Adjusting Drive Belt Tension

ADJUSTING DRIVE BELTS TENSION





1. Check that the belts are not damaged and are properly fit into the pulley grooves.

CAUTION:
1 When installing the V-ribbed belt, check that the V-ribs are properly in alignment.
2 If noise or slippage is detected, check the belt for wear, damage, or breakage on the pulley contact surface, and check the pulley for scoring. Also check the degree that the belt is deflected.





2. Apply 100 N (22 lbs.) force to the belt back midway between the pulleys as shown in the illustration, measure the amount of deflection with a tension gauge.





Standard value

NOTE:
1 The belt tension must be measured between the specified pulleys.
2 When a new belt is installed, adjust the tension to the central value of the standard range Indicated under "New" in the above table. And then let the engine idle for 5 minutes or more, and check the standard value indicated under "Inspection".
3 When adjusting a belt which has been used or a belt newly installed after 5 minutes or more of operation, refer to the standard value indicated under "Used" in the above table.
4 Refer to the standard value indicated under "Inspection" for periodic inspections.





Type A tension gauge
Do not let the dial section of the tension gauge contact other objects during measurement.





Type B tension gauge
1. When measuring, be sure to turn reset button in the arrow direction to set the gauge needle to the RESET position.
2. If the tension gauge is removed from the belt, the needle will still indicate the tension. Read the tension value after removing the gauge.