Preparing for crane operation 3.2-1
3.2. Preparing for crane operation
3.2-1 Cold start in low outside temperatures
In case of outside temperatures below freezing point:
Appearances, operating stations (spaces occupied) and all mobil crane construction units are to be
cleaned if necessary before beginning of the work from ice and snow to.
0
40
30
20
10
-10
-20
-30
• Switch on the pump unit at lowest motor rotation speed.
• Let the oil pump around without pressure for a few minutes so that it warms
up a little.
• You can accelerate warming up of the oil by accelerating a hydraulic cylinder
to the end stop.
At temperatures below 0° C make sure that your crane is being
operated with a hydraulic fluid which is suitable for such
temperatures.
The crane may only be operated by one person (operator) and from a operating stand.
3.2-2 Supporting vehicle properly
• The crane must only be operated in properly supported condition.
• Park the vehicle properly and apply the handbrake.
Some crane models can be optionally equipped with one or two slewing gears. If they have only one
slewing gear the vehicle’s inclination during crane operation must not exceed 3,5°. If this value is
exceeded und the crane lifts heavier loads this can affect the crane function „slewing”. The crane will
not slew back.
Spirit level
Every crane control stand disposes of a bubble where the inclination of the lorry is indicated.
The bubble in the center of the gauge indicates that the crane is in a
horizontal position.
The bubble between the two circles indicates that the crane
inclination is between 0° and 5°.
After the crane has been mounted on the lorry, the mounting
company has to adjust the spirit level.
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