Drive Belts (For the Generator and Power Steering Pump) (Check)

DRIVE BELTS (FOR THE GENERATOR AND POWER STEERING PUMP) (CHECK)

DRIVE BELT TENSION CHECK [2.4L ENGINE]

CAUTION: Check the drive belt tension after turning the crankshaft clockwise one turn or more.

1. Make sure that the indicator mark is within the area marked with A in the illustration.
2. If the mark is out of the area, replace the drive belt.

NOTE: The drive belt tension adjustment is not necessary as auto-tensioner is adopted.

GENERATOR DRIVE BELT TENSION CHECK [3.8L ENGINE]

[WHEN USING SPECIAL TOOL MB992080: RECOMMENDATION]

Required Special Tools:
^ MB992080: Belt tension meter set
^ MB992081: Belt tension meter
^ MB992082: Microphone assembly

1. Connect the special tool MB992082 to the special tool MB992081 of the Special tool MB992080.
2. Press the "POWER" button to turn on the power supply.
3. Press the numeral key of "1" and check that "No. 1" appears on the upper left of the display.

NOTE: This operation is to temporarily set the preset data such as the belt specifications, because if the measurement is taken without input of the belt specifications, conversion to tension value (N) cannot be made, resulting in judgement of error

4. Press "Hz" button twice to change the display to the frequency display (Hz).

CAUTION:
^ The temperature of the surface of the belt should be as close to normal temperature as possible.
^ Do not allow any contaminants such as water or oil to get onto the microphone.
^ If strong gusts of wind blow against the microphone or if there are any loud sources of noise nearby, the values measured by the microphone may not correspond to actual values.
^ If the microphone is touching the belt while the measurement is being made, the values measured by the microphone may not correspond to actual values.
^ Do not take the measurement while the vehicle's engine is running.

5. Hold special tool MB992080 to the middle of the drive belt between the pulleys (at the place indicated by arrow), approximately 10-15 mm (0.4-0.59 inch) away from the rear surface of the belt so that it is perpendicular to the belt (within an angle of ± 15 degree).
6. Press the "MEASURE" button.
7. Gently tap the middle of the belt between the pulleys (the place indicated by the arrow) with your finger as shown in the illustration, and measure that the vibration frequency of the belt is within the standard value.

Standard value: 143-169 Hz

[WHEN USING THE TENSION GAUGE]

Use a belt tension gauge to check that the belt tension is within the standard value.

Standard value: 490-686 N (110-154 pounds)

[BELT DEFLECTION CHECK]

Apply approximately 98 N (22 lb) of force to the middle of the drive belt between the pulleys (at the place indicated by the arrow) and check that the amount of deflection in within the standard value.

Standard value: 8.4-10.7 mm (0.33-0.42 inch)

GENERATOR DRIVE BELT TENSION ADJUSTMENT [3.8L ENGINE]
If the vibration frequency, tension or deflection is outside the standard value, adjust by the following procedure.

1. Loosen the tensioner pulley fixing nut.
2. With the tensioner pulley fixing nut temporarily tightened to 15 ± 5 Nm (11 ± 4 ft-lb), set the belt tension or defection amount to the standard value using the adjusting bolt.

Standard value:

3. Tighten the tension pulley fixing nut.

Tightening torque: 49 ± 10 Nm (36 ± 7ft-lb)

4. When the belt tension is adjusted by measuring the belt deflection, adjust it with a tool for vibration frequency measurement or tension measurement afterward.

POWER STEERING DRIVE BELT TENSION CHECK [3.8L ENGINE]

[WHEN USING SPECIAL TOOL MB992080: RECOMMENDATION]

Required Special Tools:
^ MB992080: Belt tension meter set
^ MB992081: Belt tension meter
^ MB992082: Microphone assembly

With your finger tip lightly tap the center of the drive belt between the pulleys in the location shown by the arrow in the illustration and then measure the belt vibration frequency.

Standard value: 124-160 Hz

NOTE: Refer to generator drive belt tension check, for information regarding the vibration frequency measurement method using the special tool MB992080.

[WHEN USING SCAN TOOL MB991958: RECOMMENDATION]

Required Special Tools:
^ MB991958: Scan Tool (M.U.T.-III Sub Assembly)
^ MB991824: Vehicle Communication interface (V.C.I.)
^ MB991910: M.U.T.-III Main Harness A
^ MB991668: Belt Tension Meter Set

Use a belt tension gauge to check that the belt tension is within the standard value.

Standard value: 294-490 N (66-110 pounds)

[BELT DEFLECTION CHECK]

Apply approximately 98 N (22 lb) of force to the middle of the drive belt between the pulleys (at the place indicated by the arrow) and check that the amount of deflection is within the standard value.

Standard value: 12.3-16.2 mm (0.48-0.64 inch)

POWER STEERING DRIVE BELT TENSION ADJUSTMENT [3.8L ENGINE]
If the vibration frequency, tension or deflection is outside the standard value, adjust by the following procedure.

1. Loosen the tensioner pulley lock nut.
2. Adjust the belt tension to the standard value by turning the adjusting bolt. The tension will increase when turning the adjusting bolt clockwise, and decrease when turning counterclockwise.

Standard value:

3. Tighten the lock nut to the specified torque.

Tightening torque: 49 ± 9 Nm (36 ± 7 ft-lb)

4. Tighten the adjusting bolt.

Tightening torque: 5.0 ± 1.0 Nm (44 ± 9 in-lb)

CAUTION: Check after turning the crankshaft one or more rotations clockwise.

5. Check the belt vibration frequency, tension or deflection amount, and readjust if necessary.
6. When the belt tension is adjusted by measuring the belt deflection, adjust it with a tool for vibration frequency measurement or tension measurement afterward.