Determining The Centre Of Gravity And Positioning The Transport Trolley And Jack - Jung JLA-e 5/12 G Mode D'emploi

4.2.1 Determining the centre of gravity and
positioning the transport trolley and jack
DANGER
Before a jack is used on the load to be lifted, the centre
of gravity of the load to be lifted must be determined.
Otherwise, tipping or slipping can lead to injuries or
even to fatal accidents. Always determine the centre of
gravity before using JUNG jacks.
The centre of gravity must always be determined before
using a JUNG jack on the load to be lifted. For this
purpose, the entire weight of the load to be lifted must
be determined before the start of the lifting operation.
The following formula can be used for the selection
of the appropriate jack with a sufficient load-bearing
capacity:
Minimum load of the jack = (the load to be
lifted in kg) x (safety factor of 1.25)
Example:
Weight of the load 4 000 kg x 1.25 = 5 000 kg. The
jack must have a load-bearing capacity of 5000 kg.
WARNING
For safety reasons, using multiple jacks with different
load-bearing capacities is not permissible.
If several jacks are used, all of which have the same
carrying capacity, they must be placed under the load
such that each jack is subjected to the same share of
the load to be lifted. For this purpose, the centre of
gravity must be determined in advance.
> To determine the centre of gravity using JUNG jacks,
the pressure gauge for jacks (order no. 94 001 024-B,
additional accessory) must be used.
> Connect the pressure gauge to the hydraulic
connection.
© JUNG Hebe- und Transporttechnik GmbH
Electrically driven trolleys JLA-e 5/12 G, JLA-e 15/30 G and JLA-e 25/50 H
Above: Example 1 - Ideal case
Bottom: Example 2 - Complicated case
The two examples in the diagram illustrate that the
centre of gravity can vary depending on the weight and
shape of the load to be lifted.
Calculation of the centre of gravity on the complica-
ted case (example 2)
1 mm
≤
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