Temperature; Viscosity - Danfoss H1 Series Technical Information

Technical Information
H1 Bent Axis Variable Displacement Motors, Size 060/080/110/160/210/250
Operating parameters

Temperature

Viscosity

© Danfoss | December 2016
The high temperature limits apply at the hottest point in the transmission, which is normally the motor
case drain. The system should generally be run at or below the published rated temperature.
The maximum intermittent temperature is based on material properties and should never be
exceeded.
Cold oil will generally not affect the durability of the transmission components, but it may affect the
ability of oil to flow and transmit power. Therefore, temperatures should remain 16 °C [30 °F] above the
pour point of the hydraulic fluid.
The minimum temperature relates to the physical properties of component materials.
Size heat exchangers too keep the fluid within these limits. Danfoss recommends testing to verify that
these temperature limits are not exceeded.
For maximum efficiency and bearing life, ensure that the fluid viscosity remains in the recommended
range.
The minimum viscosity should be encountered only during brief periods of maximum ambient
temperature and severe duty cycle operation.
The maximum viscosity should be encountered only at cold start.
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