Crane operation
11.1 Before operating the crane
11 - 16 3 302 819 en Operating manual
GMK3060
13.12.2018
11.1.6 Preheating the hydraulic oil
H
It may take some time for the solenoid valves to be switched or the power units
may be started abruptly if the oil is cold.
The current hydraulic oil temperature is displayed in the start menu.
For crane operation with loads and without speed limitation, the hydraulic oil tem-
perature must be at 10 °C (50 °F).
If the temperatures fall below 10 °C (50 °F), proceed as follows:
– From 10 °C to 0 °C (50 °F to 32 °F)
You can carry out crane movements with loads only at normal speed,
at average engine speed and at average operating speed.
– From 0 °C to -15 °C (32 °F to 5 °F)
To preheat, only carry out crane movements without a load. Only operate at
normal speed, at medium engine speed and medium working speed.
– Below -15 °C (5 °F)
You must preheat the hydraulic oil before carrying out crane movements.
Preheating
– With standard equipment
• Set the slewing gear to a maximum speed of 30%; à p. 11 - 131.
• Lock the turntable; à p. 11 - 19.
• Depress the brake pedal (1).
• Perform the crane function Slewing against the slewing gear brake.
The hydraulic oil is preheated when the display (2) shows a temperature of at
least 10 °C (50 °F).
From -15 °C (32 °F), you can perform crane movements without a load in order
to speed up the preheating process.
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