Operation
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05_0175_0710GB
During normal pump operation, the temperature of the hydraulic oil is
between 55 C and 60 C.
The following factors can cause the hydraulic oil to overheat, espe-
cially when occurring together:
-- Continuous operation under high load conditions
-- High ambient temperatures
-- Insufficient oil in the hydraulic system
-- Radiator dirty
-- Insufficient supply of cooling air, inadequate air extraction
-- Radiator is taking in hot exhaust fumes (depending on the en-
gine type)
-- Excess pressure caused by blockages
-- Insufficient water in the water box
All pumps have a thermoelectric cutoff. The pump is switched off au-
tomatically if the oil overheats to above 90 C. The drive motor conti-
nues to run for cooling purposes.
The “Hydraulic oil temperature” status display lights up on the con-
trol unit. The “Hydraulic oil temperature” fault message is shown on
the display.
Proceed as follows to prevent shutdown when the hydraulic oil tem-
perature is excessively high during pump operation:
Reduce the delivery rate.
Fill the water box immediately with fresh water as soon as the
fluid temperature rises above 70 C.
6.13 Overheating
