Maintenance work on the carrier
7.16 Air-conditioning system
03.11.2017
Maintenance manual 3 302 574 en 7 - 117
GMK3060
• Familiarise yourself with the correct operation of the frequency measur-
ing instrument;
à Separate operating instructions.
• 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.
• Read the measurement on the display (2):
new V-belt: 68 Hz;
run-in V-belt: 60 Hz.
• If necessary, correct the pre-tension on the tensioning bar until the speci-
fied measurement is achieved.
• Check the tension on a newly installed V-belt for the first time after 4
operating hours (oper. hrs.) and then after 24 operating hours (oper. hrs.).
H
Maintenance of the fan V-belt (1) and alternator V-belt fitted as standard
equipment is described in the documentation supplied;
à Engine manufac-
turer’s documentation
.
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