Drive Belt: Adjustments
ADJUSTING DRIVE BELT TENSION1. Check that the belts are not damaged and are properly fit for the pulley grooves.
2. Apply 100 N (22 lbs.) force to the back and midway portion of the belt between the pulleys as shown in the illustration, measure the amount of deflection with a tension gauge.
CAUTION:
1. When installing the V-ribbed belt, check that the V-ribs are properly aligned.
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 amount that the belt is deflected.
STANDARD VALUE TABLE
NOTE:
1. The belt tension must be measured halfway 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. 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 newly installed, after 5 minutes or more of operation, refer to the standard value indicated under "Used" in the above table.
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, turn the reset button in the direction of the arrow and 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.
ADJUSTING THE ALTERNATOR BELT
CAUTION: If the belt is too loose, it will cause noise or sudden wear.
If the belt is too tight, the engine coolant pump bearing or the alternator can get damaged.
1. Loosen the alternator nut "A" and the tension adjuster lock bolt "B".
2. Using the tension adjuster bolt, adjust the belt tension to the specification.
3. Tighten the adjuster lock bolt "B".
4. Tighten the alternator nut "A".
5. Check the tension or the deflection of belt, readjust if necessary.
Tightening torque
Alternator support bolt and nut: 20 - 25 Nm (200 - 250 kg.cm, 14 - 18 ft. lbs.)
Alternator lock bolt B: 12 - 15 Nm (120 - 150 kg.cm, 9 - 11 ft. lbs.)
Alternator brace mounting bolt: 20 - 27 Nm (200 - 270 kg.cm, 15 - 20 ft. lbs.)