Always find out the important stuff after wasting time and money on the wrong stuff. Soap seemed too good to be true, but kept the old mitsubishi. Quiet for a year before new belt, and belt sizes, got a pair for the saw bench and from the get go the inside belt looks loose, cranked the adjuster up a bit, cutting is fine and I prefer it to slip when I jam a log, but one belt must be doing the work. Thanks Paul and 600D. ....
For about three years I worked for a Company that repaired and serviced commercial and industrial air-conditioning and heating equipment. A lot of the motors ran multiple belts and we always insisted on matched sets of belts. It may have helped that we bought all our belts hundreds every month from the same industrial belt supplier. So far all my (very few) restorations have only had one belt of each size but if I do one with more, I will definately get matched belts).
I have my shoulder to the wheel,
my nose to the grindstone,
I've put my best foot forward,
I've put my back into it,
I'm gritting my teeth,
You have to be careful you dont get uneven wear in the pulley grooves ......no belt match can fix that .......the Denning bussses had a three groove pulleys on the radiator ,and one would fight the others and wear the grooves ....one belt would hang loose one side ,tight to breaking on the other .