Greenlee / A Textron Company
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
8
HRD-1 and HRD-58 Hydraulic Ground Rod Drivers
Specifications
(cont’d)
Recommended Hydraulic Fluid
Viscosity
Ideal ..................................................... 20 to 40 cSt
Allowable .......................................... 15 to 1000 cSt
Viscosity Index ...............................................Min. 100
Standard mineral or synthetic oil can be used.
When the tool works continuously, the oil temperature
will steady at a certain level called the oil working
temperature. Depending on the nature of the job and
the cooling capacity of the system, the oil working
temperature will be 20 °C to 40 °C (68 °F to 104 °F)
above the air temperature. At working temperature,
the oil viscosity must be within the ideal area. The
tool may not be operated if the oil viscosity is not
within the allowable area or if the temperature is not
within –20 °C to 70 °C (–4 °F to 158 °F).
The viscosity index expresses the dependence of the
viscosity on the temperature. Thus, a high viscosity
index is preferable so that the oil can be used within
a wide temperature interval.
TYPE OF OIL
Viscosity
at 40 °C
(104 °F)
BP Biohyd 32
36.0 cSt
BP Biohyd 46
44.0 cSt
BP Biohyd SE 46
46.0 cSt
BP Biohyd SE 68
72.2 cSt
CASTROL Biotech HTG 32
36.8 cSt
MOBIL EAL 224 H
36.0 cSt
Q8 Holbein 46
48.4 cSt
SHELL Naturelle HF
35.0 cSt
STATOIL M 32-68
47.4 cSt
SHELL Tellus oil T46
46.0 cSt
ESSO Univis N46
45.7 cSt
TEXACO Rando oil HDZ46
51.0 cSt
MOBIL DTE 15
44.9 cSt
Permitted oil temperature
Recommended oil temperature
(–4 °F)
–20 °C
(14 °F)
–10 °C
(32 °F)
0 °C
(50 °F)
10 °C
(68 °F)
20 °C
(86 °F)
30 °C
(104 °F)
40 °C
(140 °F)
60 °C
(158 °F)
70 °C
(122 °F)
50 °C
Applicable Oil Types
