Karcepts KPS0X - Manual (Page 10)

5. TENSIONING THE BELT (continued…)
4.
If not using a belt tension gauge, a good rule of thumb is to apply 20lbs. of force
in between the idler and alternator pulley. In doing so, the measured horizontal
deflection of the belt should be approximately ¼”.
5.
After belt tension is set appropriately, you may now torque down the button head
socket cap screws. Torque both bolts to no more than 15 ft-lbs (180 in-lbs).
6. Once the tensioner block has been locked into place, the adjustment bolt will
now be relieved of its tension. Because of this, you will want to tighten the
adjustment bolt ¼ turn (90 deg) more in order to secure it in place.