12. Belt tension must now be checked and if necessary corrected. Remember, if it is necessary
to change belt tension, the belt alignment must be maintained.
Diagram 5.3 - Drive Unit
13. Place a belt gauge (McMaster-Carr 6160K12 or Grainger 3HX33) in the middle of the step
up belt at the center of the belt span (see Diagram 5.4). Lay a straight edge along the length
of the belt and beside the belt gauge. Slide one of the o-rings up against the shoulder of the
belt gauge. Press downward on the belt gauge, causing the belt to deflect. Read the
deflection on the belt gauge at the edge of the straight edge. Deflect the belt 1/4”. Read the
tension across the top edge of the o-ring. If the belt is correctly tensioned the gauge will
read between 14 and 16 pounds.
14. If the tension in step 14 is correct skip to step 18. Otherwise continue with the next step.
Input
Belt
Step Up
Belt
Tensioner
Input Belt
Step Up Belt
Tension Bolt
Input Belt
Tension Bolt
Adjustment
Slot
Idler Pulley
Mounting Bolt
Summary of Contents for EFX EFX 5.23
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