King Industrial KC-60FX Instruction Manual page 23

ADJUST THE V-BELT TENSION
1. The correct belt tension can be identified by pressing the belt with your finger using
normal pressure. The belt should yield 1/2'' when pressed.
2. When belt tension adjustment is necessary, loosen the four lock nuts on the dust chute.
Move the motor vertically until proper tension is obtained.
3. Tighten the four lock nuts after the belt tension has been adjusted.
1/2''
MOTOR
PULLEY