08, 9900I, Cat engine. We have replaced the AC, All pulleys & tensioner's replaced. Set laser level on pulleys. After 1200 miles shredding belt on back side. We also has crank shimmed before. On 10th belt replacement. Any thoughts? Thank You
all i can think of is...something isn't lined up still.
are those pulleys grooved as to take a ribbed fan belt? (serpentine belt)
if so, it only takes on pulley to be out of whack, or not having the same number of grooves as the rest.
if you do not have grooved/ribbed pulleys, then the fan belt must be not the correct type, and is riding most likely too high in the pulley...where are you getting the belts from?
do not forget one thing, american made belts are to our standard measuring system..belts made in other countries, are sometimes using the metric or imperial standards for measuring....making them either too wide, or too narrow to properly fit either the grooved/ribbed pulleys, or the V type of pulleys