Manitowoc GROVE GMK4090 Maintenance Manual page 181

Dispatch the oil
sample to the lab-
oratory
Determining the
quality of the oil
Maintenance manual
GMK4090
Manitowoc Crane Care
lysed at our contracted laboratory. A delivery note and a protective mailing bag
are available along with the sample containers (GROVE part no. 03141012).
You will get the laboratory analysis via the Internet in a short time.
•
Label the sample container prior to dispatch with
– the truck crane serial number,
– date of sample,
– the number of operating hours since the last oil change and
– the sampling location (e.g. gauge port on a control block).
•
Have the following properties of the oil sample determined by the
laboratory:
– Viscosity
– Viscosity index
– Contamination
– Water content
•
Compare the laboratory analysis with the limit values and carry out the
specified measures if necessary.
Viscosity limit values
– Viscosity ISO-VG 32 as per DIN 51524 Part 2.
– Viscosity index V
If one of these limit values has been reached/fallen short of:
•
Carry out an oil change;
Contamination limit value
– Contamination as per NAS 1638 Class 7 or ISO 4406:1999
Code 18/16/13 (purity class).
If this limit value has been reached/exceeded:
•
Replace the filters of the hydraulic system;
•
Have the hydraulic oil cleaned with a mobile filter unit until the required
cleanliness class is achieved.
Water content limit value
– Water content ≤ 100 ppm.
If this limit value has been reached/exceeded:
•
Have the hydraulic oil cleaned with a mobile water separator until the
water content is clearly below the limit value.
gives you the opportunity to have the oil sample ana-
≥ 150.
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Maintenance work on the carrier
7.15 Hydraulic system
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p. 7 - 106.
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