21
EATON
Duraforce HMR Conversion Procedures Manual E-MOPI-TM005-E July 2012
Operational Parameters
Pressure Fluids
In order to ensure the functional performance and high
efficiency of the hydraulic motors the viscosity and
purity of the operating fluid should meet the different
operational requirements. Eaton recommends using only
hydraulic fluids which are confirmed by the manufacturer
as suitable for use in high pressure hydraulic installations
or approved by the original equipment manufacturer.
• Mineral oil HLP to DIN
51 524-2
• Biodegradable fluids in
accordance with ISO 15
380 on request
• Other pressure fluids on
request
Eaton offers an oil testing
service in accordance with
VDMA 24 570 and the test
apparatus required for in-house
testing. Prices available on
request.
Pressure Fluid Temperature Range
[°C]
-20 to +90
Working viscosity range
[mm²/s] = [cSt]
10 to 80
Optimum working viscosity
[mm²/s] = [cSt]
15 to 30
Max. viscosity (short time start up)
[mm²/s] = [cSt]
1000
Permitted Pressure Fluids
Recommended Viscosity
Ranges
Viscosity
Recommendations
In order to be able to select
the right hydraulic fluid
it is necessary to know
the working temperature
in the hydraulic circuit.
The hydraulic fluid should
be selected such that its
optimum viscosity is within
the working temperature
range (see tables).
The temperature should
not exceed 90°C (194°F)
in any part of the system.
Due to pressure and
speed influences the
leakage fluid temperature
is always higher than the
circuit temperature. Please
contact Eaton if the stated
conditions cannot be met
in special circumstances.
Working Temperature
Viscosity Class
Temperature
[mm²/s] = [cSt] at 40°C (104°F)
Approx. 30 to 40°C (86 to 104°F)
22
Approx. 40 to 60°C (104 to 140°F)
32
Approx. 60 to 80°C (140 to 176°F)
46 or 68
Further information regarding installation can be found in the operating instructions.
