Drive Belt: Testing and Inspection

AP13.22-P-1352V Check Visible Area of Poly-V Belt For Wear
ENGINE 156, 157, 273, 278 in MODEL 216
ENGINE 156, 157, 272, 273, 276, 278 in MODEL 221





1 Poly-V-belt





Damage diagram

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