When one drive belt of a drive belt set breaks, what is the criterion for replacement?
a new belt would be longer than the old belts and would not be subjected to any appreciable load, therefore all the belts should be replaced
a new belt would be shorter than the old belts and would be subjected to the entire load, therefore all the belts should be replaced
by adjusting the pulley, it is possible to even the belt tensions even if only one belt is replaced
for reasons of maintenance economy it is recommended to replace only the broken belt
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