Manitowoc GROVE GMK4090 Maintenance Manual page 106

Maintenance work on the carrier
7.3 Engine
7 - 24
•
Familiarise yourself with the correct operation of the frequency measur-
à
ing instrument;
•
If necessary, correct the pre-tension until the specified measured value is
achieved.
Separate operating manual .
•
Switch the frequency measuring instru-
ment (1) on – it is now ready for acoustic
measurement.
•
Hold the measuring head (3) over the
V-belt (4).
•
Strike the V-belt (4) with an object (tool) so
that it vibrates.
•
On the display (2), read the measured value:
new V-belt: 78.2 Hz;
run-in V-belt: 68.6 Hz.
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GMK4090