Fuels, lubricants and process chemicals
Service Manual
Hydraulic oil When using these hydraulic oils, bypass filtration might be omitted. If these oils are not available locally, use a fully saturated hydraulic environmental ester synthetic (HEES fluid) (before choosing an oil, contact the respective customer service department). When using synthetic ester-based fluids, bypass filtration is mandatory. When using such fluids, we recommend replacing the hydraulic hoses every 4000 operating hours or latest every 4 years. Do not use vegetable oils, as they do not possess the necessary thermal stability. The use of polyglycols is not permissible, as they cause damage to paintwork. When using third-party products, we advise customers to request a certificate from the oil manufacturer, confirming that the product meets the above specifications.
6.5
Monitoring, filter change and oil change Symbol
Description Filter change for hydraulic oil
Oil sampling
Tab. 6
Key to diagrams
Hydraulic oil in normal use:
Fig. 5
Oil sampling and filter change in normal use
h
Operating hours
1
First oil sample
a
Mineral oil
2
Second oil sample
b
Biodegradable hydraulic oil
3
Subsequent oil samples: every 500 operating hours
Interval for the change of the hydraulic oil return filter (20 / 5 Âľm): first change after 500 and 1000 operating hours, then every 1000 operating hours and after each hydraulic oil change. Interval for mineral oil change: every 2000 operating hours, or when indicated by the lab report or analyses. Oil change intervals for mineral oils may only be extended, if an oil analysis has been carried out. The first analysis must be performed after 1500 operating hours, subsequent analyses must be carried out every 500 operating hours. The oil change intervals for bio oils are determined solely by oil analyses and lab reports.
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