Ok folks,
I've got a problem! I have a motorhome that keeps burning up altenator belts. They only last about 100 miles. I thought I had found the problem/problems. First someone else had rebuilt the motor when my parent had the motorhome. The fuel line had been run between the alt bracket and the belt, and secured with a hose clamp. I thought the clamp was cutting the belt when it was wobbling. Then when the Secondary batteries were installed it was asking at times for maximum amperage. So I disconnected them. Also the spacing was not correct on the pulley alignment. I got the alignment corrected. BUT, it is still burning belts, the tension should be right and the alt has been replace with one that rotates freely. Help!!!!
TIA
Bob Tilley
Albany, Ga
It may be the case that the alternator as installed is of a higher output than the one that came on the chassis the motor home is built on. So, let us suppose that it is the case, and now the single sheave pulley is no longer adequate, and a two sheave pulley is required. Also, it is possible that the layout does not provide as much wrap (contact area) for the belt(s) as is required and is just overheating them.
So, add a sheave, and increase the pulley size about 30% for more wrap and lower belt stress (bending angle) and tensile load. No more problems.
Lynn E. Hanover
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