Problem – Diagnosis – Solution: V-Belts

Building on Experience

V-belt checklist
Tension Tensioning system?
Belt sidewall wear Pulley alignment/pulley bearing?
Incipient tears/chunking Foreign object?
Aging?
Contamination Leaks from engine system components?
Operating noise Tension?
Pulley alignment?
Contamination?

 

V-Belts
Problems and probable causes Solutions
Hardened, polished sidewalls  
Incorrect pretension Replace belt, set correct tension
Tensile member of the belt damaged by improper installation Replace belt and install correctly
Uneven profile wear  
Pulley misalignment Check the drive, align pulleys, replace them if necessary, replace belt
Severe belt vibration Check tension, tighten or replace belt if necessary
Belt noise during operation  
Insufficient tension Tighten or replace belt
Service life exceeded Replace belt
Chipping and chunking in base/body rubber  
Insufficient/excessive belt tension Replace belt, set correct tension
Service life exceeded Replace belt
Foreign bodies Replace belt
Belt tears after short period of operation  
Tensile member damaged due to improper installation Replace belt and install correctly
Excessive tension Replace belt, set correct tension
Contamination of the belt  
Leak from engine or in engine compartment (e.g. leaking oil, antifreeze, etc.) Repair leak, replace belt
Hardened, polished sidewalls (different belt tensions for a belt set)  
Pulley misalignment Check the drive, align pulleys properly and install new set of belts
Tensile member damaged due to improper installation Replace belt and install correctly
Incorrect composition of set Always replace entire set of belts
Severe belt sidewall wear/flanks embrittled  
Excessive slip Replace belt, set correct tension
Pulley misalignment Check the drive, align pulleys or replace if necessary
Erosion of pulley grooves Align or replace pulleys, replace belt
Problem – Diagnosis – Solution: V-Belts