Posted by Steve@Advance on December 18, 2017 at 12:08:41 from (24.182.105.179):
In Reply to: measuring a pulley posted by 37chief on December 18, 2017 at 11:25:02:
Belt configuration can be tricky.
First, you'll need to determine the cross section needed. Some pulleys will have the size and cross section on the pulley.
Look at the wear pattern on the pulley. It should not be worn shiny to the bottom of the groove, nor should the sides be worn uneven. If the belt has been slipping or the wrong belt run for a long time, the pulleys may need to be replaced.
Once the correct cross section is determined, depending on the complexity of the belt route, you can try to figure the length mathematically, if a simple configuration, or base a starting point by wrapping a "close to right" belt around, marking the length, measuring the result.
As for the tensioner, if spring loaded, take the spring off, position the idler where you would like it to run, get the measurement.
If an eccentric tensioner, start with it about 1/3 of the way to the tight position, take a measurement there.
Mowers are known for being hard on belts. Once you find the correct size, try to find a Kevlar belt, much better quality.
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