Dayco – PV Belt Diagnostics
PV belt: Broken Ribs
Causes:
- Progression of cracks
- Presence of foreign matter in the pulley groove
- Incorrect assembly, ribs outside the pulley
- misalignment, ribs untracking
Actions:
- Check the correct installation of the belt, the absence of foreign matter in the pulley grooves and the correct operation of all the transmission components
- Replace the damaged belt
PV belt: Loose resistant insert
Causes:
- Excessive working tension
- Irregularities in the pulleys that may cause abrasions or cuts to the belt
- Faulty pulleys
- Misaligned pulleys
- Interference with a fixed component
Actions:
- Make sure the transmission rigid components are in good condition and are correctly operating and aligned, and that the belt is correctly tensioned
- Replace the damaged belt
PV belt: Deposit of external material in the belt grooves
Causes:
- Deposit of external material in the belt grooves- Material detached from the ribs and deposited at the bottom of the grooves
- Penetration of foreign material between the belt and the pulley groove causing vibrations or excessive noise
Actions:
- Make sure the transmission rigid components do not show obvious signs of wear and that the belt tension is that prescribed by the manufacturer
- Inspect the transmission components and make sure there is no material deposited in the pulley grooves: dirt or grit… that may compromise their correct operation
- Replace the damaged belt
PV belt: Separation of the rib compound
Causes:
- Use of unsuitable tools for the belt installation on the pulleys
- Misalignment between the transmission components
- Incorrect positioning of the belt on the pulleys
Actions:
- During assembly, carefully check the belt positioning in the transmission and make sure the transmission rigid components are correctly secured and aligned
- Replace the damaged belt
PV belt: Reduced rib section
Causes:
- Low assembly tension
- Excessively worn pulley grooves
- Incorrect choice of belt for the application (excessive length)
Actions:
- Make sure the belt is suitable for the application
- Make sure the transmission rigid components do not show obvious signs of wear and that the belt tension is that prescribed by the manufacturer
- Replace the damaged belt
