General Information Fluid recommendations Premium quality hydraulic mineral fluid is recommended, like HLP oils to DIN 51524 (part 2 & 3) or ISO6743/4 (HM & HV). Brugger-value recommended to be 30 N/mm2 minimum for general application and 50 N/ mm2 for heily loaded hydraulic equipment and fast cycling machines and/or high dynamic loads, measured in accordance with DIN 51 347-2. See also Document MSG30-3248/UK Parker Hydraulic Fluids.
Viscosity The normal operating viscosity should range between 16 and 100 mm2/s (cSt). Max. start-up viscosity is 1000 mm2/s (cSt). Filtration For maximum pump and system component functionality and life, the system should be protected from contamination by effective filtration. Fluid cleanliness should be in accordance with ISO classification ISO 4406:1999. The quality of filter elements should be in accordance with ISO standards. General hydraulic systems for satisfactory operation: Class 20/18/15, according to ISO 4406:1999 Recommended cleanliness for maximum component life and functionality: Class 18/16/13, according to ISO 4406:1999 Seals Check hydraulic fluid specification for chemical resistance of seal material. Check temperature range of seal material and compare with max. system and ambient temperature. N – Nitrile (FKM shaft seal) -25…+ 90 °C V – FKM (FKM shaft seal) -25…+115 °C W – Nitrile (PTFE shaft seal) -30…+ 90 °C Note: The highest fluid temperature will be at the drain port of the pump, up to 25 °C higher than in the reservoir.