Operating Fluids; Parameters Viscosity; Temperature; Charge Pressure - Sauer Danfoss 40 Series Technical Information

fLuiDs
visCosity

temPeRatuRe

CHaRGe PRessuRe

Case PRessuRe

Series 40 Axial Piston Pumps
Technical Information
Operating parameters
Ratings and performance data are based on operating with premium hydraulic fluids
containing oxidation, rust, and foam inhibitors.These include premium turbine oils, API
CD engine oils per SAE J183, M2C33F or G automatic transmission fluids (ATF), Dexron
II (ATF) meeting Allison C-3 or Caterpillar T0-2 requirements, and certain specialty
agricultural tractor fluids. For more information on hydraulic fluid selection, see Sauer-
Danfoss publications: 520L0463,
and 520L465,
Experience with Biodegradable Hydraulic Fluids, Technical
Maintain fluid viscosity within the
recommended range for maximum
efficiency and bearing life. minimum
viscosity is acceptable only during
brief occasions of maximum ambient
temperature and severe duty cycle.
maximum viscosity is acceptable only
at cold start: Limit speeds until the
system warms up. See Sauer-Danfoss
publications: 520L0463,
and Lubricants, Technical Information
Maintain fluid temperature within the
limits shown in the table. minimum
temperature relates to the physical
properties of the component materials.
Cold oil will not affect the durability of
the motor components. However, it may
affect the ability of the motor to transmit
power. maximum temperature is based on material properties: Don't exceed it. Measure
maximum temperature at the hottest point in the system.This is usually the case drain.
Ensure fluid temperature and viscosity limits are concurrently satisfied.
All systems require a charge (positive pressure) in the low side of the system loop for
proper lubrication and rotating group operation. Maintain low loop (charge) pressure at
a minimum of 6 bar [87 psi] above case pressure. For more information, refer to
Pump, page 25.
Maintain case pressure within the limits
shown in the table. Ensure housing is
filled with hydraulic fluid.
C Caution
Operating outside of charge and case pressure limits will damage the pump.To minimize
this risk, use full size inlet and case drain plumbing, and limit line lengths.
520L0635 • Rev EH • June 2009
Hydraulic Fluids and Lubricants, Technical
Fluid viscosity limits
Minimum
Continuous
Maximum
Hydraulic Fluids
Temperature limits
minimum
(intermittent, cold start)
Continuous
maximum
Case pressure limits
maximum (continuous)
intermittent (cold start)
Information,
Information.
Condition mm /s (cst)
2
7
12-60
1600
- 40° C [- 40° F]
82.2° C [180° F]
104.4° C [220° F]
1.7 bar [25 psi]
5.2 bar [75 psi]
sus
47
70-278
7500
Charge
13