)
D Transverse cracks on the cover plate
E Poly-V released from base of the poly-V belt (arrow)
F Fraying of outer cords
G Cord torn out at the side
H Transverse cracks in several poly-V
J Poly-V fractures
K Single poly-V transverse cracks
L Dirt or stones embedded in ribs
M Rubber lumps in base of poly-V belt