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1.Check for oil leak from
seal, and replace it if leak is detected.
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2.Check for wear or damage
at the top of the rod. Replace it, if required.
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![](../../../img/11/AC102339AC00ENG.png)
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3.Hold the timing belt
auto-tensioner by hand, and press the top end of the rod
onto the metal (e.g. cylinder block) under a pressure of 98
- 196 N to measure the movement of the
rod. Standard value: Within 1
mm
A: Length when it is free (not
pressed) B: Length when it is pressed A
- B: Movement
4.If the
measured value is out of the standard value, replace the
timing belt auto-tensioner.
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1.Check the timing belt B
tension as follows:
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![](../../../img/11/AC507219AB00ENG.png)
![](../../../img/11/AC600461AB00ENG.png)
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2.<Special tool
(MB992080) is used> (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)
Press the numeral key of "1" and check that "No.1" appears
on the upper left of the display.
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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.
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(4)
Press "Hz" button twice to change the display to the
frequency display (Hz). (5)
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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.
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Hold the microphone to the middle of the belt
between the pulleys (at the place indicated by arrow),
approximately 10 - 15 mm 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: 62 - 98
Hz
|
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. 3.If
not within the standard value, adjust the belt tension
(Refer to ).
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Check the balancer timing belt
tension in the following procedures.
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![](../../../img/11/AC301405AC00ENG.png)
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1.Apply a pressure of
approximately 59 N at the centre (arrow area) between the
sprocket as shown in the figure, then inspect whether the
flexure is within the standard value. Standard
value: Less than 11 mm 2.If not within the
standard value, adjust the belt tension. (Refer to ).
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