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1.
caution |
- When measuring the vibration frequency,
make sure that the engine is
cold.
- Measure the vibration frequency after
turning the crankshaft clockwise one
turn or more.
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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 number key 1. Check to
ensure that "No. 01" appears on the upper left of the
display and that the following numeric values are displayed
for individual items (M, W, and S): M 000.9
g/m W 010.0 mm/R S 0100 mm If numeric
values have not been entered (new tool), set them according
to the belt specifications as shown below. Once you set
them, you do not have to set them again. The settings remain
undeleted even after battery replacement.
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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<Setting procedure> (1)
Press down the "MASS" button till the belt mass select
display appears. (2)
Press the "UP" or "DOWN" button to select "01 1.5GT 0.9" and
press the "MEASURE" button to decide it. Check to ensure
that "M 000.9 g/m" is displayed. (3)
Press the "WIDTH" button to change to the belt width input
display. (4)
Press number keys 0, 1, 0, and 0 sequentially, and press the
"SELECT" button to apply them. Check to ensure that
"W 010.0 mm/R" appears on the display. (5)
Press the "SPAN" button to change to the span length input
display. (6)
Press number keys 0, 1, 0, and 0 sequentially, and press the
"SELECT" button to apply them. Check to ensure that
"S 0100 mm" appears on the display. 4.Press "Hz"
button twice to change the display to the frequency display
(Hz).
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5.
caution |
- 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.
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Hold the special tool MB992080 to the middle of the
drive belt between the pulleys (at the place indicated by
arrow), approximately 10 - 15 mm away from the rear
surface of the drive belt so that it is perpendicular to the
drive belt (within an angle of ±
15°). 6.Press the "MEASURE"
button. 7.Gently tap the middle of the drive 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 drive belt is within the
standard value. Standard value (Reference): 141
- 249 Hz
note |
To take the measurement
repeatedly, fillip the water pump drive 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. 9.If not within the standard value,
replace the water pump drive belt (Refer to ).
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1.Use a belt tension gauge
in the middle of the 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): 158 -
496 N 2.If not within the standard value,
replace the water pump drive belt (Refer to ).
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