Ammann ASC 200 Series, Operating Manual

Page: 117 / 198

117 ASC110/ASC130/ASC150/ASC200/ASC250
OPERATING INSTRUCTIONS
2.9.3.2. Operating the machine at
higher temperature and
humidity
Engine power output decreases with increasing temper-
ature and air humidity. With regards to the fact that the two
factors are independent of each other, their influence can
be described as follows:
- every 10 °C (18 °F) of temperature rise results in
power output decrease of up to 4 % (at a constant
humidity)
- every 10 % of relative humidity rise results in power
output decrease of up to 2 % (at a constant tempera-
ture).
At high ambient temperatures when hydraulic oil temper-
ature reaches permanently around 90 °C (194 °F), it is
recommended to exchange hydraulic oil for oil a grade
higher - of kinematic viscosity 100 mm
2 /s (e.g. BP BAR-
TRAN HV 100, ESSO UNIVIS N100, etc.).
! NOTE !
When working under extreme condi-
tions, when cooling liquid or hydraulic
oil temperatures reach maximum al-
lowed limits, it is possible to increase
cooling capacity of the cooling system by
removing bonnet lower shields resulting
in better withdrawal of hot air from the
engine compartment.
•
If the hydraulic system is filled with oil of grade
HV 46, the maximum allowed oil temperature is 80 °C
(144 °F);
HV 32, the maximum allowed oil temperature is 70 °C
(158 °F).
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