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OPERATION
Hydraulic Oil Viscosity and Temperature Chart
Rated
viscosity
at 40° C of
hydraulic oil grade:
ISO VG
Shell Tellus Arctic 32 *1)
Shell Tellus arctic 32 *2)
HLP 22
HLP 32
HLP 46
HLP 68
HLP 100
*1)
Temperature values for new oil (freshly filled in).
*2)
Temperature values for used oil. This temperature value has to be adjusted when the
viscosity of the hydraulic oil has decreased by 10 to 12 percent compared with new oil.
The determination of the hydraulic oil viscosity should be carried out in the course of the
regular oil analysis procedure.
REMARK
The starting and operating temperatures in the above chart
depend on the hydraulic oil viscosity grade used in the system.
Refer to section ELECTRONIC MONITORING AND CONTROL
SYSTEM; menu control chart II for the viscosity grade of the
present oil filling.
For example:
Hydraulic system filled with ISO VG 22 viscosity grade oil.
1. Lowest permissible starting temperature:
-20°C, see column "1"
2. Operating temperature:
min. + 9° C
max. + 58° C, see column "2"
Starting
Operating range
temperature
(100 - 10 cSt)
(max. 1000 cSt)
-1-
°C
- 32
- 34
-20
-14
-6
0
+5
3.10 STARTING THE ENGINE
-2-
°C
10 - 85
5 - 81
8 - 55
16 - 70
25 - 80
32 - 85
39 - 85
181
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