Field Remedy: 1463

Remedy:

Excessive drive noise from toothed belt drive (picture I)

Problem and cause:                         Remedy:

Side tension too high                      Adjust to correct tension                              
     - belt whines / squeals 

Side tension too low                       Adjust to correct tension
     -belt strikes against cover

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Excessive adge wear (picture II)

Problem and cause:                         Remedy:

Belt not running parallel to axis          Align correctly
and impacting against flanged pulley                                        

Deflective flanged pulley                  Replace sprocket

Gearwheel misalign                         Align correctly
     - belt cannot run true 

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Excessive fabric wear at base (picture III)

Problem and cause:                         Remedy:

Side tension too high                      Adjust to correct tension

Belt operating in excessive  heat          Identify problem and recify

Worn sprocket                              Replace sprocket

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Tooth flank wear / roof fractores and tooth shear (picture IV)

Problem and cause:                         Remedy:

Side tension too high / low, leading       Adjust to correct tension
to incorrect pitch ratios

Belt does not comply with permissible      Replace sprocket
length tolerance

Action of external media(e.g. oil)         Identify problem and recify

Sprocket / pulley jammed                   Identify problem and recify

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Separation of teeth and fabric from belt body (tension member) (picture V)

Problem and cause:                         Remedy:

Fabric damaged during installation         Fit new belts carefully

Action of external media                   Check cover if seated properly

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Damage on pulley side of belt (picture VI)

Problem and cause:                         Remedy:

Foreign object caught in belt drive        Remove foreign object, check 
                                           cover if seated properly

Damage to gearwheel teeth caused by        Replace sprocket
foreign object or installation tool

Belt damaged prior to / during             Ensure proper installation
installation

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Cracks in backing (picture VII)

Problem and cause:                         Remedy:

Exposure to excessive heat                 Identify problem and recify

Exposure to excessive low temperature      Identify problem and recify

Action of external media                   Check cover if seated proberly

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Tearing of the belt (picture VIII)

Problem and cause:                          Remedy:

Foreign object caught in drive              Check cover if seated properly

Action of external media                    Check cover if seated properly

Initial tension too high                    Adjust to correct tension 

Belt crimped prior to / during              Observe handling instruction
installation

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Fault system component (picture IX)

Problem and cause:                          Remedy:

Bearing play                                Substitute idler pulley, tension 
                                            coil and/or guide roller 

Damaged bearing surface                     Substitute idler pulley, tension 
                                            coil and/or guide roller

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Fracture on fixing spot tension coil-oil pump (1,4 - 2.2 litre engines)
(picture X)

Problem and cause:                          Remedy:

Wrong torque of tension coil on             Replace oil pump
fixing spot of oil pump

Important:

     - check the oil pump on each toothed belt check or each replace
     interval and each toothed belt damage for cracks (arrows).