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Check the drive belt tension in the
following procedure.
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Standard
value:
Item
|
When
checked
|
When
adjusted
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When
replaced
|
Vibration
frequency Hz
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149 -
192
|
161 -
182
|
210 -
243
|
Tension N
|
294 -
490
|
343 -
441
|
588 -
784
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Deflection mm
(Reference)
|
10.4 -
14.0
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11.2 -
13.0
|
7.1 -
9.1
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1.Connect the special tool
microphone assembly (MB992082) to the special tool belt
tension meter (MB992081) of the special tool belt tension
meter set (MB992080).
2.Press the "POWER" button
to turn on the power supply.
3.Check how the belt
tension meter is set (Refer to GROUP 00 - Precautions
Before Service - Belt Tension Meter Set  ).
4.Press
"Hz" button twice to change the display to the frequency
display (Hz).
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5.
| caution |
- The temperature of the surface of the
belt should be as close as possible to
normal temperature.
- Do not let any contaminants such as
water or oil get onto the
microphone.
- If strong gusts of wind blow against the
microphone or if there is 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.
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Hold the microphone to the middle of the drive belt
between the pulleys (at the place indicated by the arrow),
about 10 - 15 mm away from the rear surface of the
belt and so that it is perpendicular to the belt (within an
angle of ± 15 °).
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 check
that the vibration frequency of the belt is within the
standard value.
| note |
To take the measurement
repeatedly, fillip the belt again.
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8.After the completion of the measurement,
press and hold the "POWER" button to turn off the power
supply.
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Use a belt tension gauge to check
that the belt tension is within the standard value.
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Apply approximately 98 N 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.
When the belt
tension is adjusted by measuring the belt deflection, adjust
it with a tool for vibration frequency measurement or
tension measurement afterward.
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If not within the standard value,
adjust the belt tension by the following
procedure.
1.Loosen the nut of the alternator
pivot bolt.
2.Loosen the lock
bolt.
3.Use the adjusting bolt to adjust the belt
tension and belt deflection to the standard
values.
4.Tighten the nut of the alternator pivot
bolt.
Tightening torque: 22 ± 2
N·m
5.Tighten the lock
bolt.
Tightening torque: 22 ± 2
N·m
6.Tighten the adjusting
bolt.
Tightening torque: 5.0 ± 1.0
N·m
7.
| caution |
When checking the belt
tension, turn the crankshaft clockwise one turn
or more.
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Check the belt tension, and readjust if
necessary.
8.When the belt tension is adjusted by
measuring the deflection, adjust it with a tool for
vibration frequency measurement or tension measurement
afterward.
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Check the drive belt tension in the
following procedure.
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Standard
value:
Vibration
frequency Hz
|
199 -
257
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Tension N
|
294 -
490
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Deflection mm
(Reference)
|
8.1 -
11.2
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With your finger tip lightly tap
the centre of the drive belt between the pulleys in the
location shown by the arrow in the illustration and then
measure the belt vibration frequency.
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Use a belt tension gauge to check
that the belt tension is within the standard value at the
centre of the drive belt between the pulleys in the location
shown by the arrow in the illustration.
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Apply approximately 98 N of force
to the middle of the centre of the drive belt between the
pulleys in the location shown by the arrow in the
illustration and check that the amount of deflection is
within the standard value.
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When the belt tension is adjusted
by measuring the belt deflection, adjust it with a tool for
vibration frequency measurement or tension measurement
afterward.
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1.Loosen the power steering
oil pump mounting bolts shown in the
figure.
2.Move the power steering oil pump gently
and adjust the belt tension and belt deflection to the
standard values.
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Standard
value:
Items
|
When
adjusted
|
When
replaced
|
Vibration
frequency Hz
|
215 -
244
|
271 -
293
|
Tension N
|
343 -
441
|
542 -
640
|
Deflection mm
(Reference)
|
8.7 -
10.3
|
6.4 -
7.4
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3.Tighten the power steering oil pump
mounting bolts.
Tightening torque: 23 ± 3
N·m
| caution |
When checking the belt
tension, turn the crankshaft clockwise one turn
or more.
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1.
| caution |
- When measuring the tension, make sure
that the engine is cold.
- Measure the tension after turning the
crankshaft clockwise one turn or
more.
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Use a belt tension gauge in the middle of the
A/C compressor drive belt between the pulleys shown in
the figure (at the place indicated by the arrow) to check
that the drive belt tension is within the standard
value.
Standard value (Reference): 257 -
827 N
2.If not within the standard value,
replace the A/C compressor drive belt.
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1.
| caution |
- When measuring the deflection, make sure
that the engine is cold.
- Measure the deflection after turning the
crankshaft clockwise one turn or
more.
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Apply approximately 100 N of force to the middle of
the A/C compressor 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 (Reference): 14.6 mm or
less
2.If not within the standard value,
replace the A/C compressor drive belt.
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