Adjusting Drive Belt and Tensioner

DRIVE BELTS TENSION ADJUSTMENT





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 for the proper belt deflection measurement.

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 center of the standard range indicated under "NEW". And then let the engine idle for 5 minutes or more, and check the standard value indicated under "Inspection".
3. When adjustment 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".
4. Refer to the standard value indicated under "Inspection" for periodic inspections.





Belt Routing

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 after removing the gauge.