close

North-America

Belt inspection

Belts are subject to constant flexing and are directly exposed to environmental contaminants such as dust, dirt and large temperature differentials in the engine compartment. Due to age and wear belts should be inspected every 60,000 miles and replaced every 90,000 miles, or as recommended by the vehicle manufacturer.

Automotive belt maintenance and replacement

Automotive belt maintenance and replacement

OR

Ask your local technician to inspect your belts

Utilize the resources below to inspect your belts

Mulit V-belts and Components Training Manual

Multi V-belts and Components Training Manual

Download Now

Belt wear measurement video

Troubleshooting

Pronounced wear of ribs or flanks

Pronounced wear of ribs or flanks

Cause

  • Pulleys, idlers or accessory units defective or tight
  • Belt pulleys not aligned
  • High level of slip
  • Pulley profile worn
  • Severe belt vibrations

Solution

  • Change defective parts and belt
  • Align pulleys and idlers and change if necessary. Change belt
  • Check belt length, change belt, set correct tension
  • Change pulleys and belt
  • Check OAP, TVD and tensioner and change, if necessary. Change belt

Uneven rib wear

Cause

  • Belt pulleys not aligned
  • Severe belt vibrations

Solution

  • Align misaligned pulleys and idlers or change, if necessary. Change belt
  • Check OAP, TVD and tensioner and change, if necessary. Change belt
a
b

Edge formation on ribs (a) and abrasive material in ribs (b)

Cause

  • Belt pulleys not aligned
  • OAP or TVD defective
  • Belt was laterally offset when mounting on ribbed pulleys

Solution

  • Belt pulleys not aligned
  • ➁ OAP or TVD defective
  • Belt was laterally offset when mounting on ribbed pulleys

Rib material cracks and breaks off

Cause

  • Belt tension too low or too high
  • Lifetime exceeded
  • Belt gets too hot

Solution

  • Change belt, set correct tension
  • Change belt
  • Remedy cause (e.g. engine temperature too high, check fan function, tight ancillary components), change belt

Damage to ribs

Cause

  • Foreign objects in belt drive

Solution

  • Check all components for damage, clean or change, if necessary; change belt, remove foreign objects

Detached ribs

Cause

  • Alignment fault as a result of offset mounting of belt on ribbed pulleys
  • Belt pulleys not aligned
  • As a result of severe vibration belt jumps to offset position
  • Foreign objects (small stones) in belt pulley

Solution

  • Change belt, ensure correct positioning of belt
  • Align misaligned pulleys and idlers or change, if necessary. Change belt
  • Check function of OAP, TVD and tensioner, change if necessary. Change belt
  • Remove foreign objects, change belt pulley, if necessary. Change belt

Tension member torn out of belt back or flank

Cause

  • Alignment fault as a result of offset mounting of belt on ribbed pulleys
  • Belt runs against solid edge at side
  • Pretension too high

Solution

  • Change belt, ensure correct positioning of belt
  • Check belt can run unhindered, align misaligned pulleys and idlers and change, if necessary. Change belt
  • Change belt, set correct tension

Damage to back

Cause

  • Reverse idler defective or tight
  • Idler outer ring damaged by foreign objects
  • Idler outer ring forms edge because of wear

Solution

  • Change reverse idler, change belt
  • Check drive for foreign objects, change idler, change belt
  • Change idler, change belt

Belt failure caused by chemical effect of service materials

Cause

  • Bubbling of elastomer compound and decomposition of vulcanization

Solution

  • Repair leaks in engine or engine compartment (e.g. leaks of oil, fuel, coolant etc.), clean pulleys, change belt
keyboard_arrow_up