PUMP AND MOTOR DIVISION
Neefestraße 96
09116 Chemnitz, Germany
4 Start up
Prior to start up, the pump case must be filled with hydraulic fluid (use case drain port). Initial start up should be
at zero pressure with an open circuit to enable the pump to prime. Pressure should only be increased once the
pump has been fully primed.
5 Hydraulic fluid
5.1 Recommended Fluids
• Normal mineral oil
• Premium hydraulic fluid / HLP oil
• Biodegradable hydraulic fluid
• Synthetic hydraulic fluid
• Fire resistant fluids
Remark:
Maximum system pressure reduced to 210 bar for water based fluids.
Bearing life time reduced to 25 % by using water based fluids.
5.2 Cleanliness level
Recommendation for maximized component life and reliability:
Class 21 / 18 / 14 according to ISO 4406
5.3 Viscosity range
Minimum viscosity for short periods: 10 mm²/s (cSt)
Normal operating viscosity: 15 – 40 mm²/s (cSt)
Maximum viscosity for short periods: 1000 mm²/s (cSt)
6 Temperature
6.1 Check hydraulic fluid specification for chemical resistance of seal material!
6.2 Check temparture range of seal material and compare with maximum system and
ambient temperature!
N – Nitrile, single shaft seal - 40°C to + 90°C
D – Nitrile, double shaft seal - 40°C to + 90°C
V – Fluorocarbon, single shaft seal - 15°C to + 150°C
T – Fluorocarbon, double shaft seal - 15°C to + 150°C
Remark:
The highest fluid temperature will be at the drain port of the pump, up to 20°C higher than in the reservoir.
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