Lubricants and operating fluids
Technical documentation
Hydraulic liquids Fully saturated synthetic ester-based oils, HEES Before using biodegradable hydraulic oil, you must consult LIEBHERR. Do not use vegetable oils, as they do not possess the necessary thermal stability. If you wish to use other products, it is your responsibility to obtain a warranty declaration from the oil supplier.
7.5
Monitoring, filter change and oil change Note! Biodegradable hydraulic oils must be checked regularly by means of an oil analysis. – Normal operation after change of oil* an then at least every 500 operating hours – Dust intensive application: after change of oil* an then at least every 250 operating hours For mineral oils, an oil analysis is only required if the oil change interval is to be extended. – Normal operation first time after 1500 operating hours, then every 500 operating hours – Dust intensive application: at least every 250 operating hours LIEBHERR recommends contacting WEAR-CHECK** with these analysis,and to change the oil when indicated by the test results in the lab report (see also customer service and product information). * Change of oil = change from mineral oil to environmentally-friendly hydraulic oil ** Yellow kit for machines with environmentally-friendly oil filling (HEPR and HEES) Green kit for machines with mineral oil filling
Symbol
Signification Filter change for hydraulic oil
Oil sampling
Tab. 8
Key to figures
Hydraulic oil in normal use
Fig. 5
Oil sampling and filters change in normal use h
Operating hours
1
First oil sample
a h
Mineral oil Biodegradable hydraulic oil
2 3
Second oil sample Subsequent oil samples every 500 operating hours
Oil change after 2000 operating hours, or when indicated by the lab report of the
1.51.12
R 924 Compact Tier III copyright by
MJFCIFSS