How to diy ac belt

[CTScott]

There are tools called belt tension gauges. They are either generic ones that measure torque in ft lbs or in lbs or they are manufacturer specific ones. The mfg specific ones are calibrated for a specific amount of force. You press the spring loaded gauge against the belt and read the scale.

I personally don't own one. For something like the spec above, I press against the center of the belt span with one finger and look for about that much deflection.